Siemens 3RT1015-1AK61 Power Contactor: Complete Technical Guide and Applications

5. Januar 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What is the Siemens 3RT1015-1AK61 contactor?

The Siemens SIRIUS 3RT1015-1AK61 power contactor — size S00, three poles plus one built-in NO auxiliary contact, with an AC 110 V 50 Hz / 120 V 60 Hz coil printed right on the face between A1 and A2. Ratings from the side label: AC-3 2.2 kW / 3 kW / 4 kW at 230 / 400 / 690 V (7 A / 7 A / 4 A), AC-15 at 6/3/1 A, UL horsepowers to 5 HP at 575 V, motors break-all-lines 16 A 600 V AC, short-circuit protection 5 kA 600 V max with a Class RK5 30 A fuse, auxiliary contacts A600/P600. Terminal layout: 1L1 / 3L2 / 5L3 line side, 2T1 / 4T2 / 6T3 load side, 13/14 NO auxiliary, A1/A2 coil. Made in Germany, production code G/120504 (April 2005 — early SIRIUS production, hence the classic 35 × 50 mm body), instruction reference 3ZX1012-0RH11-1AA1, bar code 40112091272705. Four pieces, refurbished to like-new grade (翻新可充新), in their original Siemens boxes, recorded 17–20 December 2025 at about 0.5 kg, one-year warranty. Note for the record: one frame in the source camera roll shows an unrelated PCIe card back — we have excluded it from the photos below, since it is not part of this listing. Fourteen photos plus the warehouse video.

3 min readContent reviewed 7 October 2026

Part details

3RT1015-1AK61, per face, side label, box and record
Field	Value
Manufacturer	Siemens — SIRIUS family, Made in Germany
Order number	3RT1015-1AK61 (size S00)
Coil	AC 110 V 50 Hz / 120 V 60 Hz — printed between A1 and A2
Contacts	3 poles (1L1/3L2/5L3 → 2T1/4T2/6T3) + 1 NO auxiliary (13/14)
AC-3 rating	2.2 kW @ 230 V · 3 kW @ 400 V · 4 kW @ 690 V (7 A / 7 A / 4 A)
AC-15 / UL	AC-15 6/3/1 A; UL 1PH HP ¼ (115 V) / ¾ (230 V); 3PH HP 2 / 3 / 5 (230/460/575 V)
Protection data	Motors break all lines 16 A 600 V AC · short-circuit 5 kA 600 V, Class RK5 fuse 30 A max · aux contacts A600/P600 · 75 °C CU wire only
Wire range	Mains 2× 0.25–2.5 mm² (AWG 24–14); aux 2× 0.25–1.5 mm²
Mounting	35 mm DIN rail or 35 × 50 mm screw pattern (M4), PA66-GF25FR body
Traceability	G/120504·E05· (April 2005) · Instr.Ord.No. 3ZX1012-0RH11-1AA1 · barcode 40112091272705 · box G/151027 802 · 01058636
Condition / quantity	Refurbished, like-new grade (可充新) — 4 pieces in original boxes
Weight	About 0.5 kg as recorded
Intake recorded	17–20 December 2025
Warranty	One year

Scroll sideways to see the full table.

Buying the AK61 honestly

Two things decide whether this exact contactor is the one for your panel. First, the coil: AK61 means AC 110/120 V, and the face prints it plainly — a 24 V DC control circuit needs the BB4x family instead (our shop lists the 3RT1015-1BB42 DC version), and forcing an AC coil onto a DC supply burns it in minutes. Second, the vintage: G/120504 marks this batch as April 2005 production — early SIRIUS, the build with the 35 × 50 mm screw footprint and the taller S00 body. It swaps straight into panels specced for that era, and mechanically the contact set is refurbished to like-new grade, so it is sold and priced as reconditioned stock, not factory-sealed new. On the bench it behaves as the label says: 3 kW at 400 V AC-3 is the workhorse rating for small motors up to about 4 kW, the built-in 13/14 NO gives your PLC a running feedback without an add-on block, and the 16 A / 5 kA coordination numbers tell you the upstream fuse class to keep the short-circuit rating honest. Fit it on the 35 mm rail or screw it down on the 35 × 50 pattern, land 75 °C copper only, and the refurbishment story ends where it should — in a panel that runs like the original.

Photos

All images below are original warehouse photos of the exact contactors covered by this record, taken before dispatch. Click any photo to view it full size.

Side rating label — The side rating label in full: IEC/EN 60947-4-1, AC-3 2.2/3/4 kW and 7/7/4 A, AC-15 6/3/1 A, the UL listing table to 575 V, 16 A 600 V break-all-lines, 5 kA RK5 30 A, A600/P600 aux contacts, Made in Germany, 3ZX1012-0RH11-1AA1.

Four contactors, terminal side — The four contactors from the terminal side: five screw positions per face — mains, auxiliary and coil all on the same front.

Four units, rear — From the rear: the DIN-rail spring and the screw-fix feet of the S00 body.

Four original boxes — The four original Siemens boxes: Schütz/contactor 接触器, AC 110–120V 50/60Hz, AC-3 3kW 400V 1NO, 3RT1015-1AK61, QTY 1, Made in Germany, barcode 40112091272705.

Top view: the light-grey SIRIUS top with the SIEMENS print, the terminal screws and the coil lugs at the ends.

Three-quarter view of one unit — the classic early-SIRIUS proportions of the 35 × 50 body.

Second three-quarter view — Another angle with the side label and the top terminals in one frame.

Base detail — The base: PA66-GF25FR moulding mark, the M4 screw holes on the 35 × 50 pattern, and the rail spring.

Two bases together — identical moulding marks and rail springs across the set.

Four fronts flat-on — The four fronts flat-on: 1L1 / 3L2 / 5L3 / 13NO / A1 over 2T1 / 4T2 / 6T3 / 14NO / A2, 110V 50Hz · 120V 60Hz, G/120504·E05·, 3RT1015-1AK61 on every face.

Front close-up — The front at reading distance: SIEMENS / SIRIUS, the 10E marking, coil voltage print and the model number under the bottom row.

Four side labels — All four side labels — the same rating table on every unit.

Base close-up: PA66-GF25FR, M4, 35 × 50 — the screw-fix pattern for panels without a rail.

Four bases with boxes — The four bases with the opened original boxes behind — the complete set as received.

Warehouse video of the four contactors, recorded before dispatch.

The DC-coil sibling of this size is listed in our shop as the 3RT1015-1AF02 contactor page; other SIRIUS sizes include the 3RT1015-1BB42 and the 3RT1015-1BM41.