DF08M/45 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF08M/45 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V peak reverse voltage and 1 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part is housed in a 4-EDIP (0.300", 7.62mm) through-hole package and complies with ROHS3 and REACH standards.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	1 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)
Diode Type	Single Phase
Technology	Standard
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DF08M/45 is determined by the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Peak Reverse (Max): 800 V minimum
Current - Average Rectified (Io): 1 A minimum
Diode Type: Single Phase
Technology: Standard
Mounting Type: Through Hole
Operating Temperature Range: -55°C to 150°C minimum

Package Compatibility:

Primary package: 4-EDIP (0.300", 7.62mm)
Alternative package: 4-EDIP (0.321", 8.15mm) with mechanical verification

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected

Substitute parts are grouped into two categories: direct equivalents with identical electrical specifications and active-status alternatives that meet or exceed the electrical requirements of the DF08M/45.

Parameter Comparison

Part Number	Manufacturer	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Vf (Max) @ If	Reverse Leakage @ Vr	Operating Temperature	Package / Case	Product Status	RoHS Status
DF08M/45	Vishay General Semiconductor	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Obsolete	ROHS3 Compliant
DF08M-E3/45	Vishay General Semiconductor	800 V	1 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Active	ROHS3 Compliant
DF08M	onsemi	800 V	1.5 A	1.1 V @ 1 A	5 µA @ 800 V	-55°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Obsolete	ROHS3 Compliant
DB106-BP	Micro Commercial Co	800 V	1 A	1.1 V @ 1 A	10 µA @ 800 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DB105-BP	Micro Commercial Co	600 V	1 A	1.1 V @ 1 A	10 µA @ 600 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DB104-BP	Micro Commercial Co	400 V	1 A	1.1 V @ 1 A	10 µA @ 400 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Not For New Designs	ROHS3 Compliant
DB107-BP	Micro Commercial Co	1 kV	1 A	1.1 V @ 1 A	10 µA @ 1000 V	-55°C ~ 150°C	4-EDIP (0.321", 8.15mm)	Active	ROHS3 Compliant
DF005M	Fairchild Semiconductor	50 V	1 A	1.1 V @ 1 A	10 µA @ 50 V	-65°C ~ 150°C	4-EDIP (0.300", 7.62mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitute: DF08M-E3/45 (Vishay General Semiconductor) is the direct equivalent to DF08M/45. This part maintains identical electrical specifications, package dimensions, and compliance certifications while offering active product status and higher inventory availability (3870 pcs vs. 807 pcs).

Alternative Substitutes for 800 V / 1 A Applications: DB106-BP (Micro Commercial Co) meets the 800 V / 1 A electrical requirements with active product status. The package footprint differs slightly (0.321" vs. 0.300"), requiring mechanical verification for PCB compatibility. This part is actively manufactured with substantial inventory (5744 pcs).

Higher Voltage Alternative: DB107-BP (Micro Commercial Co) provides 1 kV peak reverse voltage rating with 1 A current capacity. This part is suitable for applications requiring voltage margin above 800 V and is actively produced.

Lower Voltage Alternatives: DB105-BP (600 V / 1 A) and DB104-BP (400 V / 1 A) are suitable only for applications where the circuit voltage requirement does not exceed their respective ratings. DB105-BP is actively manufactured; DB104-BP is marked "Not For New Designs."

Not Recommended: DF005M (50 V rating) is unsuitable for 800 V applications and should not be selected for this substitution requirement.

Frequently Asked Questions (FAQ)

Q: Can DF08M-E3/45 be used as a direct replacement for DF08M/45? A: Yes. DF08M-E3/45 is electrically and mechanically identical to DF08M/45, with the same 800 V peak reverse voltage, 1 A average rectified current, forward voltage characteristics, and 4-EDIP (0.300", 7.62mm) package. The primary difference is product status (Active vs. Obsolete) and packaging format (Tube vs. standard).

Q: What is the difference between the Vishay DF08M-E3/45 and the onsemi DF08M? A: Both parts share the same part number designation but differ in manufacturer. The onsemi DF08M has a higher current rating (1.5 A vs. 1 A) and identical voltage specifications. Both are obsolete. The Vishay DF08M-E3/45 is the recommended active substitute.

Q: Can DB106-BP replace DF08M/45 in all applications? A: DB106-BP meets the electrical requirements (800 V / 1 A) but has a different package footprint (4-EDIP 0.321" vs. 0.300"). Mechanical verification is required to confirm PCB hole spacing compatibility before substitution.

Q: Why is DB105-BP not recommended as a substitute? A: DB105-BP is rated for 600 V peak reverse voltage, which is below the 800 V requirement of DF08M/45. This part is suitable only for applications with maximum circuit voltages not exceeding 600 V.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed meet ROHS3 Compliant and REACH Unaffected standards, matching the compliance profile of DF08M/45.

Q: What is the operating temperature range for substitute parts? A: All substitute parts operate within -55°C to 150°C (TJ), with the exception of DF005M, which extends to -65°C minimum. This matches or exceeds the DF08M/45 specification.

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