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DFB2040 Bridge Rectifier Equivalent & Substitute Parts
Part Overview
The DFB2040 is a single-phase bridge rectifier manufactured by onsemi, rated for 400 V peak reverse voltage and 20 A average rectified current. This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Finding equivalent or substitute parts is necessary for maintenance applications, legacy system repairs, and continued support of existing installations where the original part is no longer in production or inventory is depleted.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Diode Type | Single Phase |
| Technology | Standard |
| Voltage - Peak Reverse (Max) | 400 V |
| Current - Average Rectified (Io) | 20 A |
| Voltage - Forward (Vf) (Max) @ If | 1.1 V @ 20 A |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Through Hole |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the DFB2040 is determined by strict equivalence across the following electrical and mechanical parameters:
- Diode Type: Single Phase bridge rectifier configuration
- Voltage Rating: 400 V peak reverse voltage (Vrrm)
- Current Rating: 20 A average rectified current (Io)
- Forward Voltage: 1.1 V maximum at 20 A
- Operating Temperature: -55°C to 150°C junction temperature range
- Mounting: Through-hole technology
- Compliance: ROHS3 compliance required
The GBJ2004 manufactured by SMC Diode Solutions meets all these criteria and qualifies as a direct electrical equivalent. Both parts share identical voltage and current ratings, forward voltage characteristics, and temperature operating range. Package form factors differ (TS-6P versus GBJ), but both are through-hole mounted configurations suitable for PCB assembly.
Parameter Comparison
| Parameter | DFB2040 (onsemi) | GBJ2004 (SMC Diode Solutions) |
|---|---|---|
| Diode Type | Single Phase | Single Phase |
| Technology | Standard | Standard |
| Voltage - Peak Reverse (Max) | 400 V | 400 V |
| Current - Average Rectified (Io) | 20 A | 20 A |
| Voltage - Forward (Vf) (Max) @ If | 1.1 V @ 20 A | 1.1 V @ 20 A |
| Current - Reverse Leakage @ Vr | 10 µA @ 400 V | 5 µA @ 400 V |
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 4-SIP, TS-6P | 4-ESIP, GBJ |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active |
Engineering Selection Recommendations
The GBJ2004 is electrically equivalent to the DFB2040 across all critical parameters: voltage rating, current capacity, forward voltage drop, and operating temperature range. The GBJ2004 maintains active product status with SMC Diode Solutions, ensuring continued availability and supply chain reliability compared to the DFB2040's "Not For New Designs" classification.
Both parts are ROHS3 compliant and carry the same ECCN and HTSUS classifications, meeting regulatory requirements for equivalent component substitution. The GBJ2004 exhibits lower reverse leakage current (5 µA versus 10 µA at 400 V), representing improved performance characteristics.
Package form factor differences (TS-6P versus GBJ) require mechanical verification for PCB layout compatibility. Pin configuration and lead spacing must be confirmed against the original circuit board design before substitution.
Frequently Asked Questions (FAQ)
Q: Can the GBJ2004 directly replace the DFB2040 in all applications?
A: Electrical substitution is valid based on identical voltage, current, and temperature ratings. Mechanical compatibility must be verified. The TS-6P and GBJ package forms differ in physical dimensions and lead configuration, requiring confirmation that the GBJ2004 fits the existing PCB footprint and mounting holes.
Q: What is the significance of the reverse leakage current difference?
A: The GBJ2004 exhibits 5 µA reverse leakage at 400 V compared to 10 µA for the DFB2040. This represents superior leakage performance and does not prevent substitution; it indicates improved device characteristics that are compatible with the original design requirements.
Q: Why is the DFB2040 marked "Not For New Designs"?
A: This designation indicates onsemi has discontinued active development and marketing of this part number. Existing inventory remains available, but the product line has been superseded. The GBJ2004 from SMC Diode Solutions provides an active alternative for new applications and ongoing support.
Q: Are there compliance or certification concerns with substitution?
A: Both parts are ROHS3 compliant with identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. No additional compliance verification is required for equivalent substitution in existing designs.
Q: What should be checked before implementing the GBJ2004 as a substitute?
A: Verify PCB footprint compatibility with the GBJ package form factor. Confirm lead spacing and mounting hole alignment. Validate that the through-hole mounting method is suitable for the existing assembly process. No electrical re-qualification
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