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{"title":"Pepperl+Fuchs K-LB-1.30G 30V Intrinsically Safe Surge Protection Barrier with","imgUrl":"https:\/\/img.chinax.com\/nimg\/f0\/9f\/b59d59c0ecc5ab5a662b72b31937-200x200-1\/pepperl_2bfuchs_k_lb_1_30g_30v_intrinsically_safe_surge_protection_barrier_with_20ka_surge_current_and_sil_3_certification.jpg","attrs":{"Brand Name":"PEPPERL+FUCHS","Model Number":"K-LB-1.30G","Place of Origin":"Singapore","Minimum Order Quantity":"1"}}
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
Parameter
Value
Manufacturer
Eaton (MTL)
Model
SD55X
Part Number
SD55X
Nominal Voltage (Un)
55 V DC / 38 V AC
Max Continuous Voltage (Uc / MCOV)
62 V
Nominal Current (In)
400 mA
Series Resistance
2.2 Ω per line (Low Resistance variant)
Max Leakage Current
5 µA
Voltage Protection Level (Up)
< 90 V @ 1 kV/µs
Residual Voltage @ Isn
100 V
Max Surge Current (Imax)
20 kA (8/20 µs)
Nominal Discharge Current (Isn)
3 kA (8/20 µs)
Response Time
< 1 ns
Bandwidth
25 kHz
Mounting
35 mm DIN Rail (top hat rail)
Operating Temperature
-40°C to +80°C
Certifications
ATEX (Ex ia), IECEx (pending region)
Warranty
10 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
Attribute
Value
Product Type
Surge Protective Device (SPD)
Brand
Eaton (MTL / MTL Instruments)
Model
SD55X
Category
Type 2 / Type 1 (DIN rail)
Nominal Voltage DC
55 V
Nominal Voltage AC
38 V
Max Continuous Voltage (Uc)
62 V
Nominal Current
400 mA
Series Resistance
2.2 Ω/line
Max Surge Current (8/20 µs)
20 kA
Nominal Discharge Current (8/20 µs)
3 kA
Response Time
< 1 ns
Bandwidth
25 kHz
Mounting
DIN Rail (35 mm)
Degree of Protection
IP20
Operating Temperature
-40°C to +80°C
Certifications
ATEX, IECEx
Warranty
10 years
Competitor Comparison
Feature
MTL SD55X
Pepperl+Fuchs K-LB-2.30
Voltage (Uc)
62V
30V
Current
400mA
250mA
Resistance
2.2Ω
0.5Ω
Bandwidth
25kHz
Higher (for HART)
Best For
Higher voltage loops, ATEX
Low 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.
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
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