Diodes Incorporated MB352W-F

Overview

MB352W-F from Diodes Incorporated is a high-current silicon bridge rectifier with 200 V maximum recurrent peak reverse voltage, 35 A average rectified output current at TC = 55°C, and 400 A non-repetitive peak forward surge current; it features solderable universal terminals (0.25" Faston), metal case for superior thermal conduction, and is used in industrial AC/DC power supplies requiring robust 60 Hz rectification.

For engineers reviewing the MB352W-F datasheet, MB352W-F pinout, MB352W-F application, or MB352W-F equivalent, key selection criteria include thermal resistance (R_JC = 2.5 °C/W), UL 94V-0 case flammability rating, RoHS-compliant lead-free finish (date code 0514+), and bolt-down mounting with thermal compound for heat-sink coupling.

Technical Context

This device implements a single-phase full-wave bridge configuration using four silicon diodes integrated into a high-conductivity metal case. It operates with AC input across two terminals and delivers DC output across the remaining two, supporting resistive or inductive loads at 60 Hz.

Thermal performance is defined by junction-to-case resistance of 2.5 °C/W and requires mechanical mounting with silicone thermal compound and #10 screw (20 in·lb max torque). Reverse leakage is specified as 10 µA at 25°C and 1.0 mA at 100°C under rated DC blocking voltage.

Key Specifications

Pinout & Package

Package: Metal case with four insulated terminals (two AC inputs, one positive DC output, one negative DC output); mounting via #10 screw hole; 29 g mass; dimensions A=28.4–28.7 mm, B=10.97–11.23 mm, C=15.5–17.6 mm, E=22.86–25.4 mm, G=13.3–15.3 mm, J=17.1–19.1 mm, K=10.4–12.4 mm, M=30.5 mm, N=10.97–11.23 mm, P=17.1–19.1 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current bridge rectifier applications.

Compared with MB352W-F, GBPC3505 trades metal-case thermal efficiency for lower cost and smaller footprint, while GBPC3510 adds voltage headroom at no thermal penalty-but neither replicates the bolt-down metal-case mounting or 2.5 °C/W R_JC of the MB352W-F.

Availability

MB352W-F is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive front-end rectification, and uninterruptible power supply (UPS) input stages requiring stable component supply and long-term manufacturability.

Supply support for MB352W-F 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The MB series bridges belong to Diodes' high-current discrete rectifier product line, engineered specifically for industrial power conversion where thermal reliability, mechanical robustness, and surge resilience are critical.

FAQ

What is the correct mounting procedure for MB352W-F?

MB352W-F must be bolted to a flat, clean heatsink using a #10 screw at ≤20 in·lb torque, with silicone thermal compound applied between the metal case and heatsink surface. Mounting position is fixed-no orientation dependency. Avoid overtightening to prevent case deformation or internal bond-wire damage.

Does MB352W-F require derating above 55°C case temperature?

Yes. The 35.0 A average output current rating applies only at T_C = 55°C. Derating follows Fig. 2 in DS21303 Rev. 7: at T_C = 100°C, maximum I(AV) drops to ~23 A; at T_C = 125°C, it falls to ~15 A. Ambient temperature alone is insufficient-case temperature must be measured at the mounting surface.

Is MB352W-F pin-compatible with GBPC35xx series devices?

No. MB352W-F uses a metal-case, bolt-down, four-terminal layout with Faston-compatible leads; GBPC35xx devices are plastic-packaged, PCB-mountable, and have different terminal geometry and spacing. Mechanical and thermal interfaces are incompatible-no drop-in replacement exists.

Why is MB352W-F marked "Not Recommended for New Design"?

Diodes Incorporated recommends GBPC35xx series for new designs due to improved manufacturability, broader distribution, and enhanced process control. MB352W-F remains fully supported and available, with identical electrical specs-but newer designs should evaluate GBPC3505/3510 for long-term supply assurance and packaging flexibility.