MMQA15VT1G Equivalent & Substitute Parts

Part Overview

The MMQA15VT1G is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection applications. This surface-mount component features a 11V reverse standoff voltage with 21.7V maximum clamping voltage and 1.1A peak pulse current capability in an SC-74 package. The part is currently in active production status with ROHS3 compliance and AEC-Q101 automotive qualification available in select variants. Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility to support design flexibility and supply chain continuity.

Substiute Parts

MMQA15VT1G

onsemiIn Stock: 17293MMQA15VT1G Datasheet

Current PartRFQ

SZMMQA15VT1G

onsemiIn Stock: 1013SZMMQA15VT1G Datasheet

DirectRFQ

BZA420A,115

Nexperia USA Inc.In Stock: 12207BZA420A,115 Datasheet

SimilarRFQ

BZA420A,125

Nexperia USA Inc.In Stock: 7007BZA420A,125 Datasheet

SimilarRFQ

BZA456A,115

Nexperia USA Inc.In Stock: 15343BZA456A,115 Datasheet

SimilarRFQ

BZA456A,125

Nexperia USA Inc.In Stock: 836BZA456A,125 Datasheet

SimilarRFQ

BZA456A,135

Nexperia USA Inc.In Stock: 11108BZA456A,135 Datasheet

SimilarRFQ

BZA456A,165

Nexperia USA Inc.In Stock: 11152BZA456A,165 Datasheet

SimilarRFQ

ESDA19SC6

STMicroelectronicsIn Stock: 92337ESDA19SC6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMQA15VT1G are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff: 11V maximum
• Voltage - Clamping (Max) @ Ipp: 21.7V
• Current - Peak Pulse (10/1000µs): 1.1A (8/20µs)
• Power - Peak Pulse: 150W
• Type: Zener diode
• Unidirectional Channels: 4
• Package / Case: SC-74, SOT-457 or equivalent surface-mount package
• Operating Temperature Range: -55°C to 150°C (TJ)
• RoHS Status: ROHS3 Compliant

Direct Equivalent: SZMMQA15VT1G (onsemi) is a direct equivalent with identical electrical specifications and package configuration. This part shares the same base product number (SZMMQA15) and maintains all key parameters. The primary distinction is product status (Obsolete) and automotive qualification (AEC-Q101).

Similar Substitutes: Parts listed as similar substitutes (BZA420A series and BZA456A series from Nexperia USA Inc., and ESDA19SC6 from STMicroelectronics) operate within the allowed parameter ranges for this product category but feature different voltage ratings, current capabilities, and package configurations. These parts are suitable for applications where the specific voltage and current requirements of the MMQA15VT1G are not mandatory constraints.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection: SZMMQA15VT1G is the direct electrical and mechanical equivalent to MMQA15VT1G. Both parts maintain identical voltage ratings (11V reverse standoff, 21.7V clamping), current specifications (1.1A peak pulse), and package configuration (SC-74, SOT-457). Selection between these two parts depends on product status requirements and automotive qualification needs. SZMMQA15VT1G carries AEC-Q101 automotive qualification and is suitable for automotive applications, while MMQA15VT1G is in active production status with broader availability (17271 units in stock versus 984 units).

Similar Substitute Selection: BZA420A series (115 and 125 variants) from Nexperia USA Inc. are active-status alternatives with higher voltage ratings (20V reverse standoff, 28V clamping) and lower power dissipation (19.6W). These parts are suitable for applications requiring higher voltage protection margins. Both variants carry AEC-Q100 automotive qualification.

BZA456A series (115, 125, and 135 variants) from Nexperia USA Inc. are active-status alternatives with lower voltage ratings (5.6V reverse standoff, 8V clamping) but higher current capability (3A peak pulse) and lower power dissipation (24W). These parts are suitable for lower-voltage protection applications requiring higher current handling. All variants carry AEC-Q100 automotive qualification.

ESDA19SC6 from STMicroelectronics is an active-status alternative with intermediate voltage rating (15V reverse standoff) and significantly higher power dissipation capability (300W). This part operates at a reduced upper temperature limit (-40°C to 125°C TA) and uses a different package configuration (SOT-23-6). Selection of this part requires PCB layout modification to accommodate the different package footprint.

All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and surface-mount technology compatibility with the original MMQA15VT1G design.

Frequently Asked Questions (FAQ)

Q: Can SZMMQA15VT1G be used as a direct replacement for MMQA15VT1G? A: Yes. SZMMQA15VT1G is a direct equivalent with identical electrical specifications (11V reverse standoff, 21.7V clamping voltage, 1.1A peak pulse current) and package configuration (SC-74, SOT-457). The primary difference is product status (Obsolete versus Active) and automotive qualification level (AEC-Q101 versus standard). For applications requiring automotive qualification, SZMMQA15VT1G is the preferred choice.

Q: What are the key differences between MMQA15VT1G and BZA420A series substitutes? A: BZA420A series parts feature higher voltage ratings (20V reverse standoff versus 11V, 28V clamping versus 21.7V) and lower power dissipation (19.6W versus 150W). These parts are suitable for applications requiring higher overvoltage protection margins. Both BZA420A,115 and BZA420A,125 carry AEC-Q100 automotive qualification and are in active production status.

Q: When should BZA456A series parts be selected over MMQA15VT1G? A: BZA456A series parts (115, 125, 135 variants) feature lower voltage ratings (5.6V reverse standoff, 8V clamping) but higher peak pulse current capability (3A versus 1.1A). Select these parts for applications protecting lower-voltage circuits requiring higher current handling capacity. All variants are in active production status with AEC-Q100 automotive qualification.

Q: Is ESDA19SC6 compatible with existing MMQA15VT1G PCB layouts? A: No. ESDA19SC6 uses a different package configuration (SOT-23-6 versus SC-74, SOT-457), requiring PCB layout modification. Additionally, ESDA19SC6 operates at a reduced upper temperature limit (-40°C to 125°C TA versus -55°C to 150°C TJ) and does not carry automotive qualification. This part is suitable only for applications where package footprint change is acceptable and automotive qualification is not required.

Q: Do all substitute parts maintain ROHS3 compliance? A: Yes. All listed substitute parts (SZMMQA15VT1G, BZA420A series, BZA456A series, and ESDA19SC6) maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of MMQA15VT1G.

Q: Which substitute part offers the highest inventory availability? A: ESDA19SC6 from STMicroelectronics has the highest inventory availability (92300 units in stock). However, this part requires PCB layout modification due to different package configuration and does not carry automotive qualification. For direct package compatibility, BZA456A,135 offers strong availability (11091 units) with active production status and AEC-Q100 automotive qualification.