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Siemens 3RQ4128-1AB30 — Motor Control Accessories

Siemens 3RQ4128-1AB30 SIRIUS 3RQ4 Coupling Relay, 24 V AC/DC

MPN3RQ4128-1AB30
Active

Siemens SIRIUS 3RQ4 coupling relay, 3RQ4128-1AB30, H-0-A coupler with plug-in relay, 24 V AC/DC, 1 change-over contact, screw terminal, 6.2 mm width, 6 A thermal current.

Siemens 3RQ4128-1AB30 datasheet (PDF)
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Specifications

3RQ4128-1AB30 — Specifications
ParameterValue
Group codeR711
Product group4950
Product classA: Standard product which is a stock item could be returned within the returns guidelines/period.
SeriesSIRIUS 3RQ4 coupling relays, narrow design
Export control regulationsAL : N / ECCN : N
Compliance with the substance restrictions according to RoHS directiveSince: 26-09-24

Product details

The Siemens 3RQ4128-1AB30 is a SIRIUS 3RQ4 coupling relay in the narrow 6.2 mm housing. It's an H-0-A coupler with a plug-in relay, meaning it integrates a manual Hand-Off-Auto switch directly into the relay package — a common setup for local override of automated control signals in a panel. Rated for 24 V AC/DC coil supply and a thermal current of 6 A through its single change-over contact.

RoHS compliant since 26 September 2024, with REACH Article 33 information available. No UL or CSA listing appears in the spec record, so if a panel requires those marks, verify the specific project's acceptance criteria before committing the BOM line.

Integration Notes

Screw terminal connections — strip length and torque per standard Siemens terminal specs for the 3RQ4 family. Plug-in relay base means the relay itself can be swapped without rewiring the base terminals.

Frequently asked questions

What compliance documentation is available for this part?

RoHS compliance is confirmed since 26 September 2024. REACH Article 33 duty-to-inform information is available per the current candidate list. No UL, CSA, or IEC certification marks are listed in the spec record.

What is the group code and product group for this part?

The group code is R711 and the product group is 4950. These are Siemens internal classification codes used for catalog sorting and cross-reference lookups.

MPN
3RQ4128-1AB30