STMicroelectronics STPS12045TV

Overview

STPS12045TV from STMicroelectronics is a dual common-cathode power Schottky rectifier rated for 45 V repetitive peak reverse voltage, 120 A total average forward current (60 A per diode at Tc = 95 °C, δ = 0.5), and maximum junction temperature of 150 °C, with typical VF of 0.72 V at 120 A and 125 °C - used in high-frequency DC-DC converters and low-voltage SMPS output stages.

For engineers reviewing the STPS12045TV datasheet, STPS12045TV pinout, STPS12045TV application, or STPS12045TV equivalent, key selection criteria include its ISOTOP insulated package (2500 V_RMS isolation), dual-diode thermal coupling behavior (R_th(j−c) = 1 °C/W per diode, 0.55 °C/W total), and conduction loss equation P = 0.47 × I_F(AV) + 0.00333 × I_F(RMS)².

Technical Context

This dual Schottky rectifier integrates two independent anode terminals (A1, A2) and one shared cathode (K), enabling synchronous or interleaved low-loss freewheeling in phase-shifted or multiphase topologies. Its negligible reverse recovery charge (Q_rr ≈ 0) and dV/dt rating of 10,000 V/µs support operation in hard-switched 100–500 kHz converters without snubbers.

The ISOTOP package provides galvanic isolation between die and heatsink via molded epoxy (UL94 V0), with measured junction-to-case thermal resistance of 1 °C/W per diode and 0.55 °C/W total when both diodes conduct simultaneously - requiring derating per Fig. 2 based on case temperature and duty cycle.

Key Specifications

Pinout & Package

Package: ISOTOP (insulated TO-220 variant), 4-terminal metal package with isolated baseplate; dimensions per STMicroelectronics mechanical drawing: D = 38.0 mm, E = 25.3 mm, A = 12.0 mm, weight = 28.9 g (no screws); UL94 V0 epoxy, recommended torque = 1.3 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS12045TV, STPS1245CW sacrifices dual-anode routing for simpler single-path use, while VS-120CN045 trades 2500 V_RMS isolation for marginally better thermal resistance - making STPS12045TV optimal where safety isolation and layout compactness are prioritized over minimal R_th.

Availability

STPS12045TV is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, solar microinverters, and automotive on-board chargers requiring stable component supply and long-term production continuity.

Supply support for STPS12045TV 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency power conversion, with the STPS12045TV specifically engineered for insulated, dual-diode Schottky rectification in space-constrained, high-reliability 45 V systems.

FAQ

What is the maximum continuous forward current per diode at 100°C case temperature?

At T_c = 100 °C and duty cycle δ = 0.5, the maximum average forward current per diode is 52 A, derived from Fig. 2 (Average current versus case temperature). This reflects thermal derating due to reduced heat dissipation capacity at elevated temperatures, and must be applied even if ambient remains within specification.

Can STPS12045TV be used in avalanche mode?

No - STPS12045TV is a Schottky rectifier with no rated avalanche energy capability. Its 45 V V_RRM rating is absolute; exceeding this voltage risks immediate irreversible junction breakdown. Transient overvoltage protection must be implemented externally using TVS diodes or clamping circuits.

Is the ISOTOP package compatible with standard TO-220 heatsinks?

Yes, the ISOTOP footprint matches TO-220 mounting hole spacing (E1 = 24.0 mm), but its isolated baseplate requires no insulating kit. Standard TO-220 heatsinks may be used directly, though thermal performance differs due to ISOTOP's lower R_th(j−c) (0.55 °C/W total) versus typical TO-220 (1.5–2.0 °C/W).

How is surge current rating affected when both diodes conduct simultaneously?

When both diodes conduct, the non-repetitive surge current I_FSM remains 900 A per diode (not total), as specified in the Absolute Ratings table. However, simultaneous conduction increases total power dissipation, requiring verification against the transient thermal impedance curve (Fig. 4) to avoid junction overheating during pulse events.