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SD Series SD55R Industrial Surge Protection Device DIN Rail Mounted 55V DC Transmitter Protection
Product Overview
The SD55R is a high-performance surge protection device (SPD) designed to safeguard sensitive electronic equipment and control systems from damaging voltage transients and surges. Manufactured by leading brands including MTL and Weidmuller, this DIN-rail mounted protector is the ideal solution for industrial automation, process control, and communication systems where reliability is critical.
With a compact ultra-slim design, the SD55R delivers multistage hybrid protection circuitry, ensuring your valuable assets remain operational even in harsh electrical environments.
Key Features & Benefits
High Surge Current Capacity: Handles maximum surge currents up to 20kA (8/20 µs waveform), providing robust protection against lightning strikes and power grid fluctuations.
Fast Response Time: Responds to overvoltage events in less than 1 nanosecond, clamping transients before they can damage downstream equipment.
High Bandwidth (50 MHz): Features a wide bandwidth design, making it suitable for high-frequency signal lines without signal degradation.
DIN Rail Mounting: Engineered for standard top-hat rail (DIN rail) and G-rail installation, allowing for quick integration into existing electrical cabinets with minimal space usage.
ATEX Certified: Available with intrinsically safe certification for use in potentially explosive atmospheres (specific variants).
10-Year Product Warranty: Backed by industry-leading reliability and manufacturer warranty.
Technical Specifications
Parameter
Value
Manufacturer
MTL / Weidmuller
Nominal Voltage (DC)
55 V
Nominal Voltage (AC)
38 V
Nominal Current
400 mA
Maximum Surge Current (8/20 µs)
20 kA
Nominal Discharge Current
3 kA
Signal Bandwidth
0 - 50 MHz
Series Resistance
10 Ω / line
Voltage Protection Level (Up)
< 90 V (at 1kV/µs)
Mounting Type
DIN Rail (Top Hat Rail / G-rail)
Product Status
Active, RoHS Compliant, Lead-free
Source: Technical datasheets
Applications
The SD55R is specifically designed to protect critical components in various sectors:
Industrial Automation: Protects PLCs, DCS systems, sensors, and actuators from inductive load switching transients.
Process Control (I/O): Safeguards 2-wire and 3-wire transmitters, RTDs, and field wiring in refineries and chemical plants.
Telecommunications: Ensures signal integrity for communication equipment, servers, and data lines operating at high frequencies.
Power Generation: Shields substation relays and monitoring equipment from lightning-induced surges.
Why Choose the SD55R?
Unlike standard surge protectors that degrade signal quality, the SD55R's low capacitance and high-bandwidth design ensures that your data or control signals pass through unaffected until a surge occurs. Its ultra-slim footprint allows for high packing density on the DIN rail, saving valuable cabinet space.
Ordering Information
Part Number: SD55R
Alternative Cross-References: MTL SD55R, Weidmuller SD55R
Packaging: Single unit (1 piece minimum order quantity)
Shipping: In-stock items ready for immediate dispatch via DHL, FedEx, UPS, or TNT (2-5 days delivery)
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Distributor/Wholesaler,Exporter,Seller,Manufacturer,Trading Company
Year Established:
2013
Total Annual:
2000000-5000000
Employee Number:
20~50
Ecer Certification:
Verified Supplier
Shenzhen Hengyo Power Technology Co., Limited is your best partner for industrial automation. We provide ideal design and solution for automated industries with products from different international brands like MTL, PEPPERL+FUCHS, Phoenix Contact, Weidmueller, Honeywell, Max, Tamagawa, Delta, Panaso... Shenzhen Hengyo Power Technology Co., Limited is your best partner for industrial automation. We provide ideal design and solution for automated industries with products from different international brands like MTL, PEPPERL+FUCHS, Phoenix Contact, Weidmueller, Honeywell, Max, Tamagawa, Delta, Panaso...