STMicroelectronics STPS2H100RL

Overview

STPS2H100RL from STMicroelectronics is a 100 V, 2 A axial-lead Schottky rectifier in DO-41 package, optimized for high-frequency DC/DC converters and low-voltage switch-mode power supplies. It delivers VF(max) = 0.70 V at 2 A and 125 °C, supports Tj(max) = 175 °C operation, and features avalanche-rated capability (PARM = 108 W, tp = 10 µs) for robust transient handling in battery charger inverters.

For engineers reviewing the STPS2H100RL datasheet, STPS2H100RL pinout, STPS2H100RL application, or STPS2H100RL equivalent, key selection criteria include forward voltage drop at elevated temperature, reverse leakage at 125 °C, thermal resistance (Rth(j-a) = 100 °C/W), avalanche energy rating, and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

This Schottky rectifier uses a planar silicon structure with metal-semiconductor junction to achieve negligible switching losses and fast recovery (trr not specified but inherent to Schottky architecture). Its low VF–IR trade-off enables high efficiency in 12–48 V output DC/DC stages where conduction loss dominates.

The device is rated for repetitive peak reverse voltage (VRRM) of 100 V and average forward current (IF(AV)) of 2 A at TL = 120 °C with 50% duty cycle. Avalanche capability is fully characterized per IEC 61000-4-5 surge standards, supporting unclamped inductive switching in compact chargers.

Key Specifications

Pinout & Package

DO-41 axial-leaded package with cathode indicated by a colored band. Leads are tinned copper-clad steel; epoxy body meets UL94 V0 flammability rating. Mechanical dimensions: A = 4.07–5.20 mm (body length), ØD = 0.71–0.86 mm (lead diameter).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR2100FS and SS210HE3/5A, STPS2H100RL uniquely combines axial DO-41 form factor, 108 W avalanche rating, and 175 °C junction rating-making it the only option qualified for thermally aggressive, through-hole–based battery charger designs requiring unclamped inductive switching robustness.

Availability

STPS2H100RL is available at Aetrix Electronics and suitable for LED lighting drivers, USB-C battery chargers, and industrial DC power supplies requiring stable component supply across multi-year production cycles.

Supply support for STPS2H100RL 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STPS series targets high-efficiency power conversion with Schottky rectifiers optimized for low VF, high Tj, and rugged avalanche performance in cost-sensitive, space-constrained applications.

FAQ

What is the maximum allowable lead length for full 2 A current rating?

The datasheet specifies Rth(j-a) = 100 °C/W at lead length = 10 mm. Extending leads beyond 10 mm increases thermal resistance linearly (per Figure 9), reducing safe operating current. For 2 A continuous operation, maintain exactly 10 mm lead length between PCB surface and heat-sink interface point.

Does STPS2H100RL support synchronous rectification replacement?

No-it is a passive Schottky diode, not a synchronous rectifier IC. It replaces conventional PN diodes in asynchronous topologies. For synchronous rectification, ST offers dedicated controllers like SRK1001, but STPS2H100RL serves as the freewheeling element in those designs.

Is the cathode band polarity consistent across all ST DO-41 Schottky parts?

Yes. Per ST's DO-41 mechanical drawing (Figure 10) and ordering information table, the colored band always denotes the cathode terminal across ST's STPS, STTH, and STPSxH product families, ensuring consistent PCB layout reuse.

How does the 175 °C Tj(max) affect PCB material selection?

The 175 °C rating permits FR-4 usage up to 125 °C ambient with proper copper pour; no high-Tg laminate required. However, sustained operation above 150 °C junction temperature demands ≥2 oz copper on both sides and thermal vias under the cathode/anode pads to maintain Rth(j-a) ≤ 100 °C/W.