Siemens 3RT20161BB41 S00 Contactor
1. Selection Trade-offs for the 3RT2016 S00 Family
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Coil voltage constraint (24VDC): The must-operate threshold is 19.2 VDC. The coil draws 166.7 mA and dissipates 4W; confirm the DC control supply can sustain this current under nominal and brownout conditions.
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Main contact rating (9A AC-3, 3 Form A): The device carries three normally-open power contacts. Verify the motor full-load current and coordination class do not exceed the 9A AC-3 rating for the intended load voltage.
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Auxiliary contact configuration: The seed record lists "Auxiliary Contacts" without specifying the arrangement. In-catalog variants span 1NO, 1NC, and 2NO/2NC configurations. Match the feedback/interlock needs of the control scheme before selecting a variant.
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Mounting and enclosure format: Both chassis mount and DIN rail attachment are supported. The seed ships in bulk packaging; several in-catalog variants use box packaging. Installation density and thermal management influence which format suits the panel layout.
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Operating temperature window: The seed record does not list an operating temperature range. Selected in-catalog variants specify 25°C to 60°C. Ambient thermal conditions in the enclosure should be reviewed against that range.
2. Key Parameters
| Parameter | Value |
|---|---|
| Base Product Number | 3RT2016 |
| Coil Voltage | 24VDC |
| Coil Power | 4W |
| Coil Current | 166.7 mA |
| Coil Resistance | 144 Ohms |
| Must Operate Voltage | 19.2 VDC |
| Contact Form | 3PST-NO (3 Form A) |
| Contact Rating (Current) | 9 A |
| Mounting Type | Chassis Mount, DIN Rail |
| Features | Auxiliary Contacts |
| Encapsulation | Bulk |
| Manufacturer | Siemens |
3. Similar Catalog Parts
All in-catalog alternates require the reader's own qualification. Side-by-side comparison against the seed:
| MPN | Coil Voltage | Contact Rating | Mounting | Encapsulation | Shared Keys |
|---|---|---|---|---|---|
| 3RT20161BB41 (seed) | 24VDC | 9A | Chassis, DIN Rail | Bulk | base product, coil voltage, contact rating, mounting, power, contact form |
| 3RT20161BB411AA0 | 24VDC | 9A | Chassis, DIN Rail | Box | base product, coil voltage, contact rating, mounting, power, contact form |
| 3RT20161BB44 | 24VDC | 9A | Chassis, DIN Rail | Box | base product, coil voltage, contact rating, mounting, power, contact form |
| 3RT20161BG41 | 125VDC | 9A | Chassis, DIN Rail | Box | base product, contact rating, mounting, power, contact form |
Why they are similar: All variants share the 3RT2016 base product number, 9A contact rating, and chassis/DIN rail mounting. The BB41-seed and two alternates share identical 24VDC coil voltage, 4W coil power, and must-operate voltage of 19.2 VDC. The 3RT20161BG41 differs in coil voltage (125VDC) and must-operate voltage (100 VDC), retaining the same power contact and mounting attributes.
4. Engineering Verification Checklist
- DC control supply delivers 24VDC and can supply at least 166.7 mA continuously
- Motor load full-load current is within 9A AC-3 rating for the applied voltage
- Auxiliary contact arrangement (1NO, 1NC, or 2NO/2NC) satisfies the control scheme's feedback and interlock requirements
- Panel enclosure accommodates chassis mount or DIN rail attachment footprint
- Bulk packaging is acceptable for the installation; if boxed variants are preferred, confirm dimensional fit
- Ambient temperature in the enclosure does not exceed the 25°C–60°C operating window where applicable
- Must-operate voltage (19.2 VDC) is met including voltage drop in wiring
- Coordination of upstream short-circuit protection with the contactor's 9A contact rating is verified for the branch circuit