SIEMENS 3RT1046-1AN20 Contactor | Replacement, Equivalent & Selection Guide
The SIEMENS 3RT1046-1AN20 is a non-reversing AC contactor from the SIRIUS 3RT series, rated for S3 frame size, 95A AC-3 duty, with a 220VAC 50/60Hz control coil and 3-pole screw-type main terminals. It is a core switching device for motor starters, pump control panels, HVAC systems, and industrial drive circuits where reliable, high-cycle switching of three-phase loads is required.
Within the SIRIUS 3RT portfolio, the 3RT1046 occupies the mid-to-upper power range of the S3 frame class, bridging the gap between compact S2 contactors and the larger S6 devices. Its 95A rating makes it suitable for motors up to approximately 45kW at 400V, a capacity that covers the majority of industrial pump, fan, and compressor applications worldwide. The SIRIUS 3RT series is one of the most widely deployed contactor families in global industrial automation, with proven compatibility across Siemens SIMATIC, SINUMERIK, and third-party control architectures.
Technical Specifications
- Manufacturer: SIEMENS
- Part Number: 3RT1046-1AN20
- Series: SIRIUS 3RT
- Frame Size: S3
- Rated Current (AC-3): 95A
- Rated Power (400V AC-3): ~45kW
- Control Coil Voltage: 220VAC, 50/60Hz
- Main Poles: 3-pole
- Terminal Type: Screw terminals
- Operation Type: Non-reversing (NONREV)
- Auxiliary Contacts: 1NO + 1NC (integrated)
- Mounting: DIN rail / panel mount
- Weight: Approx. 1.8 kg
- Standards: IEC/EN 60947-4-1, UL 508
Compatible Replacement & Equivalent Models
When the 3RT1046-1AN20 is unavailable or a cross-brand alternative is required, the following models are commonly evaluated. Always verify coil voltage, frame dimensions, and auxiliary contact configuration before substitution:
- SIEMENS 3RT1046-1AP20 — Same frame, 230VAC coil variant; functionally near-identical for 220/230VAC systems
- SIEMENS 3RT1046-1AF20 — 110VAC coil variant; same mechanical envelope
- ABB AX95-30-11 — ABB equivalent, S3-class, 95A AC-3; verify mounting footprint and auxiliary wiring
- Schneider LC1D95M7 — Schneider TeSys D series, 95A, 220VAC coil; widely used cross-brand replacement
- Eaton DILM95 — Moeller/Eaton series, 95A frame; confirm terminal pitch before installation
- Chint NC2-95 — Economy-grade alternative; suitable for non-critical auxiliary circuits
Note: Cross-brand replacements require full dimensional and electrical verification. Konmask.com recommends using genuine SIEMENS parts for safety-critical applications.
Why Choose the Original Model
- Guaranteed interchangeability — Drop-in replacement for any existing 3RT1046-1AN20 installation without rewiring
- Certified performance — Factory-tested to IEC/EN 60947-4-1 and UL 508; traceable documentation available
- Long service life — SIRIUS 3RT contactors are rated for up to 10 million mechanical operations
- Accessory ecosystem — Direct compatibility with SIEMENS 3RT auxiliary contact blocks, surge suppressors, and mechanical interlocks
- Global support — Siemens worldwide service network and spare parts availability
Typical Applications
- Three-phase induction motor starting and stopping (pumps, fans, compressors up to ~45kW)
- HVAC chiller and air-handling unit motor control panels
- Water treatment and wastewater pump stations
- Conveyor and material handling drive circuits
- Industrial refrigeration compressor control
- Building automation and energy management switchgear
- OEM machine tool and packaging line motor starters
System Compatibility
- Overload relays: SIEMENS 3RU2136, 3RB3036 (S3 frame, 63–80A / 70–90A / 80–100A ranges)
- Auxiliary contact blocks: 3RH2911 series (front-mount), 3RH2921 (side-mount)
- Surge suppressors: 3RT2916-1BB00 (RC element, 24–48VAC) / 3RT2916-1CD00 (220–240VAC)
- Mechanical interlock: 3RA1921-1BA00 (for reversing starter assemblies)
- Control systems: Compatible with SIMATIC S7-1200/1500 digital outputs, third-party PLCs, and relay logic panels
- Enclosures: Fits standard IEC 72 DIN rail panels; verify depth clearance for screw terminal access
Selection Guide
Use the following criteria to confirm the 3RT1046-1AN20 is the correct contactor for your application:
- Load current: Continuous AC-3 duty ≤ 95A; derate for AC-1 resistive loads per IEC table
- Motor power: Up to ~45kW at 400V / ~37kW at 380V (three-phase)
- Coil voltage: Control circuit must supply 220VAC ±10%, 50/60Hz
- Operation type: Non-reversing only; for reversing duty, pair two units with 3RA1921-1BA00 interlock
- Switching frequency: Up to 1200 operations/hour in standard duty; consult derating curves for high-cycle applications
- Ambient temperature: –25°C to +60°C operating range (derate above +40°C per IEC 60947-4-1)
- If coil voltage differs: Select the appropriate suffix — 1AF20 (110VAC), 1AP20 (230VAC), 1AV20 (400VAC)
Quality Assurance & Sourcing
Konmask.com sources SIEMENS components through authorized distribution channels and verified industrial surplus networks. Every unit undergoes the following before dispatch:
- Visual inspection for physical damage, label integrity, and date code verification
- Coil continuity and insulation resistance check
- Contact resistance measurement on all main poles
- Packaging inspection to confirm factory-sealed or properly repackaged condition
- Documentation review: CE marking, country of origin, and batch traceability where available
We do not sell counterfeit or unverified grey-market parts. If a unit does not pass our inspection, it is not listed for sale.
How to Order
- Step 1: Confirm part number: 3RT1046-1AN20 and coil voltage (220VAC)
- Step 2: Submit an inquiry via the contact form or email support@konmask.com
- Step 3: Receive a quotation with lead time, quantity availability, and shipping options within 24 hours
- Step 4: Confirm order and arrange payment via T/T, PayPal, or agreed trade terms
- Step 5: Shipment with tracking number and packing list provided
For urgent requirements or large quantity orders, please call or WhatsApp: +0086 19859288691
Replacement & Compatibility FAQ
- Q: Can I replace a 3RT1046-1AN20 with a 3RT1046-1AP20?
- A: In most cases yes — the 1AP20 uses a 230VAC coil versus 220VAC. For systems nominally rated 220VAC, verify your actual supply voltage is within the 230VAC coil’s operating range (207–253VAC). Mechanically and electrically they are otherwise identical.
- Q: Is the Schneider LC1D95M7 a direct drop-in replacement?
- A: Electrically equivalent in rating, but the mounting footprint, terminal pitch, and auxiliary contact positions differ. Panel rewiring and possible busbar modification are required. Not recommended for quick field replacement.
- Q: What overload relay should I pair with this contactor?
- A: The SIEMENS 3RU2136 (bimetallic) or 3RB3036 (electronic) in the appropriate current range for your motor’s full-load amperage. Both are S3-frame compatible and clip directly onto the 3RT1046.
- Q: Can this contactor be used for capacitor bank switching?
- A: Standard AC-3 contactors are not rated for capacitor switching (AC-6b duty). A dedicated capacitor contactor such as the SIEMENS 3RT1646 series should be used instead.
- Q: Do you provide a certificate of conformity?
- A: Yes, upon request we provide available documentation including CE declaration, inspection report, and batch information. Contact us at the time of order.
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