STMicroelectronics STPS2545CTY

Overview

STPS2545CTY from STMicroelectronics is a dual-center-tab automotive-grade Schottky rectifier optimized for high-frequency DC-DC converters and switch-mode power supplies. It delivers 2 × 12.5 A average forward current per diode, 45 V repetitive peak reverse voltage, 0.57 V max forward voltage at 12.5 A/125 °C, 1.6 °C/W junction-to-case thermal resistance, and AEC-Q101 qualification - enabling use in engine control units and battery management systems.

For engineers reviewing the STPS2545CTY datasheet, STPS2545CTY pinout, STPS2545CTY application, or STPS2545CTY equivalent, key selection criteria include conduction loss modeling (P = 0.42×IF(AV) + 0.012×IF²(RMS)), avalanche energy handling (4800 W @ 1 µs), thermal coupling between dual diodes, and TO-220AB mechanical mounting constraints for automotive under-hood thermal environments.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common center-tab thermal path. Each diode exhibits negligible reverse recovery charge and sub-10 ns switching transitions, eliminating snubber requirements in 100–500 kHz automotive DC-DC stages.

Thermal design relies on validated junction-to-case (1.6 °C/W) and case coupling (0.6 °C/W) resistances; simultaneous conduction requires derating based on ΔTj = P₁×Rth(j-c) + P₂×Rth(c). Avalanche capability is specified with pulse duration and junction temperature derating curves per Figure 3 and Figure 4.

Key Specifications

Pinout & Package

Package: TO-220AB, 3-terminal dual-diode configuration with isolated anodes (A1, A2) and common cathode tab (K). Center tab serves as thermal and electrical connection point for cathode.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky rectifier applications.

Compared with STPS20L45CGY and VS-25CPH04-M3, STPS2545CTY uniquely combines AEC-Q101 qualification, center-tab thermal integration for dual-diode co-packaging, and 12.5 A per diode rating in TO-220AB - making it optimal for space-constrained automotive power modules requiring coordinated thermal behavior.

Availability

STPS2545CTY is available at Aetrix Electronics and suitable for engine control units, battery management systems, on-board chargers, and ADAS camera power supplies requiring stable component supply across automotive production lifecycles.

Supply support for STPS2545CTY 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

ST's automotive power portfolio targets high-reliability, high-efficiency power conversion in harsh environments - with STPS2545CTY developed specifically for AEC-Q101-compliant Schottky rectification in 12 V/24 V/48 V vehicle architectures.

FAQ

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

The STPS2545CTY has a maximum junction temperature of 175 °C. Derating is required above 125 °C ambient due to reduced thermal headroom; Figure 2 shows average forward current drops from 12.5 A at 25 °C ambient to ~7.5 A at 100 °C ambient with δ = 0.5 duty cycle and standard FR4 PCB copper area.

Can both diodes be used simultaneously without thermal interaction?

Yes, but thermal interaction must be modeled using ΔTj(diode 1) = P₁×Rth(j-c) + P₂×Rth(c), where Rth(c) = 0.6 °C/W couples heat from diode 2 into diode 1's junction. Simultaneous full-load operation requires heatsink design accounting for this coupling effect to avoid exceeding 175 °C Tj.

Is the center tab electrically isolated from the anodes?

No - the center tab is the common cathode (K) and is electrically connected to both diode cathodes. Anodes A1 and A2 are fully isolated from each other and from the tab. This configuration enables dual-anode, single-cathode topologies such as dual-output DC-DC converters or polarity protection circuits.

How is avalanche capability tested and what real-world events does it protect against?

Avalanche capability is tested per AEC-Q101 with unclamped inductive switching (UIS) pulses at 1 µs duration and 25 °C junction temperature, yielding 4800 W peak power. It protects against load-dump transients, relay coil de-energization spikes, and MOSFET shoot-through events in automotive power stages where voltage overshoot exceeds VRRM.