NEW MTL 761AC SHUNT-DIODE SAFETY BARRIER
| Attribute | Details |
| Product | MTL 761ac Shunt-Diode Safety Barrier |
| Brand | MTL (Measurement Technology Ltd) |
| Model | MTL 761ac |
| BASEEFA No. | Ex 8B2452 |
| Product Type | Zener Shunt-Diode Intrinsic Safety Barrier |
| Function | Limits voltage and current entering a hazardous area by clamping excess energy using Zener diodes and fuses; protects field instruments in explosive atmospheres from dangerous energy levels caused by faults in safe-area equipment; enables intrinsically safe operation of field devices without isolating transformers |
| Barrier Voltage (Voc) | 9V (Terminals 3 & 4 – Hazardous side) |
| Barrier Resistance | 90 Ω |
| Maximum Voltage (Vmax) | 250V r.m.s. (safe area side) |
| Maximum Current (Isc) | ≤ 99 mA |
| Maximum Inductance (La) | ≤ 3.5 mH |
| Maximum Capacitance (Ca) | ≤ 0.4 µF |
| Inductance/Resistance Ratio | La/Ra ≤ 60 µH/Ω |
| Maximum Ambient Temperature | 60°C |
| ATEX Classification | [EEx ia] IIC – Group IIC (Hydrogen) – most stringent classification |
| Entity Parameters – Um | 250V (maximum safe area voltage) |
| Entity Parameters – Uo/Uz | 9V |
| NEC Classification | Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III – Div. 1, caps E, G |
| Terminals | Terminal 3 (Haz +) and Terminal 4 (Haz −) – hazardous area side |
| Mounting Type | DIN rail mount with grey end-stop clips |
| Housing Material | White thermoplastic – compact DIN rail module |
| Wiring | Safe-area connections: terminals 1 & 2 / Hazardous area: terminals 3 & 4 |
| Certification | BASEEFA (Ex 8B2452), UL Approved, ATEX [EEx ia] IIC |
| Standards Compliance | EN 60079-11, IEC 60079-11, BS 5501 Part 1, ANSI/ISA S82.01 |
| Application | Intrinsic Safety Interface for 4–20 mA Transmitters, Thermocouples, RTDs, Switches in ATEX Zone 0/1/2 hazardous areas |
| Suitable For | Offshore Platforms, Refineries, Chemical Plants, Marine Tankers, Gas Processing, Paint Stores, ATEX Zone 0, 1 & 2 |
| Manufacturer | Measurement Technology Ltd (MTL), Luton, Beds., England |
| Country of Origin | England, United Kingdom |
| Condition | New |
| Availability | In Stock |
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