Vishay General Semiconductor - Diodes Division S4PB-M3/86A

Overview

S4PB-M3/86A from Vishay General Semiconductor is a high-current-density, glass-passivated surface-mount rectifier diode in the eSMP® series, rated for 100 V repetitive peak reverse voltage (V_RRM), 4.0 A average forward current (I_F(AV)), and 100 A non-repetitive surge current (I_FSM). It features a low 0.860 V forward voltage at 4 A, 150 °C maximum junction temperature, and is packaged in SMPC (TO-277A) with matte tin-plated leads.

For engineers reviewing the S4PB-M3/86A datasheet, S4PB-M3/86A pinout, S4PB-M3/86A application, or S4PB-M3/86A equivalent, this device is selected for compact, high-efficiency AC/DC rectification in space-constrained power supplies, automotive DC-DC converters, and telecom inverters where low profile (1.1 mm height), MSL Level 1 solderability, and AEC-Q101-compliant variants are critical.

Technical Context

The S4PB-M3/86A is a single silicon PN-junction rectifier with glass-passivated chip construction, optimized for fast recovery (t_rr = 2.5 µs typical) and low thermal resistance (R_θJL = 4 °C/W). Its SMPC (TO-277A) package enables automated placement and supports high-power density layouts on 1 oz. copper PCBs.

It operates across –55 °C to +150 °C junction temperature range, exhibits only 10 µA reverse leakage at rated V_RRM and 25 °C, and maintains stable forward conduction down to –40 °C, making it suitable for industrial and automotive environments requiring robust thermal and electrical performance under transient load conditions.

Key Specifications

Pinout & Package

Package: SMPC (TO-277A), 3-terminal surface-mount case with anode-cathode-anode configuration, 1.1 mm typical height, UL 94 V-0 molding compound, halogen-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S4PBHM3_A and MUR4100CT, the S4PB-M3/86A delivers optimal balance of low-profile packaging, low V_F, fast recovery, and commercial-grade cost-making it ideal for next-generation compact power supplies where PCB area and thermal management are primary constraints.

Availability

S4PB-M3/86A is available at Aetrix Electronics and suitable for AC/DC adapters, automotive DC-DC converters, and telecom power supplies requiring stable component supply, consistent tape-and-reel delivery, and long-term manufacturing continuity.

Supply support for S4PB-M3/86A 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and application-specific optimization.

The eSMP® series-including S4PB-M3/86A-is engineered for high-current, low-profile surface-mount rectification in space-constrained power conversion systems across consumer, industrial, and automotive markets.

FAQ

What is the maximum junction temperature rating for the S4PB-M3/86A?

The S4PB-M3/86A has a maximum junction temperature (T_J(max)) of +150 °C, verified per Vishay's thermal characterization data. This rating allows reliable operation in high-ambient environments such as under-hood automotive locations or enclosed industrial power supplies. Derating curves in the datasheet define safe I_F(AV) limits above 25 °C ambient, and the device must be mounted on the specified 1 oz. copper pad layout to achieve this rating. The S4PB-M3/86A achieves this performance using a glass-passivated silicon die in the SMPC package.

Does the S4PB-M3/86A meet lead-free reflow requirements?

Yes, the S4PB-M3/86A meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, and its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards. It passes JESD 201 class 1A whisker testing, ensuring reliability in high-vibration or long-life applications. No pre-baking is required before reflow, simplifying manufacturing flow. The S4PB-M3/86A is halogen-free and RoHS-compliant per Vishay document 99912.

What is the reverse recovery time (t_rr) of the S4PB-M3/86A and how is it measured?

The S4PB-M3/86A has a typical reverse recovery time (t_rr) of 2.5 µs, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per JEDEC test methods. This fast recovery reduces switching losses and high-frequency noise in DC-DC converters operating up to ~100 kHz. The value is confirmed in Vishay document 89032, Figure 6, and remains stable across –40 °C to +125 °C. The S4PB-M3/86A achieves this via optimized doping and lifetime control in its glass-passivated junction.

Can the S4PB-M3/86A be used as a direct replacement for through-hole rectifiers like the 1N5408?

No-the S4PB-M3/86A is not a direct replacement for the 1N5408 due to fundamental differences in package (SMPC vs. DO-201AD), thermal path (PCB-conducted vs. lead-conducted), and electrical behavior (2.5 µs t_rr vs. ~2 µs but higher V_F). While both handle 4 A average current, the S4PB-M3/86A requires redesigned PCB pads and layout. However, in new designs, the S4PB-M3/86A offers superior power density and efficiency. Always verify layout and thermal performance before substituting the S4PB-M3/86A.

What does the "/86A" suffix indicate in S4PB-M3/86A?

"/86A" denotes the tape-and-reel packaging option: 7-inch diameter plastic tape and reel containing 1500 units, with "86A" being Vishay's internal package code for that configuration. It does not affect electrical or thermal specifications. The "M3" suffix indicates halogen-free, RoHS-compliant, commercial-grade construction meeting JESD 201 class 1A whisker testing. The S4PB-M3/86A shares identical die, package dimensions, and performance with other M3-suffix variants like S4PB-M3/87A (6500-unit 13-inch reel).