TMA256B-L Equivalent & Substitute Parts

Part Overview

The TMA256B-L is a standard TRIAC manufactured by Sanken Electric USA Inc., rated for 600V off-state voltage and 25A on-state current in a Through Hole TO-3PF package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -40°C to 125°C and is RoHS compliant.

Substiute Parts

TMA256B-L

Sanken Electric USA Inc.In Stock: 788TMA256B-L Datasheet

Current PartRFQ

BCR25RM-12LB#B00

Renesas Electronics CorporationIn Stock: 1258BCR25RM-12LB#B00 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMA256B-L is determined by matching the following critical electrical and mechanical parameters:

• Off-state voltage rating: 600V minimum
• On-state current rating: 25A minimum
• Gate trigger voltage: within acceptable design margins
• Gate trigger current: within acceptable design margins
• Non-repetitive surge current: 250A minimum at 50Hz
• Through Hole mounting configuration
• Compatible package footprint (TO-3PF or TO-3PFM variants)
• Operating temperature range compatibility

The BCR25RM-12LB#B00 meets these substitution criteria with equivalent electrical ratings and compatible through-hole packaging.

Parameter Comparison

Engineering Selection Recommendations

The BCR25RM-12LB#B00 is an active product from Renesas Electronics Corporation and represents a direct functional equivalent to the obsolete TMA256B-L. Both components share identical voltage and current ratings, with the substitute offering an extended operating temperature range (-40°C to 150°C versus -40°C to 125°C). The BCR25RM-12LB#B00 maintains RoHS3 compliance and is currently in active production with confirmed inventory availability. Gate trigger parameters (Vgt and Igt) are slightly higher on the substitute but remain within acceptable design tolerances for standard TRIAC applications. The TO-3PFM package is mechanically compatible with TO-3PF footprints in through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the BCR25RM-12LB#B00 directly replace the TMA256B-L in existing designs?

A: Yes. Both components are standard TRIACs with identical 600V and 25A ratings, single configuration, and through-hole mounting. The TO-3PFM package is mechanically compatible with TO-3PF footprints. Gate trigger parameters are slightly higher on the substitute but do not prevent functional substitution in standard applications.

Q: What is the difference between TO-3PF and TO-3PFM packages?

A: Both are through-hole TO-3P variants. The TO-3PFM is a variant designation used by Renesas. The mechanical footprint and pin configuration remain compatible for PCB mounting purposes.

Q: Does the higher operating temperature range of the BCR25RM-12LB#B00 affect compatibility?

A: No. The extended upper temperature limit (150°C versus 125°C) provides additional thermal margin and does not create compatibility issues. Applications designed for the TMA256B-L will operate within the BCR25RM-12LB#B00 specifications.

Q: Are there compliance differences between the two parts?

A: The TMA256B-L is RoHS compliant. The BCR25RM-12LB#B00 is ROHS3 compliant and REACH affected. Both meet current regulatory requirements for electronic components.

Q: What are the gate trigger parameter differences?

A: The TMA256B-L specifies Vgt (Max) of 1.5V and Igt (Max) of 30mA. The BCR25RM-12LB#B00 specifies Vgt (Max) of 2V and Igt (Max) of 50mA. These differences are within normal design tolerances for TRIAC gate drive circuits and do not prevent substitution.