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PCB Mount Custom Common Mode Choke Toroidal Coil High Current For EMI Filter

China PCB Mount Custom Common Mode Choke Toroidal Coil High Current For EMI Filter

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PCB Mount Custom Common Mode Choke Toroidal Coil High Current For EMI Filter

MOQ： 3000 pcs
Price： $0.78-$1.08
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Core material	Ferrite
Turns ratio	Primary to Secondary varies by model
Supply Ability	200K-500K pcs / Month
Inductance	1uH - 100uH (Customizable)
Delivery Time	15-30 working days
Operatingtemperaturerange	-40°C to +85°C
Payment Terms	T/T
Isolation voltage	3000V AC
Inputvoltage	85V - 265V AC
Winding material	Copper
Mounting type	PCB Mount
Packaging Details	Carton
Certification	UL/ISO9001/ISO14001/RoHS/Reach
Model Number	T953
Place of Origin	China
Brand Name	Chipsen

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Product Details
Company Details

Product Specification


Core material	Ferrite	Turns ratio	Primary to Secondary varies by model
Supply Ability	200K-500K pcs / Month	Inductance	1uH - 100uH (Customizable)
Delivery Time	15-30 working days	Operatingtemperaturerange	-40°C to +85°C
Payment Terms	T/T	Isolation voltage	3000V AC
Inputvoltage	85V - 265V AC	Winding material	Copper
Mounting type	PCB Mount	Packaging Details	Carton
Certification	UL/ISO9001/ISO14001/RoHS/Reach	Model Number	T953
Place of Origin	China	Brand Name	Chipsen
High Light	Custom toroidal common mode choke ，PCB Mount toroidal common mode choke ，EMI Filter Inverter surface mount common mode choke

Custom Common Mode Choke Toroidal Coil High Current for EMI Filter Inverter

Vertical Mount Toroidal Common Mode Choke Inductor - 4 Pin Through Hole EMI Filter Coil

Product Introduction

This vertical mount toroidal common mode choke is a dual-winding EMI suppression inductor built on a high permeability ferrite toroidal core, with two symmetrical windings wound in opposite directions and terminated on a flame retardant 4-pin plastic base for through hole PCB mounting.

The working principle is straightforward: differential mode current (your useful signal or power current) flows through the two windings in opposite directions, so the magnetic flux cancels and the choke presents almost no impedance to it. Common mode noise current, however, flows through both windings in the same direction, so the flux adds up and the choke presents very high impedance, blocking the noise before it reaches the power line or the load. The result is clean conducted emission performance without sacrificing power transfer efficiency.

The green epoxy coated toroidal core provides mechanical protection and a reinforced insulation barrier between the core and the enameled copper windings. Two different wire colors are used for the two windings to make polarity identification and automated assembly easier on the production line. The rigid base keeps the core stable under vibration and guarantees a consistent standoff height on the PCB, which is critical for wave soldering and for maintaining creepage distance in AC line applications.

The component is fully customizable. Core size, permeability, inductance value, wire gauge, number of turns, pin pitch, base dimensions and insulation class can all be engineered to match your circuit topology, your target attenuation curve and your safety approval requirements. Every unit is 100% tested for inductance, DC resistance, hi-pot withstanding voltage and open/short continuity before packing.

Technical Parameters

No.	Item	Specification
1	Product Type	Toroidal common mode choke coil, dual winding, vertical mount
2	Part Number	Customized according to customer drawing or specification
3	Core Material	Mn-Zn ferrite toroid, high permeability (nanocrystalline / amorphous core available on request)
4	Core Coating	Green epoxy resin coating, reinforced insulation between core and winding
5	Common Mode Inductance	0.5 mH to 100 mH (typical range, customizable)
6	Inductance Tolerance	+/-30% standard, tighter tolerance available on request
7	Test Condition	10 kHz / 0.25 V (LCR meter, series mode)
8	Rated Current	0.3 A to 20 A (depending on wire gauge and core size)
9	DC Resistance (DCR)	5 mOhm to 2000 Ohm, per winding, measured at 20 degC
10	Rated Voltage	AC 250 V / AC 300 V line voltage class
11	Dielectric Withstanding Voltage	AC 1500 V to 3000 V, 1 minute, winding to winding and winding to core
12	Insulation Resistance	>= 100 MOhm at DC 500 V
13	Leakage (Differential Mode) Inductance	Approximately 0.5% to 2% of common mode inductance
14	Winding Wire	Class 155 / Class 180 enameled copper wire (UEW / EIW), triple insulated wire optional
15	Insulation Class	Class B (130 degC) / Class F (155 degC) / Class H (180 degC)
16	Temperature Rise	<= 40 K at rated current
17	Operating Temperature	-40 degC to +125 degC
18	Storage Temperature	-25 degC to +85 degC, humidity <= 70% RH
19	Base / Bobbin Material	PBT or Phenolic, UL 94V-0 flame retardant
20	Terminals	4 pins, tinned copper, through hole vertical mount, pin pitch customizable
21	Solderability	245 +/-5 degC for 3 +/-0.5 seconds, >= 95% coverage
22	Compliance	RoHS and REACH compliant, halogen free material available
23	Packaging	Anti-static tray or carton with foam partition, moisture barrier bag
24	MOQ	1,000 pcs

Note: the values above cover the standard production window of this product family. Final electrical parameters are locked with your engineering team before tooling and sampling.

