Infineon Technologies SPD02N50C3BTMA1

Overview

SPD02N50C3BTMA1 from Infineon Technologies is a 500 V, 2.3 A N-channel enhancement-mode power MOSFET in TO-220AB package, featuring 3.8 Ω R_DS(on) at V_GS = 10 V and T_j = 25 °C, ultra-low gate charge (Q_g = 9.5 nC), and avalanche-rated operation up to 150 mJ single-pulse. It serves as a high-voltage low-side switch in offline SMPS flyback converters.

For engineers reviewing the SPD02N50C3BTMA1 datasheet, SPD02N50C3BTMA1 pinout, SPD02N50C3BTMA1 application, or SPD02N50C3BTMA1 equivalent, key selection criteria include its 500 V V_DSS, 3.8 Ω R_DS(on), 9.5 nC total gate charge, 150 mJ E_AS, and TO-220AB thermal performance with R_thJC = 2.5 K/W.

Technical Context

This MOSFET employs Infineon's CoolMOS™ C3 technology, delivering improved transconductance (g_fs = 3.5 S) and reduced effective output capacitance (C_oss,er = 45 pF, C_oss,tr = 25 pF) for faster switching and lower switching losses in hard-switched topologies.

It supports repetitive avalanche operation (I_AR = 2.3 A, E_AR = 15 mJ) under defined conditions (dV/dt ≤ 15 V/ns, di/dt ≤ 400 A/µs, V_DClink = 400 V), and integrates a fast-recovery body diode with t_rr = 110 ns and Q_rr = 0.32 µC at I_F = 2.3 A.

Key Specifications

Pinout & Package

SPD02N50C3BTMA1 uses the TO-220AB package: insulated case, through-hole mounting, 3-pin configuration with tab connected to drain. Thermal pad is electrically isolated and thermally coupled to PCB copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage low-side switching applications.

Compared with STP2NK50ZFP and IPP60R099C6, SPD02N50C3BTMA1 uniquely balances 500 V rating, 3.8 Ω R_DS(on), 9.5 nC gate charge, and certified 150 mJ avalanche energy-making it optimal for compact, cost-sensitive, and robust 10–25 W offline converters.

Availability

SPD02N50C3BTMA1 is available at Aetrix Electronics and suitable for AC-DC flyback converters, offline LED drivers, and industrial auxiliary power supplies requiring stable component supply and long-term lifecycle support.

Supply support for SPD02N50C3BTMA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs and discrete devices.

SPD02N50C3BTMA1 belongs to the CoolMOS™ C3 family, designed specifically for high-efficiency, high-reliability offline SMPS where low gate charge, low R_DS(on), and avalanche ruggedness are critical.

FAQ

Is SPD02N50C3BTMA1 suitable for zero-voltage switching (ZVS) topologies?

No. SPD02N50C3BTMA1 is optimized for hard-switched flyback and forward converters. Its C_oss profile and lack of ZVS-specific characterization (e.g., C_oss linearity, Q_g vs. V_GS curve) make it unsuitable for resonant LLC or phase-shifted full-bridge designs requiring precise soft-switching behavior.

What is the maximum recommended gate resistor value for 65 kHz operation?

For 65 kHz flyback operation with V_GS = 12 V drive, a 10 Ω gate resistor is recommended. This limits peak gate current to ~1.2 A while maintaining t_r/t_f < 25 ns, avoiding excessive switching loss or gate oscillation given the device's 9.5 nC Q_g and 1.5 kΩ R_GS.

Does SPD02N50C3BTMA1 require a gate driver IC or can it be driven directly from a microcontroller?

A dedicated gate driver IC is required. The 9.5 nC Q_g demands >100 mA peak current for sub-100 ns transitions; most microcontrollers deliver only 20–40 mA and cannot sustain the required dV/dt, risking slow turn-on, shoot-through, or thermal overstress.

Can SPD02N50C3BTMA1 replace SPD02N50C3 in existing designs?

Yes. SPD02N50C3BTMA1 is the tape-and-reel variant of SPD02N50C3 with identical electrical specifications, thermal characteristics, and pinout. The "TMA1" suffix denotes packaging format only; no design changes or requalification are needed for drop-in substitution.