CSDD-12N TR13 Equivalent & Substitute Parts

Part Overview

The CSDD-12N TR13 is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 800V off-state voltage with 12A RMS on-state current capability in a surface mount D2PAK package. Manufactured by Central Semiconductor Corp, this component is classified as obsolete. Due to its obsolete status and limited availability in new production, identifying functionally equivalent substitute components is necessary for design continuity and procurement planning.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	800	V
Current - On State (It (RMS)) (Max)	12	A
Voltage - Gate Trigger (Vgt) (Max)	1.5	V
Current - Gate Trigger (Igt) (Max)	15	mA
Voltage - On State (Vtm) (Max)	1.6	V
Current - Hold (Ih) (Max)	20	mA
Current - Off State (Max)	10	µA
Operating Temperature Range	-40 to 125	°C (TJ)
Package / Case	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	-
SCR Type	Sensitive Gate	-

Substitute Part Grouping Explanation

Substitution of the CSDD-12N TR13 is based on the following critical parameters:

Voltage Rating (Off-State): 800V minimum to maintain voltage withstand capability
Current Rating (On-State RMS): Minimum 12A to support the original design current requirements
Gate Trigger Characteristics: Vgt ≤ 1.5V and Igt ≤ 15mA to ensure gate drive compatibility
Package Compatibility: D2PAK surface mount package with identical pinout and thermal characteristics
Operating Temperature Range: Support for -40°C to 125°C junction temperature
Device Type: Thyristor family (SCR or TRIAC) with equivalent switching behavior

The BT139B-800F,118 qualifies as a substitute based on these parameters. Although it is a TRIAC rather than an SCR, it meets or exceeds all critical electrical specifications and shares the same D2PAK package footprint.

Parameter Comparison

Parameter	CSDD-12N TR13	BT139B-800F,118	Unit
Voltage - Off State	800	800	V
Current - On State (It (RMS)) (Max)	12	16	A
Voltage - Gate Trigger (Vgt) (Max)	1.5	1.5	V
Current - Gate Trigger (Igt) (Max)	15	25	mA
Current - Hold (Ih) (Max)	20	45	mA
Current - Off State (Max)	10	-	µA
Operating Temperature (Max)	125	125	°C (TJ)
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	-
Mounting Type	Surface Mount	Surface Mount	-
Product Status	Obsolete	Active	-
RoHS Status	-	RoHS Compliant	-

Engineering Selection Recommendations

The BT139B-800F,118 from WeEn Semiconductors is suitable as a substitute for the obsolete CSDD-12N TR13 based on the following factors:

Electrical Compatibility: The substitute meets or exceeds all critical voltage and current parameters. The 800V off-state voltage rating is identical, and the 16A RMS on-state current exceeds the original 12A requirement, providing design margin.
Gate Drive Compatibility: Gate trigger voltage and current specifications are matched or exceeded, ensuring existing gate drive circuits will function without modification.
Package Equivalence: Both components use the TO-263-3 D2PAK surface mount package with identical pinout and thermal interface, allowing direct PCB footprint compatibility.
Product Status and Compliance: The BT139B-800F,118 is in active production with RoHS compliance certification, ensuring long-term availability and regulatory alignment.
Temperature Rating: Both components support the same -40°C to 125°C operating range, maintaining thermal design margins.

Frequently Asked Questions (FAQ)

Q: Can the BT139B-800F,118 TRIAC directly replace the CSDD-12N TR13 SCR?

A: Yes, within the electrical parameters specified. The TRIAC provides bidirectional switching capability compared to the unidirectional SCR. For applications requiring unidirectional switching only, the TRIAC will function correctly as it can be gated in one direction. Circuit validation is necessary to confirm application-specific compatibility.

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

A: No. Both components use the TO-263-3 D2PAK package with identical pinout (2 leads + tab). PCB footprints are directly compatible without modification.

Q: What is the current rating difference, and does it affect design?

A: The BT139B-800F,118 is rated for 16A RMS compared to the original 12A RMS. This higher rating provides additional design margin and does not negatively impact the circuit. Thermal management should be verified for the specific application.

Q: Is the gate drive circuit compatible?

A: Yes. The gate trigger voltage (Vgt) and current (Igt) specifications are identical or exceeded by the substitute. Existing gate drive circuits will operate without modification.

Q: What is the availability status of each component?

A: The CSDD-12N TR13 is obsolete with limited stock. The BT139B-800F,118 is in active production, ensuring reliable long-term procurement and supply chain continuity.

Q: Are there compliance or regulatory differences?

A: The BT139B-800F,118 carries RoHS compliance certification. Verify that your application requirements align with this compliance status.

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