MMQA13VT1G Equivalent & Substitute Parts

Part Overview

The MMQA13VT1G is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 9.8V reverse standoff voltage with an 18.6V maximum clamping voltage and 1.29A peak pulse current rating (8/20µs). The part is packaged in SC-74 (SOT-457) configuration with four unidirectional channels.

The MMQA13VT1G is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Manufacturer	onsemi	—
Part Number	MMQA13VT1G	—
Category	Transient Voltage Suppressors (TVS)	—
Type	Zener	—
Unidirectional Channels	4	—
Voltage - Reverse Standoff (Typ)	9.8	V (Max)
Voltage - Breakdown (Min)	12.4	V
Voltage - Clamping (Max) @ Ipp	18.6	V
Current - Peak Pulse (8/20µs)	1.29	A
Power - Peak Pulse	150	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	SC-74, SOT-457	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMQA13VT1G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Unidirectional channel count: 4 channels
Package type: SC-74 / SOT-457 surface mount
Voltage rating compatibility: Reverse standoff voltage and clamping voltage within acceptable operating margins
Peak pulse current capability: Minimum 1.29A (8/20µs)
Peak pulse power dissipation: Minimum 150W
Operating temperature range: Minimum -55°C to 150°C

Substitute Part Groups:

Group 1: BZA420A Series (Nexperia USA Inc.)

Part numbers: BZA420A,115 | BZA420A,125 | BZA420A,165
Voltage rating: 20V reverse standoff, 28V clamping
Package: 6-TSOP (SC-74 compatible)
Peak pulse power: 19.6W
Status: Active, AEC-Q100 qualified, ROHS3 compliant

Group 2: BZA456A Series (Nexperia USA Inc.)

Part numbers: BZA456A,115 | BZA456A,125 | BZA456A,135 | BZA456A,165
Voltage rating: 5.6V reverse standoff, 8V clamping
Package: 6-TSOP (SC-74 compatible)
Peak pulse current: 3A (8/20µs)
Peak pulse power: 24W
Status: Active, AEC-Q100 qualified, ROHS3 compliant

Group 3: ESDA14V2SC6 (STMicroelectronics)

Voltage rating: 12V reverse standoff, 14.2V breakdown
Package: SOT-23-6
Peak pulse power: 300W
Status: Active, ROHS3 compliant

Parameter Comparison

Parameter	MMQA13VT1G	BZA420A,115	BZA420A,125	BZA420A,165	BZA456A,115	BZA456A,125	BZA456A,135	BZA456A,165	ESDA14V2SC6
Manufacturer	onsemi	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	Nexperia	STMicroelectronics
Type	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	4	4	4	4	4	4	4	4	4
Voltage - Reverse Standoff (Typ)	9.8V	20V	20V	20V	5.6V	5.6V	5.6V	5.6V	12V
Voltage - Clamping (Max) @ Ipp	18.6V	28V	28V	28V	8V	8V	8V	8V	—
Current - Peak Pulse (8/20µs)	1.29A	—	—	—	3A	3A	3A	3A	—
Power - Peak Pulse	150W	19.6W	19.6W	19.6W	24W	24W	24W	24W	300W
Operating Temperature Range	-55 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-40 to 125°C
Package / Case	SC-74, SOT-457	6-TSOP	6-TSOP	6-TSOP	6-TSOP	6-TSOP	6-TSOP	6-TSOP	SOT-23-6
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
Qualification	—	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	AEC-Q100	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BZA420A Series Substitutes (BZA420A,115 | BZA420A,125 | BZA420A,165)

These Nexperia parts are suitable for applications requiring higher voltage protection (20V standoff, 28V clamping). All variants carry AEC-Q100 automotive qualification and ROHS3 compliance. The 6-TSOP package is mechanically compatible with SC-74 footprints. Selection among the three variants (115, 125, 165) is determined by tape reel specifications and does not affect electrical performance. These parts are recommended for new designs where higher voltage margins are acceptable.

BZA456A Series Substitutes (BZA456A,115 | BZA456A,125 | BZA456A,135 | BZA456A,165)

These Nexperia parts provide lower voltage protection (5.6V standoff, 8V clamping) with higher peak pulse current capability (3A). All variants are AEC-Q100 qualified and ROHS3 compliant. The 6-TSOP package is mechanically compatible with SC-74 footprints. These parts are suitable for applications requiring lower voltage thresholds with enhanced current handling. Selection among variants (115, 125, 135, 165) is determined by tape reel specifications.

ESDA14V2SC6 Substitute (STMicroelectronics)

This part offers 12V reverse standoff voltage with significantly higher peak pulse power dissipation (300W). The SOT-23-6 package differs from the original SC-74 footprint and requires PCB layout modification. ROHS3 compliance is confirmed. This part is suitable for applications where higher power dissipation is required and package redesign is feasible.

Selection Criteria:

For voltage-compatible replacements with automotive qualification: BZA420A or BZA456A series
For applications requiring higher power dissipation: ESDA14V2SC6
All active substitutes provide extended operating temperature ranges (-65°C to 150°C) compared to the original part (-55°C to 150°C)

Frequently Asked Questions (FAQ)

Q: Can BZA420A series parts directly replace MMQA13VT1G?

A: BZA420A parts are mechanically compatible (6-TSOP package fits SC-74 footprints) and electrically suitable for applications where higher voltage protection (20V standoff, 28V clamping) is acceptable. The higher voltage rating provides additional margin but may not be appropriate for circuits designed specifically for 9.8V standoff protection.

Q: What is the difference between BZA420A,115 | BZA420A,125 | BZA420A,165?

A: These designations refer to different tape reel specifications and packaging configurations. Electrical performance is identical across all three variants. Selection is based on procurement and assembly requirements.

Q: Are BZA456A parts suitable for the MMQA13VT1G application?

A: BZA456A parts feature lower voltage ratings (5.6V standoff, 8V clamping) and higher peak pulse current (3A). These are suitable only for applications where the lower voltage threshold is compatible with circuit requirements. The higher current capability provides enhanced transient protection.

Q: Does ESDA14V2SC6 require PCB redesign?

A: Yes. ESDA14V2SC6 uses SOT-23-6 packaging, which differs from the original SC-74 footprint. PCB layout modification is required for this substitution.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (BZA420A series, BZA456A series, and ESDA14V2SC6) are ROHS3 compliant. The original MMQA13VT1G RoHS status was not specified in available documentation.

Q: Which substitute offers the best thermal performance?

A: ESDA14V2SC6 provides the highest peak pulse power dissipation (300W), making it suitable for applications with demanding thermal requirements. However, its operating temperature range (-40°C to 125°C) is narrower than the Nexperia alternatives (-65°C to 150°C).

Q: Are automotive-grade substitutes available?

A: Yes. All BZA420A and BZA456A variants carry AEC-Q100 automotive qualification, making them suitable for automotive and industrial applications requiring certified components.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message