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Siemens 5SM3448-0 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM3448-0 SENTRON RCCB, 4-Pole, 100 A, 100 mA, 400 V

MPN5SM3448-0

Siemens SENTRON RCCB, 4-pole, type AC, instantaneous, 100 A rated current, 100 mA residual sensitivity, 400 V AC, 50 Hz.

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

5SM3448-0 — Electrical Ratings
ParameterValue
Number of poles4
5SM3448-0 — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3448-0 — Other specifications
ParameterValue
Value range of the supply voltage at AC400 V
Value range of the supply voltage frequency50 Hz

Product details

Siemens 5SM3448-0 SENTRON RCCB — 4-Pole, 100 A, 100 mA, Type AC

The Siemens 5SM3448-0 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated for 100 A at 400 V AC, 50 Hz, with a 100 mA residual current sensitivity and instantaneous (type AC) tripping characteristic. Type AC detection responds to sinusoidal AC residual currents only. The 100 mA sensitivity provides supplementary protection against fire risk from earth faults. Rated for 100 A continuous load, this RCCB is sized for heavy sub-distribution or main incomer duty in commercial and industrial panelboards.

Panel Integration

Snap-on DIN rail mounting for standard 35 mm rail. The 4-pole width occupies four modular units (72 mm) in the enclosure. Spring-cage or screw terminals accept conductors up to the rated cross-section for 100 A; verify lug sizing against the panel's gland plate and fill factor.

Frequently asked questions

What are the key ratings of 5SM3448-0?

4-pole RCCB, type AC (sinusoidal residual current only), 100 A rated current, 100 mA residual sensitivity, 400 V AC, 50 Hz, instantaneous tripping.

Will 5SM3448-0 drop into a panel specified around 5SQ2670-2YA63?

No — the 5SQ2670-2YA63 is a 4-pole MCB (miniature circuit breaker) with a 63 A rating and C-curve overcurrent protection, while the 5SM3448-0 is an RCCB with 100 A rating and no overcurrent protection. They serve different functions and are not drop-in substitutes without rewiring.

MPN
5SM3448-0