TMA164P-L Equivalent & Substitute Parts

Part Overview

The TMA164P-L is a standard TRIAC manufactured by Sanken Electric USA Inc., rated for 400V off-state voltage and 16A on-state current in a TO-3P package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part is RoHS compliant and suitable for AC switching applications requiring through-hole mounting.

Substiute Parts

TMA164P-L

Sanken Electric USA Inc.In Stock: 2210TMA164P-L Datasheet

Current PartRFQ

Q4025K6TP

Littelfuse Inc.In Stock: 2188Q4025K6TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMA164P-L is determined by the following critical parameters:

• Voltage - Off State: 400V minimum requirement
• Current - On State: Minimum 16A capability
• Gate Trigger Voltage (Vgt): Maximum 1.5V
• Gate Trigger Current (Igt): Maximum 30mA
• Operating Temperature Range: -40°C to 125°C
• Mounting Type: Through Hole configuration
• RoHS Compliance: Required for regulatory alignment

The Q4025K6TP meets or exceeds all critical electrical parameters while maintaining through-hole mounting compatibility. Although the Q4025K6TP features a different package type (TO-218 Isolated Tab versus TO-3P-3), it satisfies the functional requirements for AC switching applications within the specified voltage and current ratings.

Parameter Comparison

Engineering Selection Recommendations

The Q4025K6TP is a suitable substitute for the obsolete TMA164P-L based on the following factors:

• Both components maintain 400V off-state voltage rating, meeting the primary application requirement
• The Q4025K6TP current rating of 25A exceeds the TMA164P-L requirement of 16A, providing operational margin
• Gate trigger specifications of the Q4025K6TP (Vgt 1.3V, Igt 80mA) are compatible with standard gate drive circuits designed for the TMA164P-L
• Both components operate across the identical temperature range of -40°C to 125°C
• The Q4025K6TP is actively manufactured by Littelfuse Inc., ensuring long-term availability
• Both components maintain RoHS compliance, satisfying regulatory requirements
• Package transition from TO-3P-3 to TO-218 Isolated Tab requires PCB layout modification and thermal management evaluation

Frequently Asked Questions (FAQ)

Q: Can the Q4025K6TP directly replace the TMA164P-L without PCB modifications?

A: The Q4025K6TP requires PCB layout changes due to different package geometry (TO-218 Isolated Tab versus TO-3P-3). Pin configuration and thermal interface differ between packages.

Q: Does the higher gate trigger current (Igt) of the Q4025K6TP affect circuit compatibility?

A: The Q4025K6TP gate trigger current of 80mA exceeds the TMA164P-L specification of 30mA. Gate drive circuits must supply sufficient current to meet this requirement. Existing circuits designed for 30mA may require gate drive circuit adjustment.

Q: Are both components suitable for the same voltage class applications?

A: Yes. Both the TMA164P-L and Q4025K6TP are rated for 400V off-state voltage and are suitable for equivalent voltage class applications.

Q: What is the significance of the Q4025K6TP being an Alternistor - Snubberless type?

A: The Alternistor - Snubberless designation indicates the Q4025K6TP incorporates integrated snubber functionality, reducing external component requirements in some circuit topologies compared to standard TRIAC designs.

Q: Is thermal management different between these two packages?

A: Yes. The TO-3P-3 and TO-218 Isolated Tab packages have different thermal characteristics. The TO-218 Isolated Tab provides isolated mounting capability. Thermal analysis is required for the specific application to ensure adequate heat dissipation.

Q: Are there inventory considerations for the Q4025K6TP?

A: The Q4025K6TP is actively manufactured and available. The TMA164P-L is obsolete with limited remaining inventory. For new designs or long-term production, the Q4025K6TP is the recommended choice.