BR31 Bridge Rectifier Single Phase 100V 3A Equivalent & Substitute Parts

Part Overview

The BR31 is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 100 V peak reverse voltage and 3 A average rectified current. This component is designed for through-hole mounting in standard 4-Square BR-3 package configuration and operates across the temperature range of -65°C to 125°C. The BR31 maintains Active product status and is RoHS Compliant, making it suitable for new design implementations.

Substitute parts become necessary when the primary component experiences inventory constraints, extended lead times, or when design requirements permit operation with alternative electrical or thermal characteristics within the same functional category.

Substiute Parts

BR31

GeneSiC SemiconductorIn Stock: 1017BR31 Datasheet

Current PartRFQ

PB61-BP

Micro Commercial CoIn Stock: 2218PB61-BP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BR31 is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain the same peak reverse voltage rating of 100 V to ensure equivalent circuit protection and voltage handling capability.

Current Rating Consideration: While the BR31 is rated for 3 A average rectified current, substitute parts with equal or higher current ratings (such as 6 A) are electrically compatible, as they can safely handle the specified current without exceeding design limits.

Forward Voltage Characteristics: Forward voltage drop (Vf) at specified current levels must be within acceptable ranges for the application. Variations in Vf affect power dissipation and thermal performance but do not prevent functional substitution.

Reverse Leakage Current: The reverse leakage specification of 10 µA @ 100 V establishes the leakage performance baseline. Substitute parts meeting or exceeding this specification maintain equivalent blocking characteristics.

Mounting and Package Configuration: Through-hole mounting type and 4-Square package family ensure mechanical and electrical interface compatibility with existing PCB designs.

Temperature Operating Range: The BR31 operates from -65°C to 125°C. Substitute parts with equal or extended temperature ranges maintain thermal compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Active Design Programs: The BR31 is the primary selection due to its Active product status. This designation ensures continued manufacturer support, availability, and suitability for new design implementations.

For Substitute Selection: The PB61-BP from Micro Commercial Co meets the electrical requirements for substitution based on voltage rating, current capacity, and leakage specifications. However, the PB61-BP carries a "Not For New Designs" status, indicating that Micro Commercial Co does not recommend this part for new development. This status does not prevent its use as a substitute in existing designs or applications where inventory or lead-time constraints necessitate an alternative.

Compliance Considerations: Both parts maintain RoHS compliance (BR31: RoHS Compliant; PB61-BP: ROHS3 Compliant) and unlimited moisture sensitivity levels, ensuring environmental and regulatory compatibility. The PB61-BP includes REACH Unaffected status, providing additional regulatory clarity for European applications.

Temperature Range: The PB61-BP offers an extended upper operating temperature limit of 150°C compared to the BR31's 125°C. This characteristic may provide thermal margin in applications approaching the BR31's temperature ceiling, though the BR31's lower minimum temperature of -65°C (versus -55°C for PB61-BP) should be verified for cold-environment applications.

Frequently Asked Questions (FAQ)

Q: Can the PB61-BP directly replace the BR31 in an existing circuit?

A: Yes, from an electrical standpoint. Both parts share identical peak reverse voltage (100 V) and reverse leakage current (10 µA @ 100 V) specifications. The PB61-BP's higher current rating (6 A versus 3 A) and extended temperature range do not create incompatibility. However, verify that the PCB layout accommodates the PB-6 package dimensions if they differ from BR-3.

Q: What is the significance of the "Not For New Designs" status on the PB61-BP?

A: This designation indicates that Micro Commercial Co does not recommend the PB61-BP for new product development. It does not imply technical deficiency but rather reflects the manufacturer's product lifecycle strategy. The part remains electrically and mechanically functional as a substitute in existing applications.

Q: Are there differences in forward voltage drop between these parts?

A: Yes. The BR31 specifies 1 V maximum forward voltage at 1.5 A, while the PB61-BP specifies 1.1 V maximum at 3 A. This 0.1 V difference affects power dissipation calculations. In a 3 A application, the PB61-BP will dissipate approximately 0.33 W more than the BR31 (assuming 3 A operation). Verify thermal design margins if substituting in thermally constrained applications.

Q: Do the different package designations (BR-3 versus PB-6) affect compatibility?

A: Both packages belong to the 4-Square through-hole family and share the same electrical interface. Physical dimensions may differ; verify PCB footprint compatibility before substitution. Consult the respective datasheets for precise lead spacing and mounting hole specifications.

Q: Which part should be selected for a new design?

A: The BR31 is the appropriate choice for new designs due to its Active product status. The PB61-BP should be reserved for substitute applications where the BR31 is unavailable or where extended temperature performance is specifically required.

Q: Are both parts RoHS compliant?

A: Yes. The BR31 is RoHS Compliant, and the PB61-BP is ROHS3 Compliant. Both meet current environmental regulations. The PB61-BP's REACH Unaffected status provides additional regulatory documentation for European markets.