Eaton MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved for Hazardous Areas

Name: Eaton MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved for Hazardous Areas
Brand: Shenzhen Hengyo Power Technology Co., Limited
SKU: MTL7764AC
Availability: InStock

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Eaton MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved for Hazardous Areas

Large Image : Eaton MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved for Hazardous Areas

Product Details:

Place of Origin:	England
Brand Name:	Eaton
Certification:	CE
Model Number:	MTL7764AC

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	negotiable
Packaging Details:	original package
Delivery Time:	In stock
Payment Terms:	T/T,Western Union
Supply Ability:	500pcs/month

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Eaton MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved for Hazardous Areas

Description

Condition:

MTL Original Brand New

Warranty:

One Year

Application:

Oil Gas Chemical Industry

Shipping Way:

DHL FedEx

Highlight:

MTL Zener safety barrier isolator

intrinsic safety barrier with warranty

MTL7764AC Zener barrier isolator

Eaton MTL MTL7764AC Zener Safety Barrier 12V 1000Ω ATEX Approved Hazardous Area

Product Overview

The MTL7764AC is a high-performance shunt-diode safety barrier (Zener barrier) from Eaton's Crouse-Hinds series MTL7700 range, specifically engineered for strain-gauge bridge circuits, load cells, and Wheatstone bridge applications requiring intrinsic safety protection in hazardous areas.

This passive device limits the voltage and current that can reach a hazardous area under fault conditions, preventing ignition of flammable atmospheres. With a rated voltage of 12 V, end-to-end resistance of 1,000 Ω, and maximum current of 12 mA, the MTL7764AC is the ideal solution for protecting sensitive strain-gauge based measurement equipment in Zone 0, 1, and 2 hazardous locations (gas groups IIC, IIB, IIA).

The device features a compact 12 mm width and standard DIN rail mounting for easy integration into existing control cabinets.

Model Number Decoding: MTL7764AC

Code Segment	Meaning
MTL	MTL Instruments Group (now Eaton)
77	MTL7700 series — Shunt-diode safety barriers
64	Specific barrier configuration for strain-gauge bridges
AC	AC/DC compatible — suitable for both AC and DC circuits

The "AC" suffix indicates compatibility with AC circuits, distinguishing it from polarity-sensitive models.

Key Features & Benefits

Strain-Gauge Bridge Optimization: Specifically designed for strain-gauge bridge circuits and load cell applications

12 V Working Voltage: Provides safe voltage limiting for strain-gauge bridge circuits

1,000 Ω End-to-End Resistance: Matches impedance requirements of typical strain-gauge bridge circuits

12 mA Maximum Current: Adequate current handling for strain-gauge bridge excitation

AC/DC Compatibility: Suitable for both AC and DC circuits — no polarity concerns

Ultra-Slim DIN Rail Mounting: Compact 12 mm width saves valuable panel space

High Accuracy Signal Transfer: Minimal signal distortion for sensitive measurements

Multiple International Approvals: ATEX, TIIS, and Factory Mutual certifications

Technical Specifications

General Specifications

Parameter	Value
Manufacturer	Eaton (Crouse-Hinds series MTL)
Series	MTL7700 Range
Product Model	MTL7764AC
Alternative Part Number	5710-032-006
Product Type	Shunt-Diode Safety Barrier (Zener Barrier)

Electrical Ratings

Parameter	Value
Working Voltage (Vwkg)	12 V
Maximum Current	12 mA
End-to-End Resistance	1,000 Ω
Resistance Tolerance	±10 %
Fuse Rating	50 mA
Number of Channels	1 (single-channel)
Polarity	AC (non-polarized)

Hazardous Area Specifications

Parameter	Value
Gas Groups	IIC, IIB, IIA
Zones	Zone 0, 1, 2
Safety Description	12 V, 1,000 Ω, 12 mA

Mechanical Specifications

Parameter	Value
Width	12 mm
Height	86 mm
Length/Depth	105 mm
Weight	100 g / 0.121 kg
Enclosure Material	Polycarbonate
Mounting	DIN rail (35 mm)
Terminals	Screw terminals

Function Description

The MTL7764AC is a passive shunt-diode safety barrier that operates on the Zener barrier principle. It limits both voltage and current that can be delivered to a hazardous area circuit under fault conditions.

How it works:

Voltage limiting: Zener diodes clamp the output voltage to a safe level (12 V) if the safe-area voltage rises above normal operating levels
Current limiting: A series resistor (1,000 Ω) limits fault current to a safe value (12 mA)
Fusing: Internal 50 mA fuses provide backup protection under severe fault conditions
Grounding: The barrier requires a connection to a high-integrity earth ground to function properly

Typical strain-gauge bridge configuration:

The MTL7764AC is typically used in conjunction with other MTL barriers for complete strain-gauge bridge protection:
- MTL7761ac: Provides bridge excitation power (14 V, 230 Ω source)
- MTL7764ac: Used to sense the bridge supply voltage
- MTL7766Pac: Provides 12.3 V for 350 Ω bridges with 20 V supply
For load cells with resistance between 350 Ω and 800 Ω, the MTL7764AC provides safe excitation and signal conditioning

Load cell application note:
The MTL7764AC is approved by Factory Mutual for use with 1 to 4 load cells in a clear covered polycarbonate junction box. The indicator can have excitation voltage of 10 to 20 V DC and must have remote sense ability. Load cells with Wheatstone bridge circuits are classified as "Non-energy Storing Simple Apparatus" (per ANSI/ISA-RP12.6) requiring no additional approvals when connected to certified intrinsic safety barriers.

