Siemens 3RT20161AT61 Contactors (S00)
The 3RT2016 series are DIN-rail or chassis-mount electromechanical contactors in Siemens S00 form factor. The 3RT20161AT61 variant carries a 600 VAC coil and is rated AC-3 at 4 kW / 400 V (9 A nominal).
Contactors, AC-3 4 kW / 400 V — 3RT20161AT61 and similar coil variants
Compare against these alternates before design-in; ratings must be verified in-circuit.
| Spec | 3RT20161AT61 (seed) | 3RT20161AK61 | 3RT20161AR61 | 3RT20161AV61 |
|---|---|---|---|---|
| Coil Voltage | 600 VAC | 120 VAC | 440 VAC | 480 VAC |
| Contact Rating | 9 A | 9 A | 9 A | 9 A |
| Mounting | Chassis / DIN Rail | Chassis / DIN Rail | Chassis / DIN Rail | Chassis / DIN Rail |
| AC-3 Power (400 V) | 4 kW | 4 kW | 4 kW | 4 kW |
| Must Operate Voltage | 510 VAC | 96 VAC | 374 VAC | 408 VAC |
| Operate Time | 35 ms | 35 ms | 35 ms | 35 ms |
| Operating Temp | 25°C ~ 60°C | 25°C ~ 60°C | 25°C ~ 60°C | 25°C~60°C |
| Encapsulation | Box | Bulk | Box | Box |
| Similarity | — | 1.0 | 1.0 | 1.0 |
- 3RT20161AK61: 120 VAC coil; same 9 A / 4 kW AC-3 rating and S00 foot print. Coil power lower at 26.4 VA; suited for lower-voltage control systems.
- 3RT20161AR61: 440 VAC coil; matches 31.7 VA coil power, 374 VAC must-operate, and identical box packaging.
- 3RT20161AV61: 480 VAC coil with 408 VAC must-operate; shares the 31.7 VA coil and box encapsulation for heavier AC circuits.
Engineering verification checklist
- Confirm coil voltage labeling on contactor body matches control-circuit nominal (600 VAC here).
- Verify must-operate voltage (510 VAC) is below lowest expected system voltage during energization.
- Check AC-3 utilization category matches load type (motors, resistive heating); AC-1 or DC ratings differ.
- Confirm contact current rating (9 A) is adequate with margin for inrush; derate if switching more than 8 cycles per minute.
- Validate auxiliary contact configuration (1NO shown) fits the interlock or status-feedback requirement.
- Verify mechanical mounting clearances per IEC/EN 60947-4-1 for clearance and creepage distances at 600 V.
- Confirm DIN rail clip or chassis mounting orientation does not stress coil terminations during installation.
- Check that enclosure ambient temperature (25°C–60°C) stays within spec under worst-case panel load conditions.
- Verify coil inrush and sealed VA values against control-transformer or supply available short-circuit capacity.