MN 12 Thermal Overload Relay 28-46.5A 415V AC Class 10A | L&T – SB94211OOGO

Name: L&T MN12 Thermal Overload Relay 28-46.5A Class 10A | SB94211OOGO
Brand: Lauritz Knudsen (L&T)
SKU: SB94211OOGO
Price: 12180.00 INR
Availability: OutOfStock

SKU: SB94211OOGO

₹12,180.00 Excl. GST

Out of stock

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📋 Technical Specifications

Parameter	Value
Brand	SB94211OOGO
Part Number / SKU	SB94211OOGO
Category	Overload Relay
Current Rating	28–46.5 A
Voltage Rating	415V AC
Standard	IEC 60947-4-1 / IS 13947-4-1
Certifications	BIS certified where applicable

⚡ Key Features

Adjustable current range 28–46.5 A — set to the motor nameplate FLC for accurate overload detection; range covers multiple motor sizes from a single relay model.
Bimetal thermal element with phase-loss sensitivity — independently monitors each phase; trips if any phase carries more than ~115% of the set current, or on complete phase failure.
Normally open (NO) and normally closed (NC) auxiliary contacts built in — NO contact wired to motor run indicator; NC contact wired to PLC fault input or motor starter stop circuit.
Manufactured to IEC 60947-4-1 / IS 13947-4-1 — 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 SB94211OOGO 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: How do I set the 28–46.5 A adjustable range on the SB94211OOGO for my motor?

A: Turn the setting dial to the motor’s nameplate full-load current (FLC) — the FLC must fall within the 28–46.5 A range of this device. Setting it at the motor FLC (not the maximum of the range) gives correct overload trip timing while still riding through normal starting inrush. If the motor FLC is outside this range, select the adjacent rating in the same series.

Q: Does the SB94211OOGO provide single-phase (phase loss) protection?

A: SB94211OOGO thermal overload relays include single-phase sensitivity: if one phase is lost, the remaining phases carry higher current, causing the bimetal to heat and trip within the specified time. For critical motors, add a dedicated phase-loss relay for faster response independent of load — overload relay phase-loss protection is load-dependent and may take minutes to trip at light load.

Q: How do I set the SB94211OOGO to protect a motor without causing nuisance trips on starting?

A: Set the thermal overload dial to the motor’s nameplate full-load current (FLC) — ensure the FLC is within the 28–46.5 A range of this relay. For star-delta starters, set the overload relay to 58% of motor FLC (line current in delta = FLC × 0.58). Allow 10 trips for the relay’s thermal memory to stabilise before adjusting the setting.

Q: What is the difference between an Overload Relay and a standard MCB — and why use the SB94211OOGO?

A: A standard MCB protects against overload and short-circuit only. An Overload Relay provides thermal overload protection calibrated to motor FLC, protecting the motor from sustained overloads that would destroy windings before a standard MCB trips. Choose the SB94211OOGO when the application specifically requires overload relay characteristics.