CQ220-25D Equivalent & Substitute Parts

Part Overview

The CQ220-25D is an internally triggered TRIAC manufactured by Central Semiconductor Corp, rated for 400 V off-state voltage and 25 A on-state current in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support. The internally triggered configuration and 25 A current rating define the primary functional requirements for identifying compatible alternatives.

Key Parameters

Parameter	CQ220-25D
Voltage - Off State	400 V
Current - On State (It (RMS)) (Max)	25 A
Voltage - Gate Trigger (Vgt) (Max)	2.5 V
Current - Gate Trigger (Igt) (Max)	60 mA
Current - Hold (Ih) (Max)	50 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Configuration	Single

Substitute Part Grouping Explanation

Substitution eligibility for the CQ220-25D is determined by the following critical parameters:

Voltage - Off State: Must be 400 V or greater to maintain voltage margin
Current - On State (It (RMS)) (Max): Must be 25 A or greater to support the design current requirement
Mounting Type: Must be through-hole to ensure PCB compatibility
Package / Case: Must be TO-220-3 or compatible TO-220AB variant for mechanical fit
Operating Temperature Range: Must support -40°C ~ 125°C minimum
Configuration: Must be single TRIAC configuration

The substitute parts MAC16DG, MAC16HCDG, and Q4025RH5TP meet the voltage and temperature requirements. However, MAC16DG and MAC16HCDG are rated at 16 A maximum on-state current, which is below the 25 A requirement of the original part. Q4025RH5TP maintains the 25 A current rating and is therefore the primary functional equivalent.

Parameter Comparison

Parameter	CQ220-25D	MAC16DG	MAC16HCDG	Q4025RH5TP
Manufacturer	Central Semiconductor Corp	onsemi	onsemi	Littelfuse Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Off State	400 V	400 V	400 V	400 V
Current - On State (It (RMS)) (Max)	25 A	16 A	16 A	25 A
Voltage - Gate Trigger (Vgt) (Max)	2.5 V	1.5 V	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	60 mA	50 mA	50 mA	50 mA
Current - Hold (Ih) (Max)	50 mA	50 mA	50 mA	50 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Configuration	Single	Single	Single	Single

Engineering Selection Recommendations

Q4025RH5TP is the primary substitute for the CQ220-25D. This part maintains the 25 A on-state current rating, matching the original design specification. The Q4025RH5TP is manufactured by Littelfuse Inc., an active product with ROHS3 compliance and REACH unaffected status. The lower gate trigger voltage (1.3 V vs. 2.5 V) provides improved gate sensitivity. Current inventory of 1,062 units supports production requirements.

MAC16DG and MAC16HCDG are secondary alternatives only for applications where the on-state current requirement can be reduced to 16 A or lower. Both parts are manufactured by onsemi with active product status. MAC16DG offers 9,073 units in stock, while MAC16HCDG provides 3,133 units. These parts feature lower gate trigger voltage (1.5 V) compared to the original specification.

Frequently Asked Questions (FAQ)

Q: Can MAC16DG or MAC16HCDG be used as direct replacements for CQ220-25D?

A: MAC16DG and MAC16HCDG are not direct replacements due to reduced on-state current rating (16 A vs. 25 A). These parts are suitable only for applications where the design current does not exceed 16 A RMS.

Q: Is Q4025RH5TP a direct functional equivalent?

A: Q4025RH5TP is the closest functional equivalent, maintaining the 400 V voltage rating and 25 A on-state current specification. The TO-220-3 package ensures mechanical compatibility with existing PCB layouts.

Q: What is the difference between the Triac Type designations?

A: The CQ220-25D is internally triggered, while MAC16DG and MAC16HCDG are standard TRIACs. Q4025RH5TP is an Alternistor snubberless TRIAC. These designations reflect internal circuit architecture but do not prevent functional substitution when electrical parameters align.

Q: Are there inventory considerations for production?

A: Q4025RH5TP has 1,062 units available. MAC16DG offers significantly higher inventory at 9,073 units, suitable for high-volume applications where current rating reduction is acceptable.

Q: Do all substitute parts support the same operating temperature range?

A: All substitute parts support the -40°C ~ 125°C operating temperature range, matching the original CQ220-25D specification.

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