S203MT-Z4NA

Name: S203MT-Z4NA
Brand: ABB
SKU: S203MT-Z4NA

The ABB S203MT-Z4NA is a high-performance miniature circuit breaker designed for reliable electrical protection. It features a 4-pole configuration, screw terminal type, and a tripping characteristic of Z. Suitable for a wide range of applications, this breaker ensures safe and efficient operation.

Product ModelS203MT-Z4NA

Material Number2CDS273446R0338

Product ID80458

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe ABB S203MT-Z4NA offers robust protection against electrical faults, ensuring the safety of your equipment and personnel.
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2. High PerformanceDesigned for efficient operation, this miniature circuit breaker provides reliable performance under various conditions, including high ambient temperatures.
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3. Versatile ApplicationSuitable for a wide range of applications, from industrial to commercial settings, the S203MT-Z4NA is a versatile solution for electrical protection needs.
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4. Durable ConstructionBuilt with high-quality materials, this circuit breaker is designed to withstand the rigors of continuous use, ensuring long-lasting performance.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Standards

IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 No. 235

Tripping Characteristic

Rated Voltage (Ur)

440 V

Rated Operational Voltage

acc. to IEC 60898-1 440 V acc. to IEC 60947-2 230 V

Operational Voltage

Maximum (Incl. Tolerance) 253 V AC Maximum (Incl. Tolerance) 66 V DC Minimum 12 V AC Minimum 12 V DC

Rated Insulation Voltage (Ui)

5. Compliance with StandardsMeets international standards such as IEC/EN 60898-1 and IEC/EN 60947-2, ensuring compliance with global safety regulations.

acc. to IEC/EN 60664-1 440 V

Rated Impulse Withstand Voltage (Uimp)

4 kV at 2000 m 5 kV at Sea Level 6.2 kV

Dielectric Test Voltage

50/60 Hz-1 min: 2 kV

Input Voltage Type

Rated Current (In)

4 A

Rated Short-Circuit Capacity

10 kA (230 V) 10 kA (400 V) 10 kA

Rated Ultimate Short-Circuit Breaking Capacity (Icu)

15 kA (230 V) 15 kA (400 V) 15 kA

Rated Service Short-Circuit Breaking Capacity (Ics)

11.2 kA

Rated Frequency (f)

50 / 60 Hz

Power Loss

9.6 W

Energy Limiting Class

Mechanical Endurance

20000 cycle

Number of Protected Poles

Number of Poles

3+N

Number of Modular Spacings per DIN Rail

Overvoltage Category

III

Tightening Torque

2.8 NÂ·m

Screw Terminal Type

Failsafe Bi-directional Cylinder-lift Terminal

Actuator Marking

I / O

Actuator Material

Insulation Group II, Black, Sealable

Housing Material

Insulation Group I, RAL 7035

Mounting on DIN Rail

TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715

Mounting Position

any

Recommended Screw Driver

Pozidriv 2

Accessories Available

Yes

Connecting Capacity

Busbar 10 / 10 mmÂ² Flexible with Ferrule 0.75 ... 16 mmÂ² Flexible 0.75 ... 25 mmÂ² Flexible 0.75 ... 25 mmÂ² Rigid 0.75 ... 35 mmÂ² Stranded 0.75 ... 35 mmÂ²

Installation Size

acc. to DIN 43880 3

Terminal Type

Screw Terminals

Ambient Air Temperature

Operation -40 ... +70 Â°C Storage -40 ... 75 Â°C

Degree of Protection

Enclosure with Cover IP20

Pollution Degree

Environmental Conditions

28 cycles with 55 Â°C / 90-96 % and 25 Â°C / 95-100 %

Resistance to Vibrations

20 Cycles with Load 0.8 In: 5g 5 ... 150 ... 5 Hz

Resistance to Shock acc. to IEC 60068-2-27

25g 2 shocks 13 ms

Width in Number of Modular Spacings

4.0

Product Net Width

70 mm

Product Net Height

88 mm

Product Net Depth / Length

69 mm

Product Net Weight

0.5 kg

Pole Net Weight

0.115 kg

Built-In Depth (t2)

69 mm

ETIM 8

EC000042 - Miniature circuit breaker (MCB)

ETIM 9

EC000042 - Miniature circuit breaker (MCB)

WEEE Category

5. Small Equipment (No External Dimension More Than 50 cm)

WEEE B2C / B2B

Business To Business

CN8

8536 20 10

UNSPSC

39121603

eClass

V11.0 : 27141901

IDEA Granular Category Code (IGCC)

4897 >> Miniature circuit breakers

Object Classification Code

Manufacturer ID

2CDS273446R0338