Applications

The MTL7764AC is specifically designed for strain-gauge and load cell applications in hazardous area installations:

Industry	Application
Oil & Gas	Tank level measurement using load cells on storage tanks in Zone 0/1 areas
Chemical Processing	Vessel weighing systems, hopper scales, and silo level monitoring
Pharmaceutical	Batch weighing systems for solvent handling equipment requiring Ex protection
Mining	Conveyor belt weighing systems, bin level monitoring
Food & Beverage	Tank weighing for flammable liquid storage (spirits, oils)
Marine & Offshore	Cargo tank monitoring, mooring line tension measurement

Typical field devices connected:

Strain-gauge bridge sensors (full Wheatstone bridge configuration)
Load cells (350 Ω to 800 Ω resistance)
Torque sensors
Pressure sensors based on strain-gauge technology
Weighing systems in hazardous areas

Why Choose the MTL7764AC?

Optimized for Strain-Gauge Bridges
Unlike general-purpose safety barriers, specifically designed for strain-gauge bridge circuits and load cells

AC/DC Flexibility
Non-polarized operation eliminates wiring errors and simplifies installation

Proven MTL7700 Series Reliability
Industry standard for shunt-diode safety barriers for decades

Global Approvals
Certified for use in major industrial markets worldwide

Simple Installation
DIN rail mounting, clearly labeled terminals, and compact design

Load Cell System Compatibility
Factory Mutual approved for use with 1 to 4 load cells

MTL7764AC vs. Related MTL7700 Series Models

Model	Working Voltage	Current	Resistance	Polarity	Application
MTL7764AC	12 V	12 mA	1,000 Ω	AC	Strain-gauge bridges, load cells
MTL7760ac	7 V	72 mA	85 Ω	AC	General purpose AC circuits
MTL7761ac	10 V	93 mA	300 Ω	AC	AC circuits, general purpose
MTL7761Pac	10 V	93 mA	300 Ω	AC	Power bus version
MTL7765ac	12 V	93 mA	300 Ω	AC	AC circuits, higher current
MTL7766ac	14 V	93 mA	300 Ω	AC	AC circuits, higher voltage
MTL7766Pac	14 V	93 mA	300 Ω	AC	Power bus version, 12.3 V for 350 Ω bridge

Installation Information

Parameter	Detail
Mounting	Standard 35 mm DIN rail (EN 60715)
Terminals	Screw terminals (accepts up to 2.5 mm² wire)
Grounding	Requires high-integrity earth ground connection
Clearance	Minimal — 12 mm width enables high-density installation
Operating Position	Any orientation

Important Installation Notes:

A high-integrity earth ground connection is mandatory for proper Zener barrier operation
Do not install in areas where condensation may occur
The barrier must be installed in a safe area (non-hazardous location)
Maximum cable parameters for IIC gas group apply to field wiring
For load cell applications, ensure the indicator has remote sense capability

Compliance & Certifications

Certification	Status	Details
ATEX	Certified	BAS01 ATEX 7217 — II (1) GD [Ex ia] IIC
TIIS (Japan)	Certified	TC16441 (expired July 2024, renewal available)
Factory Mutual (FM)	Approved	For load cell applications with 1-4 load cells
CSA	Certified	North American approval
RoHS	Compliant	Lead-free
CE	Compliant	EMC Directive

Related Products from MTL7700 Series for Strain-Gauge Applications

Model	Function	Description
MTL7761ac	Excitation Supply	10 V, 300 Ω source for bridge excitation
MTL7764ac	Bridge Sense	12 V, 1,000 Ω, 12 mA — senses bridge supply voltage
MTL7766Pac	Bridge Power	14 V, 300 Ω — provides 12.3 V for 350 Ω bridge
MTL7761Pac	Power Bus Version	Same as MTL7761ac with power bus capability
MTL7706+	Single-Channel Barrier	28 V, 93 mA, 300 Ω — general purpose positive polarity
MTL7787+	Dual-Channel Barrier	28 V, 93 mA, 300 Ω — general purpose positive polarity

The MTL7700 series offers a complete range of shunt-diode safety barriers for all intrinsic safety applications.

Overall Rating

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Oscar

United States Dec 24.2025

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the best seller!

ABDULHADI

Saudi Arabia Dec 16.2020

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منتج ممتاز

Juan

Ecuador Jan 17.2019

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all is ok !!

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