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Compact encapsulated smd ntc thermistor ste smdntc3225n4r704mk0 for circuit

China Compact encapsulated smd ntc thermistor ste smdntc3225n4r704mk0 for circuit

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Compact encapsulated smd ntc thermistor ste smdntc3225n4r704mk0 for circuit

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Operating Temperature	-40℃~+175℃
Description	SMD,8.1x6mm NTC Thermistors RoHS
Mfr. Part #	SMDNTC3225N4R704MK0
Package	SMD,8.1x6mm
Model Number	SMDNTC3225N4R704MK0

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Product Details
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Product Specification


Operating Temperature	-40℃~+175℃	Description	SMD,8.1x6mm NTC Thermistors RoHS
Mfr. Part #	SMDNTC3225N4R704MK0	Package	SMD,8.1x6mm
Model Number	SMDNTC3225N4R704MK0

Product Overview

The SMD-3225 Series Encapsulated SMD NTC Thermistors are designed for circuit protection and general electronic applications. Featuring advanced encapsulation technology with UL94-V0 rated materials, these thermistors offer a compact size, space-saving design, and excellent high-temperature and high-humidity performance. They possess strong surge suppression capabilities and are supplied in SMD tape packaging, compatible with lead-free reflow/wave soldering and automatic placement.

Product Attributes

Brand: Songtian ()
Series: SMD-3225
Type: Encapsulated SMD NTC Thermistor
Encapsulation Material: Meets UL94-V0
Packaging: SMD Tape Reel
Certifications/Standards: Lead-free compatible (Reflow/Wave Soldering)
Origin: China ()

Technical Specifications

Key Features & Applications

Features: Advanced encapsulation, compact size, excellent high-temperature/high-humidity performance, strong surge suppression, SMD tape packaging for automatic placement.
Applications: Circuit protection, industrial equipment, communication equipment, consumer electronics, automotive electronics.

Part Numbering Principle

SMD NTC 3225 N 2R5 05 M 0

NTC: Negative Temperature Coefficient Thermistor
SMD: Model Type
3225: Size (Approx. 8.1*6.0mm)
N/W: Lead Shape (N: Inner Fold, W: Outer Fold)
Resistance Value @ 25C: e.g., 2R5 (2.5), 020 (2.0), 201 (200)
Max. Steady State Current: e.g., 05 (5.0A), S5 (1.5A)
Resistance Tolerance: e.g., M (20%), L (15%)

Product Marking Example

1. Songtian Logo, 2. NTC, 3. 3225 (Size), 4. 050 (Resistance @ 25C: 5.0), 5. M (Tolerance: 20%)

Dimensions

Outer Fold (W) Lead Shape:

Parameter	Value (mm)
L	8.1 0.3
L1	10.0 0.3
W	6.0 0.3
L2	11.4 0.3
H	2.5 0.3
L3	0.5 0.3
W1	2.5 0.3
T	0.15 0.01

Pad Dimensions (Outer Fold):

Parameter	Value (mm)
a	10.0 0.2
b	2.2 0.2
c	3.6 0.2

Inner Fold (N) Lead Shape:

Parameter	Value (mm)
L	8.1 0.3
L1	8.5 0.3
W	6.0 0.3
L2	6.0 Min
H	2.5 0.3
L3	1.1 0.3
W1	2.5 0.3

Pad Dimensions (Inner Fold):

Parameter	Value (mm)
a	5.7 0.2
b	1.65 0.2
c	3.0 0.2

Electrical Performance

Model	Resistance @ 25C ()	Max. Steady State Current @ 25C (A)	Residual Resistance @ Max. Steady State Current ()	B Value (K) 10%	Thermal Time Constant (S)	Thermal Dissipation Coefficient (mW/C)	Operating Temp. Range (C)
SMDNTC32251R505*	1.5	5	0.065	2600	<43	>13	-40 to 175
SMDNTC322502005*	2	5	0.085	2600	<43	>13	-40 to 175
SMDNTC32252R505*	2.5	5	0.095	2600	<43	>13	-40 to 175
SMDNTC322503005*	3	5	0.100	2600	<43	>13	-40 to 175
SMDNTC322504004*	4	4	0.150	2600	<44	>13	-40 to 175
SMDNTC322505004*	5	4	0.156	2800	<45	>13	-40 to 175
SMDNTC322506003*	6	3	0.240	2800	<45	>13	-40 to 175
SMDNTC32256R803*	6.8	3	0.245	2800	<45	>13	-40 to 175
SMDNTC322507003*	7	3	0.2824	2800	<45	>13	-40 to 175
SMDNTC322508003*	8	3	0.255	2800	<47	>14	-40 to 175
SMDNTC322510003*	10	3	0.275	2800	<47	>14	-40 to 175
SMDNTC322512002*	12	2	0.462	2800	<48	>14	-40 to 175
SMDNTC322513002*	13	2	0.465	2800	<50	>14	-40 to 175
SMDNTC322515002*	15	2	0.468	2800	<50	>14	-40 to 175
SMDNTC322516002*	16	2	0.470	2800	<50	>14	-40 to 175
SMDNTC322518002*	18	2	0.495	3000	<52	>15	-40 to 175
SMDNTC322520002*	20	2	0.512	3000	<52	>15	-40 to 175
SMDNTC322522002*	22	2	0.563	3000	<52	>15	-40 to 175
SMDNTC322525002*	25	2	0.623	3000	<52	>15	-40 to 175
SMDNTC3225300S5*	30	1.5	0.667	3000	<52	>15	-40 to 175
SMDNTC3225330S5*	33	1.5	0.734	3000	<52	>15	-40 to 175
SMDNTC3225470S5*	47	1.5	1.002	3000	<52	>15	-40 to 175
SMDNTC3225500S5*	50	1.5	1.021	3000	<52	>15	-40 to 175
SMDNTC3225600S5*	60	1.5	1.215	3000	<52	>15	-40 to 175
SMDNTC3225800S2*	80	1.2	1.656	3200	<52	>15	-40 to 175
SMDNTC3225101S1*	100	1.1	2.053	3200	<50	>15	-40 to 175
SMDNTC3225121S1*	120	1.1	2.253	3200	<50	>15	-40 to 175
SMDNTC322520101*	200	1	4.121	3200	<50	>13	-40 to 175

