B4.85

Schneider Electric

Schneider Electric B4.85 Overload Thermal Unit Heating Element

SKU B4.85

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: Schneider Electric
  • Product No.: B4.85
  • Origin France
  • Product Type: Thermal Overload Heating Elements
  • Payment: T/T, Western Union
  • Weight: 0.04 kg
  • Shipping port: Xiamen
  • Warranty: 12 months

Tags

Thermal Overload Heating Elements
Quantity
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Product Description

Description

The B4.85 is a thermal overload relay heating element manufactured by Schneider Electric, designed for use with traditional NEMA-style motor starters. This component acts as the sensing element for thermal overload relays, providing essential motor protection by monitoring the current flow. When the motor draws excessive current for a prolonged duration, the heating element generates heat proportional to the current, triggering the thermal relay mechanism to open the control circuit and prevent motor damage due to overheating. It is a critical component for maintaining the operational integrity of electric motors in industrial control systems.

Features

  • Thermal Sensing: Provides accurate current-to-heat conversion for reliable overload detection.
  • Compatibility: Engineered for integration into standard Schneider Electric/Square D NEMA thermal overload relay housings.
  • Operational Reliability: Ensures consistent motor protection performance in heavy-duty industrial applications.
  • Durable Construction: Built to meet industrial standards for electrical components.

Applications

  • Protection of three-phase AC motors in industrial starters.
  • HVAC systems, pumps, and conveyor motor protection.
  • Maintenance and repair of legacy electrical starter assemblies.
  • Overload protection in motor control centers (MCCs).

Technical Specifications

Category Specification
Manufacturer Schneider Electric
Brand Schneider Electric
Product Type Overload thermal unit heating element
Product Phase Phase-Out
Weight 0.04 kg
Commodity Code 85371099

Installation Guidelines

  • Correct Sizing: Ensure the B4.85 heating element is correctly selected based on the motor's full-load current (FLC) rating as specified by the motor manufacturer’s tables provided for the thermal overload relay.
  • Mounting: Insert the heating element into the thermal overload block, ensuring the mounting screws are tightened to the specified torque to prevent high-resistance contact points.
  • Inspection: Periodically inspect the heating element for signs of discoloration or terminal looseness caused by thermal cycling.
  • Safety: Always disconnect power to the motor starter before removing or installing thermal heating elements to prevent electrical shock.
  • Environment: Operate within a clean, dry control panel to ensure the thermal characteristics of the unit are not compromised by ambient dust or humidity.
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
FAQ
What is the function of the B4.85 heating element?
It serves as the sensing component in a thermal overload relay, translating motor current into heat to trip the protection mechanism during an overload condition.
How do I choose the correct heating element for my motor?
You must select the specific heating element (like the B4.85) by cross-referencing your motor's full-load current (FLC) with the manufacturer's selection table provided with the motor starter.
Is the B4.85 unit still in production?
No, this component is currently in the Phase-Out product phase.
Reviews

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B4.85

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Schneider Electric B4.85 Overload Thermal Unit Heating Element

Only 5 item(s) left in stock

  • Manufacturer: Schneider Electric

  • Product No.: B4.85

  • Country of origin:France

  • Product Type: Thermal Overload Heating Elements

  • Payment: T/T, Western Union

  • Weight: 40g

  • Shipping port: Xiamen

  • Warranty: 12 months

View full details
Product Description
FAQ
Shipping Returns
Additional details
Reviews

Description

The B4.85 is a thermal overload relay heating element manufactured by Schneider Electric, designed for use with traditional NEMA-style motor starters. This component acts as the sensing element for thermal overload relays, providing essential motor protection by monitoring the current flow. When the motor draws excessive current for a prolonged duration, the heating element generates heat proportional to the current, triggering the thermal relay mechanism to open the control circuit and prevent motor damage due to overheating. It is a critical component for maintaining the operational integrity of electric motors in industrial control systems.

Features

  • Thermal Sensing: Provides accurate current-to-heat conversion for reliable overload detection.
  • Compatibility: Engineered for integration into standard Schneider Electric/Square D NEMA thermal overload relay housings.
  • Operational Reliability: Ensures consistent motor protection performance in heavy-duty industrial applications.
  • Durable Construction: Built to meet industrial standards for electrical components.

Applications

  • Protection of three-phase AC motors in industrial starters.
  • HVAC systems, pumps, and conveyor motor protection.
  • Maintenance and repair of legacy electrical starter assemblies.
  • Overload protection in motor control centers (MCCs).

Technical Specifications

Category Specification
Manufacturer Schneider Electric
Brand Schneider Electric
Product Type Overload thermal unit heating element
Product Phase Phase-Out
Weight 0.04 kg
Commodity Code 85371099

Installation Guidelines

  • Correct Sizing: Ensure the B4.85 heating element is correctly selected based on the motor's full-load current (FLC) rating as specified by the motor manufacturer’s tables provided for the thermal overload relay.
  • Mounting: Insert the heating element into the thermal overload block, ensuring the mounting screws are tightened to the specified torque to prevent high-resistance contact points.
  • Inspection: Periodically inspect the heating element for signs of discoloration or terminal looseness caused by thermal cycling.
  • Safety: Always disconnect power to the motor starter before removing or installing thermal heating elements to prevent electrical shock.
  • Environment: Operate within a clean, dry control panel to ensure the thermal characteristics of the unit are not compromised by ambient dust or humidity.
Key Features:
#Thermal Overload Heating Elements

What is the function of the B4.85 heating element?
It serves as the sensing component in a thermal overload relay, translating motor current into heat to trip the protection mechanism during an overload condition.

How do I choose the correct heating element for my motor?
You must select the specific heating element (like the B4.85) by cross-referencing your motor's full-load current (FLC) with the manufacturer's selection table provided with the motor starter.

Is the B4.85 unit still in production?
No, this component is currently in the Phase-Out product phase.

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern
Gold
Country of origin
France

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