PB305-BP Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The PB305-BP is a single-phase bridge rectifier manufactured by Micro Commercial Co, rated for 50 V peak reverse voltage and 3 A average rectified current in a through-hole PB-3 package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C and meets ROHS3 compliance requirements.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	50 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A
Current - Reverse Leakage @ Vr	10 µA @ 50 V
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	4-Square, PB-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PB305-BP is determined by matching the following critical parameters:

Diode Type: Single Phase bridge rectifier configuration
Voltage Rating: Peak reverse voltage of 50 V (minimum requirement)
Current Rating: Average rectified current of 3 A (minimum requirement)
Mounting Type: Through-hole technology for PCB integration
Package Compatibility: 4-Square package form factor
Forward Voltage Characteristics: Maximum forward voltage drop at rated current
Reverse Leakage: Maximum reverse leakage current specification
Temperature Range: Operating temperature compatibility

The BR305 manufactured by JATTA meets all substitution criteria, maintaining electrical equivalence across voltage, current, and thermal specifications while providing active product status and improved temperature range coverage.

Parameter Comparison

Parameter	PB305-BP (Micro Commercial Co)	BR305 (JATTA)	Match Status
Diode Type	Single Phase	Single Phase	Equivalent
Technology	Standard	Standard	Equivalent
Voltage - Peak Reverse (Max)	50 V	50 V	Equivalent
Current - Average Rectified (Io)	3 A	3.0 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A	1 V @ 1.5 A	BR305 Superior
Current - Reverse Leakage @ Vr	10 µA @ 50 V	10 µA @ 50 V	Equivalent
Operating Temperature Range	-55°C ~ 125°C	-65°C ~ 125°C (TJ)	BR305 Extended
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	4-Square, PB-3	4-Square, BR-3	Compatible
Product Status	Obsolete	Active	BR305 Current
RoHS Compliance	ROHS3 Compliant	Not Specified	PB305-BP Specified

Engineering Selection Recommendations

The BR305 from JATTA is a direct functional equivalent for the obsolete PB305-BP. Both components share identical electrical ratings for voltage, current, and reverse leakage specifications. The BR305 offers operational advantages including active product status, extended lower temperature operating limit (-65°C versus -55°C), and reduced forward voltage drop (1 V versus 1.2 V at rated current).

For applications requiring ROHS3 compliance documentation, the PB305-BP specification should be verified against procurement requirements. The BR305 maintains through-hole mounting compatibility and 4-Square package form factor, enabling direct PCB layout substitution without redesign.

Frequently Asked Questions (FAQ)

Q: Can BR305 replace PB305-BP in existing designs? A: Yes. Both components meet identical voltage (50 V), current (3 A), and reverse leakage (10 µA @ 50 V) specifications. Through-hole mounting and 4-Square package compatibility enable direct substitution without circuit modification.

Q: What is the difference between PB-3 and BR-3 packages? A: Both are 4-Square through-hole packages for single-phase bridge rectifiers. The designations reflect manufacturer-specific package naming conventions. Physical dimensions and PCB footprints are compatible for substitution purposes.

Q: Does the lower forward voltage of BR305 affect circuit operation? A: The BR305 forward voltage (1 V @ 1.5 A) is lower than PB305-BP (1.2 V @ 1.5 A). This results in reduced power dissipation and heat generation, which is beneficial for thermal management. No circuit redesign is required.

Q: Is the extended temperature range of BR305 significant? A: The BR305 operating range extends to -65°C (versus -55°C minimum for PB305-BP). This provides additional margin for applications operating in cold environments. Standard applications at -55°C to 125°C are fully supported by both components.

Q: What is the product status impact? A: PB305-BP is obsolete, indicating discontinued manufacturing and limited future availability. BR305 is active, ensuring ongoing supply and manufacturing support. For new designs or long-term procurement, BR305 is the recommended selection.

Q: Are there compliance differences between the parts? A: PB305-BP carries ROHS3 compliance certification. BR305 compliance status is not specified in available documentation. Procurement requirements for specific regulatory certifications should be verified before final component selection.

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