This datasheet provides detailed information on the Schrack Multimode Relay MT series, including dimensions, pinouts, functions, specifications, etc.
The Tyco Multimode Relay MT series includes DIN‑rail and PCB‑mounted sockets such as MT 78 750, MT 78 755, MT 78 760, MT 78 740, MT 78 745 and MT 78 602/603/612/613. The document provides detailed part numbers, mounting methods (snap‑on, screw, Pozidriv), and accessories like retaining clips, LEDs, and function modules.
Key technical data are listed for each variant, including rated current, voltage ratings, dielectric strength, clearance/creepage distances, insulation class, RoHS compliance, degree of protection (IP20), ambient temperature ranges, terminal torque, insertion cycles, and weight. Approvals and compliance statements reference IEC standards and EU RoHS directives.
| Rated voltage / max switching voltage | AC 240/400 VAC |
|---|---|
| Dielectric strength (coil‑contact) | 2500 Vims |
| Open contact circuit voltage | 1800 Vims |
| Adjacent contact circuit voltage | 2800 Vims |
| Clearance / creepage (coil‑contact) | 2.8 mm / 4 mm |
| Rated insulation voltage | 250 V |
| Pollution degree | 2 |
| Degree of protection | IP20 (DIN 40050) |
| Ambient temperature range (DIN‑rail sockets) | -20 °C … +80 °C |
| Terminal screw torque | 0.8 Nm (max 1.0 Nm) |
| Insertion cycles | 10 |
| Max insertion force | 100 N |
| RoHS compliance | Directive 2002/95/EC |
The MT relays are rated for AC 240/400 V as the maximum switching voltage.
Yes, the MT relays comply with the RoHS Directive 2002/95/EC.
The relays have a protection rating of IP20 according to DIN 40050.
The terminal screw torque should be 0.8 Nm, not exceeding 1.0 Nm.