STMicroelectronics STPS15L30CB-TR

Overview

STPS15L30CB-TR from STMicroelectronics is a dual-center-tab Schottky rectifier in DPAK package, rated for 30 V repetitive peak reverse voltage and 15 A total average forward current (7.5 A per diode), with typical forward voltage drop of 0.34 V at 7.5 A and 125 °C, designed for low-voltage, high-frequency DC-DC converters and free-wheeling circuits.

For engineers reviewing the STPS15L30CB-TR datasheet, STPS15L30CB-TR pinout, STPS15L30CB-TR application, or STPS15L30CB-TR equivalent, key selection criteria include its dual-diode configuration, low thermal resistance (4 °C/W per diode junction-to-case), avalanche-rated power (200 W), and ECOPACK®2-compliant DPAK packaging for industrial power conversion designs.

Technical Context

This dual Schottky rectifier integrates two independent diodes sharing a common cathode connection via the center tab, enabling synchronous rectification or complementary freewheeling paths. Its low VF (0.34–0.51 V across operating conditions) and negligible switching losses stem from majority-carrier conduction and absence of minority-carrier storage delay.

The device features avalanche-rated capability (200 W, 10 µs pulse at 125 °C), low junction-to-case thermal resistance (4 °C/W per diode), and low capacitance - critical for minimizing EMI and improving efficiency in 100–500 kHz SMPS topologies where reverse recovery is absent and conduction loss dominates.

Key Specifications

Pinout & Package

DPAK (TO-252) package with three terminals: two anodes (A1, A2) and one common cathode (K) connected to the large center thermal tab. The tab is electrically tied to cathode and must be soldered to a thermal pad for optimal heat dissipation and electrical return path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS15L30DJF-TR, the STPS15L30CB-TR trades 1.5 °C/W higher thermal resistance for lower profile and tape-and-reel compatibility; versus VS-15CTQ030PBF, it offers guaranteed avalanche performance and surface-mount scalability at slightly higher VF at room temperature.

Availability

STPS15L30CB-TR is available at Aetrix Electronics and suitable for server VRM output rectification, industrial 24 V DC-DC converters, and solar microinverter DC link applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for STPS15L30CB-TR 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 STPS series targets high-efficiency power conversion with Schottky rectifiers optimized for low-VF, high-frequency operation in compact surface-mount packages - specifically addressing thermal and EMI challenges in modern DC-DC and SMPS designs.

FAQ

What is the maximum junction temperature and how is it enforced?

The absolute maximum junction temperature is 150 °C, validated under conditions that avoid thermal runaway (dPtot/dTj < 1/Rth(j-a)). Operation above this limit risks permanent degradation of Schottky barrier integrity and increased leakage. Thermal design must ensure junction temperature remains ≤150 °C under worst-case ambient and load conditions using the provided Rth(j-c) = 4 °C/W per diode and recommended PCB copper area.

Is the center tab electrically isolated from the cathode?

No - the center tab is the common cathode terminal (K) and is electrically connected to both diode cathodes. It must be routed to the system ground or output return plane. Any attempt to isolate the tab electrically will break the circuit path and render the device inoperable. Thermal vias beneath the tab must connect to the same net as the cathode trace.

Can STPS15L30CB-TR replace a single 15 A Schottky in a freewheeling application?

Yes, but only if the circuit uses a common-cathode configuration. Since both diodes share one cathode (K), it functions as a dual-anode, single-cathode device - ideal for two-input/single-output freewheeling (e.g., OR-ing or dual-rail redundancy). It cannot substitute a single-anode/single-cathode 15 A diode without modifying the PCB layout to accommodate the dual-anode topology.

Does the avalanche rating apply to both diodes simultaneously?

Yes - the 200 W avalanche rating (at 125 °C, 10 µs pulse) applies per diode, meaning each diode can independently sustain that energy level. However, simultaneous avalanche conduction in both diodes would double total power dissipation, requiring verification that combined thermal stress remains within safe operating area limits defined by Rth(j-c) and PCB thermal design.