Reliability Testing

No.	Item	Test Method	Standard
1	Vibration	Frequency: 10-55Hz, Amplitude: 0.75mm, Axis: X, Y, Z (2 hrs each)	No visible damage, Resistance change: 10%
2	Solderability	Temperature: 2455C, Time: 30.5s	Uniform tinning, Area 95%
3	Resistance to Soldering Heat	Immersion in 2605C solder for 101s	Resistance change: 10%
4	High Temp. Storage	1252C for 1000+48 hrs, rest 2 hrs	Resistance change: 20%
5	Damp Heat	1) 402C, 90-95% RH for 1000 hrs 2) 402C, 90-95% RH with 1/20 Max Dissipation Voltage (0.5V) for 500 hrs	Resistance change: 20%
6	Thermal Shock	-40C (30min) 25C (5min) 125C (30min) 25C (5min), 5 cycles	Resistance change: 20%
7	Durability Test	1) 255C, Imax, 1000h 2) 255C, Imax, (1min ON /5min OFF) * 1000 times	No visible damage, Resistance change: 20%
8	Insulation Withstand Voltage	750Vac applied for 1 min to surface with wire coil	No external damage

Packaging Specifications

Taped Packaging Dimensions (Unit: mm)

SPEC	Inner Fold (N)							Outer Fold (W)
SPEC	A0	B0	K0	P	P0	P2	T	A0	B0	K0	P	P0	P2	T
Value	6.350.1	8.450.1	3.250.1	8.00.1	4.00.1	2.00.1	0.30.05	6.160.1	11.900.15	3.100.1	8.00.15	4.00.15	2.00.15	0.30.05

Component per Reel: 4000 pcs

15-inch Reel Dimensions (Unit: mm)

SPEC	Inner Fold (N)
SPEC	Value	Value
E0.5	2.3	2.3
F0.5	10.75	10.75
W0.2	16.4	24.4
T10.3	2.2	2.2
T20.3	2.2	2.2
A+0/-2	380	380
N3.0	100	100
D0.3	13.3	13.3

Soldering Instructions

Lead-Free Reflow Soldering Curve:

Soldering Temperature: 230260C
Soldering Time: 1030s
Preheating Temperature: 170C max.

Wave Soldering Curve: (Details not provided in source)

Soldering Iron Rework Conditions:

Item	Condition
Soldering Iron Tip Temperature	400C (max.)
Soldering Time	3.5 sec (max.)
Soldering Iron Power	50W (max.)

Storage Environment

Storage Conditions: Temperature: 10~30C, Relative Humidity: 60% max.
Use within 6 months of delivery.
Solder NTC within 168 hours after opening moisture-proof packaging. Store in original packaging with desiccant and HIC card.
If storage exceeds 6 months or HIC card color changes, bake at 60C for 168 hours before soldering.
Avoid storage in corrosive environments (sulfur, chlorine gas, acid) to prevent pin oxidation and poor solderability.
Store on shelves to avoid moisture and dust.
Avoid thermal shock, vibration, and direct sunlight.

Usage Precautions

Ensure operating ambient temperature is within specified limits.
Install with a minimum 3mm gap from heat-generating or flammable components.
Wear gloves when handling pins.
This specification guarantees product quality as a standalone component. Ensure your product design is validated with the component integrated.
Songtian is not liable for failures caused by exceeding the scope of this specification during customer product trials.
In case of NTC failure resulting in a short circuit, implement fail-safe mechanisms such as fuses to prevent fire hazards.

2508261540_STE-SMDNTC3225N4R704MK0_C50751511.pdf

Company Details

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Business Type:

Manufacturer,Distributor/Wholesaler,Agent,Importer 
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Year Established:

2009 
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Employee Number:

300~500 
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Ecer Certification：

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Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...

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