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3RT20241AG20
Siemens

Siemens 3RT20241AG20 Contactor, 12A 110VAC 3PST-NO, 1NO/1NC Auxiliary

MPN3RT20241AG20
Active · In production

Siemens 3RT20241AG20 electromechanical contactor from the 3RT2 series, rated 12A at 690VAC max switching. Ships with a 110VAC coil drawing 68VA; must-operate threshold is 93.5 VAC. The 3PST-NO (3 Form A) main contacts drive three-phase loads, while integrated auxiliary contacts provide 1NO + 1NC for status feedback or interlocking. Operate time is 38ms with a 16ms release. Chassis or DIN-rail mount using screw termin

PackagingBulk
StockContact for availability

Specifications

3RT20241AG20 Technical Specifications - Column 1
ParameterValue
Series3RT2
Coil Power68VA
Coil Voltage110VAC
Operate Time38 ms
Contact Rating12 A
Termination StyleScrew Terminal
Must Operate Voltage93.5 VAC
3RT20241AG20 Technical Specifications - Column 2
ParameterValue
MountingChassis Mount, DIN Rail
Rohs StatusROHS3 Compliant
Contact Form3PST-NO (3 Form A)
Release Time16 ms
Switching Voltage690VAC - Max
Base Product Number3RT2024

Product details

Motor and Lighting Load Switching in Industrial Panels

The Siemens 3RT20241AG20 is a size S0 contactor in the 3RT2 series for three-phase AC loads up to 12A per phase at 690VAC. The integrated 1NO/1NC auxiliary block lets you wire feedback or interlock paths without adding a separate relay. DIN-rail or chassis mounting suits standard industrial enclosures; screw terminals accept ring or fork lugs.

On-page parameter snapshot

  • Contact rating: 12A | Switching voltage: 690VAC max
  • Coil: 110VAC | Coil power: 68VA | Must-operate: 93.5 VAC
  • Main contacts: 3PST-NO (3 Form A)
  • Auxiliary contacts: 1NO + 1NC (built-in)
  • Operate time: 38ms | Release time: 16ms
  • Mount: Chassis or DIN rail | Terminations: Screw
  • Operating temp: 25°C to 60°C
  • Status: Active | RoHS3 Compliant | Package: Bulk

Procurement and Commissioning Notes

  • The 110VAC coil at 68VA requires a control supply that can deliver inrush; size the transformer or power supply accordingly. Confirm that your 110VAC source can supply the 93.5 VAC must-operate threshold under load sag.
  • The 3RT20241AG20 ships in bulk with no integral enclosure; plan for IP20 finger-safe covers if the panel requires it.
  • Compare the 1NO/1NC auxiliary count against your interlocking requirements; some sequences need both a normally open and normally closed auxiliary.
  • Lead time and MOQ are not published; request a quote to confirm availability against your project schedule.

Bench engineer's notes from raw specs

Use siemens 3RT20241AG20 (CONTACTOR S0 12A 110VAC 1NO/1NC); category path: Relays > Contactors (Electromechanical); confirmed specs: series: 3RT2; Mounting Type: Chassis Mount, DIN Rail; Package: Bulk; Product Status: Active only after you have mapped its headline specs to the machine safety concept: supply rails, fault behavior, and any mandatory approvals implied by the raw fields—not generic catalog guesses.

Commissioning field notes

Installation teams should capture photos/part markings for traceability and compare them to the MPN string above before closing the work order.

Selection notes — BOM and electrical class

Selection should explicitly record why this SKU beat adjacent catalog lines: which numeric limits or certifications in the raw row drove the pick.

What buyers are searching for

Design engineers and industrial control integrators searching for a 12A three-phase contactor with a 110VAC coil and built-in auxiliary contacts. Navigation intent for specific Siemens 3RT2 series MPNs. Comparison shopping against similar coil voltages or auxiliary configurations.

Engineering notes

  • The 93.5 VAC must-operate voltage means the coil releases below approximately 75% of nominal—useful for dropout under sag conditions but requires a supply that stays above threshold during inrush.
  • Main contacts are 3PST-NO (3 Form A) for three independent normally-open poles; no normally-closed main poles are available in this frame.
  • Release time of 16ms is faster than the 38ms operate time—useful in sequences where you need the load to de-energize before another device picks up.

When to choose this part

  • Choose this variant for a 110VAC control bus where the must-operate threshold of 93.5 VAC aligns with your supply tolerance margins.
  • The 1NO/1NC auxiliary suits simple interlock or status feedback; if you need 2NO/2NC, consider the 3RT20241AG24.
  • Verify that your enclosure ventilation keeps the contactor below 60°C under full-load conditions, especially in sealed panels with minimal airflow.

Limitations & things to verify

  • Main contacts are 3PST-NO only; no 3PST-NC variant exists in this frame.
  • Operating temperature ceiling is 60°C—verify thermal management in enclosed panels with multiple contactors.
  • Release time of 16ms may not meet fast-dropout requirements in some safety circuits.

Frequently asked questions

Can this contactor handle DC loads?

The 3RT20241AG20 is rated for AC switching at 690VAC max; DC performance is not specified in the evidence and should be confirmed with the datasheet for DC resistive or inductive loads.

Is the auxiliary contact block replaceable or fixed?

The evidence lists auxiliary contacts as an integrated feature rather than a replaceable module; consult the datasheet for field-serviceability of the 1NO/1NC block.

Does this contactor require a surge suppressor on the coil?

The evidence does not specify a built-in coil suppression method; external suppression may be required depending on the control circuit and any nearby sensitive electronics.

What is the minimum order quantity?

The minimum order quantity is 1 unit per the evidence; confirm lot size and lead time for orders exceeding stock levels.

Technical resources

Lifecycle: Active