DF08M Bridge Rectifier Single Phase 800V 1.5A Equivalent & Substitute Parts

Part Overview

The DF08M is a single-phase bridge rectifier diode manufactured by onsemi, rated for 800 V peak reverse voltage and 1.5 A average rectified current in a 4-DIP through-hole package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing component sourcing and design continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Key Parameters

Parameter	DF08M Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-EDIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Substitution Criteria:

Diode Type: Must be Single Phase
Technology: Must be Standard
Voltage - Peak Reverse (Max): Must be ≥ 800 V
Current - Average Rectified (Io): Must be ≥ 1.5 A
Mounting Type: Must be Through Hole
Operating Temperature Range: Must encompass or match -55°C ~ 150°C

Secondary Considerations:

Package mechanical compatibility (4-EDIP form factor with similar pin spacing)
Forward voltage characteristics at rated current
Reverse leakage current specifications
RoHS and REACH compliance status

Parts are grouped by voltage rating and current capacity. Parts meeting or exceeding the DF08M electrical specifications are classified as direct substitutes. Parts with lower voltage or current ratings are listed for reference but do not qualify as functional equivalents for the DF08M application.

Parameter Comparison

Part Number	Manufacturer	Voltage (V)	Current (A)	Vf @ If (V)	Ir @ Vr (µA)	Temp Range (°C)	Package	Status
DF08M	onsemi	800	1.5	1.1 @ 1 A	5 @ 800 V	-55 ~ 150	4-EDIP (0.300")	Obsolete
DB156-BP	SMC Diode Solutions	800	1.5	1.1 @ 1.5 A	5 @ 800 V	-55 ~ 150	4-EDIP (0.321")	Active
DF06M	onsemi	600	1.5	1.1 @ 1 A	5 @ 600 V	-55 ~ 150	4-EDIP (0.300")	Obsolete
DB105-BP	Micro Commercial Co	600	1.0	1.1 @ 1 A	10 @ 600 V	-55 ~ 150	4-EDIP (0.321")	Active
DB106-BP	Micro Commercial Co	800	1.0	1.1 @ 1 A	10 @ 800 V	-55 ~ 150	4-EDIP (0.321")	Active
DB104-BP	Micro Commercial Co	400	1.0	1.1 @ 1 A	10 @ 400 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB103-BP	Micro Commercial Co	200	1.0	1.1 @ 1 A	10 @ 200 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB102-BP	Micro Commercial Co	100	1.0	1.1 @ 1 A	10 @ 100 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DB101-BP	Micro Commercial Co	50	1.0	1.1 @ 1 A	10 @ 50 V	-55 ~ 150	4-EDIP (0.321")	Not For New Designs
DF005M	Fairchild Semiconductor	50	1.0	1.1 @ 1 A	10 @ 50 V	-65 ~ 150	4-EDIP (0.300")	Active
DB107-BP	Micro Commercial Co	1000	1.0	1.1 @ 1 A	10 @ 1000 V	-55 ~ 150	4-EDIP (0.321")	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

DB156-BP is the only substitute part that meets all electrical specifications of the DF08M. It provides 800 V peak reverse voltage and 1.5 A average rectified current with identical forward voltage characteristics. The part is manufactured by SMC Diode Solutions and carries Active product status, ensuring long-term availability. Package dimensions differ slightly (0.321" vs. 0.300" pin spacing), requiring PCB layout verification. DB156-BP is ROHS3 compliant and REACH Affected.

Voltage-Rated Alternatives (Lower Current Capacity):

DB106-BP (Micro Commercial Co, 800 V, 1.0 A, Active) provides equivalent voltage rating but reduced current capacity to 1.0 A. This part is suitable only for applications where the 1.5 A specification can be reduced without functional impact. DB106-BP is ROHS3 compliant with unlimited MSL rating.

Lower Voltage Alternatives (Not Recommended for Direct Replacement):

DB105-BP (600 V, 1.0 A, Active) and DF06M (600 V, 1.5 A, Obsolete) are rated for 600 V maximum, which is below the DF08M 800 V specification. These parts are suitable only for applications with reduced voltage requirements. DB105-BP is manufactured by Micro Commercial Co and carries Active status.

Parts with voltage ratings below 600 V (DB104-BP, DB103-BP, DB102-BP, DB101-BP) and DF005M (50 V) do not meet the DF08M voltage specification and are not suitable substitutes for 800 V applications.

Product Status Considerations:

DF08M is classified as Obsolete. DB156-BP (Active) is the recommended substitute for new designs and ongoing production. DB106-BP and DB105-BP (both Active) provide alternative options with reduced current or voltage ratings. Parts marked "Not For New Designs" (DB104-BP, DB103-BP, DB102-BP, DB101-BP) should not be selected for new applications.

Frequently Asked Questions (FAQ)

Q: Can DB106-BP replace DF08M in all applications?

A: DB106-BP meets the 800 V voltage specification but is rated for 1.0 A average rectified current versus the DF08M 1.5 A rating. Substitution is valid only if the application current requirement does not exceed 1.0 A. Verify circuit current draw before selection.

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

A: Both parts use 4-EDIP (4-pin DIP) form factor, but pin spacing differs slightly. The 0.300" pitch (DF08M) and 0.321" pitch (DB156-BP) require different PCB hole patterns. Mechanical compatibility must be verified during layout design. DB156-BP may require PCB modification or adapter consideration.

Q: Is DB156-BP fully compatible with DF08M?

A: DB156-BP matches all electrical specifications (800 V, 1.5 A, -55°C to 150°C operating range, 1.1 V forward voltage). Package pin spacing differs, requiring PCB layout verification. DB156-BP is ROHS3 compliant and carries Active product status, supporting long-term availability.

Q: Why are lower voltage parts listed if they cannot replace DF08M?

A: Lower voltage parts (DB105-BP, DB104-BP, DB103-BP, DB102-BP, DB101-BP, DF005M) are included for reference in applications where voltage requirements are reduced or for design flexibility. These parts do not qualify as direct substitutes for 800 V circuits.

Q: What compliance certifications apply to substitute parts?

A: DB156-BP is ROHS3 compliant and REACH Affected. DB106-BP and DB105-BP are ROHS3 compliant with REACH Unaffected status. All parts carry EAR99 ECCN classification and HTSUS code 8541.10.0080. Verify compliance requirements for your specific application and region.

Q: Can DF005M be used as a substitute?

A: DF005M is rated for 50 V maximum, which is significantly below the DF08M 800 V specification. It is not suitable for 800 V applications. DF005M is appropriate only for low-voltage circuits (≤50 V).

Q: What is the reverse leakage current difference between DF08M and DB156-BP?

A: Both parts specify 5 µA reverse leakage at their respective voltage ratings (800 V). This parameter is identical, indicating equivalent reverse bias performance.

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