MachineU > China Products > Electrical Equipment & Supplies > Low Voltage Products > Surge Protection Device
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity
Specifications
Brand Name :
MTL
Model Number :
SD55X
Place of Origin :
India
MOQ :
1
Price :
Negotiable
Payment Terms :
T/T,Western Union
Supply Ability :
500pcs/month
Delivery Time :
ship out immediately after payment received
Packaging Details :
original package
Certification :
CE
Condition :
original brand new
Warranty :
one year
Series :
Eaton Crouse-Hinds series
Shipping way :
DHL FedEx express
Application :
Automation Industries, oil, gas, chemical industries
Certificate :
CE ISO TUV
Description
MTL SD55X Surge Protector | 55V Low Resistance Intrinsically Safe SPD
The Eaton MTL SD55X is a high-performance surge protection device (SPD) from the industry-leading MTL SD range. Engineered specifically for 55V DC / 38V AC applications, this module provides robust protection against transient overvoltages caused by lightning strikes and switching events. With its ultra-slim DIN rail design, low series resistance (2.2Ω), and ATEX intrinsic safety certification, the SD55X is the ideal choice for safeguarding critical process instrumentation, including 4-20mA loops, thermocouples, emergency shutdown (ESD) systems, and fire & gas detectors.
Why the MTL SD55X Stands Out
Unlike general-purpose protectors, the SD55X is purpose-built for industrial signal lines where signal integrity is paramount. Its low-resistance design ensures minimal impact on loop-powered devices, while the hybrid multi-stage suppression circuitry provides fail-safe protection without degrading your process measurements.
Key Features & Benefits
  • ATEX Intrinsically Safe (IS) Certified: Certified for use in hazardous area applications (Ex ia), allowing direct installation into potentially explosive atmospheres without additional barriers.
  • Ultra-Slim Footprint (12.5mm): The space-saving design maximizes cabinet density, allowing you to protect more channels per DIN rail. Modules can "double-up" as feedback terminals to reduce wiring complexity.
  • Exceptional Surge Capacity (20kA): Handles maximum surge current of 20kA (8/20µs) and nominal discharge current of 3kA, providing reliable protection against direct and indirect lightning strikes.
  • Low Series Resistance (2.2 Ω per line): Unlike standard SD55 models (4.2Ω), the SD55X variant offers significantly lower resistance, making it the preferred choice for low-power loops where voltage drop must be minimized.
  • Fast Response Time (<1ns): Responds to transients in under 1 nanosecond, clamping overvoltages before they can damage sensitive PLC, DCS, or SIS I/O cards.
  • High Current Handling (400mA): Supports nominal current up to 400mA, suitable for a wide range of loop-powered and separately powered field devices.
  • HART Transparent: The 25kHz bandwidth ensures seamless compatibility with HART communication protocols, allowing digital signals to pass without attenuation.
  • 10-Year Product Warranty: Backed by Eaton MTL's industry-leading warranty for long-term reliability and peace of mind.
Technical Specifications
ParameterValue
ManufacturerEaton (MTL)
ModelSD55X
Part NumberSD55X
Nominal Voltage (Un)55 V DC / 38 V AC
Max Continuous Voltage (Uc / MCOV)62 V
Nominal Current (In)400 mA
Series Resistance2.2 Ω per line (Low Resistance variant)
Max Leakage Current5 µA
Voltage Protection Level (Up)< 90 V @ 1 kV/µs
Residual Voltage @ Isn100 V
Max Surge Current (Imax)20 kA (8/20 µs)
Nominal Discharge Current (Isn)3 kA (8/20 µs)
Response Time< 1 ns
Bandwidth25 kHz
Mounting35 mm DIN Rail (top hat rail)
Operating Temperature-40°C to +80°C
CertificationsATEX (Ex ia), IECEx (pending region)
Warranty10 years
Applications
  • Process Industries: Protection of 4-20mA analog input/output cards in PLC, DCS, and SIS systems.
  • Oil & Gas: Thermocouple and RTD temperature measurements, fire & gas detection systems.
  • Chemical & Pharmaceutical: Emergency shutdown (ESD) systems and solenoid valve control circuits.
  • Power Generation: Vibration monitoring sensors (with SD32T3 for 3-wire applications).
SD55X vs. SD55: Which One Do You Need?
The SD55X is the low-resistance variant (2.2Ω) of the standard SD55 (4.2Ω). Choose the SD55X when:
  • You need to minimize voltage drop in loop-powered 4-20mA circuits.
  • Your application requires higher current handling (400mA vs 250mA).
  • You do NOT need the fuse-disconnect feature (the SD55 includes a fuse for loop isolation).
Why Choose the MTL SD55X?
The MTL SD range is globally recognized as the gold standard for signal line surge protection. With its hybrid circuit design, ultra-high packing density, and ATEX certification, the SD55X delivers uncompromising protection without compromising signal integrity. Whether you are upgrading an existing control system or designing a new greenfield facility, the SD55X provides the reliability and performance required for critical safety and process applications.
Technical Data Sheet
AttributeValue
Product TypeSurge Protective Device (SPD)
BrandEaton (MTL / MTL Instruments)
ModelSD55X
CategoryType 2 / Type 1 (DIN rail)
Nominal Voltage DC55 V
Nominal Voltage AC38 V
Max Continuous Voltage (Uc)62 V
Nominal Current400 mA
Series Resistance2.2 Ω/line
Max Surge Current (8/20 µs)20 kA
Nominal Discharge Current (8/20 µs)3 kA
Response Time< 1 ns
Bandwidth25 kHz
MountingDIN Rail (35 mm)
Degree of ProtectionIP20
Operating Temperature-40°C to +80°C
CertificationsATEX, IECEx
Warranty10 years
Competitor Comparison
FeatureMTL SD55XPepperl+Fuchs K-LB-2.30
Voltage (Uc)62V30V
Current400mA250mA
Resistance2.2Ω0.5Ω
Bandwidth25kHzHigher (for HART)
Best ForHigher voltage loops, ATEXLow voltage precision loops
Google Shopping Tips
  • Negative Keywords: Exclude "SD55" (non-X variant) if you only stock the X version, or clarify the difference in your listing.
  • Use Case Keywords: Target industrial hubs with terms like ESD system protection, thermocouple surge protector, fire and gas detector SPD.
Send your message to this supplier
Send Now

Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity

Ask Latest Price
Product Detail
Brand Name :
MTL
Model Number :
SD55X
Place of Origin :
India
MOQ :
1
Price :
Negotiable
Payment Terms :
T/T,Western Union
Contact Supplier
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity
Eaton MTL SD55X 55V Low Resistance Intrinsically Safe Surge Protector with 20kA Surge Capacity

Shenzhen Hengyo Power Technology Co., Limited

Verified Supplier
1 Years
shenzhen
Since 2013
Business Type :
Distributor/Wholesaler, Exporter, Seller, Manufacturer, Trading Company
Main Products :
AC Servo Motor, Panasonic AC Servo Motor, AC Servo Driver
Total Annual :
2000000-5000000
Employee Number :
20~50
Certification Level :
Verified Supplier
Discover similar products
View More

Find Similar Products By Category:

Supplier Homepage Products Surge Protection Device
MachineU China Products Electrical Equipment & Supplies Low Voltage Products Surge Protection Device
Contact Supplier
Submit Requirement