MTL SD32 Surge Protection Device with 20kA Surge Capacity Ultra-Slim 7mm Design and Integrated Fuse/Disconnect for Process Control

Name: MTL SD32 Surge Protection Device with 20kA Surge Capacity Ultra-Slim 7mm Design and Integrated Fuse/Disconnect for Process Control
Brand: Shenzhen Hengyo Power Technology Co., Limited
SKU: SD32
Availability: InStock

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MTL SD32 Surge Protection Device with 20kA Surge Capacity Ultra-Slim 7mm Design and Integrated Fuse/Disconnect for Process Control

Large Image : MTL SD32 Surge Protection Device with 20kA Surge Capacity Ultra-Slim 7mm Design and Integrated Fuse/Disconnect for Process Control

Product Details:

Place of Origin:	INDIA
Brand Name:	EATON
Certification:	CE UL ROSH
Model Number:	SD32

Payment & Shipping Terms:

Minimum Order Quantity:	5
Price:	Negotiable
Packaging Details:	original package
Delivery Time:	ship out immediately upon payment received
Payment Terms:	T/T,Western Union
Supply Ability:	500pcs/month

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MTL SD32 Surge Protection Device with 20kA Surge Capacity Ultra-Slim 7mm Design and Integrated Fuse/Disconnect for Process Control

Description

Condition:

Eaton Original Brand New

Warranty:

One Year

Application:

Oil, Gas, Chemical Industry

Shipping Way:

FedEx DHL

Highlight:

Eaton SD32 surge protector

SD Series surge protection device

MTLSD32 Eaton surge protector

MTL SD32 Signal Surge Protection Device – DIN Rail Mount 32VDC Fuse Disconnect MTL 32V Surge Arrester for Process Control Systems

Product Overview

The MTL SD32 is a high-performance surge protection device (SPD) from Eaton's Crouse-Hinds MTL SD Series, specifically engineered for protecting 2-wire 4-20mA loops, digital outputs, alarms, LEDs, and solenoid valves in industrial process control systems. This ultra-slim DIN rail mount module uniquely combines hybrid surge protection with an integrated fuse/disconnect facility, providing both transient overvoltage protection and convenient circuit isolation in a single 7mm-wide unit.

The SD32 is part of the industry-leading MTL SD Series—a comprehensive range of surge protection devices offering unparalleled packing densities, application versatility, proven reliable hybrid circuitry, and simple installation. These features establish the series as the ultimate surge protection solution for process equipment, I/O systems, and communications networks.

Key Features

Integrated Fuse/Disconnect Facility

The SD32 distinguishes itself by incorporating a fuse/disconnect package that provides fused protection against fault currents and a convenient method of isolating field circuitry without needing additional disconnect terminals. Includes a third connection for safe screen termination to earth.

Ultra-Slim Space-Saving Design

With an exceptionally slim 7mm width, the SD32 allows for high packing densities on DIN rails. Individual modules can "double-up" as feed-through terminals, maximizing cabinet space utilization and reducing overall panel footprint.

Proven Hybrid Protection Circuitry

Employs advanced multistage hybrid technology combining high-energy gas discharge tubes, varistors, and transient voltage suppression diodes. Delivers characteristically low let-through voltages while maintaining high surge current handling capability of 20kA maximum surge current.

Hazardous Area Certified

ATEX and IECEx certified for use in potentially explosive atmospheres, making it suitable for gas and dust hazardous area installations in oil & gas, chemical, pharmaceutical, and mining facilities.

Technical Specifications

Parameter	Value
Model	SD32
Manufacturer	Eaton MTL (Crouse-Hinds series)
Series	SD Series
Nominal Voltage (DC)	32 V
Nominal Voltage (AC)	22 V
Nominal Current (In)	250 mA
Maximum Surge Current (8/20 µs)	20 kA
Nominal Discharge Surge Current (Isn)	3 kA (8/20µs)
Response Time	<1 ns
Series Resistance	4.2 Ω/line
Maximum Leakage Current	5 µA
Maximum Continuous Operating Voltage (MCOV/Uc)	36 V
Voltage Protection Level (Up) @1kV/ µs	<45 V
Residual Voltage @Isn	60 V
Bandwidth (fG)	25 kHz
Number of Terminals	3 terminals (field + safe side with screen connection)
Mounting Type	DIN rail (35mm top-hat rail)
Dimensions (W x H x D)	7mm x 101.3mm x 99mm
Operating Temperature	-40°C to +80°C
Protection Type	Full hybrid line-to-line; each line to screen/ground
Warranty	10-year limited warranty
Country of Origin	India

Certifications & Compliance

Certification	Status	Details
ATEX	Certified	Intrinsically safe surge protectors
IECEx	Certified	Hazardous area certification
UL	Certified	UL E220693
SIL 3	Compliant	Suitable for safety instrumented systems
CSA	Certified	For North American installations
CCC	Certified	China Compulsory Certification
KOSHA	Certified	Korea certification
EAC	Certified	Eurasian Conformity
RoHS	Compliant	Restriction of Hazardous Substances

