TMA124S-L Equivalent & Substitute Parts

Part Overview

The TMA124S-L is a standard TRIAC manufactured by Sanken Electric USA Inc., rated for 400V off-state voltage and 12A on-state current in a TO-220F through-hole package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. The part is RoHS compliant and suitable for AC switching applications within its specified electrical and thermal parameters.

Substiute Parts

TMA124S-L

Sanken Electric USA Inc.In Stock: 4644TMA124S-L Datasheet

Current PartRFQ

TMG10C80F5

Sanken Electric USA Inc.In Stock: 1222TMG10C80F5 Datasheet

MFR RecommendedRFQ

Q4030LH5TP

Littelfuse Inc.In Stock: 2874Q4030LH5TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TMA124S-L is determined by the following critical parameters:

• Voltage - Off State: 400V minimum required
• Current - On State: Minimum 12A capability
• Mounting Type: Through Hole configuration
• Package compatibility: TO-220 form factor
• RoHS compliance status
• Operating temperature range compatibility

The substitute parts identified are grouped based on their ability to meet or exceed these electrical specifications while maintaining package and mounting compatibility. The Q4030LH5TP from Littelfuse Inc. is listed as a direct substitute due to its matching 400V voltage rating, superior current handling (30A), compatible TO-220 package, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The Q4030LH5TP from Littelfuse Inc. is the primary substitute for the TMA124S-L. This part maintains the 400V voltage rating and TO-220 through-hole package configuration while providing superior current handling at 30A. The Q4030LH5TP is classified as active product status, ensuring long-term availability and supply chain stability. Both parts are RoHS compliant, meeting current environmental and regulatory requirements.

The TMG10C80F5 from Sanken Electric USA Inc. is an alternative from the original manufacturer with active product status and RoHS compliance. However, this part operates at 800V off-state voltage and 10A on-state current, representing a different electrical specification profile. Selection of this part requires confirmation that the higher voltage rating and lower current rating are compatible with the application requirements.

Frequently Asked Questions (FAQ)

Q: Can the Q4030LH5TP directly replace the TMA124S-L in existing designs?

A: The Q4030LH5TP matches the 400V voltage rating and TO-220 through-hole package of the TMA124S-L. The higher current rating (30A vs. 12A) and Alternistor snubberless design provide enhanced performance. The isolated tab variant of the TO-220 package must be verified for mechanical compatibility with the original full pack configuration in the PCB layout.

Q: What is the difference between the Standard TRIAC type and the Alternistor - Snubberless type?

A: The TMA124S-L is classified as a Standard TRIAC. The Q4030LH5TP is an Alternistor with snubberless design. Both are thyristor devices suitable for AC switching. The specific functional differences are determined by internal gate structure and switching characteristics, which are not detailed in the provided specifications.

Q: Why is the TMG10C80F5 listed as a substitute if it has different voltage and current ratings?

A: The TMG10C80F5 is listed as a manufacturer-recommended alternative from Sanken Electric USA Inc. The 800V voltage rating and 10A current rating represent different electrical specifications. This part is suitable only for applications where the higher voltage rating is required and the lower current rating is acceptable.

Q: Are there any temperature range considerations when substituting parts?

A: The TMA124S-L operates from -40°C to 125°C. The Q4030LH5TP operates from -25°C to 125°C. Applications requiring operation below -25°C must retain the original TMA124S-L or identify alternative parts with extended low-temperature specifications.

Q: What is the significance of the RoHS compliance difference between the parts?

A: The TMA124S-L is RoHS Compliant. The Q4030LH5TP is ROHS3 Compliant. Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents a more recent compliance standard. Both parts are suitable for applications with RoHS requirements.