Littelfuse SIR2B20A4, SIR Series, 90-150VAC/DC, 20A, Solid State SPST-NO (1 Form A) Module
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The solid-state SIR series relays are designed for industrial applications requiring rugged, reliable operation. These relays provide an optically-isolated, high-capacity, solid-state output with power switching capability up to 20 A steady state, 200 A inrush. The SIR2 zero voltage switching is intended for resistive and incandescent loads and can extend the life of an incandescent lamp up to 10 times. The SIR1 random switching is intended for inductive loads. When fully insulated female terminals are used on the connection wires, the system meets the requirements for touch-proof connections.
Operation
The solid-state output is located between terminals 1 and 3 and is normally open or closed without control voltage applied to terminals 4 and 5. When control voltage is applied to terminals 4 and 5, the solid-state output opens or closes, respectively.
Reset
Removing control voltage resets the output. The unit can also be reset if the output voltage is removed.
*Must be bolted to a metal surface using the included heat sink compound. The maximum mounting surface temperature is 90 °C. Inrush: Non-repetitive for 16 ms
| Output | |
| Type | Optical isolation, totally solid state |
| Form | SPST, NO or NC |
| Voltage | 24, 120, or 230 V ac |
| Tolerance | ±20% |
| Rating |
Steady State Inrush* Output Device 3 A 10 A Triac 6 A 60 A Triac 10 A 100 A Triac 20 A 200 A Triac |
| Minimum Load Current | ≅ 50 mA |
| Voltage Drop | ≅ 2.0 V at rated current |
| Leakage Current (Open State) | ≅ 6 mA |
| Input | |
| Type Optical isolation | LED/photo transistor |
| Control Voltage | 9 to 290 V ac/dc in 3 ranges |
| Power Consumption | ≤ 0.5W |
| Protection | |
| Circuitry | Encapsulated |
| Dielectric Breakdown | ≥ 2000 V RMS terminals to mounting surface |
| Insulation Resistance | ≥ 100 MΩ |
| Mechanical | |
| Mounting * | Surface mount with one #10 (M5 x 0.8) screw |
| Dimensions |
H 50.8 mm (2”) W 50.8 mm (2”) D 38.4 mm (1.51”) |
| Termination | 0.25 in. (6.35 mm) male quick connect terminals |
| Environmental | |
| Operating/Storage Temperature | -40 °C to 60 °C / -55 °C to 85 °C |
| Humidity | 95% relative, non-condensing |
| Weight | ≅ 3.9 oz (111 g) |
| Certification & Compliance | |
| UL Recognized | File E57310 UL508 |
| CSA | File LR057415 |