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W04G Bridge Rectifier Single Phase 400V 1.5A Equivalent & Substitute Parts
Part Overview
The W04G is a single-phase bridge rectifier rated for 400V peak reverse voltage with 1.5A average rectified current, designed for through-hole mounting applications. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and new design implementations. The W04G serves as a standard rectification solution in power supply circuits requiring moderate voltage and current ratings with through-hole package compatibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Diode Type | Single Phase |
| Technology | Standard |
| Voltage - Peak Reverse (Max) | 400 V |
| Current - Average Rectified (Io) | 1.5 A |
| Voltage - Forward (Vf) (Max) @ If | 1 V @ 1 A |
| Current - Reverse Leakage @ Vr | 5 µA @ 400 V |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | 4-Circular |
Substitute Part Grouping Explanation
Substitution of the W04G is determined by strict equivalence across the following critical parameters:
- Diode Type: Single Phase bridge rectifier configuration
- Voltage Rating: 400V peak reverse voltage (Vrrm)
- Current Rating: 1.5A average rectified current (Io)
- Forward Voltage: 1V maximum at 1A forward current
- Reverse Leakage: 5µA maximum at 400V reverse voltage
- Operating Temperature: -55°C to 150°C junction temperature range
- Mounting Technology: Through-hole package format
- Package Geometry: 4-Circular configuration
The W04G-E4/51 meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent despite manufacturer and package designation differences.
Parameter Comparison
| Parameter | W04G (onsemi) | W04G-E4/51 (Vishay) | Match Status |
|---|---|---|---|
| Diode Type | Single Phase | Single Phase | Equivalent |
| Technology | Standard | Standard | Equivalent |
| Voltage - Peak Reverse (Max) | 400 V | 400 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 @ 400 V | 5 µA @ 400 V | Equivalent |
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | Equivalent |
| Mounting Type | Through Hole | Through Hole | Equivalent |
| Package / Case | 4-Circular, WOB | 4-Circular, WOG | Compatible |
| Product Status | Obsolete | Active | Substitute Available |
| RoHS Status | Not Specified | ROHS3 Compliant | Enhanced Compliance |
Engineering Selection Recommendations
The W04G-E4/51 from Vishay General Semiconductor - Diodes Division is a direct electrical and mechanical equivalent for the obsolete W04G. Selection of the W04G-E4/51 is supported by:
- Complete electrical parameter equivalence across all specified ratings and operating conditions
- Active product status ensuring ongoing availability and supply chain continuity
- ROHS3 compliance certification, providing enhanced environmental and regulatory alignment
- Identical through-hole mounting configuration and 4-circular package geometry
- Maintained operating temperature range of -55°C to 150°C
- Equivalent forward voltage and reverse leakage characteristics
The package designation change from WOB to WOG reflects manufacturer-specific nomenclature while maintaining physical and electrical compatibility for through-hole circuit board applications.
Frequently Asked Questions (FAQ)
Q: Can the W04G-E4/51 be used as a direct replacement for the W04G in existing designs?
A: Yes. The W04G-E4/51 meets all electrical specifications (400V, 1.5A, 1V forward voltage, 5µA reverse leakage) and maintains identical through-hole mounting and 4-circular package geometry. No circuit modifications are required.
Q: What is the significance of the package designation change from WOB to WOG?
A: WOB and WOG are manufacturer-specific package designations for the 4-circular through-hole configuration. Both designations refer to physically and electrically compatible packages suitable for the same circuit board layouts.
Q: Does the W04G-E4/51 operate within the same temperature range as the W04G?
A: Yes. Both components operate across the identical temperature range of -55°C to 150°C junction temperature, ensuring thermal compatibility in all specified operating environments.
Q: What compliance advantage does the W04G-E4/51 provide?
A: The W04G-E4/51 carries ROHS3 compliance certification, whereas the W04G product status does not specify compliance. This provides enhanced regulatory alignment for applications subject to environmental and hazardous substance restrictions.
Q: Is the W04G-E4/51 currently available?
A: Yes. The W04G-E4/51 maintains active product status with documented inventory availability, whereas the W04G is classified as obsolete and subject to supply discontinuation.
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