5SY44167 | Miniature circuit breaker 400 V 10kA, 4pole, C, 16A, D=70 mm Siemens

Name: 5SY44167 | Miniature circuit breaker 400 V 10kA, 4pole, C, 16A, D=70 mm Siemens - myelectric.in
Brand: Siemens
SKU: 5SY44167

SKU: 5SY44167

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📋 Technical Specifications

Parameter	Value
Brand	Siemens
Part Number / SKU	5SY44167
Category	Miniature Circuit Breaker (MCB)
Current Rating	16 A
Voltage Rating	400V AC
Poles	4 Poles
Breaking Capacity	10 kA
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

Protects circuits at 16 A with 10 kA short-circuit breaking capacity — rated for light industrial and commercial distribution boards.
4 Poles — protects a three-phase four-wire circuit with switched neutral; fits standard 35mm DIN rail in distribution boards.
Thermal-magnetic trip mechanism — bimetal element trips on sustained overload, instantaneous magnetic trip on short-circuit; two independent protection functions in one compact module.
Manufactured to IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial) — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified, CE, cULus (select models) — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised Siemens product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

❓ Frequently Asked Questions

Q: What load can the 5SY44167 protect at its rated 16 A?

A: The 5SY44167 is rated to carry and protect circuits up to 16 A continuously. For motor loads, ensure the full-load current (FLC) of the motor does not exceed this rating. For resistive loads (heaters, lighting), the 16 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 10 kA breaking capacity on the 5SY44167 mean in practice?

A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the 5SY44167 can safely interrupt without damage. Before installing, verify that the prospective fault level at the installation point does not exceed 10 kA — this is checked using a fault level calculation or from the upstream transformer impedance data. Installing a breaker with insufficient breaking capacity is a serious safety violation.

Q: Is the 5SY44167 suitable for both single-phase and three-phase systems?

A: The 5SY44167 with 4 Poles can protect three-phase circuits. Each pole simultaneously interrupts one phase — ensuring all phases are de-energised on a fault.

Q: Can the 5SY44167 be DIN rail mounted in any standard distribution board?

A: Yes. This Siemens MCB uses the standard 35mm EN 60715 DIN rail and 17.5mm module width, making it compatible with all major brand distribution boards and enclosures. Terminal capacity accommodates both rigid and flexible conductors up to the rated cross-section.

Q: What happens when the 5SY44167 trips — how do I identify and reset it?

A: When the 5SY44167 trips on fault, the handle moves to a midway position (between ON and OFF), distinctly visible from a distance. To reset: (1) identify and rectify the fault, (2) push the handle fully to OFF, (3) then switch back to ON. Never force-reset without investigating the fault cause.