CS220-16D Equivalent & Substitute Parts

Part Overview

The CS220-16D is a 400V 16A SCR (Silicon Controlled Rectifier) in TO-220-3 package manufactured by Central Semiconductor Corp. This thyristor is designed for standard recovery applications requiring through-hole mounting. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Voltage - Off State	400 V
Current - On State (It (RMS)) (Max)	16 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 Range	-40°C ~ 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the CS220-16D is determined by the following critical parameters:

Voltage Rating (Off State): Must be 400V or higher to maintain blocking capability
Current Rating (On State RMS): The substitute must support the required current level for the application
Gate Trigger Characteristics: Vgt and Igt must be compatible with existing gate drive circuitry
On-State Voltage Drop: Vtm affects power dissipation and thermal performance
Hold Current: Determines minimum latching current requirements
SCR Type: Standard Recovery type ensures consistent switching behavior
Package Compatibility: TO-220-3 or TO-220AB-L packages are mechanically and electrically compatible for through-hole applications
Temperature Range: Operating range must encompass -40°C to 125°C

The S4010LTP from Littelfuse Inc. meets these substitution criteria with matching voltage ratings, gate trigger specifications, on-state voltage characteristics, and temperature range. Current rating differences are addressed through application-specific circuit design considerations.

Parameter Comparison

Parameter	CS220-16D (Central Semiconductor)	S4010LTP (Littelfuse)
Voltage - Off State	400 V	400 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.5 V
Current - Gate Trigger (Igt) (Max)	15 mA	15 mA
Voltage - On State (Vtm) (Max)	1.6 V	1.6 V
Current - On State (It (RMS)) (Max)	16 A	10 A
Current - Hold (Ih) (Max)	20 mA	30 mA
SCR Type	Standard Recovery	Standard Recovery
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-220-3	TO-220-3 Isolated Tab
Product Status	Obsolete	Active

Engineering Selection Recommendations

The S4010LTP is an active product from Littelfuse Inc. with full RoHS3 compliance and REACH unaffected status, providing long-term availability and regulatory compliance advantages over the obsolete CS220-16D. Both devices share identical voltage ratings, gate trigger specifications, and on-state voltage characteristics, ensuring compatibility with existing gate drive circuits and thermal management designs.

The primary design consideration is the current rating difference: the S4010LTP is rated for 10A RMS versus the CS220-16D's 16A RMS. Circuit analysis must confirm that the application's actual current requirements do not exceed the S4010LTP's 10A rating. The S4010LTP's higher hold current (30mA vs. 20mA) requires verification against minimum gate drive current availability.

The TO-220AB-L package variant of the S4010LTP provides isolated tab construction, which may require evaluation for thermal and electrical isolation requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the S4010LTP directly replace the CS220-16D without circuit modifications?

A: Direct replacement is possible only if the application's continuous current requirement does not exceed 10A RMS. The matching voltage ratings, gate trigger specifications, and on-state voltage characteristics ensure electrical compatibility. Physical mounting compatibility exists for TO-220-3 footprints, though the isolated tab variant may require thermal interface evaluation.

Q: What is the significance of the current rating difference between these devices?

A: The CS220-16D supports 16A RMS while the S4010LTP supports 10A RMS. This difference directly impacts maximum continuous current handling. Applications operating above 10A RMS require alternative solutions or circuit redesign to reduce current demands.

Q: How do the hold current specifications affect substitution?

A: The S4010LTP requires 30mA hold current versus the CS220-16D's 20mA. Gate drive circuits must supply sufficient current to maintain device latching. Existing circuits designed for 20mA minimum may require adjustment to ensure reliable operation at 30mA.

Q: Are there package compatibility concerns between TO-220-3 and TO-220AB-L?

A: Both packages are through-hole TO-220 variants with identical pin spacing and footprint compatibility. The isolated tab variant (AB-L) provides electrical isolation of the mounting tab, which may be beneficial or required depending on thermal management and electrical isolation requirements in the target circuit.

Q: What compliance advantages does the S4010LTP offer?

A: The S4010LTP is RoHS3 compliant and carries active product status from Littelfuse, ensuring long-term availability and regulatory compliance. The obsolete CS220-16D lacks these assurances for future procurement and regulatory requirements.

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