DB157G Bridge Rectifier Single Phase 1 kV 1.5 A Equivalent & Substitute Parts

Part Overview

The DB157G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 1 kV peak reverse voltage and 1.5 A 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 AC-to-DC conversion applications requiring standard rectification performance. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the 1 kV, 1-2 A rectified current range and Through Hole mounting configuration.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	1 kV
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max)	1.1 V @ 1.5 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-EDIP (0.321", 8.15mm)
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility for the DB157G is determined by the following criteria:

Primary Matching Parameters:

Voltage - Peak Reverse (Max): 1 kV (exact match required)
Diode Type: Single Phase (exact match required)
Mounting Type: Through Hole (exact match required)
Operating Temperature Range: -55°C ~ 150°C (exact match required)
Package / Case: 4-EDIP form factor with 0.321" (8.15mm) spacing (exact match required)

Secondary Compatibility Parameters:

Current - Average Rectified (Io): 1 A to 2 A (acceptable range; 1.5 A is nominal)
Voltage - Forward (Vf) (Max): 1.1 V (standard specification across all candidates)
Current - Reverse Leakage @ Vr: 5-10 µA @ 1000 V (acceptable range)

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

Group 1 - Direct Current Rating Match (1.5 A):

DF10M (onsemi): Matches 1.5 A current rating and 5 µA reverse leakage specification

Group 2 - Lower Current Rating (1 A):

DB107-BP (Micro Commercial Co): 1 A current rating
DF10-G (Comchip Technology): 1 A current rating

Group 3 - Higher Current Rating (2 A):

DF210-G (Comchip Technology): 2 A current rating

All substitute parts maintain identical voltage specifications, operating temperature range, and Through Hole mounting configuration.

Parameter Comparison

Parameter	DB157G (GeneSiC)	DB107-BP (Micro Commercial)	DF10-G (Comchip)	DF10M (onsemi)	DF210-G (Comchip)
Voltage - Peak Reverse (Max)	1 kV	1 kV	1 kV	1 kV	1 kV
Current - Average Rectified (Io)	1.5 A	1 A	1 A	1.5 A	2 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	5 µA @ 1000 V	10 µA @ 1000 V
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-EDIP (0.321", 8.15mm)	4-EDIP (0.321", 8.15mm)	4-EDIP (0.321", 8.15mm)	4-EDIP (0.300", 7.62mm)	4-EDIP (0.321", 8.15mm)
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard	Standard
Product Status	Active	Active	Active	Obsolete	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection - Direct Equivalent: DF10M (onsemi) provides the closest electrical match with identical 1.5 A current rating and 5 µA reverse leakage specification. However, DF10M is classified as Obsolete product status. Selection of this part requires confirmation of long-term availability and supply chain continuity.

Active Product Alternatives:

For applications requiring Active product status with current rating at or above 1.5 A, DF210-G (Comchip Technology) is the recommended substitute. This part maintains all voltage, temperature, and mounting specifications while providing 2 A current capacity. The higher current rating provides design margin for thermal and electrical stress conditions.

For applications with current requirements at 1 A or lower, DB107-BP (Micro Commercial Co) and DF10-G (Comchip Technology) are functionally equivalent. Both maintain Active product status and full compliance certifications. DF10-G offers higher inventory availability (10,318 pcs) compared to DB107-BP (1,150 pcs).

Compliance Considerations: All substitute parts maintain RoHS3 compliance and REACH Unaffected status. The DB157G is RoHS Compliant; all substitutes are ROHS3 Compliant, representing equivalent or enhanced environmental compliance.

Package Compatibility Note: DF10M features a 4-EDIP package with 0.300" (7.62mm) spacing, differing from the DB157G standard 0.321" (8.15mm) spacing. PCB layout verification is required if DF10M is selected as a substitute.

Frequently Asked Questions (FAQ)

Q: Can DB107-BP or DF10-G be used as direct replacements for DB157G in applications rated for 1.5 A?

A: DB107-BP and DF10-G are rated for 1 A average rectified current, compared to DB157G at 1.5 A. These parts are suitable for applications with maximum current requirements of 1 A. For applications requiring the full 1.5 A capacity, these substitutes operate at 150% of their rated current and are not recommended without circuit redesign or thermal management modifications.

Q: What is the significance of the 5 µA versus 10 µA reverse leakage specification difference?

A: Reverse leakage current affects heat dissipation and circuit performance in high-impedance applications. DB157G and DF10M specify 5 µA reverse leakage, while DB107-BP, DF10-G, and DF210-G specify 10 µA. The 5 µA specification represents lower leakage performance. For most standard rectification applications, both specifications are acceptable. Applications with stringent leakage requirements should prioritize parts with 5 µA specification.

Q: Is DF10M a viable substitute despite Obsolete product status?

A: DF10M is classified as Obsolete but maintains 2,100 pcs inventory availability. Obsolete status indicates the manufacturer has discontinued active production and support. Selection of DF10M requires verification of long-term supply availability and acceptance of potential future unavailability. For new designs or long-term production requirements, Active status parts (DF210-G, DF10-G, or DB107-BP) are recommended.

Q: Why does DF10M have different package spacing (0.300" vs 0.321")?

A: DF10M uses 4-EDIP package with 0.300" (7.62mm) spacing, while DB157G and most other substitutes use 0.321" (8.15mm) spacing. This 0.021" difference affects PCB pad layout and component placement. Direct PCB substitution without layout modification is not possible. DF10M requires either PCB redesign or use of adapter components.

Q: Which substitute part offers the best inventory availability?

A: DF10-G (Comchip Technology) provides the highest inventory availability at 10,318 pcs. DF210-G (Comchip Technology) offers 9,893 pcs. Both parts are manufactured by Comchip Technology and maintain Active product status with full compliance certifications.

Q: Can DF210-G (2 A rating) be used in place of DB157G (1.5 A rating)?

A: Yes. DF210-G is rated for 2 A average rectified current, exceeding the DB157G 1.5 A requirement. The higher current rating provides design margin and thermal headroom. All other electrical specifications (voltage, temperature range, forward voltage) are identical. DF210-G is a suitable upgrade substitute for applications where higher current capacity is acceptable or beneficial.

Q: Are all substitute parts pin-compatible with DB157G?

A: All substitute parts use 4-EDIP (Through Hole) package configuration with Single Phase bridge rectifier pinout. Pin compatibility is maintained across DB157G, DB107-BP, DF10-G, and DF210-G. DF10M maintains electrical pin compatibility but requires PCB layout verification due to different package spacing (0.300" vs 0.321").

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