CS220-25M Equivalent & Substitute Parts

Part Overview

The CS220-25M is a 600V 25A standard recovery SCR (silicon-controlled rectifier) in TO-220-3 through-hole packaging manufactured by Central Semiconductor Corp. This thyristor is designed for AC switching and control applications requiring high voltage and moderate current handling. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system support and maintenance.

Key Parameters

Parameter	CS220-25M
Voltage - Off State	600 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V
Current - Gate Trigger (Igt) (Max)	30 mA
Voltage - On State (Vtm) (Max)	1.8 V
Current - On State (It (RMS)) (Max)	25 A
Current - Hold (Ih) (Max)	50 mA
SCR Type	Standard Recovery
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-220-3

Substitute Part Grouping Explanation

Substitution of the CS220-25M is determined by the following critical parameters:

Voltage Rating (Off State): 600 V minimum required
Current Rating (RMS): 25 A minimum required
Gate Trigger Characteristics: Vgt ≤ 1.5 V and Igt ≤ 30 mA
On-State Voltage: Vtm ≤ 1.8 V
Hold Current: Ih ≤ 50 mA
SCR Type: Standard Recovery
Package: TO-220-3 through-hole configuration
Temperature Range: -40°C ~ 125°C

The 2N6508G meets all these electrical and mechanical requirements, making it a direct functional equivalent for the obsolete CS220-25M.

Parameter Comparison

Parameter	CS220-25M	2N6508G
Manufacturer	Central Semiconductor Corp	Littelfuse Inc.
Product Status	Obsolete	Active
Voltage - Off State	600 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.5 V
Current - Gate Trigger (Igt) (Max)	30 mA	30 mA
Voltage - On State (Vtm) (Max)	1.8 V	1.8 V
Current - On State (It (RMS)) (Max)	25 A	25 A
Current - Hold (Ih) (Max)	50 mA	40 mA
SCR Type	Standard Recovery	Standard Recovery
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3

Engineering Selection Recommendations

The 2N6508G is the recommended substitute for the obsolete CS220-25M. Both devices share identical electrical specifications across all critical parameters: 600V off-state voltage, 25A RMS current rating, 1.5V gate trigger voltage, and 1.8V on-state voltage. The 2N6508G maintains the same TO-220-3 through-hole package and operating temperature range.

The 2N6508G holds active product status from Littelfuse Inc., ensuring ongoing availability and manufacturing support. The device is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements. The hold current specification of the 2N6508G (40 mA maximum) is more stringent than the CS220-25M (50 mA maximum), providing improved performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 2N6508G directly replace the CS220-25M in existing designs?

A: Yes. The 2N6508G meets or exceeds all electrical specifications of the CS220-25M, including voltage ratings, current ratings, and gate trigger characteristics. The identical TO-220-3 package ensures mechanical compatibility without PCB modifications.

Q: What is the difference between the CS220-25M and 2N6508G?

A: The primary difference is product status: the CS220-25M is obsolete while the 2N6508G is active. Electrically, both devices are equivalent. The 2N6508G has a lower hold current specification (40 mA vs. 50 mA), which represents improved performance.

Q: Are there any package differences between these parts?

A: Both parts use the TO-220-3 through-hole package. The 2N6508G is supplied in tube packaging, while the CS220-25M packaging format is not specified. This does not affect electrical or mechanical compatibility.

Q: What certifications does the 2N6508G carry?

A: The 2N6508G is RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards applicable to electronic components.

Q: Is the 2N6508G suitable for the same temperature range as the CS220-25M?

A: Yes. Both devices operate across the identical temperature range of -40°C to 125°C, ensuring compatibility in thermal environments.

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