MA3075WALT1 Equivalent & Substitute Parts

Part Overview

The MA3075WALT1 is a transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 6.5V reverse standoff voltage in a surface mount SOT-23-3 package. This component is classified as obsolete, with 3750 units available in current inventory. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility through matching electrical parameters and identical package specifications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	6.5V
Voltage - Breakdown (Min)	7.2V
Power - Peak Pulse	15W
Type	Zener
Unidirectional Channels	2
Capacitance @ Frequency	80pF @ 1MHz
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MA3075WALT1 is determined by the following criteria:

Primary Substitution Criteria:

Reverse standoff voltage within the 6.5V specification
Breakdown voltage minimum at or above 7.2V
Identical package configuration (SOT-23-3)
Zener diode type with 2 unidirectional channels
Surface mount mounting type

Direct Equivalent: MA3075WALT1G (onsemi) qualifies as a direct equivalent, sharing identical electrical specifications and package configuration while offering active product status and improved compliance (RoHS3 compliant vs. non-compliant).

Similar Voltage-Rated Substitutes: Parts with different voltage ratings (ESDA5V3L, ESDA6V1L, ESDA6V1L-TP, ESDA14V2L, ESDA25L, ESD24VS2UE6327HTSA1, SM12-7) are listed as similar alternatives. These parts maintain the same package and mounting type but operate at different voltage levels. Selection among these requires circuit-level voltage compatibility analysis.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Power - Peak Pulse	Package / Case	Product Status	RoHS Status	Operating Temperature
MA3075WALT1	onsemi	6.5V	7.2V	15W	TO-236-3, SC-59, SOT-23-3	Obsolete	Non-compliant	-55°C ~ 150°C
MA3075WALT1G	onsemi	6.5V	7.2V	15W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-55°C ~ 150°C
ESDA6V1L	STMicroelectronics	5.25V	6.1V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-40°C ~ 125°C
ESDA6V1L-TP	Micro Commercial Co	5.25V	6.1V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-40°C ~ 125°C
ESDA5V3L	STMicroelectronics	3V	5.3V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-40°C ~ 125°C
ESDA14V2L	STMicroelectronics	12V	14.2V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-40°C ~ 125°C
ESDA25L	STMicroelectronics	24V	25V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-40°C ~ 125°C
SM12-7	Diodes Incorporated	12V (Max)	13.3V	300W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-65°C ~ 150°C
ESD24VS2UE6327HTSA1	Infineon Technologies	24V (Max)	26V	230W	TO-236-3, SC-59, SOT-23-3	Active	RoHS3 Compliant	-55°C ~ 150°C

Engineering Selection Recommendations

Recommended Direct Replacement: MA3075WALT1G is the primary recommendation for direct substitution. It maintains identical electrical specifications and package configuration while offering active product status, RoHS3 compliance, and automotive-grade qualification (AEC-Q101). This part is suitable for all applications currently using MA3075WALT1.

Voltage-Specific Alternatives: Selection of alternative voltage-rated parts (ESDA series, SM12-7, ESD24VS2UE6327HTSA1) requires verification that the circuit design accommodates the different reverse standoff and breakdown voltages. These parts are suitable only when circuit topology and voltage protection requirements align with their respective ratings.

Compliance Considerations: All substitute parts listed are RoHS3 compliant, addressing regulatory requirements that the original MA3075WALT1 does not meet. Parts with automotive qualification (MA3075WALT1G, SM12-7) are suitable for automotive applications requiring AEC-Q101 certification.

Temperature Range Considerations: The original MA3075WALT1 operates from -55°C to 150°C. Most STMicroelectronics ESDA variants operate from -40°C to 125°C, which may not be suitable for applications requiring the full -55°C to 150°C range. SM12-7 and ESD24VS2UE6327HTSA1 maintain the extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can MA3075WALT1G be used as a direct replacement for MA3075WALT1? A: Yes. MA3075WALT1G is electrically and mechanically identical to MA3075WALT1, with the advantage of active product status and RoHS3 compliance. No circuit modifications are required.

Q: What determines whether an alternative voltage-rated part can substitute for MA3075WALT1? A: The circuit's voltage protection requirements must align with the substitute part's reverse standoff and breakdown voltage specifications. Parts with lower voltage ratings (ESDA5V3L, ESDA6V1L) provide protection at lower thresholds, while higher-rated parts (ESDA14V2L, ESDA25L) activate at higher voltages. Circuit analysis is required to confirm compatibility.

Q: Are all substitute parts available in the same package? A: Yes. All listed substitute parts use the SOT-23-3 package configuration, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Do substitute parts meet the same temperature operating range as MA3075WALT1? A: No. Most STMicroelectronics ESDA parts operate from -40°C to 125°C, which is narrower than the original -55°C to 150°C range. SM12-7 and ESD24VS2UE6327HTSA1 maintain the extended range. Verify application temperature requirements before selection.

Q: Which substitute parts carry automotive qualification? A: MA3075WALT1G and SM12-7 are qualified to AEC-Q101 automotive standards. Other parts are suitable for general-purpose applications.

Q: What is the difference between Cut Tape and Tape & Reel packaging options? A: Both are surface mount formats suitable for automated assembly. Cut Tape (CT) & Digi-Reel® is used for lower-volume applications, while Tape & Reel (TR) is optimized for high-volume production. Electrical and mechanical specifications remain identical.

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