STMicroelectronics STPSC12065D

Overview

STPSC12065D from STMicroelectronics is a 650 V, 12 A silicon carbide Schottky power diode in TO-220AC package, designed for high-efficiency PFC stages and high-frequency switching applications. It delivers zero reverse recovery, 1.30 V typical forward voltage at 12 A, and operates up to 175 °C junction temperature. Its negligible temperature-dependent switching behavior enables stable performance in onboard chargers and industrial DC/DC converters.

For engineers reviewing the STPSC12065D datasheet, STPSC12065D pinout, STPSC12065D application, or STPSC12065D equivalent, key selection criteria include reverse leakage at 150 °C (≤1000 µA), junction-to-case thermal resistance (1.25 °C/W max), capacitive charge (36 nC at 400 V), creepage compliance per IEC 60664-1, and surge capability (50 A @ 10 ms, Tc = 25 °C).

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in critical high-voltage, high-frequency power conversion stages. Its wide bandgap substrate enables a 650 V blocking rating with no minority-carrier storage, eliminating reverse recovery losses and associated EMI.

The device exhibits thermally stable dynamic characteristics: total capacitance drops from 750 pF at 0 V to 60 pF at 400 V, and capacitive charge integrates to 36 nC - both independent of temperature. Its D²PAK HV variant achieves 5.38 mm minimum anode-to-cathode creepage, but STPSC12065D uses TO-220AC with standard creepage.

Key Specifications

Pinout & Package

STPSC12065D is housed in TO-220AC package: single-ended, through-hole, insulated tab, with center-tab anode configuration. The case serves as the anode terminal; cathode is accessed via lead #1 (left pin when facing front marking side). Mounting torque: 0.55 N·m recommended (max 0.70 N·m).

Key Features

Applications

Equivalent & Alternatives

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

Compared with C3D12065A and SS12065A, STPSC12065D offers lowest unit cost and simplest through-hole assembly, while trading 0.3 °C/W higher thermal resistance and no built-in creepage enhancement - ideal for cost-sensitive, medium-volume TO-220-based PFC modules.

Availability

STPSC12065D is available at Aetrix Electronics and suitable for onboard EV chargers, industrial PFC modules, server PSU snubbers, and renewable energy DC/DC isolators requiring stable component supply across multi-year production cycles.

Supply support for STPSC12065D 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.

STPSC12065D belongs to the STPOWER SiC Diode product line, engineered specifically for high-efficiency, high-reliability power conversion in PFC, solar inverters, and EV infrastructure - emphasizing zero-recovery operation and extended thermal capability.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPSC12065D supports continuous operation with case temperature up to 145 °C, as specified for its 12 A average forward current rating. At higher case temperatures, derating is required per the I_F(AV) vs. T_C curve in Figure 3 of DS11623. Operation beyond 145 °C case temperature risks exceeding the 175 °C maximum junction temperature, especially under high thermal resistance mounting conditions.

Does STPSC12065D require a heatsink in a 12 A PFC application?

Yes - a heatsink is mandatory. With R_th(j-c) = 1.25 °C/W max and 1.02×I_F(AV) + 0.065×I_F(RMS)² conduction loss calculation, dissipation exceeds 15 W at 12 A. Without a heatsink, junction temperature would exceed 175 °C within seconds. A minimum 15 cm² copper pour with 70 µm thickness reduces R_th(j-a) to ~40 °C/W, but forced-air or extruded aluminum is recommended for sustained loads.

Can STPSC12065D replace a silicon fast recovery diode in an existing PFC board?

Yes, with layout verification. The TO-220AC footprint is identical, but electrical behavior differs significantly: no reverse recovery means reduced snubber stress and lower EMI, but also higher dV/dt susceptibility on the cathode node. Layout must minimize cathode loop inductance, and gate drivers may need adjusted slew-rate control to avoid false triggering from capacitive coupling.

Is STPSC12065D compliant with IEC 60664-1 for reinforced insulation?

No - STPSC12065D in TO-220AC does not meet IEC 60664-1 reinforced insulation creepage requirements. Its package provides standard creepage; the D²PAK HV variant (STPSC12065G2-TR) achieves 5.38 mm anode-to-cathode creepage, satisfying reinforced insulation at 650 V working voltage. For TO-220AC use, external creepage barriers or conformal coating are required to meet the standard.