PB81-BP Bridge Rectifier Single Phase Standard 100 V Through Hole

Part Overview

The PB81-BP is a single-phase bridge rectifier diode manufactured by Micro Commercial Co, designed for interface applications requiring 100 V peak reverse voltage rating with 8 A average rectified current capacity. This component features a through-hole mounting configuration in a 4-Square PB-10 package.

The PB81-BP is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and production requirements for legacy systems utilizing this component. The substitute part PB810-BP provides functional compatibility while offering active product status and enhanced voltage rating.

Substiute Parts

PB81-BP

Micro Commercial CoIn Stock: 859PB81-BP Datasheet

Current PartRFQ

PB810-BP

Micro Commercial CoIn Stock: 798PB810-BP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the PB81-BP is determined by the following critical parameters:

Mechanical Compatibility:

• Mounting Type: Through Hole
• Package / Case: 4-Square, PB-10

Electrical Compatibility:

• Diode Type: Single Phase
• Technology: Standard
• Current - Average Rectified (Io): 8 A (minimum requirement)
• Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 4 A (maximum allowable)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

Substitution Logic: The PB810-BP qualifies as a substitute because it maintains identical mechanical packaging, identical single-phase diode type, identical standard technology classification, and identical thermal operating range. The electrical parameters of the PB810-BP meet or exceed the requirements of the PB81-BP: forward voltage remains at 1.1 V @ 4 A, average rectified current capacity is maintained at 8 A, and reverse leakage characteristics are preserved at the rated voltage. The PB810-BP features an enhanced peak reverse voltage rating of 1 kV, which exceeds the 100 V requirement of the original part, providing additional design margin without compromising compatibility in applications rated for 100 V operation.

Parameter Comparison

Engineering Selection Recommendations

The PB810-BP is the manufacturer-recommended substitute for the obsolete PB81-BP. Selection of the PB810-BP is supported by the following factors:

Product Status: The PB810-BP maintains active product status with Micro Commercial Co, ensuring continued availability and supply chain reliability. The PB81-BP is classified as obsolete, limiting future procurement options.

Regulatory Compliance: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring equivalent compliance posture for export and regulatory requirements.

Electrical Performance: The PB810-BP delivers identical electrical performance within the 100 V operating envelope of the original design. The enhanced 1 kV peak reverse voltage rating of the PB810-BP provides additional design margin and does not introduce incompatibility in circuits designed for 100 V operation.

Mechanical Compatibility: Identical through-hole mounting configuration and 4-Square PB-10 package ensure direct physical substitution without PCB redesign or mechanical rework.

Thermal Characteristics: Identical operating temperature range (-55°C ~ 125°C) maintains thermal performance equivalence across all operating conditions.

Frequently Asked Questions (FAQ)

Q: Can the PB810-BP be used as a direct replacement for the PB81-BP in existing designs?

A: Yes. The PB810-BP is mechanically and electrically compatible with the PB81-BP. Both components feature identical through-hole mounting in the 4-Square PB-10 package, identical single-phase diode configuration, and identical electrical performance within the 100 V operating range. No circuit modifications or PCB redesign is required.

Q: What is the significance of the higher 1 kV voltage rating on the PB810-BP?

A: The PB810-BP features a peak reverse voltage rating of 1 kV compared to the 100 V rating of the PB81-BP. In applications designed for 100 V operation, this higher rating provides additional design margin and reverse voltage protection without affecting forward conduction characteristics or current capacity. The substitute part remains fully compatible with circuits rated for 100 V.

Q: Are the forward voltage and current characteristics identical between the two parts?

A: Yes. Both the PB81-BP and PB810-BP specify identical forward voltage of 1.1 V maximum at 4 A forward current and identical average rectified current capacity of 8 A. Forward conduction behavior is equivalent.

Q: Do both parts meet the same regulatory and compliance requirements?

A: Yes. Both the PB81-BP and PB810-BP maintain identical REACH status (REACH Unaffected) and ECCN classification (EAR99), ensuring equivalent compliance for export, environmental, and regulatory purposes.

Q: Why is the PB810-BP recommended over the PB81-BP?

A: The PB810-BP is recommended because it maintains active product status with the manufacturer, ensuring reliable long-term availability and supply chain support. The PB81-BP is classified as obsolete, which limits future procurement options and may result in extended lead times or unavailability. The PB810-BP provides equivalent functionality with superior product lifecycle status.

Q: Are there any thermal performance differences between the two parts?

A: No. Both parts specify identical operating temperature range of -55°C ~ 125°C, ensuring equivalent thermal performance and reliability across all operating conditions.

Q: Can the PB810-BP be used in high-voltage applications exceeding 100 V?

A: The PB810-BP is rated for peak reverse voltage up to 1 kV and can be used in applications requiring higher voltage ratings. However, this engineering reference addresses substitution for the PB81-BP, which is specified for 100 V operation. Application of the PB810-BP in higher-voltage circuits requires independent circuit design verification.