STMicroelectronics STPS30L45CFP

Overview

STPS30L45CFP from STMicroelectronics is a dual-center-tap low-drop Schottky rectifier in insulated TO-220FPAB package, rated for 45 V reverse voltage, 15 A average forward current per diode (30 A total), and 150 °C maximum junction temperature. It delivers low forward voltage drop (0.42–0.50 V at 15 A/125 °C), low thermal resistance (4 °C/W junction-to-case per diode), and 2000 V DC insulation - optimized for high-frequency SMPS and DC-DC converters in industrial power supplies.

For engineers reviewing the STPS30L45CFP datasheet, STPS30L45CFP pinout, STPS30L45CFP application, or STPS30L45CFP equivalent, key selection criteria include avalanche-rated ruggedness (6000 W peak), 45 pF isolation capacitance, 10000 V/µs dV/dt rating, and thermal performance under forced convection or heatsink mounting in TO-220FPAB format.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification and bidirectional freewheeling in half-bridge topologies. Its low VF and low Rth(j-c) minimize conduction and thermal losses in high-duty-cycle, high-switching-frequency (>100 kHz) applications.

The TO-220FPAB package provides reinforced electrical insulation (2000 V DC) and defined thermal coupling (Rth(c) = 2.5 °C/W), making it suitable for isolated secondary-side rectification where creepage/clearance and safety compliance are critical - unlike standard TO-220AB variants.

Key Specifications

Pinout & Package

STPS30L45CFP uses the TO-220FPAB package: insulated plastic case with metal tab (heatsink) electrically isolated from leads, 2000 V DC dielectric strength, 45 pF inter-terminal capacitance, and recommended mounting torque of 0.4–0.6 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPH045 and MBR3045CT, STPS30L45CFP uniquely combines certified 2000 V DC insulation, 6000 W avalanche rating, and TO-220FPAB's standardized mounting - making it the only option qualified for reinforced-isolation, high-reliability industrial and medical secondary-side rectification without design compromises.

Availability

STPS30L45CFP is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, telecom rectifier modules, and medical AC-DC adapters requiring stable component supply and long-term manufacturability.

Supply support for STPS30L45CFP 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.

STPS30L45CFP belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in isolated switch-mode power supplies where low VF, thermal robustness, and safety insulation are mandatory.

FAQ

What is the maximum continuous junction temperature for STPS30L45CFP?

The absolute maximum operating junction temperature is 150 °C, as specified in Table 2 of the official datasheet (Doc ID 8002 Rev 4). Derating is required above Tc = 110 °C for TO-220FPAB mounting; sustained operation at 150 °C requires thermal design ensuring junction-to-case temperature rise stays within 4 °C/W × 15 A × VF limits.

Can STPS30L45CFP be used in place of a single-diode Schottky like STPS20L45D?

No - STPS30L45CFP is a dual-center-tap device with two anodes (A1, A2) and one common cathode (K), whereas STPS20L45D is a single-diode TO-220AB part. Pinout, internal structure, and circuit function differ fundamentally; substitution would require board-level redesign to accommodate the center-tap topology and shared cathode configuration.

Is the metal tab of STPS30L45CFP electrically isolated from the leads?

Yes - the TO-220FPAB package provides 2000 V DC electrical isolation between the metal tab (heatsink surface) and all three leads (A1, A2, K), verified per manufacturer test conditions. This allows direct mounting to grounded chassis or heatsinks without additional insulating hardware, unlike standard TO-220AB variants.

Does STPS30L45CFP have a specified junction capacitance value?

Yes - Figure 10 in the datasheet specifies typical junction capacitance as 45 pF at VR = 4 V and f = 1 MHz, measured at Tj = 25 °C. This low capacitance contributes to reduced switching losses and EMI in high-frequency converters, and is a defined parameter for layout parasitic modeling.