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Siemens 3RT1016-1AR21 — Contactors

Siemens 3RT1016-1AR21 SIRIUS Power Contactor, S00, 24 VDC Co

MPN3RT1016-1AR21

Siemens SIRIUS, power contactor, size S00, 3RT1016-1AR21, 24 V DC coil, 10 A AC-12, screw terminals, snap-on 35 mm DIN rail.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1016-1AR21 — Identification
ParameterValue
Contactor frame sizeS00
3RT1016-1AR21 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V4.5 kW
Rated value @ 690 V5.5 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1016-1AR21 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz440 V
3RT1016-1AR21 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1016-1AR21 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 35 A
Short-circuit coordination type 2, fusefuse gL/gG: 20 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1016-1AR21 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1016-1AR21 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1016-1AR21 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1016-1AR21 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

The Siemens 3RT1016-1AR21 is a SIRIUS S00 power contactor with a 24 VDC coil, rated for 10 A in AC-12 duty (resistive loads at 50/60 Hz). For motor duty, check the AC-2 and AC-4 ratings: 4 kW at 400 V in AC-2 (slip-ring motors) and 8.5 A at 400 V in AC-4 (plugging/inching). Coil draws from a 24 VDC supply; the contactor holds in down to roughly 18 V before dropout. The S00 frame keeps the footprint compact at 45 mm wide, 57.5 mm tall, and 72 mm deep — fits tight DIN-rail rows.

Terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid/stranded. AWG equivalents: 2x (20 to 16), 2x (18 to 14), 1x 12. Front and terminal protection is IP20 — finger-safe for panel installation, not for washdown.

Short-circuit coordination and protection

This matters when specifying upstream protection for the panel.

Frequently asked questions

What is the closest functional alternative to 3RT1016-1AR21?

The 3RT1016-1AR11 shares the same S00 frame and screw-terminal format but uses a different coil voltage (110 VAC 50/60 Hz). If your control voltage is 24 VDC, the 3RT1016-1AR21 is the correct choice; the 1AR11 will not pull in on 24 VDC. The 3RT1016-2AP02 adds a second auxiliary contact block but also uses a different coil. No direct drop-in substitute exists without verifying coil voltage.

Will 3RT1016-1AR21 drop into a panel specified for 3RT1016-1AR11?

Mechanically yes — same S00 frame, same 45 mm width, same DIN-rail mounting. Electrically no, unless the control circuit is rewired: the 1AR21 uses a 24 VDC coil, while the 1AR11 uses 110 VAC. Swapping them without changing the coil supply will not work.

Where can I buy 3RT1016-1AR21?

This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1016-1AR21