Product Features

High common mode impedance with low differential mode loss. The symmetrical opposite winding structure cancels differential flux, so noise is attenuated while the working current passes through with minimal insertion loss.
Wide attenuation bandwidth. High permeability Mn-Zn ferrite delivers effective suppression across the conducted emission band from 150 kHz to 30 MHz, helping the end product pass EN 55032, EN 55014, FCC Part 15 and CISPR conducted emission testing.
Toroidal closed magnetic circuit. A closed core path means very low magnetic flux leakage, so the choke does not couple noise into nearby components and is far less sensitive to external interference than open core structures.
Reinforced insulation system. The epoxy coated core plus Class 155/180 enameled wire and optional triple insulated wire allow a winding to winding withstanding voltage up to AC 3000 V, suitable for primary side AC line filtering.
Stable performance under temperature. Operating range from -40 degC to +125 degC with a temperature rise controlled within 40 K at rated current, so the inductance value stays predictable in enclosed power supply housings.
Mechanically robust vertical base. The 4-pin flame retardant base fixes the toroid firmly, resists vibration and shock, keeps the mounting height uniform and protects the winding from board level stress during handling and soldering.
Space saving vertical footprint. The upright mounting orientation occupies a small PCB area compared with horizontal toroid mounting, which matters in high density power boards.
Wave solder and automated assembly friendly. The standardized pin arrangement, tinned copper terminals and rigid base make the part compatible with automatic insertion and wave soldering processes.
Fully customizable. Inductance, current rating, wire gauge, core material, pin pitch, base size, lead length and insulation class are all built to your drawing.
100% electrical inspection. Inductance, DCR, hi-pot and continuity are tested on every single piece, with sampling inspection on appearance and dimensions per AQL standard.

Product Applications

Power Supply and Conversion

AC/DC switching mode power supplies, adapters and chargers
DC/DC converters and auxiliary power modules
Uninterruptible power supplies (UPS) and industrial power units

New Energy and Power Electronics

Solar photovoltaic inverters and micro inverters
Energy storage systems and battery management units
Electric vehicle onboard chargers and DC charging piles

Industrial and Automation

Industrial control cabinets, PLC and servo drive systems
Variable frequency drives and motor controllers
Instrumentation, measurement equipment and sensor front ends

Lighting and Appliance

LED drivers and intelligent lighting control gear
White goods including air conditioners, washing machines and refrigerators
Small kitchen appliances with switching power boards

Communication and Consumer Electronics

Telecom power systems, base station power modules and routers
Set top boxes, network equipment and audio/video devices
Office equipment, medical electronics and security systems

Typical circuit position: EMI input filter stage at the AC line inlet, DC bus filtering before the converter stage, and output stage noise suppression before the load.

Advantages

Company Advantages

Established Manufacturer, Not a Trading Company
DongGuan Chipsen Electronics Technology Co., Ltd. was founded in 2000 and has focused on magnetic components and power solutions for 26 years. We own our production base, so you deal directly with the people who make the parts.
Real Manufacturing Capacity
A 10,000 square meter self-owned factory with 8 complete production lines and an annual transformer output of approximately 2,400KK pcs. Capacity headroom means your delivery schedule is not squeezed out by larger accounts.
Engineering Team That Joins Your Project Early
A 20-person R&D team with senior engineers averaging more than 26 years of experience. We review your schematic, target attenuation curve and space constraints before quoting, instead of quoting blind on a part number.
Complete Certification System
System certification: ISO 9001 quality management and ISO 14001 environmental management.
Product certification: CE, CB, UL, cUL and RoHS.
Independent Quality Control
A dedicated 20-person QC team runs incoming material inspection, in-process control and final electrical testing. Full electrical testing is applied to every unit, not to samples only.
Proven in Demanding Markets
Annual export value of USD 42 million, shipping to North America (50%), Northern Europe (18%), South America (15%) and Southeast Asia (15%). Served customers include Midea and Federal Signal, as well as North American inverter manufacturers.
Practical Trade Support
An 11-person export team, DDP and DDU terms supported, participation in 2 international exhibitions every year, and flexible payment via T/T, PayPal and Western Union.