Applications

Application Area	Specific Use Cases
Process Control	2-wire 4-20mA transmitters (pressure, temperature, flow, level)
Discrete I/O	Digital (on/off) outputs, alarms, LEDs
Actuator Control	Solenoid valves
Safety Systems	Emergency shutdown (ESD) systems
Fire & Gas Detection	Fire detectors, gas detectors
Shut-Down Systems	Critical process safety loops
Hazardous Areas	Oil & gas, chemical, pharmaceutical, mining facilities

The SD32 is particularly well-suited for applications requiring both surge protection and circuit isolation capabilities in a single compact unit.

SD Series Model Comparison

Model	Terminals	Current Rating	Resistance	Key Feature	Application
SD32	3	250 mA	4.2 Ω	Fuse disconnect + screen connection	Process I/O needing isolation
SD32X	2	400 mA	2.2Ω	Low resistance	4-20mA loops (no isolation needed)
SD32R	2	400 mA	-	High bandwidth	High speed data links, RS485
SD32T3	3	400 mA	2.2Ω	3-wire protection	3-wire transmitters, vibration sensors
SDRTD	3	400 mA	-	RTD optimized	PT100/RTD temperature sensors
SD150X	2	-	-	High current	110-240V AC power supplies

Note: The SD32 is the only model in the series that combines fuse/disconnect capability with screen termination. For 3-wire applications requiring higher current capacity (400mA), consider the SD32T3.

Installation Guidelines

Mounting Instructions:

Snap the SD32 onto standard 35mm top-hat DIN rail until it clicks securely into place
Ensure proper grounding through the DIN rail (automatic when mounted on grounded rail)
The ultra-slim 7mm footprint allows high-density side-by-side mounting

Wiring Instructions:

The SD32 features three terminals on both field and safe sides:

Terminal 1: Loop positive (+) from field side
Terminal 2: Loop negative (-) from field side
Terminal 3: Screen/shield termination to earth

Important Notes:

The device connects in series with the protected circuit
Series resistance of 4.2Ω is added to the loop
The third terminal provides safe screen termination without additional components
Use the disconnect feature for maintenance without rewiring
Follow local electrical codes for proper installation

Why Choose MTL SD32?

Eaton MTL Reliability - Globally recognized leader in intrinsic safety and surge protection for industrial process control
Most Compact Fuse-Disconnect Protector - At just 7mm wide, offers the highest packing density on the market
Hazardous Area Approved - ATEX and IECEx certification allows installation in Zone 2 hazardous areas
All-in-One Solution - Eliminates need for separate disconnect terminals and screen termination components
10-Year Warranty - Backed by Eaton MTL's industry-leading long-term reliability assurance
Backward Compatible - Part of the SD Series platform for easy integration with existing installations

Ordering Information

Product	Part Number	Availability
MTL SD32 Surge Protector	SD32	In stock - authorized distributors

Alternate Part Numbers: SD32MXX-BCN (RS Stock No.: 144-8697)

Supplier Standard Pack: 15 units

Lead Time: Please contact local authorized Eaton MTL distributors for current availability

Warranty: 10-year manufacturer's warranty

Summary

The MTL SD32 Surge Protector delivers reliable, high-performance protection for 2-wire 4-20mA loops and discrete I/O circuits in industrial process control systems. With its 20kA surge capacity, <1ns response time, integrated fuse/disconnect facility, ultra-slim 7mm footprint, and hazardous area certifications, the SD32 is the ideal choice for engineers seeking to protect critical instrumentation while maintaining convenient circuit isolation capabilities.

Key advantages at a glance:

Integrated fuse/disconnect - No need for separate disconnect terminals
Screen termination - Third terminal for safe shield grounding
20kA surge capacity - Handles severe transient events
<1ns response time - Instantaneous protection
Ultra-slim design - 7mm width for high packing density
ATEX & IECEx certified - Suitable for hazardous areas
SIL 3 compliant - For safety instrumented systems
Simple DIN rail mounting - Quick and secure installation
10-year warranty - Long-term reliability assurance
25kHz bandwidth - Suitable for standard process signals

Protect your process I/O with MTL SD32 - the all-in-one surge protection and isolation solution for harsh and hazardous environments.

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

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Oscar

United States Dec 24.2025

Helpful (92)

the best seller!

Ejiro

Nigeria Mar 6.2019

Helpful (58)

The vendor representative, Mitchell, is an awesome lady as she ensured that the order was delivered promptly to my location. Beyond that, she stood by me with all technical details to resolve issues I had on the machine. I couldn’t have had better services than this. Thank you Mitchell. Ejiro.