MB156 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB156 is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 600 V peak reverse voltage and 15 A average rectified current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The MB156 features QC terminal mounting and operates across a temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	15 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 7.5 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	QC Terminal
Package / Case	4-Square, MB
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitute parts for the MB156 are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Peak Reverse (Max): 600 V (exact match required)
Diode Type: Single Phase (exact match required)
Technology: Standard (exact match required)
Operating Temperature Range: Minimum -55°C to maximum 150°C or higher
Mounting Type: QC Terminal or Chassis Mount (both acceptable for circuit-level compatibility)
Package / Case: 4-Square form factor variants

Current Rating Consideration: Substitute parts may have equal or higher average rectified current ratings (15 A or greater) while maintaining all other electrical specifications. Higher current ratings provide design margin without compromising circuit function.

Parameter Comparison

Parameter	MB156 (Main)	GBPC1506	MB256-BP	MB356-BP
Manufacturer	Diodes Incorporated	Taiwan Semiconductor Corporation	Micro Commercial Co	Micro Commercial Co
Voltage - Peak Reverse (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	15 A	15 A	25 A	35 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 7.5 A	1.1 V @ 7.5 A	1.1 V @ 12.5 A	1.1 V @ 17.5 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V	5 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 125°C
Mounting Type	QC Terminal	Chassis Mount	QC Terminal	QC Terminal
Package / Case	4-Square, MB	4-Square, GBPC	4-Square, MB-35	4-Square, MB-35
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified

Engineering Selection Recommendations

GBPC1506 (Taiwan Semiconductor Corporation): This part provides a direct electrical equivalent with identical voltage and current ratings. It maintains ROHS3 compliance and the full operating temperature range of -55°C to 150°C. The primary difference is the Chassis Mount configuration versus QC Terminal mounting. This substitute is suitable for applications where mounting flexibility is acceptable.

MB256-BP (Micro Commercial Co): This part offers increased current capacity (25 A versus 15 A) while maintaining the 600 V voltage rating and QC Terminal mounting. The operating temperature range remains -55°C to 150°C. This substitute provides design margin for applications requiring higher current handling without circuit redesign.

MB356-BP (Micro Commercial Co): This part provides the highest current capacity (35 A) with 600 V voltage rating and QC Terminal mounting. The operating temperature range is -55°C to 125°C, which is acceptable for most applications but does not extend to the full -55°C to 150°C range of the original part. This substitute is appropriate for high-current applications where the reduced upper temperature limit does not conflict with system requirements.

All substitute parts are active products with established supply chains, addressing the obsolescence status of the MB156.

Frequently Asked Questions (FAQ)

Q: Can GBPC1506 replace MB156 in all applications? A: GBPC1506 matches all electrical specifications and operating temperature range. The difference is mounting type (Chassis Mount versus QC Terminal). Mechanical compatibility must be verified for your specific application.

Q: What is the advantage of MB256-BP over MB156? A: MB256-BP provides 25 A current capacity compared to MB156's 15 A, offering 67% additional current margin. Both maintain identical voltage ratings, forward voltage characteristics, and QC Terminal mounting.

Q: Is MB356-BP suitable for all MB156 applications? A: MB356-BP provides the highest current capacity (35 A) and maintains 600 V voltage rating with QC Terminal mounting. However, its maximum operating temperature is 125°C versus 150°C for MB156. Verify that your application does not require operation above 125°C.

Q: Are all substitute parts RoHS compliant? A: GBPC1506 is confirmed ROHS3 compliant. RoHS compliance status for MB256-BP and MB356-BP is not specified in available data.

Q: What is the difference between 4-Square MB and 4-Square GBPC packages? A: Both are 4-square form factors suitable for bridge rectifier applications. Physical dimensions may vary; verify mechanical compatibility with your PCB layout and mounting hardware.

Q: Can I use a higher-current substitute in a circuit designed for 15 A? A: Yes. Higher current-rated components (MB256-BP at 25 A or MB356-BP at 35 A) are electrically compatible and will function correctly in circuits designed for 15 A operation.

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