CQ220-12D Equivalent & Substitute Parts

Part Overview

The CQ220-12D is an internally triggered TRIAC rated for 400 V off-state voltage and 12 A on-state current in a TO-220-3 through-hole package. Manufactured by Central Semiconductor Corp, this component is classified as obsolete. Due to its obsolete status and limited ongoing availability from the original manufacturer, identifying equivalent substitute parts with matching or compatible electrical and mechanical specifications is necessary for design continuity and procurement flexibility.

Key Parameters

Parameter	CQ220-12D
Voltage - Off State	400 V
Current - On State (It (RMS)) (Max)	12 A
Voltage - Gate Trigger (Vgt) (Max)	2.5 V
Current - Gate Trigger (Igt) (Max)	50 mA
Current - Hold (Ih) (Max)	25 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CQ220-12D is determined by the following critical parameters:

Voltage - Off State: Must be 400 V or greater
Current - On State (It (RMS)) (Max): Must be 12 A or greater to maintain load capacity
Package / Case: Must be TO-220-3 or compatible TO-220 variant for mechanical fit
Operating Temperature Range: Must support -40°C ~ 125°C (TJ)
Mounting Type: Must be Through Hole

The CQ220-12D is an internally triggered TRIAC. Substitute parts identified are standard TRIACs that meet or exceed the electrical ratings and package requirements. Standard TRIACs are functionally compatible in applications where the internal trigger mechanism of the original part is not a design-critical requirement.

Parameter Comparison

Parameter	CQ220-12D	BTA08-400CRG	MAC12DG
Manufacturer	Central Semiconductor Corp	STMicroelectronics	Littelfuse Inc.
Voltage - Off State	400 V	400 V	400 V
Current - On State (It (RMS)) (Max)	12 A	8 A	12 A
Voltage - Gate Trigger (Vgt) (Max)	2.5 V	1.3 V	1.5 V
Current - Gate Trigger (Igt) (Max)	50 mA	25 mA	35 mA
Current - Hold (Ih) (Max)	25 mA	25 mA	40 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

MAC12DG (Littelfuse Inc.) is the primary substitute for the CQ220-12D. It matches the on-state current rating of 12 A, maintains the 400 V off-state voltage specification, and is housed in the compatible TO-220-3 package. The MAC12DG is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability.

BTA08-400CRG (STMicroelectronics) is a secondary substitute option. While it meets the 400 V voltage requirement and TO-220-3 package specification, its on-state current rating is limited to 8 A, which is below the 12 A requirement of the original part. This substitute is suitable only for applications where the load current does not exceed 8 A. The BTA08-400CRG is ROHS3 compliant and maintains active product status.

Both substitute parts support the full operating temperature range of -40°C ~ 125°C (TJ) and are classified as REACH Unaffected with ECCN EAR99 designation, matching the compliance profile of the original CQ220-12D.

Frequently Asked Questions (FAQ)

Q: Can the BTA08-400CRG replace the CQ220-12D in all applications?

A: No. The BTA08-400CRG is rated for 8 A on-state current, while the CQ220-12D is rated for 12 A. The BTA08-400CRG is suitable only for applications where the maximum load current does not exceed 8 A. For applications requiring the full 12 A capacity, the MAC12DG is the appropriate substitute.

Q: Are the substitute parts pin-compatible with the CQ220-12D?

A: Yes. Both the MAC12DG and BTA08-400CRG use the TO-220-3 package, which provides mechanical and pin compatibility with the CQ220-12D. No PCB modifications are required for physical installation.

Q: What is the difference between an internally triggered TRIAC and a standard TRIAC?

A: The CQ220-12D features internal trigger circuitry, while the MAC12DG and BTA08-400CRG are standard TRIACs without internal triggering. In most applications, standard TRIACs function identically. Applications that specifically depend on the internal trigger mechanism of the original part require design review.

Q: Do the substitute parts meet the same compliance standards as the CQ220-12D?

A: Yes. Both the MAC12DG and BTA08-400CRG are ROHS3 compliant, REACH Unaffected, and carry the same ECCN EAR99 classification as the original CQ220-12D.

Q: What is the operating temperature range for the substitute parts?

A: Both substitute parts support the full operating temperature range of -40°C ~ 125°C (TJ), matching the CQ220-12D specification.

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