CSDD-25M TR13 Equivalent & Substitute Parts

Part Overview

The CSDD-25M TR13 is a Silicon Controlled Rectifier (SCR) rated for 600V off-state voltage and 25A RMS on-state current in a surface mount D2PAK package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while accommodating the same or compatible package footprints.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	600	V
Current - On State (It (RMS)) (Max)	25	A
Voltage - Gate Trigger (Vgt) (Max)	1.5	V
Current - Gate Trigger (Igt) (Max)	30	mA
Voltage - On State (Vtm) (Max)	1.8	V
Current - Hold (Ih) (Max)	50	mA
Operating Temperature Range	-40 to 125	°C (TJ)
Package / Case	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the CSDD-25M TR13 is based on the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: Off-state voltage must equal or exceed 600V to maintain blocking capability in the application circuit.

Current Rating Compatibility: On-state RMS current rating must meet or exceed 25A to handle the design load without thermal stress.

Gate Trigger Parameters: Gate trigger voltage (Vgt) and gate trigger current (Igt) must remain within acceptable ranges to ensure reliable gate drive compatibility with existing control circuitry.

Thermal Operating Range: The substitute must support the operating temperature range of -40°C to 125°C minimum to function across the intended application environment.

Package Compatibility: Surface mount D2PAK (TO-263-3) package ensures mechanical and electrical compatibility with existing PCB layouts and assembly processes.

The identified substitute QJ6025NH5RP meets these criteria as a TRIAC device with equivalent voltage and current ratings, compatible package, and active product status.

Parameter Comparison

Parameter	CSDD-25M TR13 (Main Part)	QJ6025NH5RP (Substitute)	Compatibility
Voltage - Off State	600 V	600 V	Equal
Current - On State (It (RMS)) (Max)	25 A	25 A	Equal
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.3 V	Compatible (lower trigger voltage)
Current - Gate Trigger (Igt) (Max)	30 mA	50 mA	Compatible (higher gate current tolerance)
Current - Hold (Ih) (Max)	50 mA	50 mA	Equal
Operating Temperature Range	-40 to 125 °C (TJ)	-40 to 150 °C (TJ)	Compatible (extended upper range)
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	Equal
Mounting Type	Surface Mount	Surface Mount	Equal
Product Status	Obsolete	Active	Substitute is actively manufactured
RoHS Status	Not specified	ROHS3 Compliant	Substitute meets modern compliance

Engineering Selection Recommendations

The QJ6025NH5RP from Littelfuse Inc. is a direct functional substitute for the obsolete CSDD-25M TR13. Selection is based on the following engineering criteria:

Electrical Equivalence: Both devices share identical 600V off-state voltage and 25A RMS on-state current ratings, ensuring equivalent power handling in the application circuit.

Package Compatibility: Both components use the TO-263-3 D2PAK surface mount package, permitting direct PCB layout reuse without redesign.

Active Product Status: The QJ6025NH5RP is actively manufactured and stocked, eliminating supply chain risk associated with the obsolete CSDD-25M TR13.

Regulatory Compliance: The QJ6025NH5RP carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for new designs and production runs.

Thermal Performance: The extended operating temperature range of -40°C to 150°C (versus -40°C to 125°C for the original) provides additional thermal margin in demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the QJ6025NH5RP be used as a direct replacement for CSDD-25M TR13 in existing designs?

A: Yes. Both devices share identical voltage and current ratings, the same D2PAK surface mount package, and compatible gate trigger characteristics. No circuit modifications are required for substitution.

Q: What is the functional difference between an SCR and a TRIAC?

A: The CSDD-25M TR13 is an SCR (Silicon Controlled Rectifier), which conducts in one direction. The QJ6025NH5RP is a TRIAC (Triode for Alternating Current), which conducts in both directions. Application circuit topology determines which device type is appropriate. Verify that your circuit design supports bidirectional conduction before substituting a TRIAC for an SCR.

Q: Are there any gate drive differences between these parts?

A: The QJ6025NH5RP has a lower gate trigger voltage (1.3V versus 1.5V) and higher gate trigger current tolerance (50mA versus 30mA). These differences are compatible with standard gate drive circuits designed for the original part. No gate drive circuit modifications are necessary.

Q: Does the extended temperature range of the QJ6025NH5RP affect compatibility?

A: No. The extended upper operating temperature limit (150°C versus 125°C) provides additional thermal margin and does not reduce compatibility. The lower temperature limit remains -40°C for both devices.

Q: Is the QJ6025NH5RP available in the same packaging format?

A: Yes. Both the CSDD-25M TR13 and QJ6025NH5RP use the TO-263-3 D2PAK surface mount package with identical pinout and footprint. PCB assembly processes require no modification.

Q: What compliance certifications does the substitute part carry?

A: The QJ6025NH5RP is ROHS3 compliant and REACH unaffected. Both devices carry EAR99 ECCN classification and 8541.30.0080 HTSUS code.

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