Choose the right IoTextra output for your load.
Compare electromechanical relays, latching relays, NPN transistor outputs, solid-state relays and MOSFET outputs by load type, voltage, current and switching requirements.
| Output type | IoTextra module | Channels | Key specs / variants | What to control / When to choose |
|---|---|---|---|---|
| SPST electromechanical relay | IoTextra Octal | 2 | 5 A @ 250 VAC / 30 VDC | Lamps, heaters, pumps, fans, solenoid valves, solenoids, electric locks, sirens, contactor/relay coils and other AC or DC loads. Choose SPST for simple isolated ON/OFF switching when an NC/changeover contact is not required. |
| IoTextra Octal4 | 4 | |||
| IoTextra Relay | 4 | |||
| SPDT electromechanical relay | IoTextra Relay2 | 4 | NO: 5 A @ 250 VAC / 30 VDC; 10 A @ 125 VAC NC: 3 A @ 250 VAC / 30 VDC |
Pumps, fans, valves, actuators, lighting, heaters, locks, alarms, contactors and other AC/DC loads. Choose SPDT when both NO and NC/changeover contacts are useful. |
| Latching electromechanical relay | IoTextra Relay | 4 | 2 A @ 250 VAC / 220 VDC | Lighting, valves, actuators, locks, contactors and other AC/DC control loads. Choose a latching relay when the selected output state should remain without continuous coil power. |
| IoTextra Octal3 | 4 | |||
| NPN Darlington transistor | IoTextra Octal | 2 | Up to 100 VDC; collector current 8 A (16 A peak); output terminal block up to 10 A | DC solenoids, solenoid valves, electromagnets, relay/contactor coils, lamps/indicators, sirens, locks and suitable DC actuators. Choose NPN for electronic DC switching when mechanical contacts are unnecessary and frequent switching is desirable. |
| IoTextra Octal2 | 4 | |||
| SSR — AC | IoTextra SSR Small | 8 | 350 VAC / 0.12 A | AC relay/contactor coils, small AC solenoids and valves, indicators and other low-current AC control loads. Choose SSR for silent, frequent switching, galvanic isolation and no mechanical contact wear. |
| SSR — DC | IoTextra SSR Small | 8 | 60 VDC / 0.5 A | DC solenoids, valves, relay/contactor coils, locks, indicators and other low-current DC loads. Choose SSR when silent operation, frequent switching and long switching-cycle life are important. |
| IoTextra SSR Small | 8 | 40 VDC / 2 A | ||
| MOSFET | IoTextra MOSFET2 | 8 | 30 VDC / 9 A | DC motors, pumps, fans, solenoids, solenoid valves, electromagnets, LED strips/high-power LEDs, DC heaters and other substantial DC loads. Choose MOSFET when high efficiency, higher DC current, fast switching or PWM matters. |
| IoTextra MOSFET2 | 8 | 60 VDC / 7 A | ||
| IoTextra MOSFET2 | 8 | 90 VDC / 6 A |
