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Temperature Rise Testing Services

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Temperature Rise Testing Services

Compatible Electronics performs temperature rise testing under normal and abnormal/fault operating conditions as part of NVLAP-accredited safety evaluations at our laboratory (Lab Code 200527-0). Temperature limits protect users from burns, prevent component degradation, and ensure insulation integrity under sustained operation.

NVLAP Lab Code 200527-0 ISO/IEC 17025:2017 Normal & Fault Conditions IEC 62368-1 · IEC 60335-1 · IEC 60601-1 Lake Forest · Brea · Newbury Park

What is Temperature Rise Testing?

Temperature rise testing measures the steady-state temperature of critical components, surfaces, enclosures, windings, and insulation materials while the product operates at rated load — and in some cases under specified abnormal or fault conditions. The measured temperatures are compared against the maximum allowable limits defined in the applicable safety standard, which are set to protect users from burns, prevent insulation degradation, and ensure fire safety.

Testing is performed under worst-case ambient conditions (typically 25°C ±2°C) with the product operating at rated voltage and maximum rated load until thermal equilibrium is reached. Thermocouples, thermistors, and resistance methods are used per the applicable standard. Temperature rise testing is a key clause in IEC 62368-1, IEC 60335-1, IEC 60601-1, IEC 61010-1, and IEC 60204-1.

💡 Abnormal operation tests: Beyond normal operation, IEC standards require temperature measurements under specified fault conditions — locked rotor, blocked ventilation, overload, component failure. These tests verify the product remains safe even when something goes wrong.

What We Measure

  • Transformer windings — winding temperature by resistance method
  • Motor windings — winding rise under rated and locked-rotor conditions
  • User-accessible surfaces — handle, knob, grip, enclosure temperatures
  • Internal components — semiconductors, capacitors, inductors
  • PCB and insulation materials — relative thermal index (RTI) verification
  • Contacts and terminals — connector and terminal block temperature rise
  • Battery and charging circuits — thermal runaway precursor monitoring
  • Heating elements — surface temperature of intentional heaters
  • Abnormal operation — blocked vents, locked rotor, overload, component failure
  • Patient contact surfaces — IEC 60601-1 applied part temperature limits

Standards Requiring Temperature Rise Testing

  • IEC 62368-1 — Clause 9 / TS1/TS2/TS3 thermal energy source classification
  • IEC 60335-1 — Clause 11: Heating; Clause 19: Abnormal operation
  • IEC 60601-1 — Clause 11.1: Temperature limits for applied parts and surfaces
  • IEC 61010-1 — Clause 10: Temperature limits
  • IEC 60204-1 — Clause 4.4: Thermal considerations for machinery
  • IEC 60730-1 — Clause 14: Temperature rise of automatic controls
  • EN 957 — Motor and electronics temperature for fitness equipment
  • IEC 61851 — Cable and connector temperature for EV charging

Related Safety Tests

Dielectric Strength / Hi-Pot Testing Leakage Current Testing Ground Continuity Testing Battery Safety Testing IP Ingress Protection Testing IEC 60335-1 Appliance Safety IEC 60601-1 Medical Safety All Safety Testing Services

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