Diodes Incorporated SBRT3M40P1-7

Overview

SBRT3M40P1-7 from Diodes Incorporated is a 40 V, 3 A trench super barrier rectifier (SBR) in the POWERDI®123 package, optimized for MR16 LED driver bridge rectification with ultra-low VF (0.53 V max at 3 A, 25°C), <30 µA IR at 40 V/25°C, and stable performance up to +150°C junction temperature.

For engineers reviewing the SBRT3M40P1-7 datasheet, SBRT3M40P1-7 pinout, SBRT3M40P1-7 application, or SBRT3M40P1-7 equivalent, key selection criteria include forward voltage stability across temperature, reverse leakage at high TJ, thermal resistance (RθJA = 78°C/W), compact 1.1 mm profile, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This SBR leverages trench MOS-controlled architecture to achieve lower VF than standard Schottky diodes while suppressing thermal runaway via reduced high-temperature IR-measured at ≤15 µA at 40 V/125°C. Its low RθJC (16°C/W) enables efficient heat transfer to PCB copper in space-constrained MR16 modules.

The device operates as a unidirectional power rectifier with cathode-band polarity marking, rated for 70 A non-repetitive surge (8.3 ms half-sine), and supports continuous operation from –65°C to +150°C ambient without derating below 125°C.

Key Specifications

Pinout & Package

Packaged in the surface-mount POWERDI®123 (JEDEC TO-277A equivalent), this 3-terminal device features a single anode–cathode–cathode configuration with cathode band marking. The 1.0 mm typical height and 3.7 mm × 1.78 mm footprint enable thin-profile LED driver integration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super barrier rectifier applications.

Compared with SBRT3M40P1-7, the Q-suffix variant adds traceability without electrical trade-offs, while the U-suffix offers lower cost at the expense of VF and IR performance-making the M-version optimal for thermally constrained, high-reliability LED and automotive uses.

Availability

SBRT3M40P1-7 is available at Aetrix Electronics and suitable for MR16 LED drivers, automotive interior lighting modules, and industrial control power supplies requiring stable component supply, AEC-Q101 compliance, and ultra-low-profile rectification.

Supply support for SBRT3M40P1-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management and signal integrity solutions for automotive, industrial, and consumer markets.

The SBRT series belongs to Diodes' Trench Super Barrier Rectifier product line, engineered specifically to replace Schottky diodes in high-temperature, high-reliability rectification applications where thermal runaway and VF drift must be eliminated.

FAQ

What is the maximum junction temperature for continuous operation?

The SBRT3M40P1-7 is rated for continuous operation from –65°C to +150°C junction temperature. Its thermal design supports sustained 3 A conduction at +125°C ambient when mounted on ≥1 inch² FR4 with 2 oz copper, verified by RθJA = 78°C/W and derating curve in Figure 5.

Is SBRT3M40P1-7 pin-compatible with standard Schottky diodes in POWERDI-123?

Yes-SBRT3M40P1-7 uses the same POWERDI-123 footprint and 3-pin anode/cathode/cathode layout as industry-standard Schottky rectifiers (e.g., ZLLS400BT), enabling drop-in replacement without PCB redesign, provided thermal and electrical margins are validated.

Does this part require special PCB layout considerations?

Yes-its low RθJC (16°C/W) requires direct thermal connection of both cathode pads to ≥10 mm² internal or external copper pour. The recommended pad layout (AP02001) specifies 2.8 mm × 1.78 mm solder mask openings and 0.3 mm stencil aperture for optimal thermal transfer and solder joint reliability.

How does its AEC-Q101 qualification differ from standard industrial grade?

AEC-Q101 certification includes stress testing beyond JEDEC standards: 1000-hour HTOL at 150°C, ESD ≥2 kV HBM, and temperature cycling from –40°C to +125°C for 1000 cycles-ensuring robustness in automotive underhood environments where vibration, thermal shock, and long service life are critical.