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Schneider Electric C16B4 — Miniature Circuit Breakers (MCB)

Schneider Electric C16B4 ComPacT NSX160B Basic Frame, 160A,

MPNC16B4
Active

Schneider Electric ComPacT NSX series, NSX160B basic frame, C16B4, 160 A frame rating, 4 poles, 25 kA Icu at 415 V AC, toggle control, fixed mount.

$184.39 – $287.74Ref. price · indicative, final on quote
Schneider Electric C16B4 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

C16B4 — Identification
ParameterValue
Product nameComPacT NSX
Product rangeComPacT
Product/component typeBasic frame
Device applicationDistribution
C16B4 — Ratings
ParameterValue
Rated current (In)160 A at 40 °C
Poles configuration4P
Breaking capacity15 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-2 20 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-2 25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 40 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)20 kA at 440 V AC 50/60 Hz conforming to IEC 60947-2 25 kA at 380/415 V AC 50/60 Hz conforming to IEC 60947-2 40 kA at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 15 kA at 500 V AC 50/60 Hz conforming to IEC 60947-2
Rated operational voltage (Ue)690 V AC 50/60 Hz conforming to IEC 60947-2
Rated insulation voltage (Ui)800 V AC 50/60 Hz conforming to IEC 60947-2
Rated impulse withstand voltage (Uimp)8 kV conforming to IEC 60947-2
Network type (AC/DC)AC
Network frequency50/60 Hz
Utilisation categoryCategory A
Overvoltage categoryIII
C16B4 — Protection
ParameterValue
Suitability for isolationYes conforming to EN/IEC 60947-2
Electrical durability (cycles)40000 cycles 440 V AC 50/60 Hz In/2 conforming to IEC 60947-2 15000 cycles 690 V AC 50/60 Hz In/2 conforming to IEC 60947-2 20000 cycles 440 V AC 50/60 Hz In conforming to IEC 60947-2 7500 cycles 690 V AC 50/60 Hz In conforming to IEC 60947-2
Mechanical durability (cycles)40000 cycles conforming to IEC 60947-2
C16B4 — Mechanical
ParameterValue
Mounting supportBackplate
Mounting modeFixed
Control typeToggle
C16B4 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-50...85 °C
IP degree of protectionIP40 conforming to IEC 60529
Pollution degree3 conforming to IEC 60664-1
C16B4 — Approvals
ParameterValue
StandardsEN/IEC 60947-2 UL 60947-4-1

Product details

What this basic frame gives you

It ships without a trip unit, so you pair it with the appropriate electronic or thermal-magnetic trip module for your load. At 440 V AC it still holds 20 kA Icu; at 500 V AC it drops to 15 kA. That's a solid selectivity window for a 160 A panel feeder.

It's a panel-mount breaker, not a DIN-rail snap-on, so plan for screw-down mounting and busbar takeoffs.

Mechanical durability is 40,000 cycles per IEC 60947-2. Electrical durability varies with voltage and load: 40,000 cycles at 440 V AC at half rated current (In/2), 20,000 cycles at full In at 440 V AC, and 7,500 cycles at 690 V AC at full In. That's a lot of switching for a distribution breaker — it's not just a backup isolator, it's rated for regular load switching.

Frequently asked questions

Where can I buy C16B4 and how do I get a price?

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

What is C16B4's breaking capacity at 415 V AC?

25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-2. The service breaking capacity (Ics) at that voltage is also 25 kA.

What compliance documentation does this breaker carry?

Certified to EN/IEC 60947-2 and UL 60947-4-1. Suitable for isolation per EN/IEC 60947-2. Class II shock protection on the front face. Pollution degree 3 per IEC 60664-1.

MPN
C16B4