STMicroelectronics STPS41L60CT

Overview

STPS41L60CT from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB package, rated for 60 V repetitive peak reverse voltage, 40 A total average forward current (2 × 20 A per diode), and maximum junction temperature of 150 °C. It delivers low forward voltage drop (0.58 V max at 20 A, 125 °C) with negligible switching losses, making it suitable for high-frequency DC–DC converters and low-voltage SMPS free-wheeling paths.

For engineers reviewing the STPS41L60CT datasheet, STPS41L60CT pinout, STPS41L60CT application, or STPS41L60CT equivalent, this device is selected for high-efficiency, thermally constrained rectification where low conduction loss and avalanche ruggedness are critical - especially in industrial power supplies and automotive auxiliary converters.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode pairs sharing a common cathode terminal (center-tap configuration), enabling synchronous half-wave rectification or dual-output DC–DC topologies. Its low thermal resistance (R_th(j–c) = 0.8 °C/W total) supports high-power density mounting on heatsinks without forced airflow.

The device features specified avalanche capability (V_ARM = 80 V, P_ARM = 9500 W at t_p = 1 µs), validated per AN1768/AN2025, and operates reliably up to 150 °C junction temperature under δ = 0.5 duty cycle conditions - critical for transient overvoltage robustness in unregulated converter stages.

Key Specifications

Pinout & Package

Package: TO-220AB - Insulated plastic case with metal tab for direct heatsink mounting; 3-pin through-hole format; ECOPACK® compliant; recommended torque: 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-center-tap Schottky rectifier applications.

Compared with STPS41L60CT, STPS40L60CW trades thermal performance for SMT compatibility, while VS-42CTH06-M3 sacrifices avalanche robustness for lower unit cost - making STPS41L60CT the optimal choice for thermally demanding, transient-heavy industrial and automotive rectification.

Availability

STPS41L60CT is available at Aetrix Electronics and suitable for industrial DC–DC converters, automotive auxiliary power supplies, and telecom rectifier modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STPS41L60CT 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STPS41L60CT belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability rectification in switch-mode power supplies where low V_F, thermal resilience, and transient robustness are mandatory.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The STPS41L60CT has a maximum junction temperature (T_j) of 150 °C. This rating allows operation in high-ambient environments like engine bays or sealed industrial enclosures. Thermal design must ensure that power dissipation - calculated using P = 0.42 × I_F(AV) + 0.007 × I_F(RMS)² - stays within limits defined by R_th(j–c) = 0.8 °C/W and heatsink interface resistance. Derating is required above T_C = 125 °C.

Is the STPS41L60CT suitable for synchronous rectification topologies?

No - the STPS41L60CT is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET driver. It replaces active switches in non-controlled freewheeling paths. While it can be used in quasi-synchronous configurations (e.g., center-tapped forward converters), it does not support gate drive or timing control; its role is purely unidirectional conduction with inherent zero-voltage turn-on.

Does the device require a heatsink, and what mounting torque is recommended?

Yes - due to its 40 A total current capability and power dissipation, the STPS41L60CT must be mounted on a heatsink via its insulated metal tab. The recommended mechanical mounting torque is 0.4–0.6 N·m. Exceeding this may crack the package or compromise insulation; insufficient torque increases thermal resistance and risks thermal runaway under full load.

How does the avalanche rating translate to real-world reliability?

The STPS41L60CT's V_ARM = 80 V and P_ARM = 9500 W (t_p < 1 µs) are validated per ST application notes AN1768 and AN2025. This means the device can absorb single-pulse inductive energy (e.g., from transformer leakage inductance or relay coil de-energization) without degradation - eliminating need for external TVS diodes in many 24–48 V systems.