UD4KB20-BP Bridge Rectifier Single Phase 200V 4A Equivalent & Substitute Parts

Part Overview

The UD4KB20-BP is a single-phase bridge rectifier manufactured by Micro Commercial Co, designed for 200V peak reverse voltage applications with 4A average rectified current capacity. This component features through-hole mounting in a 4-SIP package configuration and operates across the temperature range of -55°C to 150°C.

The UD4KB20-BP carries a "Not For New Designs" product status, indicating that this part is no longer recommended for new circuit development. This status necessitates identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering active product support and current manufacturing availability.

Substiute Parts

UD4KB20-BP

Micro Commercial CoIn Stock: 911UD4KB20-BP Datasheet

Current PartRFQ

KBP302G

SMC Diode SolutionsIn Stock: 1116KBP302G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UD4KB20-BP are identified based on strict electrical and mechanical parameter alignment. The substitution logic applies the following criteria:

Electrical Compatibility Requirements:

• Voltage - Peak Reverse (Max) must equal or exceed 200V
• Current - Average Rectified (Io) must equal or exceed 4A
• Operating Temperature Range must encompass -55°C to 150°C
• Diode Type must be Single Phase
• Technology must be Standard

Mechanical Compatibility Requirements:

• Mounting Type must be Through Hole
• Package configuration must be compatible with 4-SIP footprint specifications

Acceptable Variance:

• Forward voltage (Vf) may vary within standard silicon rectifier specifications
• Reverse leakage current may be lower than the original specification
• Package designations (4-SIP, 4-ESIP) are considered compatible when pin configuration and footprint dimensions align

The KBP302G meets the electrical requirements with equivalent 200V peak reverse voltage and -55°C to 150°C operating temperature range. However, the current rating of 3A is below the 4A specification of the UD4KB20-BP, placing this part in a limited substitution category for applications where the full 4A capacity is not required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Existing Designs:

The KBP302G serves as an electrical equivalent for applications where the circuit current requirement does not exceed 3A. The substitute maintains identical peak reverse voltage (200V) and operating temperature range (-55°C to 150°C), ensuring thermal and voltage stress compatibility. The KBP302G carries "Active" product status, providing ongoing manufacturing support and availability compared to the UD4KB20-BP's "Not For New Designs" classification.

Compliance and Certification Considerations:

The KBP302G holds RoHS3 compliance and REACH Affected status, indicating adherence to current environmental and hazardous substance regulations. The UD4KB20-BP is REACH Unaffected, reflecting its legacy product classification. Both parts share EAR99 ECCN classification and identical HTSUS code (8541.10.0080).

Package and Footprint Considerations:

The UD4KB20-BP uses 4-SIP packaging while the KBP302G uses 4-ESIP packaging. Both are through-hole configurations with four leads. PCB layout verification is required to confirm footprint compatibility, as package variant designations may indicate dimensional differences in lead spacing or body profile.

Current Rating Limitation:

The KBP302G current rating of 3A represents a 25% reduction from the UD4KB20-BP specification of 4A. This substitute is suitable only for applications where maximum rectified current does not exceed 3A under normal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the KBP302G directly replace the UD4KB20-BP in all applications?

A: The KBP302G is electrically compatible for voltage and temperature specifications but carries a lower current rating of 3A versus the original 4A. Direct replacement is valid only when circuit current requirements do not exceed 3A.

Q: What is the significance of the different package designations (4-SIP vs. 4-ESIP)?

A: Both designations indicate four-lead through-hole packages. The "E" in 4-ESIP typically denotes an enhanced or variant configuration. Physical footprint verification against PCB design files is necessary to confirm mechanical compatibility before substitution.

Q: Why is the UD4KB20-BP marked "Not For New Designs"?

A: This status indicates the part is in end-of-life phase and no longer recommended for new circuit development. Existing inventory may remain available, but long-term supply cannot be guaranteed. The KBP302G, with "Active" status, represents the current manufacturing alternative.

Q: How do the forward voltage specifications compare between these parts?

A: The UD4KB20-BP specifies 1V maximum forward drop at 2A, while the KBP302G specifies 1.1V at 3A. The slightly higher forward voltage in the substitute results in marginally increased heat dissipation but remains within acceptable silicon rectifier performance parameters.

Q: Are there any compliance differences between these parts?

A: The KBP302G is RoHS3 compliant and REACH Affected, reflecting current regulatory requirements. The UD4KB20-BP is REACH Unaffected, indicating legacy product status. Both share identical ECCN and HTSUS classifications.

Q: What does the reverse leakage current specification indicate?

A: The KBP302G exhibits lower reverse leakage (5µA @ 200V) compared to the UD4KB20-BP (10µA @ 200V). Lower leakage current indicates superior reverse blocking characteristics and reduced standby current draw in the circuit.