Higher Rating RCCB FP 300 mA – 100 A Havells | DHRMCMFF300100

Name: Havells 300mA 100A RCCB | DHRMCMFF300100
Brand: Havells
SKU: DHRMCMFF300100
Price: 5029.75 INR
Availability: OutOfStock

SKU: DHRMCMFF300100

Original price was: ₹9,145.00.Current price is: ₹5,029.75. Excl. GST

Out of stock

12 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 Higher Rating RCCB FP 300 mA? This genuine 100 A Havells | DHRMCMFF300100 rccb is built for reliable circuit protection and isolation, combining proven reliability with full compliance to applicable IEC/IS standards. Key ratings include 100 A, 4 Poles. Order part number DHRMCMFF300100 from myelectric.in — a trusted 100 A Havells | DHRMCMFF300100 supplier offering competitive pricing, GST billing, and shipping across India and overseas.

📋 Technical Specifications

Parameter	Value
Brand	100 A Havells \| DHRMCMFF300100
Part Number / SKU	DHRMCMFF300100
Category	RCCB
Current Rating	100 A
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 where applicable

⚡ 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.
100 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 where applicable — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised 100 A Havells | DHRMCMFF300100 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 100 A rating on the DHRMCMFF300100?

A: The 100 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 the 300 mA sensitivity specified on the DHRMCMFF300100 and when should you choose a different rating?

A: 300 mA is the residual current at which the DHRMCMFF300100 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 DHRMCMFF300100 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 DHRMCMFF300100 specification (AC or A type) determines suitability — check the product marking.

Q: How many downstream circuits can be protected under the DHRMCMFF300100 without nuisance tripping?

A: Downstream MCBs or RCBOs can be connected below the DHRMCMFF300100, 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: What is the difference between an RCCB and a standard MCB — and why use the DHRMCMFF300100?

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 DHRMCMFF300100 when the application specifically requires rccb characteristics.