Skip to main content
Siemens 3RV6321-4AC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV6321-4AC10 SIRIUS Circuit Breaker, 16 A AC-3, 690

MPN3RV6321-4AC10

Siemens SIRIUS circuit breaker for starter combinations, 3-pole, 16 A AC-3 at 400 V, 690 V rated, size S0, screw terminals, snap-on DIN rail mount.

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

3RV6321-4AC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV6321-4AC10 — Electrical
ParameterValue
Rated operational current (Ie)16 A
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 3690 V
Rated impulse withstand voltage (Uimp)6 kV
Number of poles3
3RV6321-4AC10 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current208 A
Short-circuit trip typemagnetic
Short-circuit protectionYes
3RV6321-4AC10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
3RV6321-4AC10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV6321-4AC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV6321-4AC10 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

Rated 16 A at AC-3 duty (400 V), it handles motor switching up to that current, with an instantaneous magnetic short-circuit trip set at 208 A. That 208 A threshold means it clears faults fast enough to protect downstream contactors and cables without nuisance tripping on normal motor inrush.

Snap-on mounting onto 35 mm DIN rail per DIN EN 60715, with screw terminals for the main circuit accepting 2x (1…2.5 mm²) solid or stranded, or 2x (2.5…10 mm²). Size S0 frame — 45 mm wide, 97 mm tall, 96 mm deep — fits standard panel cutouts. Mount in any position, ambient -20 to +60 °C operating.

Frequently asked questions

What is 3RV6321-4AC10's instantaneous short-circuit trip setting?

The magnetic short-circuit trip responds at 208 A, sized to clear faults without tripping on motor inrush.

Where can I buy 3RV6321-4AC10?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

MPN
3RV6321-4AC10