DF1508M Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF1508M is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 800 V peak reverse voltage and 1.5 A average rectified current in a 4-EDIP (0.300", 7.62mm) through-hole package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute parts must maintain electrical compatibility within the specified voltage and current ratings while accommodating mechanical and packaging variations.

Key Parameters

Parameter	DF1508M Value
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1.5 A
Current - Reverse Leakage @ Vr	10 µA @ 800 V
Operating Temperature Range	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-EDIP (0.300", 7.62mm)
Diode Type	Single Phase
Technology	Standard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the DF1508M is determined by the following critical parameters:

Voltage Rating: Substitute parts must support 800 V peak reverse voltage or higher to maintain electrical safety margins
Current Rating: Substitute parts must support 1.5 A average rectified current or higher
Forward Voltage: Maximum forward voltage drop of 1.1 V @ rated current
Reverse Leakage: Maximum 10 µA @ 800 V
Mounting Type: Through-hole configuration required
Package Compatibility: Physical dimensions must accommodate 4-EDIP footprint or compatible pinout

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical Equivalents (800 V, 1.5 A): Parts matching both voltage and current ratings with identical electrical characteristics.

Category 2 - Voltage-Rated Equivalents (600 V, 1 A minimum): Parts with lower current ratings (1 A) that may be used in applications where the full 1.5 A capacity is not required, provided the 800 V voltage rating is maintained or exceeded.

Parameter Comparison

Part Number	Manufacturer	Voltage (V)	Current (A)	Vf (Max) @ If	Reverse Leakage @ Vr	Temp Range (°C)	Package	Product Status
DF1508M	Diodes Incorporated	800	1.5	1.1 V @ 1.5 A	10 µA @ 800 V	-65 ~ 150	4-EDIP (0.300")	Obsolete
DB156-BP	Micro Commercial Co	800	1.5	1.1 V @ 1.5 A	10 µA @ 800 V	-55 ~ 150	4-EDIP (0.321")	Active
DB106-BP	Micro Commercial Co	800	1.0	1.1 V @ 1 A	10 µA @ 800 V	-55 ~ 150	4-EDIP (0.321")	Active
DB105-BP	Micro Commercial Co	600	1.0	1.1 V @ 1 A	10 µA @ 600 V	-55 ~ 150	4-EDIP (0.321")	Active
DB104-BP	Micro Commercial Co	400	1.0	1.1 V @ 1 A	10 µA @ 400 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB103-BP	Micro Commercial Co	200	1.0	1.1 V @ 1 A	10 µA @ 200 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB102-BP	Micro Commercial Co	100	1.0	1.1 V @ 1 A	10 µA @ 100 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB101-BP	Micro Commercial Co	50	1.0	1.1 V @ 1 A	10 µA @ 50 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB107-BP	Micro Commercial Co	1000	1.0	1.1 V @ 1 A	10 µA @ 1000 V	-55 ~ 150	4-EDIP (0.321")	Active
DF005M	Fairchild Semiconductor	50	1.0	1.1 V @ 1 A	10 µA @ 50 V	-65 ~ 150	4-EDIP (0.300")	Active
DF06M	onsemi	600	1.5	1.1 V @ 1 A	5 µA @ 600 V	-55 ~ 150	4-EDIP (0.300")	Obsolete

Engineering Selection Recommendations

Primary Substitute: DB156-BP

DB156-BP is the recommended direct substitute for DF1508M. It matches the 800 V / 1.5 A electrical specification and maintains identical forward voltage and reverse leakage characteristics. The part is in active production status, ensuring long-term availability. Package dimensions differ slightly (0.321" vs. 0.300"), but both conform to 4-EDIP through-hole standards and are mechanically compatible with standard PCB layouts. DB156-BP is ROHS3 compliant and carries the same ECCN and HTSUS classifications.

Secondary Substitute: DB106-BP

DB106-BP provides 800 V rating with 1 A current capacity. This part is suitable for applications where the full 1.5 A rectified current is not required. It is in active production and ROHS3 compliant. The reduced current rating must be verified against circuit requirements before selection.

Voltage-Derating Alternatives: DB105-BP, DB107-BP

DB105-BP (600 V, 1 A) and DB107-BP (1000 V, 1 A) are available for applications with different voltage requirements. DB105-BP operates at reduced voltage; DB107-BP provides voltage margin above 800 V. Both are active production parts. Current rating is limited to 1 A.

Not Recommended for New Designs: DB101-BP, DB102-BP, DB103-BP, DB104-BP

These parts carry "Not For New Designs" status and should not be selected for new applications. Voltage ratings (50 V to 400 V) are insufficient for 800 V applications.

Obsolete Alternatives: DF06M

DF06M (onsemi, 600 V, 1.5 A) is obsolete and not recommended. Although it matches the 1.5 A current rating, the 600 V voltage rating is below the DF1508M specification.

Frequently Asked Questions (FAQ)

Q: Can DB106-BP replace DF1508M in all applications?

A: DB106-BP is electrically compatible at 800 V but is rated for 1 A instead of 1.5 A. It is suitable only if the circuit requires less than 1 A average rectified current. Verify circuit current requirements before substitution.

Q: What is the difference between the 0.300" and 0.321" package dimensions?

A: Both dimensions conform to 4-EDIP through-hole standards. The 0.321" package (DB156-BP, DB10x-BP series) is slightly wider than the 0.300" package (DF1508M, DF005M). Standard PCB layouts accommodate both dimensions without modification.

Q: Is DB156-BP a direct replacement for DF1508M?

A: Yes. DB156-BP matches the 800 V / 1.5 A electrical specification, forward voltage, reverse leakage, and operating temperature range. It is in active production and ROHS3 compliant. Package dimensions are compatible with standard through-hole footprints.

Q: Can I use DB105-BP (600 V) instead of DF1508M (800 V)?

A: No. DB105-BP is rated for 600 V peak reverse voltage, which is insufficient for 800 V applications. Using an under-rated part creates electrical safety risk and violates design specifications.

Q: Why are DB101-BP through DB104-BP marked "Not For New Designs"?

A: These parts have voltage ratings (50 V to 400 V) that do not meet the 800 V requirement of DF1508M. They are retained in the substitute list for reference only and should not be selected for new designs.

Q: What is the operating temperature difference between DF1508M and DB156-BP?

A: DF1508M operates from -65°C to 150°C; DB156-BP operates from -55°C to 150°C. The lower temperature limit of DB156-BP (-55°C vs. -65°C) may be a constraint in extreme cold environments. Verify application temperature requirements before substitution.

Q: Is DF005M suitable as a substitute?

A: No. DF005M is rated for 50 V peak reverse voltage, which is far below the 800 V requirement. It is not electrically compatible with DF1508M.

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