AU RCCB 63A FP 415V Adi 30mA | L&T – AURAD406303

Name: L&T 63A 415V 30mA FP RCCB | AURAD406303
Brand: Lauritz Knudsen (L&T)
SKU: AURAD406303
Price: 4625.30 INR
Availability: BackOrder

SKU: AURAD406303

Original price was: ₹10,055.00.Current price is: ₹4,625.30. Excl. GST

Available on back-order

13 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

The AURAD406303 AURAD406303 is a rccb, engineered for reliable circuit protection and isolation in demanding Indian and international installations. Key ratings include 63 A, 415V AC, 4 Poles. Buy the AU RCCB 63A FP 415V Adi 30mA | L&T online at myelectric.in with GST invoice, genuine-product assurance, and fast delivery across India — bulk and worldwide export enquiries welcome.

📋 Technical Specifications

Parameter	Value
Brand	AURAD406303
Part Number / SKU	AURAD406303
Category	RCCB
Current Rating	63 A
Voltage Rating	415V AC
Poles	4 Poles
Sensitivity	30 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

30 mA sensitivity — standard personnel shock protection — trips before a lethal current (>50mA) can flow through the body (IEC 61008).
63 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 AURAD406303 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 63 A rating on the AURAD406303?

A: The 63 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 30 mA sensitivity specified on the AURAD406303 and when should you choose a different rating?

A: 30 mA is the residual current at which the AURAD406303 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 AURAD406303 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 AURAD406303 specification (AC or A type) determines suitability — check the product marking.

Q: How many downstream circuits can be protected under the AURAD406303 without nuisance tripping?

A: Downstream MCBs or RCBOs can be connected below the AURAD406303, 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 AURAD406303?

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 AURAD406303 when the application specifically requires rccb characteristics.