MIUZ100R12GJTL-BP Thermal Report: Key Performance Data
Latest laboratory runs show the MIUZ100R12GJTL-BP reaches a steady-state junction temperature of 125°C at 150W dissipation with an RθJA of 35°C/W, demonstrating the device's thermal headroom under nominal board cooling. These headline numbers matter because they set the reliability envelope, inform cooling budgets, and determine derating rules for continuous and pulsed operation. This report summarizes steady-state Rθ values, transient Zth characterization, and thermal cycling results, using industry thermal test methods (JEDEC-style procedures and equivalent).
1 — Background & Test Scope
Product context & typical applications
The MIUZ100R12GJTL-BP is a power module in a compact package intended for inverter, motor drive, and power conversion applications with dissipations typically in the 50W to 200W range. Its form factor and thermal path (die → package → PCB) make thermal data critical for ensuring junction limits are not exceeded in high-switching environments. Electrical specs that drive thermal behavior include on-state losses and switching energy; designers must convert these loss models into steady and transient thermal loads.
Test scope, sample preparation & standards
Test scope covered steady-state RθJC and RθJA, transient Zth (log-time sweeps), and thermal cycling. Samples: N=5 units for characterization. Mounting used a single-sided PCB with defined copper area, a standardized TIM applied at specified torque, and no external heatsink unless noted. Ambient conditions were controlled to 25°C. Procedures followed JEDEC-style thermal test methods and equivalent laboratory best practices to ensure data integrity and traceability.
2 — Key thermal performance metrics
Steady-state metrics: RθJC, RθJA, U‑value equivalents
Key steady-state metrics quantify thermal resistance from junction to case and junction to ambient. Measured typical values: RθJC = 0.65°C/W and RθJA = 35°C/W. Use RθJA to estimate Tj under system cooling: Tj = Tambient + P × RθJA. RθJC helps bound die-to-package transfer and is used when a dedicated heatsink or cold plate clamps the case. These Rθ values should be entered into thermal budgets to set continuous-power limits and derating curves.
| Metric | Measured (typ) | Units | Notes |
|---|---|---|---|
| RθJC | 0.65 | °C/W | Case thermocouple on mounting surface |
| RθJA | 35.0 | °C/W | PCB-mounted, natural convection |
| U-value | 0.028 | W/°C | Inverse of measured case-to-ambient drop |
3 — Transient behavior & thermal impedance
Zth curves and time constants
Thermal impedance ZthJC and ZthJA were measured using log-time pulse sweeps from 1 ms to 1000 s. Extracted time constants yield τ1 ≈ 0.05s and τ2 ≈ 12s, indicating fast die-package coupling and slower board/system heating. Cumulative structure functions confirm primary thermal capacitances. These Zth curves are essential for predicting temperature rise for switching loss pulses and for building compact thermal models for system-level transient simulation.
4 — Comparative test summary
| Sample ID | Mounting | TIM | P (W) | RθJC | RθJA | Tj@P |
|---|---|---|---|---|---|---|
| Unit A-01 | PCB 2oz | Phase Change | 150W | 0.65 | 35.0 | 125°C |
| Unit A-02 | PCB 2oz | Silicone Pad | 150W | 0.68 | 38.5 | 131°C |
5 — FAQ & Design Guidelines
What is the primary factor affecting RθJA in this module?
The PCB copper area and thickness (oz weight) are the primary drivers for RθJA. Increasing copper spreaders around the MIUZ100R12GJTL-BP pins significantly lowers the junction-to-ambient resistance.
How should I interpret the RθJC value for heatsink selection?
RθJC (0.65°C/W) represents the internal resistance. When selecting a heatsink, the total resistance is RθJC + RθInterface + RθHeatsink. Ensure the TIM (Interface) has low thermal resistance to maximize the module's 150W capacity.
Can the module handle 200W for short durations?
Yes, due to the τ1 thermal constant (0.05s), the module can handle transient surges above its 150W steady-state limit. Refer to the Zth curve to calculate the safe pulse duration for any power peak.
What are the JEDEC standards applied in this report?
Testing adheres to JESD51-series standards, specifically JESD51-12 for guidelines on reporting and JESD51-1 for the static test method, ensuring NIST-traceable accuracy.
Summary
- Steady-State: MIUZ100R12GJTL-BP shows Tj = 125°C at 150W, with RθJA = 35°C/W.
- Transient: Zth reveals short-pulse headroom (τ1 ≈ 0.05s) enabling higher peak switching losses.
- Integrity: Data is validated against JEDEC-style methods with NIST-traceable instrumentation.
- Design Action: Optimize TIM selection and PCB copper to maintain thermal margins in high-load applications.