Product Advantages

Noise Suppression Without Efficiency Penalty
The opposite winding structure blocks common mode noise while letting differential mode working current pass with minimal loss, so you gain EMC margin without adding heat to the power path.
Engineered to Your Attenuation Target
Rather than forcing you to pick from a fixed catalogue, we tune core permeability, turns and wire gauge against your measured conducted emission curve, closing the gap at the specific frequency band where your design fails.
Safety Margin Built In
Reinforced insulation between windings, hi-pot capability up to AC 3000 V, UL 94V-0 base material and optional triple insulated wire give you room to pass safety approval on primary side circuits.
Thermal Stability for Sealed Enclosures
Temperature rise controlled within 40 K at rated current and a -40 degC to +125 degC operating window keep the inductance stable inside compact, poorly ventilated power housings.
Consistency Batch After Batch
Automated winding, fixed process parameters and 100% electrical testing hold the inductance and DCR distribution tight, so your line does not see performance drift between deliveries.
Production Line Friendly
Uniform standoff height, tinned pins and a rigid base reduce insertion defects and rework cost in wave soldering and automated assembly.
Low Total Cost of Ownership
Fewer EMC redesign loops, fewer field failures and stable delivery cycles usually outweigh the unit price difference against an untested low cost source.

Frequently Asked Questions

Q1: Are you a factory or a trading company?

A1: We are a manufacturer with our own facility. DongGuan Chipsen Electronics Technology Co., Ltd. operates a 10,000 square meter self-owned production base in Changping Town, Dongguan, Guangdong, China, with 8 complete production lines. You are welcome to visit or arrange a video factory tour.

Q2: What is your minimum order quantity?

A2: The standard MOQ is 1,000 pcs. For a first cooperation or a trial build we can discuss a smaller pilot quantity, and the exact figure depends on the complexity of the customized structure.

Q3: Can you make this common mode choke to our own specification?

A3: Yes, customization is our core business. Send us your required common mode inductance, rated current, working voltage, target attenuation band, pin pitch and maximum allowed dimensions, or simply send your drawing or a sample. Our engineering team will propose a core size, permeability and winding scheme, and confirm every parameter with you before tooling.

Q4: What certifications do you hold?

A4: System certification includes ISO 9001 and ISO 14001. Product certification includes CE, CB, UL, cUL and RoHS. If your destination market requires an additional local approval, tell us early and we will help evaluate the feasibility and the schedule.

Q5: How long does sampling and mass production take?

A5: Samples are normally ready in about 7 to 10 working days after the specification is confirmed, and mass production typically runs about 15 to 25 days after sample approval and order confirmation. The exact lead time is quoted per order, because it depends on quantity, wire gauge availability and whether new tooling is needed.

Q6: What payment terms do you accept?

A6: We accept T/T (bank transfer), PayPal and Western Union. T/T is normally used for production orders and PayPal or Western Union is convenient for sample orders and small value payments. Payment terms are confirmed on the proforma invoice before production starts.

Q7: How do you control quality?

A7: We run a three stage control system: incoming material inspection, in-process control during winding and assembly, and final testing. Every single unit is tested for inductance, DC resistance, hi-pot withstanding voltage and open/short continuity, and appearance and dimensions are inspected by sampling according to AQL standard. A 20-person QC team is responsible for the whole chain.

Q8: How should I choose the right common mode inductance value?

A8: It depends on where your conducted emission test fails. If you exceed the limit in the low frequency band, from 150 kHz to about 2 MHz, a higher inductance with high permeability material is usually needed. If the problem sits in the high frequency band, a lower inductance with fewer turns and lower parasitic capacitance normally works better. Send us your EMI scan report and we will recommend a specific configuration instead of asking you to guess.

Q9: Which shipping terms and methods do you support?

A9: We support EXW, FOB, CIF, DDU and DDP. Small samples usually go by international express, and bulk orders go by air or sea depending on your urgency and volume. All goods ship directly from our factory in China. Please note that we do not operate an overseas warehouse and we do not offer dropshipping service.

Q10: What if the parts do not meet the agreed specification?

A10: Contact us with the batch information, the test conditions and the measured data. We will replicate the test on our side against the retained sample from the same batch. If the deviation is confirmed to be our responsibility, we will arrange replacement or credit and issue a corrective action report explaining the root cause and the preventive measure.

Q11: Can you provide technical documents for our safety approval?

A11: Yes. We can supply the product specification sheet, material list, RoHS and REACH declarations, and relevant certification documents. For safety file submission we also provide insulation system details and winding construction information as required.

Q12: Do you support long term supply agreements and stock planning?

A12: Yes. For customers with stable annual demand we can arrange a blanket order with scheduled releases, which shortens the effective lead time and protects you from material price fluctuation during the agreed period.

Company Details

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Business Type:

Manufacturer 
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Year Established:

2007 
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Total Annual:

28820000-29820000
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Employee Number:

400~450 
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Ecer Certification：

Verified Supplier 

Chipsen Electronics - Supplier to Fortune Global 500 Companies Magnetic Components Engineered for Performance & Reliability Founded in 2007, Dongguan Chipsen Electronics Technology Co., Ltd. is a professional manufacturer specializing in magnetic components and micro switches. ... Chipsen Electronics - Supplier to Fortune Global 500 Companies Magnetic Components Engineered for Performance & Reliability Founded in 2007, Dongguan Chipsen Electronics Technology Co., Ltd. is a professional manufacturer specializing in magnetic components and micro switches. ...

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Dongguan Chipsen Electronics Technology Co., Ltd.
No. 234, Changhuang Road, Changping Town, 523586, Dongguan, Guangdong, China
https://www.chipsen.net/

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