STMicroelectronics STRVS225X02E

Overview

STRVS225X02E from STMicroelectronics is a unidirectional repetitive voltage suppressor (TVS) diode designed for clamping transient overvoltages in power semiconductor gate drive circuits. It delivers 225 V clamping voltage at 2 A peak pulse current, 154–189 V breakdown range (25–125 °C), 0.5 µA max leakage at 25 °C, and operates up to 175 °C junction temperature in DO-15 package - used specifically for IGBT protection in flyback auxiliary supplies.

For engineers reviewing the STRVS225X02E datasheet, STRVS225X02E pinout, STRVS225X02E application, or STRVS225X02E equivalent, key selection criteria include clamping voltage stability across temperature, low leakage under standby bias, thermal resistance (R_th(j-a) = 105 °C/W), and DO-15 package compatibility with high-reliability industrial power supply layouts.

Technical Context

The STRVS225X02E is a silicon avalanche diode operating in reverse-biased breakdown mode, with defined clamping behavior at IPP = 2 A and specified V_CL = 225 V at 125 °C. Its dynamic resistance (R_d = 5.5 Ω) and temperature coefficient (α_T = 10.8 × 10⁻⁴/°C) enable predictable voltage shift across −55 °C to +175 °C operating range.

It complies with IEC 61000-4-2 level 4 (±15 kV air / ±8 kV contact discharge), IEC 61000-4-5 level 4, and MIL-STD-883 HBM class 3B (25 kV), confirming suitability for repetitive surge environments where thermal accumulation must be managed via R_th(j-l) = 35 °C/W and R_th(j-a) = 105 °C/W on recommended PCB copper.

Key Specifications

Pinout & Package

STRVS225X02E uses the DO-15 axial-leaded package with cathode indicated by a band. Leads are solder-plated and compliant with MIL-STD-750 method 2026. Maximum lead temperature is 260 °C for 10 s at 5 mm from case.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode applications.

Compared with STRVS222X02F and STRVS241X02E, STRVS225X02E offers optimal balance of clamping precision (225 V), DO-15 form factor, and thermal capability for compact flyback gate drive designs - making it preferred where board real estate and thermal path constraints dominate.

Availability

STRVS225X02E is available at Aetrix Electronics and suitable for industrial motor drives, DIN-rail power supplies, and programmable logic controller (PLC) input modules requiring stable component supply under extended temperature and repetitive surge conditions.

Supply support for STRVS225X02E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STRVSX series was developed specifically for repetitive overvoltage protection in power semiconductor gate circuits - targeting reliability-critical applications where traditional single-pulse TVS devices fail under thermal cycling.

FAQ

What is the maximum peak pulse current rating for STRVS225X02E?

The STRVS225X02E is rated for 2 A peak pulse current (IPP) per IEC 61000-4-5 level 4 test conditions. This value is measured with 8/20 µs waveform and defines the current at which V_CL = 225 V is guaranteed at 125 °C junction temperature - not a one-time surge limit but a repeatable specification validated across thermal cycles.

Does STRVS225X02E support bidirectional transient suppression?

No - STRVS225X02E is a unidirectional TVS diode, marked with a cathode band and intended for DC-biased applications like gate protection. It conducts only in reverse breakdown; forward conduction follows standard silicon diode characteristics (VF ≈ 1.2 V at 1 A), and it does not provide symmetrical clamping for AC signals or bipolar transients.

How does the 10.8 × 10⁻⁴/°C temperature coefficient affect breakdown voltage?

The α_T = 10.8 × 10⁻⁴/°C coefficient means V_BR increases linearly with junction temperature: at 125 °C, V_BR rises ~10% above its 25 °C value (154 → 189 V). This positive drift ensures clamping remains active across temperature extremes without premature conduction or loss of protection margin.

Can STRVS225X02E replace standard P6KE220A TVS diodes?

No - although both are DO-15 TVS diodes, STRVS225X02E is optimized for repetitive surges (not single-event), with verified 10,000+ cycle endurance, lower leakage (0.5 µA vs. typical 1–5 µA), and tighter V_CL spec (225 V vs. 356 V for P6KE220A). Substitution requires validation of thermal accumulation and clamping timing in the target circuit.