MB356 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The MB356 is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 600 V peak reverse voltage and 35 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 MB356 features QC terminal mounting and operates across a temperature range of -55°C to 150°C. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating different mounting and packaging configurations.

Key Parameters

Parameter	Value
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	35 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 17.5 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
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: peak reverse voltage rating (600 V minimum), average rectified current capacity (35 A minimum for direct substitution, 25 A for downrated applications), diode type (single phase), and technology classification (standard). All substitute parts must maintain ROHS3 compliance and operate within the specified temperature range.

The substitute parts are grouped as follows:

Direct Current Rating Equivalents (35 A): Parts maintaining the full 35 A current specification with 600 V voltage rating. These include GBPC3506 (Taiwan Semiconductor Corporation, chassis mount configuration) and MB356-BP (Micro Commercial Co, QC terminal configuration). Both support identical current and voltage parameters with minor variations in forward voltage characteristics.

Downrated Current Substitute (25 A): MB256-BP (Micro Commercial Co) operates at 25 A average rectified current, representing a reduced current capacity variant. This part is suitable for applications where the full 35 A rating is not required, provided system design accommodates the lower current specification.

Parameter Comparison

Parameter	MB356 (Main)	GBPC3506	MB356-BP	MB256-BP
Manufacturer	Diodes Incorporated	Taiwan Semiconductor Corporation	Micro Commercial Co	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard
Voltage - Peak Reverse (Max)	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	35 A	35 A	35 A	25 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 17.5 A	1.1 V @ 17.5 A	1.1 V @ 17.5 A	1.1 V @ 12.5 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 ~ 125°C	-55°C ~ 150°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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified

Engineering Selection Recommendations

For Direct Replacement (35 A Applications): MB356-BP is the primary substitute, maintaining QC terminal mounting identical to the original MB356 and supporting the full 35 A current specification. This part is manufactured by Micro Commercial Co and carries active product status with bulk packaging availability.

For Alternative Mounting Configuration: GBPC3506 provides equivalent electrical performance at 35 A and 600 V but requires chassis mount integration instead of QC terminal connection. This part is manufactured by Taiwan Semiconductor Corporation with active product status. Forward voltage is marginally lower (1.1 V vs. 1.2 V), resulting in reduced power dissipation.

For Reduced Current Applications: MB256-BP operates at 25 A average rectified current and is suitable only for system designs where full 35 A capacity is not required. This part maintains QC terminal mounting and extends the upper operating temperature to 150°C, matching the original MB356 specification.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can MB256-BP replace MB356 in all applications? A: No. MB256-BP is rated for 25 A average rectified current, compared to MB356's 35 A rating. Use MB256-BP only in applications where the system design accommodates reduced current capacity.

Q: What is the primary difference between MB356-BP and GBPC3506? A: Both parts maintain 35 A and 600 V specifications. The primary difference is mounting type: MB356-BP uses QC terminal mounting (matching the original MB356), while GBPC3506 requires chassis mount integration. Forward voltage is also slightly lower on GBPC3506 (1.1 V vs. 1.1 V at rated current).

Q: Are all substitute parts ROHS3 compliant? A: GBPC3506 is explicitly ROHS3 compliant. MB356-BP and MB256-BP do not have specified RoHS status in the provided data.

Q: What is the temperature operating range difference between substitutes? A: MB356-BP operates to 125°C maximum junction temperature, while MB356 and MB256-BP both support 150°C. For applications requiring full 150°C operation, MB256-BP or the original MB356 are appropriate selections.

Q: Can GBPC3506 be used as a direct mechanical replacement? A: No. GBPC3506 uses chassis mount configuration, requiring different mechanical integration compared to the QC terminal mounting of MB356. Electrical substitution is valid; mechanical redesign is necessary.

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