Equivalent & Substitute Parts for W08M Bridge Rectifier

Part Overview

The W08M is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 800 V peak reverse voltage with 1.5 A average rectified current. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations. The W08M features a through-hole mounting configuration with a 4-circular WOM package and operates across a temperature range of -65°C to 125°C.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V
Operating Temperature Range	-65°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	4-Circular
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the W08M is determined by strict equivalence across the following critical parameters:

Voltage Rating: Peak reverse voltage of 800 V (no derating permitted)
Current Rating: Average rectified current of 1.5 A (no derating permitted)
Forward Voltage Characteristics: Maximum forward voltage of 1 V @ 1 A
Reverse Leakage: Maximum 5 µA @ 800 V
Diode Configuration: Single-phase bridge rectifier topology
Mounting Technology: Through-hole configuration
Package Form Factor: 4-circular package geometry

The W08G-E4/51 manufactured by Vishay General Semiconductor - Diodes Division meets all specified electrical and mechanical parameters for direct substitution. Both components share identical voltage, current, and leakage specifications, with compatible through-hole mounting and 4-circular package configurations.

Parameter Comparison

Parameter	W08M (GeneSiC)	W08G-E4/51 (Vishay)	Compatibility
Diode Type	Single Phase	Single Phase	Equivalent
Technology	Standard	Standard	Equivalent
Voltage - Peak Reverse (Max)	800 V	800 V	Equivalent
Current - Average Rectified (Io)	1.5 A	1.5 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A	1 V @ 1 A	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	4-Circular, WOM	4-Circular, WOG	Compatible
Operating Temperature Range	-65°C ~ 125°C (TJ)	-55°C ~ 150°C (TJ)	Substitute Exceeds Range
Product Status	Obsolete	Active	Substitute Available
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

The W08G-E4/51 is the direct substitute for the obsolete W08M bridge rectifier. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical voltage ratings (800 V peak reverse), current ratings (1.5 A average rectified), forward voltage characteristics (1 V @ 1 A), and reverse leakage specifications (5 µA @ 800 V). These parameters ensure functional interchangeability in existing circuit designs.

Mechanical Compatibility: Both components utilize through-hole mounting with 4-circular package configurations, enabling direct PCB footprint compatibility without layout modifications.

Product Status: The W08G-E4/51 maintains active product status with established supply chain availability, addressing the obsolescence of the W08M.

Compliance and Certifications: The W08G-E4/51 is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Temperature Operating Range: The W08G-E4/51 extends the operating temperature range to -55°C ~ 150°C (TJ), providing enhanced thermal performance compared to the W08M specification of -65°C ~ 125°C (TJ).

Frequently Asked Questions (FAQ)

Q: Can the W08G-E4/51 be used as a direct replacement for the W08M in existing designs?

A: Yes. The W08G-E4/51 meets all electrical specifications of the W08M, including voltage rating (800 V), current rating (1.5 A), forward voltage (1 V @ 1 A), and reverse leakage (5 µA @ 800 V). Through-hole mounting and 4-circular package compatibility enable direct PCB substitution without circuit redesign.

Q: Are there package differences between the W08M and W08G-E4/51?

A: Both components use 4-circular through-hole packages. The W08M uses the WOM package variant, while the W08G-E4/51 uses the WOG variant. These package designations reflect manufacturer-specific conventions but maintain identical physical dimensions and pinout configurations for PCB compatibility.

Q: What is the significance of the W08G-E4/51 having an extended temperature range?

A: The W08G-E4/51 operates from -55°C to 150°C (TJ), compared to the W08M range of -65°C to 125°C (TJ). This extended range provides additional thermal margin in applications approaching the upper temperature limit, though both components meet the same minimum operating specifications.

Q: Does the W08G-E4/51 require different handling or storage procedures?

A: Both components share identical moisture sensitivity levels (MSL 1 - Unlimited), indicating no special moisture control requirements during storage or handling. Standard electronic component storage practices apply to both parts.

Q: Is the W08G-E4/51 available in the same packaging format as the W08M?

A: Both components are available in through-hole configurations with 4-circular package geometry. The W08G-E4/51 is supplied in bulk packaging, while the W08M was supplied in standard packaging. This difference affects procurement and inventory management but does not impact component functionality or compatibility.

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