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Siemens 5SU1844-6WK82 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU1844-6WK82 SENTRON RCBO, 4P, 125A, 10kA, Type A

MPN5SU1844-6WK82
Active

Siemens SENTRON selective RCBO, 4-pole, 125 A (30 °C), 10 kA, Type A, 1000 mA, B-curve, 11 MW, IP20.

Siemens 5SU1844-6WK82 datasheet (PDF)
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

5SU1844-6WK82 — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SU1844-6WK82 — Identification
ParameterValue
Product designationRCBO
Product design / constructionselective
5SU1844-6WK82 — Mechanical
ParameterValue
Mounting positionany
Width in modular units11
Maximum75 °C
Minimum-40 °C
Width198 mm
Height90 mm
Depth77 mm
Installation depth70 mm
5SU1844-6WK82 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SU1844-6WK82 — Electrical
ParameterValue
Tripping Characteristic ClassB

Product details

Selective 4-pole RCBO for main feeder protection

The Siemens 5SU1844-6WK82 is a SENTRON selective RCBO rated 125 A at 30 °C, with a 10 kA breaking capacity per EN 60898 and IEC 60947-2. The 4-pole, Type A residual-current unit trips at 1000 mA, and the B-curve overcurrent characteristic handles moderate inrush from resistive and light motor loads. The selective design (time-delayed) means it coordinates with downstream 30 mA or 300 mA RCDs, so only the faulted branch drops out — the main feeder stays live. Panel builders mount this in the distribution board; the 11 modular-width (198 mm) footprint fits standard DIN-rail enclosures.

Rated current derating across temperature

At 40 °C the continuous current drops to 115.62 A, at 50 °C to 106.25 A, and at 60 °C to 96.25 A. For a panel that runs warm — say a 50 °C internal ambient — size the upstream cable and busbar for 106 A, not the nameplate 125.

Dimensions: 198 mm wide (11 modular units), 90 mm tall, 77 mm deep, with a 70 mm installation depth into the enclosure. The supply can enter from either top or bottom, and the mounting position is unrestricted.

Frequently asked questions

Where can I buy 5SU1844-6WK82?

This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — stock and lead time are confirmed at quote time.

What is the closest functional second-source to 5SU1844-6WK82?

The Siemens 5SL6550-7BB is a 4-pole RCBO with similar breaking capacity, but it is non-selective (instantaneous trip) and typically has a different residual-current rating. The 5SU1844-6WK82's selective time-delay is designed for main feeder coordination — the 5SL series is for sub-feed or branch protection. They are not drop-in replacements without reviewing the coordination study.

What compliance documentation does Siemens provide for 5SU1844-6WK82?

The part carries ratings per EN 60898 and IEC 60947-2, and is designated as halogen-free and silicon-free. The manufacturer provides standard declaration of conformity and product documentation; specific RoHS/REACH certificates are available from the supplier upon request.

Will 5SU1844-6WK82 drop into a panel specified around 5SL6550-7BB without rewiring?

Not without checking the coordination study. Both are 4-pole, 11-module-wide RCBOs that mount on the same DIN rail, but the 5SU1844-6WK82 is selective (time-delayed) with a 1000 mA trip, while the 5SL6550-7BB is non-selective with a different trip rating. The physical footprint matches, but the protection scheme changes.

MPN
5SU1844-6WK82