4A TP D Optipro AC MCB – Indoasian

Name: Indoasian 4A TP D Optipro AC MCB - 811309
Brand: Indoasian
SKU: 811309
Price: 2685.00 INR
Availability: InStock

SKU: 811309

₹2,685.00 Excl. GST

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The Indoasian 811309 is a miniature circuit breaker (mcb), engineered for reliable circuit protection and isolation in demanding Indian and international installations. Key ratings include 4 A, 3 Poles. Buy the 4A TP D Optipro AC MCB 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	Indoasian
Part Number / SKU	811309
Category	Miniature Circuit Breaker (MCB)
Current Rating	4 A
Poles	3 Poles
Rated Voltage	230/400V AC
Rated Frequency	50/60 Hz
Trip Mechanism	Thermal-magnetic (bimetal overload + electromagnetic short-circuit)
Mounting	35mm DIN rail (EN 60715)
Width	54 mm (3 × 18mm modules)
Electrical Endurance	≥ 20,000 operating cycles (per IEC 60898-1)
Pollution Degree	3 (per IEC 60664-1)
Standard	IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial)
Certifications	BIS certified (ISI mark)

⚡ Key Features

4 A rated current — provides overload and short-circuit protection for the connected circuit.
3 Poles — protects a three-phase circuit without neutral; fits standard 35mm DIN rail in distribution boards.
Thermal-magnetic trip mechanism — bimetal element trips on sustained overload, instantaneous magnetic trip on short-circuit; two independent protection functions in one compact module.
Manufactured to IS 8828 / IEC 60898-1 (residential) and IEC 60947-2 (industrial) — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified (ISI mark) — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised Indoasian 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: What load can the 811309 protect at its rated 4 A?

A: The 811309 is rated to carry and protect circuits up to 4 A continuously. For motor loads, ensure the full-load current (FLC) of the motor does not exceed this rating. For resistive loads (heaters, lighting), the 4 A rating is used directly. Derate by 20% for ambient temperatures above 40°C.

Q: Can the 811309 be DIN rail mounted in any standard distribution board?

A: Yes. This Indoasian MCB uses the standard 35mm EN 60715 DIN rail and 17.5mm module width, making it compatible with all major brand distribution boards and enclosures. Terminal capacity accommodates both rigid and flexible conductors up to the rated cross-section.

Q: What happens when the 811309 trips — how do I identify and reset it?

A: When the 811309 trips on fault, the handle moves to a midway position (between ON and OFF), distinctly visible from a distance. To reset: (1) identify and rectify the fault, (2) push the handle fully to OFF, (3) then switch back to ON. Never force-reset without investigating the fault cause.

Q: Is the 811309 suitable for both single-phase and three-phase systems?

A: The 811309 with 3 Poles can protect three-phase circuits. Each pole simultaneously interrupts one phase — ensuring all phases are de-energised on a fault.