Siemens 3RT20162AF02 Electromechanical Contactor
Application Context
In a motor branch or lighting feeder, the 3RT20162AF02 occupies the DIN-rail slot next to an overload relay and a miniature circuit breaker, providing the electrically held switching element that isolates and energizes the load side of the circuit. The contactor carries a 9 A contact rating at the coil voltage of 110 VAC and includes a spring-loaded (sprung) 1NC auxiliary contact for control-side interlock wiring.
Key Specifications
| Parameter | Value |
|---|---|
| Base Product Number | 3RT2016 |
| Contact Form | 3PST-NO (3 Form A) |
| Contact Rating (Current) | 9 A |
| Coil Voltage | 110 VAC |
| Coil Power | 27 VA |
| Must Operate Voltage | 93.5 VAC |
| Operate Time | 35 ms |
| Operating Temperature | 25°C to 60°C |
| Mounting | Chassis Mount, DIN Rail |
| Encapsulation | Bulk |
| Features | Auxiliary Contacts |
Engineering Verification Checklist
- Control circuit supply is 110 VAC nominal; must-operate threshold is 93.5 VAC
- Branch load current does not exceed 9 A; coordination with upstream OCPD is required
- Auxiliary contact configuration (1NC) matches the interlock or status-feedback requirement
- 27 VA inrush coil burden is compatible with the upstream contactor coil or control transformer
- Operating ambient temperature range 25°C to 60°C is acceptable for the enclosure location
- Spring-loaded terminal style is selected; verify tooling and wire ferrule compatibility for field wiring
- DIN rail mounting clearance allows proper heat dissipation and side-by-side device spacing
- 35 ms operate time is acceptable for the motor starting or sequential interlocking sequence
Similar Catalog Parts
The following in-catalog alternates share the 3RT2016 base number and S00 frame size; all require the user's own selection and qualification.
| MPN | Coil Voltage | Contact Config | Coil Power |
|---|---|---|---|
| 3RT20162AF02 (primary) | 110 VAC | 1NC sprg | 27 VA |
| 3RT20162AF04 | 110 VAC | 2NO/2NC | 24.3 VA |
| 3RT20162AF01 | 110 VAC | 1NO sprg | 24.3 VA |
Why these are similar
- 3RT20162AF04 matches the primary at 110 VAC and 9 A but swaps the single NC auxiliary for a 2NO/2NC arrangement; the coil power is lower at 24.3 VA.
- 3RT20162AF01 shares the same 110 VAC coil and 9 A rating but replaces the NC contact with a normally open contact; power draw is 24.3 VA.
- All three use the same S00 frame and DIN-rail mounting, allowing mechanical interchange in the panel layout.
Other 3RT2016 variants in the catalog include lower AC coil voltages (24 VAC, 42 VAC, 48 VAC) and one 400 VAC coil variant; these differ from the primary in control-circuit voltage and must-operate threshold only.