STMicroelectronics STPS160AFN

Overview

STPS160AFN from STMicroelectronics is a 60 V, 1 A surface-mount Schottky rectifier in SMA Flat Notch package, optimized for high-frequency DC/DC converters and low-voltage secondary rectification with VF(typ.) = 0.49 V at 125 °C and Tj(max.) = 150 °C. It features avalanche capability (180 W, tp = 10 µs), ECOPACK2 compliance, and is rated for parallel use with MOSFETs in synchronous rectification.

For engineers reviewing the STPS160AFN datasheet, STPS160AFN pinout, STPS160AFN application, or STPS160AFN equivalent, key selection criteria include forward voltage drop at elevated temperature, thermal resistance junction-to-lead (20 °C/W), surge current rating (100 A), avalanche energy handling, and footprint compatibility with compact power adapters and notebook secondary-side layouts.

Technical Context

This Schottky rectifier operates as a unidirectional, low-loss freewheeling and output rectification device in switching power supplies. Its metal–semiconductor junction enables negligible reverse recovery charge and near-zero switching losses, critical for >100 kHz operation in SMPS topologies like flyback and synchronous buck converters.

The device supports three package variants-SMA, SMA Flat Notch, and SMB-with STPS160AFN specifically using the SMA Flat Notch variant. Its thermal design relies on conduction cooling via PCB copper pads, with Rth(j-l) = 20 °C/W and Rth(j-a) strongly dependent on copper area (e.g., 80 °C/W on 1.5 cm² FR4).

Key Specifications

Pinout & Package

STPS160AFN uses the SMA Flat Notch surface-mount package (JEDEC DO-214AC variant), featuring a cathode band marking and optimized thermal pad layout for conduction cooling. Dimensions: D = 2.25–2.90 mm, E = 5.00–5.35 mm, E1 = 3.95–4.60 mm, L = 0.75–1.20 mm, weight = 0.039 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS16-E3/5AT and MBR160, STPS160AFN delivers lower thermal resistance, superior high-temperature VF performance, and guaranteed avalanche robustness-making it the preferred choice for compact, high-reliability 60 V secondary rectification where thermal headroom and transient immunity are critical.

Availability

STPS160AFN is available at Aetrix Electronics and suitable for lighting power supplies, battery charger outputs, and DC/DC converter secondaries requiring stable component supply, consistent thermal performance, and long-term industrial availability.

Supply support for STPS160AFN 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.

STPS160AFN belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, space-constrained switched-mode power supplies where low VF, avalanche ruggedness, and thermal predictability are essential.

FAQ

What is the maximum allowable PCB copper area for optimal thermal performance of STPS160AFN?

STPS160AFN achieves Rth(j-a) ≈ 40 °C/W with 2 cm² of 35 µm copper per lead on FR4, per Figure 11. For full 1 A continuous operation at 70 °C ambient, ≥1.5 cm² per pad is recommended. Exceeding 3 cm² yields diminishing returns due to FR4's low thermal conductivity.

Can STPS160AFN be used in parallel with another STPS160AFN for 2 A output current?

Yes-ST explicitly recommends parallel use for higher current. Matching VF across units ensures balanced current sharing; typical VF variation is ±5% at 1 A/125 °C. Use symmetrical PCB traces and shared thermal pad to maintain <2 °C junction delta between devices.

Does STPS160AFN require a heatsink in standard 1 A operation?

No external heatsink is required. With 1.5 cm² copper per lead on FR4, junction temperature rise is ~25 °C above ambient at 1 A/125 °C case temperature. The device's Rth(j-l) = 20 °C/W and low VF enable self-cooled operation in most adapter and DC/DC footprints.

Is STPS160AFN compatible with lead-free reflow profiles per JEDEC J-STD-020?

Yes-STPS160AFN is qualified for lead-free reflow with peak temperature up to 260 °C (10 s max), per its ECOPACK2 certification. The SMA Flat Notch package meets J-STD-020D moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly.