STMicroelectronics STPS630CSFY

Overview

STPS630CSFY from STMicroelectronics is an AEC-Q101-qualified dual 3 A automotive Schottky rectifier in PSMC (TO-277A) package, rated for 30 V repetitive peak reverse voltage, 150 °C max junction temperature, and typ. 0.32 V forward voltage at 3 A/125 °C - optimized for secondary rectification and freewheeling in DC/DC converters.

For engineers reviewing the STPS630CSFY datasheet, STPS630CSFY pinout, STPS630CSFY application, or STPS630CSFY equivalent, key selection criteria include dual-diode thermal coupling, low VF at high Tj, surge current capability (120 A), and ECOPACK2 compliance for automotive ECU reverse polarity protection.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 30 V/3 A diodes sharing a thermally efficient PSMC (TO-277A) case with Rth(j-c) = 1.50 °C/W. Its VF remains stable across -40 °C to 150 °C, enabling reliable operation in engine bay environments.

Reverse leakage is tightly controlled (≤35 mA at 125 °C, VR = 30 V), and surge rating supports transient-heavy loads like solenoid drivers. The device avoids thermal runaway under (dPtot/dTj) < (1/Rth(j-a)) conditions when properly heatsinked.

Key Specifications

Pinout & Package

The STPS630CSFY uses a 3-terminal PSMC (TO-277A) package with common cathode configuration: terminals are Anode 1, Anode 2, and Cathode (shared).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSS40300DDWFT1G and VS-6CWQ03FNTR-M3, STPS630CSFY uniquely combines AEC-Q101 qualification, 150 °C operation, lowest VF at high temperature, and PSMC's superior thermal resistance - making it the only choice for under-hood DC/DC and ECU protection where thermal density and reliability are critical.

Availability

STPS630CSFY is available at Aetrix Electronics and suitable for automotive ECU design, start-stop power conversion, and body control module development requiring stable component supply and long-term lifecycle assurance.

Supply support for STPS630CSFY 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STPS630CSFY belongs to ST's automotive-qualified power Schottky rectifier family, engineered specifically for high-efficiency, high-reliability secondary-side rectification and reverse polarity protection in space-constrained vehicle electronics.

FAQ

What is the maximum continuous current per diode at 140 °C case temperature?

The STPS630CSFY supports 3 A average forward current per diode at Tc = 140 °C, as specified in Table 1 of DS13539. This rating assumes δ = 0.5 duty cycle and proper PCB copper thermal relief. Total device current is 6 A, but both diodes share thermal mass - simultaneous full-load operation requires verification against Rth(j-c) = 1.50 °C/W and ambient constraints.

Does STPS630CSFY require a heatsink for 6 A total operation?

No external heatsink is required if the cathode pad is connected to ≥6 cm² of 70 µm copper on FR4 (per Figure 7). At Tc = 140 °C and 6 A total, junction temperature reaches ~145 °C - within the 150 °C limit. Smaller copper areas necessitate derating or forced-air cooling to maintain reliability.

How does the 0.32 V VF at 125 °C compare to typical Schottky diodes?

Most automotive Schottkys specify VF ≥ 0.45 V at 3 A/25 °C and degrade to ≥0.50 V at 125 °C. STPS630CSFY's 0.32 V (typ.) at 3 A/125 °C reflects optimized metal-semiconductor interface and low-resistance metallization - verified in Figure 5 of DS13539 - delivering ~35% lower conduction loss than industry-standard equivalents at high temperature.

Is STPS630CSFY pin-compatible with other TO-277A dual Schottkys?

Yes - the PSMC (TO-277A) outline is standardized per JEDEC MO-230. STPS630CSFY shares identical mechanical dimensions and terminal arrangement with alternatives like STPS630CSFY's direct replacements (e.g., STPS630CSFY-TR), but electrical parameters (VF, IR, IFSM) differ. Always verify thermal and electrical specs before substitution.