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Siemens 3RT1035-1KJ84-0LA0 — Contactors

Siemens SIRIUS 3RT1035-1KJ84-0LA0 power contactor, S2, 72 V

MPN3RT1035-1KJ84-0LA0

Siemens SIRIUS power contactor, size S2, 3RT1035-1KJ84-0LA0, 72 V DC coil, screw-type terminals, 35 A AC-4 at 400 V, current production.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1035-1KJ84-0LA0 — Identification
ParameterValue
Contactor frame sizeS2
3RT1035-1KJ84-0LA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V35 A
Rated value @ 400 V3 A
Rated value @ 500 V22 kW
Rated value @ 690 V11.4 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
3RT1035-1KJ84-0LA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1035-1KJ84-0LA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1035-1KJ84-0LA0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 125 A
Short-circuit coordination type 2, fusefuse gL/gG: 63 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1035-1KJ84-0LA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control 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, solid or stranded2x (0.75 ... 16 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1035-1KJ84-0LA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1035-1KJ84-0LA0 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT1035-1KJ84-0LA0 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth179 mm

Product details

It is a current-production part, meaning it is still in active manufacture and available through authorized distribution channels. The 72 V DC coil is the key selection parameter here: this contactor pulls in on a 72 V DC control voltage, with a rated operating current of 10 A at 24 V and 2 A at 60 V. The DC coil means it is suited for systems with a DC control bus, common in some process plants and renewable energy installations. For motor switching, the AC-3 rating at 500 V is 22 kW, and at 690 V it is 11.4 kW. A 35 A AC-4 rating means it can handle the high electrical wear of frequent jogging or plugging without premature contact welding. Side-by-side mounting is permitted, which saves panel width when ganging multiple contactors for multi-speed or reversing starters.

Terminal specs and wiring

Main current circuit terminals are screw-type, accepting solid conductors from 2x (0.5... 1.5 mm²) up to max. 2x (0.75... 4 mm²), and stranded conductors from 2x (0.75... 25 mm²). At 40 °C, the minimum permissible conductor size is 16 mm² — this is the thermal derating floor, not a wiring convenience; if you land a smaller wire than 16 mm² at full rated current, the terminal temperature rise may exceed limits. The solid or stranded terminal range is listed as 2x (0.75... 16 mm²), which covers the majority of panel wiring for this frame size.

The IP00 rating on the front and terminals means it is not protected against dust or water ingress — it must be installed inside a suitable enclosure. The substance prohibition date of 05/01/2012 indicates RoHS compliance (the date after which the part was manufactured to comply with the RoHS directive). Electrical life depends on switching duty and current.

Switching frequency and timing

Maximum switching frequency at AC-1 is 1,200 ops/h; at AC-3 it is 1,000 ops/h; at AC-4 it is 300 ops/h.

MPN
3RT1035-1KJ84-0LA0