5SL51257RC | Betagard DC MCB 25 A, 1 Pole, 10 kA, C-Curve – Siemens

Name: 5SL51257RC | Betagard DC MCB 25 A, 1 Pole, 10 kA, C-Curve - Siemens
Brand: Siemens
SKU: 5SL51257RC
Availability: InStock

SKU: 5SL51257RC

Original price was: ₹1,105.00.Current price is: ₹508.30. Excl. GST

18 People watching this product now!

Order protection

Buy with complete confidence.

We back each order with genuine supply, on-time dispatch and GST or commercial invoicing as required.

Buyer protection on every order

Global DeliveryShipped pan-India and to export markets.

On-Time DeliveryPacked and dispatched on schedule.

100% OriginalFrom brand-authorised channels only.

GST InvoiceCompliant, ITC-ready tax invoice.

Secure PaymentEncrypted, trusted payment gateways.

Also included Dedicated account manager Technical support Bulk & business pricing 3-day replacement

Sourced through authorised channels, the Siemens 5SL51257RC miniature circuit breaker (mcb) delivers dependable performance for reliable circuit protection and isolation. Key ratings include 25 A, 1 Pole. myelectric.in stocks the 5SL51257RC | Betagard DC MCB 25 A, 1 Pole, 10 kA, C-Curve for contractors, panel builders, and project buyers — buy online with GST invoice, or request a bulk quote for domestic supply and export to UAE, Singapore, UK, USA, Sri Lanka and more.

📋 Technical Specifications

Parameter	Value
Brand	Siemens
Part Number / SKU	5SL51257RC
Category	Miniature Circuit Breaker (MCB)
Current Rating	25 A
Poles	1 Pole
Breaking Capacity	10 kA
Rated Voltage	230/400V AC
Rated Frequency	50/60 Hz
Trip Mechanism	Thermal-magnetic (bimetal overload + electromagnetic short-circuit)
Mounting	35mm DIN rail (EN 60715)
Width	18 mm (1 × 18mm modules)
Electrical Endurance	≥ 20,000 operating cycles (per IEC 60898-1)
Pollution Degree	3 (per IEC 60664-1)
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

Protects circuits at 25 A with 10 kA short-circuit breaking capacity — rated for light industrial and commercial distribution boards.
1 Pole — protects a single-phase final circuit; 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 5SL51257RC protect at its rated 25 A?

A: The 5SL51257RC is rated to carry and protect circuits up to 25 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 25 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: What does the 10 kA breaking capacity on the 5SL51257RC mean in practice?

A: Breaking capacity (10 kA) is the maximum prospective short-circuit current the 5SL51257RC 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: What happens when the 5SL51257RC trips — how do I identify and reset it?

A: When the 5SL51257RC 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.

Q: Is the 5SL51257RC suitable for both single-phase and three-phase systems?

A: The 5SL51257RC is a 1 pole device for single-phase circuits. For three-phase circuits, use a 3-pole or 4-pole MCB of the same series.

Q: Can the 5SL51257RC 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.