MTL7715+ Eaton MTL Relay Output Zener Barrier
The MTL7715+ is a high-performance 1-channel shunt-diode safety barrier (Zener barrier) from Eaton's Crouse-Hinds series MTL7700 range, specifically engineered for low-voltage AC and DC systems 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 safety description of 15V, 100 Ω, 150mA, working voltage of 6V DC and 4V AC, and positive polarity configuration, the MTL7715+ is the ideal solution for protecting low-voltage sensors, switches, and instrumentation in Zone 0, 1, and 2 hazardous locations (gas groups IIC, IIB, IIA).
Specifically designed for 6V DC and 4V AC systems
Designed for positive ground applications
Certified for the most hazardous IIC gas groups
Unique feature for easy cabling and maintenance
Reduces cabling requirements with MTL7798 module
Two stages of pulse-tested Zener diodes for reliability
| Parameter | Value |
|---|---|
| Manufacturer | Eaton (Crouse-Hinds series MTL) |
| Series | MTL7700 Range |
| Product Model | MTL7715+ |
| Number of Channels | 1 (single-channel) |
| Polarity | Positive (+) |
| Safety Description | 15 V, 100 Ω, 150 mA |
| Rated Supply Voltage DC | 6 V DC |
| Rated Supply Voltage AC | 4 V AC |
| Gas Groups | IIC, IIB, IIA |
| Zones | Zone 0, 1, 2 |
| Width | 12.6 mm |
| Operating Temperature | -20°C to +60°C |
Note: TIIS certification expired July 2, 2024. New installations in Japan should verify current certification status.
The MTL7715+ is specifically designed for low-voltage system protection in hazardous area installations:
- Oil & Gas: Low-voltage sensor monitoring on offshore platforms
- Chemical Processing: 6V DC and 4V AC circuit protection
- Pharmaceutical: Low-voltage sensor isolation for batch processing
- Power Generation: Turbine monitoring systems
- Factory Automation: Low-voltage proximity sensor protection
- Marine & Offshore: Marine control systems requiring intrinsic safety
- Mounting: Standard 35 mm T-section DIN rail (EN 60715)
- Terminals: Removable screw terminals, colour-coded
- Grounding: High-integrity earth connection via DIN rail
- Wire Entry: Angled for limited space enclosures
- Terminal Capacity: Conductors up to 2.5 mm²
| Model | Description |
|---|---|
| MTL7715+ | 15V, 100 Ω, 150mA - 1-channel, positive polarity, 6V DC/4V AC |
| MTL7715P+ | Same function with power bus capability |
| MTL7706+ | 28V, 300Ω, 93mA - higher voltage applications |
| MTL7798 | Power Feed Module for bussed power distribution |
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