Thermal Protection: Temperature Range 70°C to 180°C

Component Specifications

Definition

A thermal protection component integrated into drive motors to monitor operating temperature and automatically disconnect electrical power when predetermined temperature thresholds are reached, preventing motor damage from overheating caused by overload, locked rotor conditions, or insufficient cooling.

Working Principle

Operates using a bimetallic strip or thermistor that responds to temperature changes. When motor temperature exceeds the calibrated threshold, the thermal element physically opens the circuit or sends a signal to the control system to cut power. Resets automatically or manually once temperature drops below safe operating range.

Materials

Bimetallic elements (copper-steel/nickel-steel alloys), thermistor materials (PTC/NTC ceramics), insulating housing (thermoplastic/thermoset polymers), contact materials (silver alloy, gold-plated), encapsulation materials (epoxy resins)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Response Time	5-30 seconds
Trip Accuracy	±5°C
Current Rating	0.5A to 30A
Voltage Rating	250V AC/DC
Operating Cycles	>10,000 cycles
Reset Temperature	15-30°C below trip point
Temperature Range	70°C to 180°C
Dielectric Strength	1500V AC for 1 minute
Insulation Resistance	>100MΩ at 500VDC

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13849-1, IEC 60947-8, UL 2111, DIN EN 60204-1

Parent Products

This component is used in the following industrial products

Drive Motor

Electric motor that provides rotational power to drive the blending mechanism in pharmaceutical powder blending equipment

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Battery Pack

A rechargeable power source that provides electrical energy to portable Bluetooth noise-cancelling headphones.

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Engineering Analysis

Risks & Mitigation

Motor burnout from unprotected overheating
Production downtime from false trips
Electrical fire hazard if protection fails
Reduced motor lifespan from repeated thermal stress

FMEA Triads

Trigger: Contamination on bimetallic element
Failure: Delayed or failed trip response
Mitigation: Use sealed housing with IP54+ rating, regular inspection

Trigger: Mechanical fatigue of thermal element
Failure: Premature tripping at normal temperatures
Mitigation: Select components rated for expected cycle count, implement vibration damping

Trigger: Poor thermal contact with motor windings
Failure: Inaccurate temperature sensing
Mitigation: Ensure proper mounting with thermal compound, verify contact pressure

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Trip temperature tolerance ±5°C or better, current rating ±10% of nominal

Test Method

Thermal cycling test per IEC 60947-8, dielectric strength test at 1500V AC, endurance test with 10,000 operation cycles

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Thermal Protection

Manufacturer profiles associated with Thermal Protection.

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Related Components

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What causes thermal protection to trip in drive motors?

Common causes include motor overload, blocked ventilation, high ambient temperature, frequent start-stop cycles, voltage imbalance, or bearing failure increasing friction.

How do I select the right thermal protection for a drive motor?

Consider motor full-load current, insulation class temperature rating, ambient operating conditions, required response time, reset type (auto/manual), and compliance with relevant safety standards.

Can thermal protection be bypassed temporarily?

No, bypassing thermal protection creates fire and equipment damage risks. If frequent tripping occurs, diagnose and address the root cause of overheating.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Thermal Protection