ABB S3N 3P 150A SACE Isomax MCCB, thermal-magnetic trip, overload & short-circuit protection for industrial low-voltage power distribution.

Product Overview

• Model: S3N 3P 150A（SACE S3 series）
• Brand: ABB, Origin: Italy
• Type: Fixed thermal-magnetic molded case circuit breaker (MCCB)

• FunctionInstalled in low-voltage distribution cabinets, main power panels and motor feed loops. It provides dual protection: thermal protection against circuit overload, instantaneous magnetic protection against short-circuit faults. It cuts off power rapidly during abnormal current to protect cables, motors, PLC/DCS control equipment and downstream electrical loads from burnout. Equipped with manual on/off switch and TEST button for regular function inspection.

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Core Features

1. S3N frame standard breaking capacity, stable breaking performance for conventional factory power distribution
2. Fixed thermal-magnetic trip unit; no adjustable setting, mature and low failure rate
3. Flame-retardant reinforced plastic housing, shockproof, anti-aging, suitable for workshop vibration environment
4. Standard front wiring terminals, compatible with copper cables and busbar connection
5. Comes with test button for periodic function verification; clear ON/OFF mechanical position indication

6. Optional matching accessories: auxiliary contact, shunt release, under-voltage release

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Technical Specifications

• Rated working current In: 150A
• Pole number: 3P (three-phase three-wire)
• Rated AC voltage: 690V AC; 3P DC rated voltage 750V DC
• Breaking capacity Icu (415V AC): 35kAeero
• Trip mode: Fixed TMF thermal-magnetic (thermal 1×In inverse time delay, magnetic 10×In instantaneous trip)
• Installation: Fixed panel mounting / DIN rail mounting
• Overall size: 140mm×85mm×70mm
• Net weight: 1.3kg
• Wire range: Matches copper cable 70~150mm²eero
• Protection Grade: IP20 (indoor cabinet use only)
• HS Code: 85362000

• Supply: New original, tested refurbished available

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Compatibility

• Applicable scenarios: Industrial workshop power distribution, pump/fan motor power supply, automation cabinet incoming power, commercial building distribution
• Matched equipment: Low-voltage complete cabinet, PLC control cabinet, frequency converter incoming circuit

• Direct one-to-one replacement for all S3N 3P 150A batches; cannot interchange with S3H/S3L different breaking capacity models

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Application

• Incoming protection for ABB DCS, PLC, inverter control cabinets
• Overload/short-circuit protection for 3-phase 150A industrial motors, water pumps and fans
• Power distribution branch protection for chemical, metallurgy, water treatment and power plants
• Old distribution cabinet renovation replacement, regular electrical maintenance spare part