CS220-12D Equivalent & Substitute Parts

Part Overview

The CS220-12D is a 400V 12A Standard Recovery SCR (Silicon Controlled Rectifier) in TO-220-3 package manufactured by Central Semiconductor Corp. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The CS220-12D serves as a thyristor for AC power control applications requiring 400V blocking voltage and 12A RMS current capability.

Key Parameters

Parameter	Value
Voltage - Off State	400 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
SCR Type	Standard Recovery
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the CS220-12D is determined by the following critical parameters:

Voltage - Off State: 400 V (exact match required)
Current - On State (It (RMS)): 12 A minimum
SCR Type: Standard Recovery
Package / Case: TO-220-3 compatible
Operating Temperature Range: -40°C ~ 125°C (minimum)

The identified substitute parts meet these core electrical and mechanical requirements. Substitutes are grouped based on current rating capability and package configuration compatibility within the TO-220 family.

Parameter Comparison

Parameter	CS220-12D	S4010LTP	S4012R
Manufacturer	Central Semiconductor Corp	Littelfuse Inc.	Littelfuse
Voltage - Off State	400 V	400 V	400 V
Current - On State (It (RMS)) (Max)	12 A	10 A	12 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.5 V	1.5 V
Current - Gate Trigger (Igt) (Max)	15 mA	15 mA	20 mA
Voltage - On State (Vtm) (Max)	1.6 V	1.6 V	1.6 V
Current - Hold (Ih) (Max)	20 mA	30 mA	40 mA
SCR Type	Standard Recovery	Standard Recovery	Standard Recovery
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-220-3	TO-220-3 Isolated Tab	TO-220-3
Product Status	Obsolete	Active	Discontinued at DiGi Electronics

Engineering Selection Recommendations

S4012R is the primary substitute for CS220-12D. Both components share identical 400V blocking voltage, 12A RMS current rating, 1.5V gate trigger voltage, and 1.6V on-state voltage. The S4012R maintains full electrical compatibility with the original part and is RoHS3 compliant. However, S4012R is discontinued at DiGi Electronics, limiting long-term availability.

S4010LTP is an alternative substitute with active product status from Littelfuse Inc. This part maintains 400V blocking voltage and identical gate trigger specifications. The primary difference is reduced RMS current rating of 10A versus the 12A requirement of CS220-12D. S4010LTP is suitable only for applications where the 10A RMS current rating is sufficient. The S4010LTP features an isolated tab configuration (TO-220AB-L) and is RoHS3 compliant with unlimited moisture sensitivity level.

For new designs requiring full 12A RMS capability with active product availability, neither substitute provides optimal long-term support. S4012R matches electrical specifications but faces discontinuation. S4010LTP offers active status but reduced current capacity.

Frequently Asked Questions (FAQ)

Q: Can S4010LTP directly replace CS220-12D in all applications?

A: S4010LTP is electrically compatible for gate trigger and blocking voltage specifications. However, the 10A RMS current rating is lower than the CS220-12D 12A rating. Direct substitution is valid only if the application current requirement does not exceed 10A RMS.

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

A: Both are TO-220 family packages with three leads. TO-220AB-L (S4010LTP) features an isolated tab configuration, while standard TO-220-3 (CS220-12D, S4012R) may have different tab isolation characteristics. Mechanical fit is compatible, but thermal and isolation properties may differ depending on application requirements.

Q: Are the substitute parts RoHS compliant?

A: S4010LTP is RoHS3 compliant. S4012R is RoHS3 compliant. Both meet current environmental compliance standards.

Q: What is the availability status of substitute parts?

A: S4010LTP has active product status with 2173 pieces in stock. S4012R is discontinued at DiGi Electronics with 1056 pieces in stock. For new production, S4010LTP offers better long-term availability, subject to current rating limitations.

Q: Do the substitute parts have the same operating temperature range?

A: Yes. Both S4010LTP and S4012R operate across -40°C to 125°C, matching the CS220-12D specification.

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