The 5-Pin Electromechanical Relay is a general-purpose SPDT (Single Pole Double Throw) relay designed for electromagnetic switching applications. It features a 12 V DC coil, COM/NO/NC contact arrangement, electrically isolated coil and contacts, and 5-pin configuration with coil terminals 85 and 86 and contact terminals 30, 87 and 87a. It is suitable for load switching, alarm, motor, lamp, fan and control circuits.
| Relay Type | 5-Pin Electromechanical Relay |
| Contact Configuration | SPDT / Changeover |
| Number of Pins | 5 |
| Coil Voltage | 12 V DC (typical) |
| Coil Resistance | Typically approx. 80–100 Ω for a 12 V relay |
| Contact Rating | Up to 30 A / 40 A, depending on model |
| Contact Arrangement | COM, NO, NC |
| Coil Terminals | 85, 86 |
| Contact Terminals | 30, 87, 87a |
| Operating Mode | Electromagnetic switching |
| Insulation | Coil electrically isolated from contacts |
| Application | Load switching, alarm, motor, lamp, fan and control circuits |
| Pin 85 | Coil − — Relay coil negative / ground |
| Pin 86 | Coil + — Relay coil positive supply |
| Pin 30 | COM — Common contact / switched input |
| Pin 87 | NO — Normally Open contact |
| Pin 87a | NC — Normally Closed contact |
| Relay OFF Operation | COM (30) is connected to NC (87a) |
| Relay ON Operation | COM (30) changes over and connects to NO (87) |
| Relay Type | 5-Pin Electromechanical Relay |
| Contact Configuration | SPDT / Changeover |
| Number of Pins | 5 |
| Coil Voltage | 12 V DC (typical) |
| Coil Resistance | Typically approx. 80–100 Ω for a 12 V relay |
| Contact Rating | Up to 30 A / 40 A, depending on model |
| Contact Arrangement | COM, NO, NC |
| Coil Terminals | 85, 86 |
| Contact Terminals | 30, 87, 87a |
| Operating Mode | Electromagnetic switching |
| Insulation | Coil electrically isolated from contacts |
| Application | Load switching, alarm, motor, lamp, fan and control circuits |
| Pin 85 | Coil − — Relay coil negative / ground |
| Pin 86 | Coil + — Relay coil positive supply |
| Pin 30 | COM — Common contact / switched input |
| Pin 87 | NO — Normally Open contact |
| Pin 87a | NC — Normally Closed contact |
| Relay OFF Operation | COM (30) is connected to NC (87a) |
| Relay ON Operation | COM (30) changes over and connects to NO (87) |