STMicroelectronics STPS20200CTN

Overview

STPS20200CTN from STMicroelectronics is a dual-center-tap 200 V Schottky rectifier in TO-220AB narrow-leads package, rated for 2 × 10 A average forward current per diode, 0.64 V typical forward voltage at 125 °C, and -40 to +175 °C operating junction temperature. It serves as secondary-side synchronous rectification in high-frequency switch-mode power supplies and DC–DC converters.

For engineers reviewing the STPS20200CTN datasheet, STPS20200CTN pinout, STPS20200CTN application, or STPS20200CTN equivalent, key selection criteria include low conduction loss (0.64 V VF typ), insulated package rating (2000 V DC isolation), thermal resistance (Rth(j-c) = 0.75 °C/W per diode), dual-diode center-tap topology, and ECOPACK®2 compliance for lead-free assembly.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode connection (center-tap configuration), enabling efficient full-wave rectification without external wiring. Its low VF and negligible switching losses stem from platinum-silicide Schottky barrier technology optimized for <1 MHz operation.

The TO-220AB narrow-leads package provides mechanical compatibility with standard TO-220 footprints while reducing lead spacing for tighter PCB layouts. Insulation performance (2000 V DC) and 45 pF inter-terminal capacitance are specified under DC bias, supporting safe operation in isolated secondary-side topologies.

Key Specifications

Pinout & Package

STPS20200CTN uses the TO-220AB narrow-leads package: insulated plastic body with three leads (anode1, cathode/common, anode2), metal tab electrically isolated from all terminals, and 2000 V DC insulation rating. Dimensions comply with Table 6 of ST's DocID024382 Rev 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH02-M3 and MBR20200CT, STPS20200CTN uniquely delivers certified 2000 V DC isolation in a narrow-leads TO-220AB variant, enabling direct replacement in safety-critical Class II adapters without layout or BOM changes.

Availability

STPS20200CTN is available at Aetrix Electronics and suitable for LED lighting drivers, server power supply output stages, industrial DC–DC converters, and Class II AC/DC adapters requiring stable component supply and long-term lifecycle support.

Supply support for STPS20200CTN 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 industrial, automotive, and consumer markets.

STPS20200CTN belongs to ST's Power Schottky Diode product line, engineered specifically for high-efficiency secondary-side rectification in isolated switch-mode power supplies where low VF, fast switching, and certified insulation are mandatory.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS20200CTN is rated for 2 × 10 A average forward current per diode at Tc = 160 °C. Exceeding this temperature requires derating per Figure 1 in ST's DocID024382 Rev 2. Thermal design must ensure case temperature remains ≤160 °C under worst-case load and ambient conditions to maintain full current capability.

Does the TO-220AB narrow-leads package require a thermal pad or solder paste under the tab?

No - the TO-220AB narrow-leads package features an electrically insulated tab. Thermal transfer occurs solely through conduction from the internal die to the external metal tab, which must be mounted to a heatsink using thermal interface material. Soldering the tab is unnecessary and may compromise insulation integrity.

Can STPS20200CTN replace STPS20200CT in existing designs?

Yes - STPS20200CTN is mechanically and electrically identical to STPS20200CT except for narrower lead spacing (0.95–1.20 mm vs. 2.40–2.70 mm). It maintains identical electrical specs, thermal resistance, and insulation rating. Layout adaptation is required only for lead pitch; no schematic or thermal redesign is needed.

What is the surge current rating and test condition?

The STPS20200CTN supports 180 A non-repetitive forward surge current (IFSM) for tp = 10 ms sinusoidal half-cycle at Tamb = 25 °C, per Table 2. This rating applies independently to each diode and assumes adequate heatsinking to prevent junction temperature exceeding 175 °C during the surge event.