1SYF204015R3250 | FB204 AC-25/0.3; Residual Current Circuit Breaker; 4P; 25A; 300mA; AC-Type – ABB

Name: 1SYF204015R3250 | FB204 AC-25/0.3; Residual Current Circuit Breaker; 4P; 25A; 300mA; AC-Type - ABB - myelectric.in
Brand: ABB
SKU: 1SYF204015R3250
Price: 2548.00 INR
Availability: InStock

SKU: 1SYF204015R3250

Original price was: ₹6,370.00.Current price is: ₹2,548.00. Excl. GST

17 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

Looking for the 1SYF204015R3250 | FB204 AC-25/0.3; Residual Current Circuit Breaker; 4P; 25A; 300mA; AC-Type? This genuine ABB rccb is built for reliable circuit protection and isolation, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 4 Poles. Order part number 1SYF204015R3250 from myelectric.in — a trusted ABB supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	ABB
Part Number / SKU	1SYF204015R3250
Category	RCCB
Poles	4 Poles
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, KEMA tested

⚡ 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.
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, KEMA tested — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised ABB 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: Why is the 300 mA sensitivity specified on the 1SYF204015R3250 and when should you choose a different rating?

A: 300 mA is the residual current at which the 1SYF204015R3250 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: How many downstream circuits can be protected under the 1SYF204015R3250 without nuisance tripping?

A: Downstream MCBs or RCBOs can be connected below the 1SYF204015R3250, 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.

Q: Will the 1SYF204015R3250 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 1SYF204015R3250 specification (AC or A type) determines suitability — check the product marking.

Q: What is the difference between an RCCB and a standard MCB — and why use the 1SYF204015R3250?

A: A standard MCB protects against overload and short-circuit only. An RCCB adds earth leakage (residual current) detection — it trips on faults as low as 30mA to ground, protecting against electric shock and fire from insulation faults, which a standard MCB cannot detect. Choose the 1SYF204015R3250 when the application specifically requires rccb characteristics.