STMicroelectronics STPS30170CT

Overview

STPS30170CT from STMicroelectronics is a dual center-tap high-voltage Schottky rectifier optimized for high-frequency switch-mode power supplies. It delivers 2 × 15 A average forward current per diode, 170 V repetitive peak reverse voltage, and a typical forward voltage drop of 0.69 V at 125 °C/15 A - enabling high-efficiency secondary-side rectification in telecom and industrial AC-DC adapters.

For engineers reviewing the STPS30170CT datasheet, STPS30170CT pinout, STPS30170CT application, or STPS30170CT equivalent, key selection criteria include junction-to-case thermal resistance (0.95 °C/W total for D²PAK), avalanche-rated pulse power (750 W), low leakage (<20 µA at 25 °C), and ECOPACK®2-compliant packaging for regulated environments.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous or interleaved flyback/flybuck topologies. Its low VF–IR trade-off targets efficiency-critical 100–500 kHz SMPS designs where conduction loss dominates over switching loss.

The device supports parallel operation via thermally coupled mounting (Rth(c) = 0.3 °C/W coupling between diodes in D²PAK), and its specified avalanche capability (PARM = 750 W, tp = 10 µs) allows safe handling of inductive turn-off transients without external snubbers in compact power stages.

Key Specifications

Pinout & Package

Available in D²PAK (TO-263) and TO-247 packages. This part uses the D²PAK variant (order code STPS30170CG-TR), with exposed metal tab serving as common cathode (K) and two isolated anode terminals (A1, A2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage dual Schottky rectifier applications.

Compared with VS-30CPH07-M3 and MBR30H150CT, STPS30170CT provides superior voltage margin (170 V), lowest VF at high temperature, and D²PAK tape-and-reel availability - making it optimal for new 230 VAC-input, high-density SMPS requiring long-term thermal stability.

Availability

STPS30170CT is available at Aetrix Electronics and suitable for server power supplies, industrial AC-DC adapters, telecom brick converters, and EV charging auxiliary supplies requiring stable component supply across multi-year production cycles.

Supply support for STPS30170CT 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.

The STPS high-voltage Schottky rectifier product line targets high-efficiency, high-reliability power conversion in demanding environments - emphasizing thermal robustness, avalanche tolerance, and regulatory compliance for mission-critical infrastructure.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS30170CT has a maximum junction temperature of 175 °C and a total junction-to-case thermal resistance of 0.95 °C/W in D²PAK. With 31.6 W total dissipation (calculated from P = 0.64 × IF(AV) + 0.0073 × IF²(RMS)), the case must remain ≤143.4 °C to avoid exceeding Tj(max). Derating is required above 100 °C ambient.

Can STPS30170CT be used in parallel with another identical device?

Yes - but only with matched thermal mounting (identical heatsink contact, torque, and thermal interface). The device's Rth(c) = 0.3 °C/W coupling means unequal die temperatures will cause current imbalance. Use external ballast resistors or current-sharing transformers if paralleling is unavoidable.

Is the center-tap connection internally bonded or externally accessible?

The center-tap is the common cathode (K) terminal, fully exposed on the D²PAK metal tab and electrically isolated from the PCB pad except through solder. No internal bonding to substrate - K is a dedicated, low-inductance output node designed for direct connection to bulk capacitors and ground planes.

Does STPS30170CT require a minimum reverse voltage to maintain low leakage?

No - leakage current is specified at VR = VRRM (170 V) and increases only slightly with applied reverse voltage. At 25 °C, IR remains <20 µA up to rated VRRM; no minimum bias is needed. However, leakage rises exponentially with temperature - at 125 °C, IR reaches up to 20 mA, which must be accounted for in standby power budgets.