DF208-G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The DF208-G is a single-phase bridge rectifier manufactured by Comchip Technology, rated for 800 V peak reverse voltage with 2 A average rectified current. This component is actively produced and widely used in power supply and rectification applications requiring through-hole mounting. Substitute parts become necessary when the primary part is unavailable, when inventory constraints exist, or when design flexibility allows for compatible alternatives meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max)	1.1 V @ 2 A
Current - Reverse Leakage @ Vr	10 µA @ 800 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 DF208-G is determined by the following criteria:

Primary Substitution Parameters:

Voltage - Peak Reverse (Max): Must equal or exceed 800 V
Diode Type: Must be Single Phase
Technology: Must be Standard
Mounting Type: Must be Through Hole
Operating Temperature Range: Must encompass -55°C ~ 150°C

Secondary Compatibility Parameters:

Current - Average Rectified (Io): Substitute must meet or exceed 2 A
Package / Case: Must be mechanically compatible with 4-EDIP footprint
Voltage - Forward (Vf): Must not exceed 1.1 V @ rated current

The substitute parts DB106-BP and DF08M meet the primary electrical requirements but differ in current ratings and specific package dimensions, requiring engineering evaluation for application fit.

Parameter Comparison

Parameter	DF208-G (Main)	DB106-BP	DF08M
Manufacturer	Comchip Technology	Micro Commercial Co	onsemi
Voltage - Peak Reverse (Max)	800 V	800 V	800 V
Current - Average Rectified (Io)	2 A	1 A	1.5 A
Voltage - Forward (Vf) (Max)	1.1 V @ 2 A	1.1 V @ 1 A	1.1 V @ 1 A
Current - Reverse Leakage @ Vr	10 µA @ 800 V	10 µA @ 800 V	5 µA @ 800 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	4-EDIP (0.321", 8.15mm)	4-EDIP (0.321", 8.15mm)	4-EDIP (0.300", 7.62mm)
Diode Type	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard
Product Status	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

DB106-BP (Micro Commercial Co): This substitute shares identical voltage ratings, forward voltage characteristics, and package footprint with the DF208-G. The primary difference is a reduced current rating of 1 A versus 2 A. Selection of DB106-BP is appropriate only for applications where the circuit current demand does not exceed 1 A. Both parts maintain Active product status and full ROHS3 compliance.

DF08M (onsemi): This substitute meets the 800 V voltage requirement and provides 1.5 A current capacity, positioning it between the main part and DB106-BP in current handling. However, DF08M carries Obsolete product status, indicating discontinued manufacturing. The package dimensions differ slightly (0.300" versus 0.321"), requiring verification of PCB footprint compatibility. DF08M maintains ROHS3 and REACH compliance but should be selected only when current inventory is available and long-term supply is not a requirement.

Frequently Asked Questions (FAQ)

Q: Can DB106-BP directly replace DF208-G in all applications? DB106-BP is electrically compatible at 800 V peak reverse voltage and shares the same package footprint. However, its 1 A current rating is half that of DF208-G. Direct replacement is valid only if the application circuit operates at or below 1 A average rectified current.

Q: Why is DF08M listed as a substitute if it is obsolete? DF08M meets the core electrical parameters (800 V, 1.5 A, Standard technology, Single Phase) and remains in inventory. It serves as a substitute option for existing designs or applications where current stock is available. New designs should prioritize active parts such as DF208-G or DB106-BP.

Q: Are there package compatibility concerns between these parts? DF208-G and DB106-BP both use 4-EDIP packages with identical 0.321" (8.15mm) dimensions and are mechanically interchangeable on standard PCB layouts. DF08M uses a slightly smaller 4-EDIP package (0.300", 7.62mm) and requires PCB footprint verification before substitution.

Q: What compliance certifications apply to all three parts? All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards for electronic components.

Q: How do reverse leakage currents compare? DF208-G and DB106-BP both specify 10 µA @ 800 V reverse leakage. DF08M specifies 5 µA @ 800 V, indicating lower leakage characteristics. This difference is not a limiting factor for substitution but may be relevant for high-impedance or precision applications.

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