STMicroelectronics STPS30120CR

Overview

STPS30120CR from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB narrow leads package, rated for 120 V repetitive peak reverse voltage and 2 × 15 A average forward current per diode at Tc = 145 °C, with typical forward voltage drop of 0.70 V at 15 A and 125 °C - optimized for high-frequency SMPS in notebook and LCD adapters.

For engineers reviewing the STPS30120CR datasheet, STPS30120CR pinout, STPS30120CR application, or STPS30120CR equivalent, key selection criteria include avalanche power rating (480 W), junction-to-case thermal resistance (2.2 °C/W per diode), low leakage (≤7.5 mA at 125 °C), ECOPACK®2 compliance, and dual-diode center-tap configuration for synchronous rectification topologies.

Technical Context

This dual Schottky rectifier integrates two anti-parallel diodes sharing a common cathode terminal (center-tap configuration), enabling use in bridgeless PFC and synchronous rectifier stages. Its 120 V VRRM rating supports 100–120 VAC input-derived DC bus designs with margin against transient overvoltage.

Thermal design relies on conduction cooling via the TO-220AB narrow leads case; Rth(j-c) is 2.2 °C/W per diode, but coupling between diodes reduces total device Rth(j-c) to 1.3 °C/W when both are active - requiring derating per Table 2 and Figure 2 for ambient temperature vs. IF(AV) limits.

Key Specifications

Pinout & Package

Package: TO-220AB narrow leads - epoxy body meeting UL 94 V0, 0.55 N·m recommended mounting torque, 1.90 g weight, designed for vertical PCB mounting with heatsink contact via metal tab.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH12-M3 and MBR30H120CT, STPS30120CR delivers lower forward voltage, verified avalanche capability, and TO-220AB narrow leads for space-constrained layouts - making it optimal for high-density, thermally demanding 65–120 W AC-DC adapters.

Availability

STPS30120CR is available at Aetrix Electronics and suitable for notebook adapters, LCD monitor PSUs, and desktop SMPS requiring stable component supply, long-term lifecycle support, and consistent thermal performance across production batches.

Supply support for STPS30120CR 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, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STPS30120CR belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency AC-DC and DC-DC conversion in space- and thermally-constrained power supplies.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS30120CR supports continuous operation up to Tc = 145 °C per diode for its rated 15 A IF(AV), as defined in Table 1. Exceeding this requires linear derating per Figure 2; at Tc = 160 °C, IF(AV) drops to ~11.5 A per diode to maintain Tj ≤ 175 °C.

Is the STPS30120CR suitable for use in non-isolated buck-derived topologies?

Yes - its 120 V VRRM and low VF make it appropriate for high-side synchronous rectification in buck-derived isolated DC-DC modules (e.g., 48 V input → 12 V output), provided transformer turns ratio and clamping networks limit reverse voltage across each anode-cathode pair to ≤120 V.

How does the TO-220AB narrow leads variant differ electrically from the standard TO-220AB version?

Electrically identical - STPS30120CTN (narrow leads) shares all electrical specs (VRRM, IF(AV), VF, IR, PARM) with STPS30120CT. The only difference is mechanical: narrower lead spacing (L1 = 2.60–2.90 mm vs. 3.50–3.93 mm) for tighter PCB pitch, with identical thermal resistance and mounting torque requirements.

Does ST provide SPICE models or thermal simulation files for the STPS30120CR?

ST does not publish SPICE models for the STPS30120CR. However, thermal simulation guidance is provided in AN4021 and AN604, including conduction loss equations and junction-to-case impedance curves (Figure 4), enabling accurate thermal modeling in tools like FloTHERM or ANSYS Icepak using the published Rth(j-c) = 2.2 °C/W and Zth(j-c) pulse data.