Vishay General Semiconductor - Diodes Division 2KBP04M-E4/45

Overview

2KBP04M-E4/45 from Vishay General Semiconductor is a glass passivated single-phase bridge rectifier rated for 400 V repetitive peak reverse voltage (VRRM), 2 A average forward output current (IF(AV)) at 55 °C, and 60 A non-repetitive surge current (IFSM), used in AC-to-DC full-wave rectification for switching power supplies and consumer-grade office equipment.

For engineers reviewing the 2KBP04M-E4/45 datasheet, 2KBP04M-E4/45 pinout, 2KBP04M-E4/45 application, or 2KBP04M-E4/45 equivalent, key selection criteria include its KBPM package thermal resistance (RθJA = 30 °C/W), low forward voltage drop (VF = 1.1 V), RoHS-compliant construction, and UL recognition (E54214) for safety-critical board-level integration.

Technical Context

This device integrates four silicon diodes in a single-phase bridge configuration with silver-plated leads solderable per J-STD-002 and JESD22-B102. Its glass passivation ensures stable reverse leakage (IR = 5 µA at 25 °C) and high dielectric strength under transient stress.

The KBPM case uses UL 94V-0 epoxy and supports 260 °C solder dip for 40 s. Polarity is marked on body with beveled corner indicating positive output; it operates across -55 °C to +165 °C junction temperature range.

Key Specifications

Pinout & Package

Package: KBPM - molded epoxy case with 4 axial leads, UL 94V-0 rated, dimensions 0.600″ × 0.460″ × 0.160″ (15.24 mm × 11.68 mm × 4.1 mm), polarity marked by beveled corner indicating positive output terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 2KBP04M-E4/45, GBU4K offers superior thermal and current capability for demanding environments, while W04M provides a lower-cost, uncertified option with trade-offs in thermal resistance and regulatory compliance.

Availability

2KBP04M-E4/45 is available at Aetrix Electronics and suitable for switching power supplies, home appliances, and office equipment requiring stable component supply, consistent lead-time visibility, and traceable sourcing for production ramp-up.

Supply support for 2KBP04M-E4/45 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 and application-specific optimization.

The 2KBP04M-E4/45 belongs to Vishay's KBPM-series glass-passivated bridge rectifiers, engineered for high-surge, space-constrained AC/DC front-end designs in consumer and commercial power systems.

FAQ

What is the maximum operating junction temperature for 2KBP04M-E4/45?

The 2KBP04M-E4/45 has a maximum junction temperature (TJ max.) of +165 °C, validated per Vishay Document Number 88532. This rating allows sustained operation in thermally demanding environments such as enclosed power supplies or high-ambient-temperature appliances. Derating curves in the datasheet specify usable IF(AV) reduction above 55 °C ambient, and thermal design must account for RθJA = 30 °C/W on standard PCB layouts. Always verify actual TJ using measured case temperature and power dissipation in final application.

Does 2KBP04M-E4/45 meet UL safety standards?

Yes, the 2KBP04M-E4/45 carries UL recognition file number E54214, confirming compliance with UL/CSA 60747-1 for discrete semiconductors. This certification covers flammability (UL 94V-0 epoxy), dielectric strength, and construction integrity. The E4 suffix denotes consumer-grade qualification, and the device is approved for use in end products requiring UL listing-provided system-level safety design (e.g., creepage/clearance, fusing) is fully implemented per applicable standards.

What does the "E4/45" suffix mean in 2KBP04M-E4/45?

The "E4" suffix indicates Vishay's consumer-grade reliability screening level, including temperature cycling and high-temperature storage tests per internal specification. The "/45" denotes packaging in 30-piece tubes (package code 45). This differs from /51 (600-piece anti-static trays). Both packaging formats maintain identical electrical and thermal specifications for the 2KBP04M-E4/45 device; the suffix does not affect performance, only qualification level and delivery format.

Can 2KBP04M-E4/45 replace 2KBP04M without modification?

Yes, 2KBP04M-E4/45 is a direct replacement for 2KBP04M in all electrical, thermal, and mechanical respects. Both share identical VRRM (400 V), IF(AV) (2 A), IFSM (60 A), VF (1.1 V), and KBPM package dimensions. The E4/45 variant adds consumer-grade screening and tube packaging, but no design changes are needed-pinout, footprint, and soldering profile remain fully compatible with legacy 2KBP04M layouts.

What is the typical junction capacitance of 2KBP04M-E4/45?

The typical junction capacitance (CJ) of the 2KBP04M-E4/45 is 25 pF per diode, measured at 4.0 V reverse bias and 1 MHz frequency. This value impacts high-frequency noise coupling and EMI filter design in switching power supplies. Since the bridge contains two series-connected diodes in each conduction path, effective capacitance seen across AC inputs is approximately 12.5 pF in parallel configuration-critical for snubberless designs or EMI compliance testing at 100 kHz–30 MHz bands.