TM2561B-L TRIAC 600V 25A Equivalent & Substitute Parts

Part Overview

The TM2561B-L is a standard TRIAC manufactured by Sanken Electric USA Inc., rated for 600V off-state voltage and 25A on-state current in a TO-3PF through-hole package. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations. The obsolete status necessitates sourcing alternative components that maintain electrical and mechanical compatibility with existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It (RMS)) (Max)	25	A
Voltage - Gate Trigger (Vgt) (Max)	2	V
Current - Gate Trigger (Igt) (Max)	30	mA
Current - Hold (Ih) (Max)	40	mA
Operating Temperature Range	-40°C to 125°C	TJ
Mounting Type	Through Hole	-
Package / Case	TO-3P-3	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the TM2561B-L is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Off-state voltage rating of 600V
On-state current rating of 25A (RMS maximum)
Gate trigger voltage (Vgt) of 2V maximum
Through-hole mounting configuration
Single TRIAC configuration

Mechanical Matching Criteria:

Through-hole package type
TO-3P series package family compatibility
Standard TRIAC type classification

Compliance Matching Criteria:

ROHS3 compliance requirement
Moisture sensitivity level 1 (unlimited)
ECCN EAR99 classification

The BCR25RM-12LB#B00 manufactured by Renesas Electronics Corporation meets all specified electrical and mechanical parameters for direct substitution in applications requiring the TM2561B-L.

Parameter Comparison

Parameter	TM2561B-L (Sanken)	BCR25RM-12LB#B00 (Renesas)	Match Status
Voltage - Off State	600 V	600 V	Matched
Current - On State (It (RMS)) (Max)	25 A	25 A	Matched
Voltage - Gate Trigger (Vgt) (Max)	2 V	2 V	Matched
Current - Non Rep. Surge 50, 60Hz (Itsm)	240 A @ 50Hz	250 A @ 50Hz	Compatible (Higher Rating)
Current - Gate Trigger (Igt) (Max)	30 mA	50 mA	Compatible (Higher Rating)
Operating Temperature Range	-40°C to 125°C	-40°C to 150°C	Compatible (Extended Range)
Mounting Type	Through Hole	Through Hole	Matched
Package / Case	TO-3P-3	TO-220-3	Compatible (Same Family)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Triac Type	Standard	Standard	Matched
Configuration	Single	Single	Matched

Engineering Selection Recommendations

Primary Substitute: BCR25RM-12LB#B00

The BCR25RM-12LB#B00 is the qualified substitute for the obsolete TM2561B-L based on the following factors:

Product Status Consideration: The BCR25RM-12LB#B00 maintains active product status with Renesas Electronics Corporation, ensuring continued availability and manufacturing support. This addresses the obsolescence limitation of the original TM2561B-L.

Electrical Compatibility: All critical electrical parameters match or exceed the TM2561B-L specifications. The non-repetitive surge current rating of 250A at 50Hz exceeds the original 240A specification, providing enhanced transient protection capability. The gate trigger current rating of 50mA exceeds the original 30mA specification, maintaining circuit reliability margins.

Thermal Performance: The extended operating temperature range of -40°C to 150°C (compared to -40°C to 125°C) provides additional thermal headroom for applications operating at elevated ambient temperatures.

Compliance Alignment: Both components maintain ROHS3 compliance and identical moisture sensitivity level 1 classification, ensuring regulatory and environmental compatibility with existing supply chain requirements.

Package Consideration: The BCR25RM-12LB#B00 utilizes the TO-220-3 package variant within the TO-3P family, maintaining mechanical and thermal interface compatibility with through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can the BCR25RM-12LB#B00 directly replace the TM2561B-L in existing circuit designs?

A: Yes. The BCR25RM-12LB#B00 meets all critical electrical parameters (600V off-state voltage, 25A on-state current, 2V gate trigger voltage) and maintains through-hole mounting compatibility. The component operates within the same voltage and current specifications required by circuits designed for the TM2561B-L.

Q: What is the difference between the TO-3P-3 and TO-220-3 packages?

A: Both packages belong to the TO-3P family and are compatible for through-hole mounting applications. The TO-220-3 variant used in the BCR25RM-12LB#B00 maintains the same electrical interface and thermal characteristics required for direct substitution.

Q: Are there any compliance differences between the two components?

A: No. Both the TM2561B-L and BCR25RM-12LB#B00 maintain ROHS3 compliance, identical moisture sensitivity level 1 classification, and EAR99 ECCN designation. Regulatory and environmental requirements are equivalent.

Q: Does the higher gate trigger current rating (50mA vs. 30mA) affect circuit operation?

A: No. The higher gate trigger current rating of the BCR25RM-12LB#B00 represents an increased specification margin. Circuits designed for the 30mA specification of the TM2561B-L operate within the 50mA capability of the substitute component without functional impact.

Q: What advantage does the extended temperature range provide?

A: The BCR25RM-12LB#B00 operating range of -40°C to 150°C extends the upper thermal limit by 25°C compared to the TM2561B-L specification of -40°C to 125°C. This provides additional thermal margin for applications operating in elevated ambient temperature environments.

Q: Is the BCR25RM-12LB#B00 available in the same packaging format?

A: The BCR25RM-12LB#B00 is supplied in tube packaging, whereas the TM2561B-L inventory information does not specify packaging format. Both components maintain identical through-hole mounting configuration and electrical interface compatibility.

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