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MMQA15VT1 Equivalent & Substitute Parts
Part Overview
The MMQA15VT1 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This 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 MMQA15VT1 is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The direct successor MMQA15VT1G maintains identical electrical specifications while offering active product status and improved compliance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 11V (Max) | V |
| Voltage - Breakdown (Min) | 14.3V | V |
| Voltage - Clamping (Max) @ Ipp | 21.7V | V |
| Current - Peak Pulse (10/1000µs) | 1.1A (8/20µs) | A |
| Power - Peak Pulse | 150W | W |
| Operating Temperature | -55°C ~ 150°C (TJ) | °C |
| Package / Case | SC-74, SOT-457 | — |
| Mounting Type | Surface Mount | — |
| Unidirectional Channels | 4 | — |
Substitute Part Grouping Explanation
Substitution for the MMQA15VT1 is determined by the following critical parameters:
Voltage - Reverse Standoff, Voltage - Clamping (Max) @ Ipp, Current - Peak Pulse, Power - Peak Pulse, Package / Case, Mounting Type, and Operating Temperature range.
The primary substitute is MMQA15VT1G, which is the direct equivalent with identical electrical specifications and active product status. This part differs only in packaging format (Tape & Reel) and compliance status (RoHS3 Compliant vs. non-compliant).
The Nexperia BZA420A and BZA456A series parts listed represent alternative TVS diodes with different voltage and current ratings. These parts are included in the original substitute list but operate at different voltage levels (20V standoff for BZA420A series, 5.6V standoff for BZA456A series) and therefore are not direct electrical equivalents. Selection of these alternatives requires circuit-level analysis to confirm compatibility with the intended protection scheme.
Parameter Comparison
| Parameter | MMQA15VT1 | MMQA15VT1G | BZA420A,115 | BZA420A,125 | BZA420A,135 | BZA420A,165 | BZA456A,115 | BZA456A,125 | BZA456A,135 | BZA456A,165 |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | onsemi | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. | Nexperia USA Inc. |
| Voltage - Reverse Standoff (Typ) | 11V | 11V | 20V | 20V | 20V | 20V | 5.6V | 5.6V | 5.6V | 5.6V |
| Voltage - Clamping (Max) @ Ipp | 21.7V | 21.7V | 28V | 28V | 28V | 28V | 8V | 8V | 8V | 8V |
| Current - Peak Pulse (10/1000µs) | 1.1A (8/20µs) | 1.1A (8/20µs) | — | — | — | — | 3A (8/20µs) | 3A (8/20µs) | 3A (8/20µs) | 3A (8/20µs) |
| Power - Peak Pulse | 150W | 150W | 19.6W | 19.6W | 19.6W | 19.6W | 24W | 24W | 24W | 24W |
| Operating Temperature | -55°C ~ 150°C | -55°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C | -65°C ~ 150°C |
| Package / Case | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 | SC-74, SOT-457 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Unidirectional Channels | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | Non-compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant | RoHS3 Compliant |
| AEC-Q100 Qualification | — | — | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Engineering Selection Recommendations
For direct replacement of the obsolete MMQA15VT1, select MMQA15VT1G. This part maintains identical electrical performance (11V reverse standoff, 21.7V clamping voltage, 1.1A peak pulse current, 150W peak power) while offering active product status and RoHS3 compliance. The only difference is packaging format; MMQA15VT1G is supplied in Tape & Reel format.
The Nexperia BZA420A and BZA456A series parts are not direct electrical equivalents due to significantly different voltage ratings and power dissipation characteristics. BZA420A variants operate at 20V standoff with 28V clamping and reduced power capability (19.6W). BZA456A variants operate at 5.6V standoff with 8V clamping and 24W power capability. These parts are suitable only for applications with different voltage protection requirements and require circuit validation before implementation.
All Nexperia alternatives carry AEC-Q100 automotive qualification and RoHS3 compliance, providing enhanced regulatory coverage compared to the original MMQA15VT1.
Frequently Asked Questions (FAQ)
Q: Can MMQA15VT1G be used as a direct replacement for MMQA15VT1?
A: Yes. MMQA15VT1G is the direct equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel vs. bulk). Both parts feature 11V reverse standoff, 21.7V clamping voltage, and 1.1A peak pulse current in SC-74 packages.
Q: Why are BZA420A and BZA456A parts listed as substitutes if they have different voltage ratings?
A: These parts are listed in the original substitute field but are not direct electrical equivalents. They represent alternative TVS diode options from a different manufacturer. Selection requires circuit-level analysis to confirm compatibility with the intended protection scheme.
Q: What is the difference between the various BZA420A and BZA456A part numbers (115, 125, 135, 165)?
A: The suffix designations (115, 125, 135, 165) represent different packaging tape specifications and reels. All variants within each series (BZA420A or BZA456A) maintain identical electrical characteristics. Selection depends on tape and reel requirements for automated assembly.
Q: Does MMQA15VT1G offer better compliance than the original MMQA15VT1?
A: Yes. MMQA15VT1G is RoHS3 compliant, whereas MMQA15VT1 is non-compliant. Both parts are REACH unaffected and carry EAR99 ECCN classification.
Q: Are the Nexperia parts suitable for automotive applications?
A: Yes. All BZA420A and BZA456A variants carry AEC-Q100 automotive qualification. The original MMQA15VT1 and MMQA15VT1G do not list automotive qualification.
Q: What is the operating temperature range difference?
A: MMQA15VT1 and MMQA15VT1G operate from -55°C to 150°C. All Nexperia alternatives (BZA420A and BZA456A series) operate from -65°C to 150°C, providing extended low-temperature performance.
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