MB156W Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB156W 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 identification of equivalent and substitute parts essential for ongoing system support and new design alternatives.

Bridge rectifiers in this voltage and current class are used in AC-to-DC conversion applications requiring robust through-hole mounting and standard silicon technology. The obsolete status of the MB156W necessitates evaluation of active alternatives that maintain electrical and mechanical compatibility.

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	Through Hole
Package / Case	4-Square, MB-W
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitution eligibility for the MB156W is determined by the following critical parameters:

Voltage - Peak Reverse (Max): Must equal or exceed 600 V
Current - Average Rectified (Io): Must equal or exceed 15 A
Diode Type: Must be Single Phase
Mounting Type: Must be Through Hole
Package / Case: Must be compatible 4-Square configuration

Based on these criteria, the GBPC1506W-E4/51 qualifies as a direct electrical and mechanical substitute. The MB251W-BP does not meet substitution requirements due to insufficient peak reverse voltage (100 V vs. 600 V required) and reduced operating temperature range (-55°C ~ 125°C vs. -55°C ~ 150°C).

Parameter Comparison

Parameter	MB156W (Main Part)	GBPC1506W-E4/51 (Direct Substitute)	MB251W-BP (Reference Only)
Manufacturer	Diodes Incorporated	Vishay General Semiconductor - Diodes Division	Micro Commercial Co
Product Status	Obsolete	Active	Not For New Designs
Voltage - Peak Reverse (Max)	600 V	600 V	100 V
Current - Average Rectified (Io)	15 A	15 A	25 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 7.5 A	1.1 V @ 7.5 A	1.2 V @ 12.5 A
Current - Reverse Leakage @ Vr	10 µA @ 600 V	5 µA @ 600 V	10 µA @ 100 V
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	4-Square, MB-W	4-Square, GBPC-W	4-Square, MB-35W
Diode Type	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Affected	REACH Affected	REACH Unaffected

Engineering Selection Recommendations

The GBPC1506W-E4/51 manufactured by Vishay General Semiconductor - Diodes Division is the qualified direct substitute for the obsolete MB156W. This part maintains identical electrical specifications across all critical parameters: 600 V peak reverse voltage, 15 A average rectified current, 1.1 V forward voltage at 7.5 A, and -55°C to 150°C operating temperature range. The GBPC1506W-E4/51 holds active product status and carries ROHS3 compliance and REACH Affected designation, matching the regulatory profile of the original part.

The MB251W-BP, while listed as a manufacturer-recommended alternative, does not qualify as a substitute due to insufficient peak reverse voltage specification (100 V maximum versus 600 V requirement) and reduced maximum operating temperature (125°C versus 150°C). This part is suitable only for applications with lower voltage requirements and is classified as not for new designs.

For applications currently using MB156W, transition to GBPC1506W-E4/51 maintains full electrical and thermal performance. Through-hole mounting compatibility and identical package configuration ensure direct board-level replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can GBPC1506W-E4/51 directly replace MB156W in existing designs?

A: Yes. The GBPC1506W-E4/51 meets all electrical and mechanical requirements for direct substitution. Peak reverse voltage, average rectified current, forward voltage characteristics, and operating temperature range are identical. Through-hole mounting and 4-square package configuration are compatible.

Q: Why is MB251W-BP not suitable as a substitute?

A: The MB251W-BP operates at maximum 100 V peak reverse voltage, insufficient for applications requiring 600 V rating. Additionally, its maximum operating temperature of 125°C is below the MB156W specification of 150°C. This part is classified as not for new designs and does not meet substitution criteria.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by peak reverse voltage (must be ≥600 V), average rectified current (must be ≥15 A), diode type (single phase), mounting type (through hole), and package configuration (4-square). Forward voltage and reverse leakage characteristics must also remain within acceptable ranges for the application.

Q: Are there compliance differences between MB156W and GBPC1506W-E4/51?

A: Both parts are ROHS3 compliant, REACH Affected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Regulatory and environmental compliance profiles are equivalent.

Q: What is the difference in reverse leakage current between the main part and substitute?

A: The GBPC1506W-E4/51 exhibits 5 µA reverse leakage at 600 V, compared to 10 µA for the MB156W. Lower reverse leakage in the substitute represents improved performance characteristics and does not affect compatibility.

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