3RT20251AF00 — Siemens Contactor S0 16A 110VAC
Catalog Comparison: 3RT20251AF00 and In-Catalog Alternatives
The table below provides a side-by-side parametric view of the primary part and listed alternatives sharing the 3RT2025 base number. All parts listed are Siemens contactors in the S0 frame class with auxiliary contacts; however, coil voltage, contact arrangement, and current rating differ. Any selection requires the designer's own coordination review.
| Parameter | 3RT20251AF00 (primary) | 3RT20251AF04 | 3RT20251AV00 | 3RT20251AB00 | 3RT20251AU00 | 3RT20251AP00 | 3RT20251AD20 |
|---|---|---|---|---|---|---|---|
| Coil Voltage | 110VAC | 110VAC | 400VAC | 24VAC | 240VAC | 230VAC | 42VAC |
| Must Operate Voltage | 88 VAC | 88 VAC | 320 VAC | 19.2 VAC | 192 VAC | 184 VAC | 35.7 VAC |
| Contact Form | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) |
| Auxiliary Configuration | 1NO/1NC | 2NO/2NC | 1NO/1NC | 1NO/1NC | 1NO/1NC | 1NO/1NC | 1NO/1NC |
| Contact Rating (Current) | 40 A | 17 A | 17 A | 16 A | 17 A | 40 A | 17 A |
| Coil Power | 65VA | 65VA | 65VA | 65VA | 65VA | 65VA | 67VA |
| Operate Time | 38 ms | 40 ms | 40 ms | 38 ms | 40 ms | 38 ms | 40 ms |
| Mounting Type | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail |
| Encapsulation | Bulk | Box | Box | Bulk | Box | Bulk | Box |
| Operating Temperature | 25°C ~ 60°C | 25°C ~ 60°C | 25°C ~ 60°C | 25°C~60°C | 25°C ~ 60°C | 25°C ~ 60°C | 25°C~60°C |
| Similarity (0–1) | 1.00 | 1.00 | 0.96 | 0.96 | 0.96 | 0.96 | 0.96 |
Why Each Alternate Is Similar
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3RT20251AF04: Shares the same 110VAC coil voltage, 65VA coil power, 88 VAC must-operate voltage, 3PST-NO contact form, and DIN Rail/chassis mounting as the primary part. This alternate is a higher-similarity match (1.00) but differs in auxiliary contact configuration (2NO/2NC instead of 1NO/1NC) and lists a lower contact rating of 17 A in the catalog record.
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3RT20251AV00: Same 65VA coil power, 3PST-NO contact form, and mounting type as the primary part. The coil voltage is 400VAC with a must-operate voltage of 320 VAC; contact rating in the catalog record is 17 A versus 40 A on the primary.
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3RT20251AB00: Shares 65VA coil power, 3PST-NO contact form, 38 ms operate time, bulk encapsulation, and DIN Rail/chassis mounting. Coil voltage is 24VAC with a must-operate of 19.2 VAC; contact rating listed as 16 A.
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3RT20251AU00: Same 65VA coil power, 3PST-NO contact form, and mounting type as the primary. Coil voltage is 240VAC with a must-operate of 192 VAC; catalog contact rating is 17 A.
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3RT20251AP00: Matches the primary on coil power (65VA), contact form (3PST-NO), operate time (38 ms), bulk encapsulation, and DIN Rail/chassis mounting. Coil voltage is 230VAC with a must-operate of 184 VAC; contact rating matches the primary at 40 A.
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3RT20251AD20: Shares the same base product number (3RT2025), auxiliary contacts, 3PST-NO contact form, and mounting type. Coil voltage is 42VAC with a must-operate of 35.7 VAC; coil power is listed as 67VA and contact rating as 17 A.
3RT20251AF00 Specifications
The Siemens 3RT20251AF00 is a size S0 electromechanical contactor in the 3RT2025 series, rated for a maximum contact current of 40 A in the catalog record. It operates from a 110VAC coil consuming 65VA, with a must-operate threshold of 88 VAC. The unit provides a 3PST-NO (3 Form A) main contact arrangement plus one normally open and one normally closed auxiliary contact. Operate time is 38 ms. Operating temperature range spans 25°C to 60°C. Mounting is chassis or DIN Rail.
FAQ
What coil voltage does the 3RT20251AF00 use? The 3RT20251AF00 uses a 110VAC coil with a must-operate voltage of 88 VAC.
What is the contact rating for the 3RT20251AF00? The catalog record lists a maximum contact current rating of 40 A.
What auxiliary contact configuration does the 3RT20251AF00 include? The unit includes one normally open (NO) and one normally closed (NC) auxiliary contact alongside the 3PST-NO main contacts.