Siemens 3RT23251AF00 Electromechanical Contactor
Contact Configuration and Electrical Ratings — 3RT23251AF00
| Specification | Value |
|---|---|
| Contact Form | 4PST-NO (4 Form A) |
| Contact Rating (Current) | 35 A |
| Coil Voltage | 110 VAC |
| Coil Power | 77 VA |
| Must Operate Voltage | 88 VAC |
| Base Product Number | 3RT2325 |
| Mounting Type | Chassis Mount, DIN Rail |
| Operate Time | 40 ms |
| Operating Temperature | 25°C ~ 60°C |
| Encapsulation | Box |
Four independent NO contacts support full-load switching in single-phase or three-phase configurations up to 35 A per pole. The 77 VA inrush VA rating reflects the magnetizing demand of the AC solenoid; holding VA is lower. Must-operate at 88 VAC provides approximately 80% voltage margin above the 110 VAC coil nominal, ensuring pickup under typical line sag conditions. All ratings are for resistive loads; motor or inductive loads require derating per applicable standards.
S0 Size-Class Family: Voltage Variant Comparison
| Spec | 3RT23251AF00 | 3RT23251AP00 | 3RT23251AB00 | 3RT23251AG60 |
|---|---|---|---|---|
| Coil Voltage | 110 VAC | 230 VAC | 24 VAC | 110 VAC |
| Must Operate | 88 VAC | 184 VAC | 19.2 VAC | 93.5 VAC |
| Contact Rating | 35 A | 35 A | 35 A | 35 A |
| Coil Power | 77 VA | 77 VA | 77 VA | 67 VA |
| Contact Form | 4PST-NO | 4PST-NO | 4PST-NO | 4PST-NO |
| Similarity | — | 1.0 | 1.0 | 1.0 |
All three alternates share the same 3RT2325 base, chassis/DIN mounting, and four NO contact arrangement. 3RT23251AP00 differs only in coil voltage (230 VAC vs 110 VAC); must-operate scales proportionally at ~80% of nominal. 3RT23251AB00 provides a 24 VAC coil option for SELV control circuits, with must-operate at 19.2 VAC. 3RT23251AG60 maintains the 110 VAC coil but reduces coil power to 67 VA and raises must-operate to 93.5 VAC; the title shows 35 A with 4 NO rather than 5 NO, suggesting a contact-form difference not captured in the structured specs.
Engineering Verification Checklist
- Confirm control-circuit voltage matches 110 VAC nominal; verify must-operate margin (88 VAC minimum) against expected line conditions.
- Verify each pole contact rating meets or exceeds load break requirements for the target circuit; derate for inductive or motor loads per applicable standards.
- Confirm DIN rail or chassis mounting provisions match the physical enclosure or panel layout.
- Check that 77 VA coil inrush does not overload the supplying control transformer or switching device.
- Verify operating temperature range (25°C–60°C) is appropriate for the installation environment; elevated ambient may require derating.
- Confirm auxiliary contact features are compatible with any required status signaling or interlock functions.
- Validate that physical dimensions and terminal layout permit proper wiring and cable clearance in the designated enclosure.
- Confirm the box encapsulation type is acceptable for the intended industrial environment (dust, moisture, vibration exposure).
- Verify that panel cutout or mounting hole pattern aligns with standard Siemens S0 contactor mounting configurations.