BAW74 Equivalent & Substitute Parts

Part Overview

The BAW74 is a general-purpose diode array manufactured by onsemi, configured as 1 pair common anode with a maximum reverse voltage of 50 V and average rectified current of 200 mA per diode. The device is housed in a surface mount TO-236-3 (SC-59, SOT-23-3) package. The BAW74 is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain compatibility with the original circuit requirements while meeting current availability and compliance standards.

Substiute Parts

BAW74

onsemiIn Stock: 3322BAW74 Datasheet

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MMBD1205

onsemiIn Stock: 35431MMBD1205 Datasheet

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M1MA151WAT1G

onsemiIn Stock: 30437M1MA151WAT1G Datasheet

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BAW56-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 35154BAW56-E3-08 Datasheet

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CMPD2836 TR PBFREE

Central Semiconductor CorpIn Stock: 12678CMPD2836 TR PBFREE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BAW74 are selected based on the following criteria:

Configuration Match: All substitute parts maintain the 1 pair common anode diode configuration, ensuring pin-compatible replacement in the circuit.

Package Compatibility: All substitutes use the TO-236-3, SC-59, or SOT-23-3 surface mount package, enabling direct PCB footprint compatibility.

Electrical Parameter Tolerance: Substitute parts are grouped by their ability to operate within or exceed the BAW74 operating envelope. The critical parameters for substitution are:

• Voltage - DC Reverse (Vr): Minimum 50 V required; higher ratings provide design margin
• Current - Average Rectified (Io): Minimum 200 mA required; higher ratings provide operational margin
• Reverse Recovery Time (trr): 4 ns baseline; variations acceptable within small-signal diode classification
• Operating Temperature: 150°C maximum maintained across all substitutes

Compliance & Status: All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

MMBD1205 (onsemi): Direct manufacturer alternative with identical current rating (200 mA) and reverse recovery time (4 ns). Provides enhanced voltage rating (100 V vs. 50 V), offering increased design margin for reverse voltage stress. Active product status ensures long-term availability. Recommended for applications requiring maximum voltage headroom.

CMPD2836 TR PBFREE (Central Semiconductor Corp): Maintains 200 mA current rating and 4 ns reverse recovery time. Voltage rating of 75 V exceeds BAW74 specification. Active product status with ROHS3 compliance. Suitable for designs requiring voltage margin with equivalent current handling.

BAW56-E3-08 (Vishay General Semiconductor): Offers highest current rating (250 mA) and 70 V voltage rating. Reverse recovery time of 6 ns remains within small-signal diode classification. Active product status. Appropriate for applications with elevated current requirements or voltage stress conditions.

M1MA151WAT1G (onsemi): Lower current rating (100 mA) and voltage rating (40 V) relative to BAW74. Suitable only for applications with reduced current and voltage demands. Not recommended as primary substitute due to parameter reduction.

All substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory adherence and procurement continuity.

Frequently Asked Questions (FAQ)

Q: Can MMBD1205 directly replace BAW74 in all applications?

A: MMBD1205 is pin-compatible and maintains the same current rating (200 mA) and reverse recovery time (4 ns). The higher voltage rating (100 V vs. 50 V) does not create incompatibility. Direct substitution is supported from an electrical and mechanical standpoint.

Q: What is the significance of the 1 pair common anode configuration?

A: The 1 pair common anode configuration defines the internal diode arrangement and pin connectivity. All substitute parts maintain this configuration, ensuring identical pin functionality and circuit behavior. This configuration is essential for direct PCB replacement.

Q: Why is M1MA151WAT1G listed as a substitute if it has lower ratings?

A: M1MA151WAT1G is listed as a similar part due to package and configuration compatibility. However, its 100 mA current rating and 40 V voltage rating fall below BAW74 specifications. This part is suitable only for circuits designed for reduced current and voltage operation and is not recommended as a general replacement.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts are available in surface mount TO-236-3, SC-59, or SOT-23-3 packages. Specific packaging variants (Cut Tape, Tape & Reel, Digi-Reel) vary by manufacturer and distributor. Verify packaging availability with your supplier for procurement requirements.

Q: What is the impact of reverse recovery time differences among substitutes?

A: BAW74 and MMBD1205 both specify 4 ns reverse recovery time. BAW56-E3-08 specifies 6 ns, and M1MA151WAT1G specifies 10 ns. All values remain within the small-signal diode classification. Differences are negligible for general-purpose rectification applications but may affect high-frequency switching performance.

Q: Do all substitutes meet the same compliance standards as BAW74?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching BAW74 compliance status. All carry EAR99 ECCN classification and identical HTSUS codes, ensuring regulatory and trade compliance equivalence.

Q: Which substitute offers the best overall compatibility?

A: MMBD1205 provides the closest electrical match with identical current (200 mA) and reverse recovery time (4 ns) specifications, combined with enhanced voltage rating and active product status. This part is the primary recommendation for direct BAW74 replacement.