5SM36424RC | Siemens Betagard 5SM3 RCCB 25 A, 4 Pole, 300 mA, Type B – Siemens

Name: 5SM36424RC | Siemens Betagard 5SM3 RCCB 25 A, 4 Pole, 300 mA, Type B - Siemens - myelectric.in
Brand: Siemens
SKU: 5SM36424RC
Price: 18115.20 INR
Availability: InStock

SKU: 5SM36424RC

Original price was: ₹50,320.00.Current price is: ₹18,115.20. Excl. GST

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Sourced through authorised channels, the Siemens 5SM36424RC rccb delivers dependable performance for reliable circuit protection and isolation. Key ratings include 25 A, 4 Poles. myelectric.in stocks the 5SM36424RC | Siemens Betagard 5SM3 RCCB 25 A, 4 Pole, 300 mA, Type B 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	5SM36424RC
Category	RCCB
Current Rating	25 A
Poles	4 Poles
Tripping Curve	Curve B
Sensitivity	300 mA
Rated Voltage	415V AC (3-phase 4-wire)
Rated Frequency	50 Hz
Max Break Time	≤ 300 ms at rated IΔn (per IEC 61008-1)
RCD Type	Type AC (sinusoidal AC sensitive)
Protection Function	Earth leakage only — pair with upstream MCB for overcurrent
Mounting	35mm DIN rail (EN 60715)
Test Facility	Built-in test button (monthly test per IS 12640)
Standard	IEC 61008 / IS 12640-1
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

300 mA sensitivity — coarse sensitivity for fire protection on large circuits — must be backed by a 30mA RCCB at the point of use for personnel protection.
25 A rated load current — the RCCB carries this full circuit current continuously while monitoring the live-neutral balance for any earth leakage.
4 Poles — for three-phase four-wire (TN-S/TT) installations; all four conductors pass through the toroidal CT for complete leakage detection.
Earth-leakage protection only — no overload or short-circuit protection; install in series with an appropriately rated MCB for full circuit protection.
Mandatory test button — simulate a leakage fault to verify the trip mechanism without live fault conditions; test monthly per IS 12640 recommendation.
Type AC — designed for purely sinusoidal AC residual currents on standard residential and commercial circuits.
Manufactured to IEC 61008 / IS 12640-1 — 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.

❓ Frequently Asked Questions

Q: What is the significance of the 25 A rating on the 5SM36424RC?

A: The 25 A rating is the device’s maximum continuous current carrying capacity under specified conditions (typically 40°C ambient). For circuit design, use 80% of this value as the design current to allow for derating due to grouping, temperature, and future load growth.

Q: Why is Curve B specified for the 5SM36424RC and what loads is it optimised for?

A: Curve B on the 5SM36424RC trips magnetically at 3–5× rated current, making it ideal for resistive loads such as incandescent lighting, electric heaters, and PTC elements. Using the wrong curve can cause nuisance tripping (too sensitive) or inadequate protection (not sensitive enough). Always match the curve to the load’s inrush characteristics.

Q: Why is the 300 mA sensitivity specified on the 5SM36424RC and when should you choose a different rating?

A: 300 mA is the residual current at which the 5SM36424RC will trip within 300ms. A 30mA sensitivity provides additional shock protection (mandatory for socket circuits per IS 732). 100mA is used for fire protection (no shock protection). 300mA protects feeders without nuisance tripping. Choose based on the circuit’s risk profile — never use >30mA for socket outlet circuits in wet or high-risk locations.

Q: Will the 5SM36424RC trip on earth faults from variable frequency drives (VFDs)?

A: VFDs, LED drivers, and switched-mode power supplies generate high-frequency leakage currents that can cause nuisance tripping in standard Type AC RCCBs. If your installation includes VFDs, use a Type A (for pulsating DC components) or Type F/B RCCB. The 5SM36424RC specification (AC or A type) determines suitability — check the product marking.

Q: How many downstream circuits can be protected under the 5SM36424RC without nuisance tripping?

A: Downstream MCBs or RCBOs can be connected below the 5SM36424RC, but the total standing leakage current of all connected circuits must not exceed 30–50% of the RCCB’s rated sensitivity — typically 9–15mA for a 30mA device. Each appliance with a filter (computers, VFDs, LED drivers) contributes 0.5–3mA of standing leakage, so limit the count of such loads per RCCB to prevent cumulative leakage causing nuisance tripping.