MTL7715P+ Dual Channel Relay Output Intrinsically Safe Zener Barrier DIN Rail Mount
Product Overview
The MTL7715P+ is a high-performance 1-channel shunt-diode safety barrier (Zener barrier) from Eaton's Crouse-Hinds series MTL7700 range, specifically engineered for 12V DC systems and high-current 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 safety description of 15V, 50 Ω, 291mA, the MTL7715P+ offers significantly higher current capability than the standard MTL7715+ (which is rated at 150mA), making it the ideal solution for protecting higher-power 12V DC field devices in Zone 0, 1, and 2 hazardous locations (gas groups IIC, IIB, IIA).
Key Features & Benefits
- High-Current Design: Safety description of 15V, 50 Ω, 291mA – provides significantly higher current capability than the standard MTL7715+ (150mA)
- 12V DC System Optimization: Specifically designed for 12V DC systems – the ideal barrier for higher-power field devices requiring 12V operation
- Low Series Resistance: Only 50 Ω end-to-end resistance – minimizes voltage drop in 12V DC circuits, maximizing available power for field devices
- IIC Gas Group Certification: Certified for the most hazardous IIC gas groups (hydrogen, acetylene) – suitable for use in Zone 0, 1, and 2 explosive atmospheres
- 291mA Maximum Current: Higher current capability suitable for multiple field devices or higher-power loads
- Removable Terminals – UNIQUE: Unique removable terminal blocks for easy cabling, maintenance, and loop disconnect by simply unplugging terminals from the side of the module
- Bussed Power Capability – UNIQUE: Integrated bussed power distribution reduces cabling requirements when used with the MTL7798 power feed module
- Angled Wire Entry: Wire entry is angled to assist wiring within limited space enclosures
- Ultra-Slim DIN Rail Mounting: Compact 12.6 mm width for standard 35 mm T-section DIN rail mounting
- Dual-Stage Protection: Contains two stages of pulse-tested Zener diodes and an 'infallible' terminating resistor for maximum reliability
- Global Approvals: ATEX, IECEx, UL, CSA certifications for international installation flexibility
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Eaton (Crouse-Hinds series MTL) |
| Series |
MTL7700 Range |
| Product Model |
MTL7715P+ |
| Product Type |
Zener Barrier (Shunt-Diode Safety Barrier) |
| Number of Channels |
1 (single-channel) |
| Polarity |
Positive (+) |
| Typical Application |
12V DC systems |
Electrical Ratings
| Parameter |
Value |
| Safety Description |
15 V, 50 Ω, 291 mA |
| End-to-End Resistance (Max) |
64 Ω |
| Terminal Voltage @ 10 µA |
12.6 V (min) |
| Terminal Voltage @ 20mA |
13.7 V (max) |
| Fuse Rating |
100 mA |
| Maximum Safe Area Voltage (Um) |
250 V AC/DC |
| Maximum Output Voltage (Uo) |
15.0 V |
| Maximum Output Current (Io) |
0.291 A |
| Maximum Output Power (Po) |
1.09 W |
Mechanical Specifications
| Parameter |
Value |
| Width |
12.6 mm / 13 mm |
| Height |
90 mm / 87 mm |
| Depth/Length |
105 mm / 106 mm |
| Weight |
0.100 kg - 0.120 kg |
| Enclosure Material |
Polycarbonate |
| Mounting |
35 mm T-section DIN rail (EN 60715) |
Applications
The MTL7715P+ is specifically designed for 12V DC high-current system protection in hazardous area installations across various industries:
- Oil & Gas: 12V DC sensor and actuator protection on offshore platforms and refineries
- Chemical Processing: Higher-power 12V DC control circuits in explosive atmospheres
- Pharmaceutical: 12V DC batch processing equipment requiring Ex ia IIC certification
- Factory Automation: 12V DC actuator and solenoid protection in hazardous locations
- Power Generation: Turbine control systems with 12V DC I/O requiring higher current
- Marine & Offshore: Marine control systems requiring intrinsic safety certification
Why Choose the MTL7715P+?
High-power 12V DC design with 291mA current capability, low 50Ω series resistance, unique removable terminals, bussed power capability, and global certifications including ATEX, IECEx, UL, and CSA.
Ordering Information
Part Number:
MTL7715P+
Brand:
Eaton (Crouse-Hinds series MTL)
Product Family:
MTL7700 Range – Zener Barriers
Country of Origin:
India
Condition:
New, Original, Factory Sealed