Legrand RX3 40A 2 Pole 30mA RCCB | 4024 89

Name: Legrand RX3 40A 2 Pole 30mA RCCB | 4024 89 - myelectric.in
Brand: Legrand
SKU: 4024 89

SKU: 4024 89

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The Leading Brand 4024 89 is a rccb, engineered for reliable circuit protection and isolation in demanding Indian and international installations. Key ratings include 40 A, 2 Poles. Buy the Legrand RX3 40A 2 Pole 30mA RCCB | 4024 89 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	Leading Brand
Part Number / SKU	4024 89
Category	RCCB
Current Rating	40 A
Poles	2 Poles
Sensitivity	30 mA
Rated Voltage	230V AC
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).
40 A rated load current — the RCCB carries this full circuit current continuously while monitoring the live-neutral balance for any earth leakage.
2 Poles — for single-phase circuits; both live and neutral pass through the sensing core.
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 Leading Brand 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 40 A rating on the 4024 89?

A: The 40 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 4024 89 and when should you choose a different rating?

A: 30 mA is the residual current at which the 4024 89 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 4024 89 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 4024 89 specification (AC or A type) determines suitability — check the product marking.

Q: How many downstream circuits can be protected under the 4024 89 without nuisance tripping?

A: Downstream MCBs or RCBOs can be connected below the 4024 89, 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 4024 89?

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 4024 89 when the application specifically requires rccb characteristics.