STMicroelectronics STPS2150A

Overview

STPS2150A from STMicroelectronics is a 150 V, 2 A surface-mount Schottky power rectifier in SMA package, optimized for high-frequency switch-mode power supplies and DC/DC converters on ≤24 V rails. It delivers low forward voltage drop (0.62 V typ. at 125 °C, 2 A), negligible switching losses, and avalanche capability with 170 W peak repetitive avalanche power at 10 µs pulse width.

For engineers reviewing the STPS2150A datasheet, STPS2150A pinout, STPS2150A application, or STPS2150A equivalent, key selection criteria include thermal resistance (20 °C/W junction-to-lead), reverse leakage (1.5 µA at 25 °C), and ECOPACK2 compliance for environmental design requirements.

Technical Context

This Schottky rectifier operates as a unidirectional power switching diode with no minority-carrier storage delay, enabling zero-recovery-time operation in high-frequency (>100 kHz) topologies. Its low VF minimizes conduction loss-calculated via P = 0.59 × IF(AV) + 0.04 × IF²(RMS)-and supports extended battery life in portable DC/DC stages.

The device features specified avalanche capability (170 W at Tj = 125 °C, tp = 10 µs), validated thermal resistance (Rth(j-L) = 20 °C/W for SMA), and stable performance across -65 to +175 °C junction temperature range, making it suitable for thermally constrained consumer and computing power designs.

Key Specifications

Pinout & Package

STPS2150A uses the SMA (DO-214AC) surface-mount package: 2-pin, cathode-banded, epoxy-molded, UL94 V0 compliant. Dimensions: D = 2.25–2.90 mm, E = 4.80–5.35 mm, L = 0.75–1.50 mm. Recommended footprint per DS3282 Rev 8 Figure 14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS215H and MBR2150CT, STPS2150A provides superior thermal performance (20 °C/W), lowest VF (0.62 V), and surface-mount compatibility-enabling higher power density and efficiency in space-constrained, high-frequency DC/DC converters.

Availability

STPS2150A is available at Aetrix Electronics and suitable for server power supplies, laptop adapters, industrial PLCs, and USB-C PD fast chargers requiring stable component supply and RoHS-compliant sourcing.

Supply support for STPS2150A 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS2150A belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, low-loss power conversion in space- and thermal-constrained applications such as portable electronics and energy-efficient AC/DC adapters.

FAQ

What is the maximum allowable surge current for STPS2150A?

The STPS2150A supports a non-repetitive forward surge current (IFSM) of 75 A for 10 ms sinusoidal pulses in the SMA package. This rating applies under TL = 145 °C and is validated per IEC 61000-4-5 surge immunity standards for transient overload handling in power supply inputs.

Does STPS2150A require a heatsink in typical 2 A operation?

No heatsink is required for STPS2150A at 2 A average current if mounted on ≥1 cm² of 35 µm copper per lead on FR4 PCB. With Rth(j-L) = 20 °C/W and typical ambient of 50 °C, junction temperature remains below 125 °C-well within the 175 °C absolute maximum-using only PCB conduction cooling.

How does the ECOPACK2 compliance affect STPS2150A's manufacturing process?

ECOPACK2 compliance certifies that STPS2150A meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements, with lead-free terminations, halogen-free epoxy, and fully traceable material declarations. No process changes are needed for assembly-standard Pb-free reflow profiles apply without solderability degradation.

Can STPS2150A replace STPS2150 in existing designs?

Yes-STPS2150A is a direct replacement for STPS2150 in SMA package configurations. Both share identical electrical specs, thermal characteristics, and mechanical outline. The "A" suffix denotes enhanced manufacturing control and updated ECOPACK2 compliance; no layout or firmware changes are required for drop-in substitution.