DB154G Bridge Rectifier Single Phase 400V 1.5A Equivalent & Substitute Parts

Part Overview

The DB154G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 400V peak reverse voltage and 1.5A average rectified current. This component is classified as Active product status and is RoHS Compliant. Bridge rectifiers in this voltage and current class are used in power supply circuits, battery charging systems, and AC-to-DC conversion applications where single-phase rectification is required. Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative sourcing from qualified manufacturers.

Substiute Parts

DB154G

GeneSiC SemiconductorIn Stock: 858DB154G Datasheet

Current PartRFQ

DB104-BP

Micro Commercial CoIn Stock: 7539DB104-BP Datasheet

SimilarRFQ

DF04-G

Comchip TechnologyIn Stock: 1397DF04-G Datasheet

SimilarRFQ

DF04M

onsemiIn Stock: 40296DF04M Datasheet

SimilarRFQ

DF204-G

Comchip TechnologyIn Stock: 2169DF204-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DB154G is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Voltage - Peak Reverse (Max): 400V (exact match required)
• Diode Type: Single Phase (exact match required)
• Technology: Standard (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C to 150°C (exact match required)

Secondary Matching Criteria:

• Current - Average Rectified (Io): 1.5A or higher
• Voltage - Forward (Vf) (Max): 1.1V or lower at rated current
• Current - Reverse Leakage: 5µA or lower at 400V
• Package / Case: 4-EDIP form factor with compatible pin spacing

Substitute parts are grouped into two categories based on current rating alignment:

Category A - Full Current Rating Match (1.5A): Parts with 1.5A average rectified current provide direct functional equivalence without circuit derating.

Category B - Reduced Current Rating (1.0A to 1.4A): Parts with lower current ratings require circuit analysis to confirm adequate margin for the application's maximum load current.

Parameter Comparison

Engineering Selection Recommendations

Recommended Substitutes (Active Product Status):

DF04-G (Comchip Technology) - Active product status. Meets all critical electrical parameters with 400V peak reverse voltage and -55°C to 150°C operating range. Current rating of 1A requires verification that circuit load does not exceed this limit. Package dimensions (0.321", 8.15mm) are identical to DB154G. ROHS3 Compliant with REACH Unaffected status. Suitable for new designs and long-term availability.

DF204-G (Comchip Technology) - Active product status. Exceeds current requirement at 2A average rectified current, providing design margin. All electrical parameters meet or exceed DB154G specifications. Package dimensions (0.321", 8.15mm) are identical to DB154G. ROHS3 Compliant with REACH Unaffected status. Suitable for applications requiring higher current capacity or design margin.

Conditional Substitutes (Not For New Designs / Obsolete Status):

DB104-BP (Micro Commercial Co) - Product status is Not For New Designs. Current rating of 1A requires circuit load verification. Reverse leakage current of 10µA exceeds DB154G specification of 5µA. Identical package dimensions (0.321", 8.15mm). ROHS3 Compliant. Use only when inventory constraints prevent use of Active status alternatives.

DF04M (onsemi) - Product status is Obsolete. Current rating of 1.5A matches DB154G exactly. Reverse leakage current of 5µA matches DB154G specification. Package dimensions (0.300", 7.62mm) differ from DB154G (0.321", 8.15mm), requiring PCB layout verification for pin spacing compatibility. ROHS3 Compliant. Use only when no Active alternatives are available and mechanical compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can DB104-BP be used as a direct replacement for DB154G?

A: DB104-BP meets the 400V voltage requirement and operating temperature range. However, the 1A current rating is lower than DB154G's 1.5A rating. Substitution is valid only if the circuit's maximum load current does not exceed 1A. Additionally, DB104-BP carries "Not For New Designs" status, limiting its use to legacy system maintenance.

Q: What is the difference between DF04-G and DF204-G?

A: Both parts are manufactured by Comchip Technology with Active product status and identical package dimensions (0.321", 8.15mm). The primary difference is current rating: DF04-G is rated for 1A average rectified current, while DF204-G is rated for 2A. DF204-G provides higher current capacity and design margin. Selection depends on circuit load requirements.

Q: Is DF04M compatible with DB154G in terms of physical installation?

A: DF04M uses a 4-EDIP package with 0.300" (7.62mm) spacing, while DB154G uses 4-EDIP with 0.321" (8.15mm) spacing. The difference in pin spacing requires PCB layout verification before installation. Electrical parameters are compatible, but mechanical fit must be confirmed for the specific PCB design.

Q: Why does DF04M have Obsolete status despite having 1.5A current rating?

A: DF04M is classified as Obsolete by onsemi, indicating the manufacturer has discontinued production and support. Although electrical specifications match DB154G, the obsolete status limits availability and future technical support. Active alternatives such as DF04-G or DF204-G are preferred for new designs and ongoing production.

Q: What does "Not For New Designs" mean for DB104-BP?

A: This status indicates that Micro Commercial Co has designated DB104-BP for legacy system support only. The part remains available but is not recommended for incorporation into new product designs. For new designs, Active status alternatives such as DF04-G or DF204-G should be selected.

Q: Are all substitute parts RoHS compliant?

A: Yes. DB154G is RoHS Compliant. All substitute parts (DB104-BP, DF04-G, DF04M, DF204-G) are ROHS3 Compliant, meeting current RoHS requirements. All parts are REACH Unaffected or have equivalent compliance status.

Q: What is the significance of reverse leakage current differences?

A: DB154G and DF04M specify 5µA reverse leakage at 400V. DB104-BP, DF04-G, and DF204-G specify 10µA at 400V. In most applications, this difference is negligible. However, in high-impedance circuits or precision analog applications, the lower leakage of DB154G or DF04M may be preferred. Circuit analysis determines whether the 10µA specification is acceptable.

Q: Can DF204-G be used in place of DB154G if the circuit only requires 1.5A?

A: Yes. DF204-G is rated for 2A average rectified current, which exceeds the 1.5A requirement of DB154G. All other electrical parameters (400V peak reverse voltage, 1.1V forward voltage, -55°C to 150°C operating range) are equivalent or superior. The higher current rating provides design margin without adverse effects. DF204-G is Active status and suitable for new designs.