ABB S500 series miniature circuit breaker

ABB S500 series miniature circuit breaker

product overview

Positioning: The S500 series is a high-performance miniature circuit breaker (MCB) that complies with UL 1077 standards and is used for circuit protection, supporting both alternating current (AC) and direct current (DC) systems.

Core function: Provides thermal magnetic trip protection, with high breaking capacity and fast breaking time (2.3-2.5s), suitable for overload and short circuit protection of industrial and commercial circuits.

Model and Technical Parameters

S500 (AC model)

Voltage range:

UL standard: 600Y/277 VAC

IEC standard: 690 VAC

Current range: 0.1-45 A (unipolar/bipolar/triode)

Tripping characteristics: Only K-curve (applicable to inductive loads, allowing high surge currents during startup, such as motors and transformers).

Breaking capacity: up to 30 kA (UL 1077/CSA C22.2).

S500UC (DC model)

Voltage range:

Single pole: 250 VDC

Quadrupole: 750 VDC

Current range: 0.1-63 A (unipolar/bipolar/triode/quadrupole)

Release characteristics: B curve (applicable to DC inductive loads) and K curve (optional).

Breaking capacity: up to 30 kA (UL 1077/CSA C22.2).

Core features

Design and Installation

Rail installation: Supports 35mm DIN rail installation, saving space.

Safe terminals: designed to prevent electric shock (Finger safe terminals), supporting multi-functional terminal connections.

Compact size: The width of a single pole is about 17.5mm, and the width of a multi pole model increases proportionally (such as 35mm for 2-pole and 52.5mm for 3-pole).

Protection function

Thermal magnetic trip: Combined with overload (thermal) and short circuit (magnetic) protection, it responds quickly.

Adjustable trip unit: supports current regulation and adapts to different load requirements.

Certification and Compliance

Compliant with UL 1077, CSA C22.2, IEC 60497-2 and other standards, with CE certification.

Model specifications and prices (some examples)

Model, Pole, Current Range, Catalog Number, Price (Example)

S500-K 1 2.8–4.2 A S501-K4.2

S500UC-B 1 6 A S501UC-B6

S503-K4.2 3 2.8–4.2 A S503-K4.2

S504UC-K4.2 4 2.8–4.2 A S504UC-K4.2

Attachments and extensions

Auxiliary contacts

Provide status feedback (such as on-off signals), supporting 1 normally open/1 normally closed (S500-H11) or 2 normally open (S500-H20)

Bell alarm

Trigger alarm when tripping, with test button (such as S500-S11)

Handle mechanism

Used for manual operation (S500-RD3)