2KBP08M-E4/51 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The 2KBP08M-E4/51 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 800 V peak reverse voltage and 2 A average rectified current. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and procurement planning. The through-hole KBPM package design supports standard PCB integration in power supply and rectification applications.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max)	1.1 V @ 3.14 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V
Operating Temperature Range	-55°C ~ 165°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBPM
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 2KBP08M-E4/51 is determined by the following critical parameters:

Voltage - Peak Reverse (Max): Must equal 800 V
Diode Type: Must be Single Phase
Technology: Must be Standard
Current - Average Rectified (Io): Must support minimum 2 A
Mounting Type: Must be Through Hole
Package / Case: Must be compatible 4-SIP or equivalent form factor

The substitute parts identified below meet these core electrical and mechanical requirements. Current rating variations are acceptable when the substitute meets or exceeds the 2 A specification. Operating temperature range and forward voltage characteristics may vary within acceptable engineering tolerances for rectifier applications.

Parameter Comparison

Parameter	2KBP08M-E4/51 (Vishay)	KBP08G (Diodes Inc.)	KBP208G (SMC Diode)
Manufacturer	Vishay General Semiconductor	Diodes Incorporated	SMC Diode Solutions
Product Status	Obsolete	Active	Active
Diode Type	Single Phase	Single Phase	Single Phase
Voltage - Peak Reverse (Max)	800 V	800 V	800 V
Current - Average Rectified (Io)	2 A	1.5 A	2 A
Voltage - Forward (Vf) (Max)	1.1 V @ 3.14 A	1.1 V @ 1.5 A	1.1 V @ 2 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V
Operating Temperature Range	-55°C ~ 165°C	-65°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, KBPM	4-SIP, KBP	4-ESIP, KBP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

KBP208G (SMC Diode Solutions) is the primary substitute for the 2KBP08M-E4/51. This part maintains electrical equivalence with identical 800 V peak reverse voltage and 2 A average rectified current ratings. Both components share ROHS3 compliance and unlimited moisture sensitivity classification. The KBP208G is currently in active production status, ensuring long-term availability and supply chain stability. Package compatibility is maintained through the 4-ESIP form factor, which accommodates standard through-hole PCB layouts.

KBP08G (Diodes Incorporated) serves as a secondary substitute option. This part meets the 800 V voltage requirement and maintains identical reverse leakage characteristics. The current rating of 1.5 A is lower than the original 2 A specification; this part is suitable only for applications where the actual operating current does not exceed 1.5 A. The KBP08G is actively produced and ROHS3 compliant. Extended operating temperature range (-65°C to 150°C) provides additional thermal margin in cold-environment applications.

Both substitute parts carry ROHS3 compliance and unlimited moisture sensitivity ratings, matching the environmental and regulatory profile of the original component. Selection between KBP208G and KBP08G depends on application current requirements and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can KBP08G replace 2KBP08M-E4/51 in all applications?

A: KBP08G is suitable only for applications where the average rectified current does not exceed 1.5 A. The original 2KBP08M-E4/51 is rated for 2 A. If your application requires the full 2 A rating, use KBP208G instead.

Q: Are the package dimensions identical between these parts?

A: The 2KBP08M-E4/51 uses KBPM package, while KBP08G uses KBP package and KBP208G uses 4-ESIP package. All three are 4-pin through-hole configurations compatible with standard PCB layouts. Physical dimensions may vary slightly; verify against component datasheets for critical mechanical constraints.

Q: What is the difference between ROHS3 Compliant and REACH Affected status?

A: ROHS3 Compliant indicates the component meets Restriction of Hazardous Substances directive requirements. REACH Affected means the component contains substances of very high concern listed under REACH regulations. KBP208G carries REACH Affected status, while the original part and KBP08G are REACH Unaffected. Regulatory requirements vary by application and region; consult your compliance documentation.

Q: Why is the 2KBP08M-E4/51 marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts (KBP208G and KBP08G) are currently manufactured and available through authorized distributors, ensuring continued system support and component procurement.

Q: Can I use these parts interchangeably in existing designs?

A: KBP208G provides direct electrical and mechanical equivalence and can be used as a direct replacement. KBP08G requires current rating verification before use. All three parts share identical 800 V voltage rating, reverse leakage characteristics, and forward voltage specifications, supporting functional interchangeability within rated parameters.

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