TMA36H-L Equivalent & Substitute Parts

Part Overview

The TMA36H-L is a standard TRIAC thyristor rated for 600V off-state voltage and 3A on-state current in a TO-220-3 Full Pack through-hole package. Manufactured by Sanken Electric USA Inc., this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing design support and production continuity.

Substiute Parts

TMA36H-L

Sanken Electric USA Inc.In Stock: 768TMA36H-L Datasheet

Current PartRFQ

ACST435-8FP

STMicroelectronicsIn Stock: 1008ACST435-8FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMA36H-L is determined by the following critical parameters:

• Voltage Rating (Off State): The substitute must equal or exceed 600V to maintain voltage margin in the application circuit.
• Current Rating (On State): The substitute must equal or exceed 3A to handle the specified load current.
• Gate Trigger Characteristics: Vgt and Igt values must be compatible with the gate drive circuit design.
• Surge Current Rating (Itsm): Must match or exceed the specified 30A/32A rating for transient protection.
• Package and Mounting: TO-220-3 Full Pack through-hole configuration ensures mechanical and thermal compatibility.
• Operating Temperature Range: Must support -40°C to 125°C junction temperature operation.
• Compliance: RoHS compliance status ensures regulatory alignment.

The ACST435-8FP from STMicroelectronics meets these substitution criteria with enhanced ratings in voltage (800V) and current (4A), providing design margin while maintaining compatible gate trigger and surge current specifications.

Parameter Comparison

Engineering Selection Recommendations

The ACST435-8FP is a direct substitute for the obsolete TMA36H-L based on the following factors:

• Product Status: The ACST435-8FP is active and in production, ensuring long-term availability and supply chain stability compared to the obsolete TMA36H-L.
• Electrical Compatibility: The substitute exceeds the minimum voltage and current requirements of the original part, providing design margin without requiring circuit modification.
• Compliance: Both parts are RoHS compliant. The ACST435-8FP carries ROHS3 compliance, meeting current regulatory standards.
• Package Compatibility: Identical TO-220-3 Full Pack through-hole configuration allows direct mechanical and thermal substitution.
• Thermal Performance: Matching operating temperature range (-40°C to 125°C) ensures equivalent thermal behavior in the application.

Frequently Asked Questions (FAQ)

Q: Can the ACST435-8FP directly replace the TMA36H-L without circuit modification?

A: Yes. The ACST435-8FP meets or exceeds all critical electrical parameters of the TMA36H-L. The higher voltage rating (800V vs. 600V) and current rating (4A vs. 3A) provide design margin. The identical TO-220-3 package enables direct mechanical substitution.

Q: What are the key differences between these parts?

A: The ACST435-8FP has higher voltage (800V vs. 600V) and current (4A vs. 3A) ratings. The gate trigger voltage (Vgt) is lower (1.1V vs. 1.5V), and gate trigger current (Igt) is higher (35mA vs. 20mA). Surge current ratings are identical. The ACST435-8FP is active; the TMA36H-L is obsolete.

Q: Are the gate drive requirements different?

A: The ACST435-8FP requires higher gate trigger current (35mA vs. 20mA) but has lower gate trigger voltage (1.1V vs. 1.5V). Gate drive circuits designed for the TMA36H-L must be evaluated to confirm adequate current sourcing capability for the substitute.

Q: Is the TO-220-3 package identical between both parts?

A: Yes. Both parts use the TO-220-3 Full Pack through-hole package, ensuring identical pinout, mechanical fit, and thermal interface characteristics.

Q: What is the compliance status of each part?

A: The TMA36H-L is RoHS Compliant. The ACST435-8FP is ROHS3 Compliant, meeting current environmental and hazardous substance restrictions.