CS220-16B Equivalent & Substitute Parts

Part Overview

The CS220-16B is a Silicon Controlled Rectifier (SCR) rated for 200V off-state voltage and 16A on-state current in a TO-220-3 through-hole package, manufactured by Central Semiconductor Corp. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates across a temperature range of -40°C to 125°C and features standard recovery characteristics typical of general-purpose thyristor applications.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	200	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	-40 to 125	°C
Package / Case	TO-220-3	-
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

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

Voltage Rating (Off State): Must match or exceed 200V to maintain blocking capability
Current Rating (On State): The substitute must support the required on-state current for the application
Gate Trigger Parameters: Vgt and Igt must be compatible with existing gate drive circuitry
On-State Voltage Drop: Vtm affects power dissipation and thermal performance
Hold Current: Ih determines minimum holding current for latching behavior
Package and Mounting: TO-220-3 through-hole configuration is required for mechanical compatibility
SCR Type: Standard Recovery classification ensures switching characteristics align with the original design
Temperature Range: Operating range of -40°C to 125°C must be maintained

The MCR218-4G from onsemi meets the voltage and package requirements but operates at a reduced on-state current rating of 8A compared to the original 16A specification.

Parameter Comparison

Parameter	CS220-16B (Original)	MCR218-4G (Substitute)	Unit
Manufacturer	Central Semiconductor Corp	onsemi	-
Product Status	Obsolete	Active	-
Voltage - Off State	200	200	V
Voltage - Gate Trigger (Vgt) (Max)	1.5	1.5	V
Current - Gate Trigger (Igt) (Max)	15	25	mA
Voltage - On State (Vtm) (Max)	1.6	1.8	V
Current - On State (It (RMS)) (Max)	16	8	A
Current - Hold (Ih) (Max)	20	30	mA
Current - Off State (Max)	-	10	µA
SCR Type	Standard Recovery	Standard Recovery	-
Operating Temperature	-40 to 125	-40 to 125	°C
Package / Case	TO-220-3	TO-220-3	-
Mounting Type	Through Hole	Through Hole	-

Engineering Selection Recommendations

The MCR218-4G represents the available substitute for the obsolete CS220-16B. Both devices share identical voltage ratings (200V off-state), gate trigger voltage specifications (1.5V maximum), SCR type classification (Standard Recovery), operating temperature range (-40°C to 125°C), and TO-220-3 package configuration.

The primary distinction is the on-state current rating: the MCR218-4G is rated for 8A maximum compared to the original 16A specification. This reduced current capacity requires evaluation against actual circuit load requirements. If the application demands the full 16A capability, the MCR218-4G cannot serve as a direct substitute.

The MCR218-4G carries active product status from onsemi, ensuring ongoing availability and manufacturing support. Both parts share identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications, confirming regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can the MCR218-4G directly replace the CS220-16B in all applications?

A: Direct substitution is valid only for applications where the circuit load current does not exceed 8A RMS. The MCR218-4G is rated for 8A on-state current, while the original CS220-16B is rated for 16A. If your circuit requires the full 16A capability, this substitute is not suitable.

Q: Are the gate drive requirements identical between these parts?

A: Gate trigger voltage (Vgt) is identical at 1.5V maximum for both parts. However, gate trigger current (Igt) differs: the CS220-16B specifies 15mA maximum while the MCR218-4G specifies 25mA maximum. Existing gate drive circuits designed for the original part will function with the substitute, though the MCR218-4G may require slightly higher gate current for reliable triggering.

Q: Do both parts use the same package?

A: Yes. Both the CS220-16B and MCR218-4G use the TO-220-3 through-hole package, ensuring mechanical and thermal interface compatibility on existing PCBs.

Q: What is the significance of the on-state voltage difference?

A: The CS220-16B specifies Vtm (on-state voltage) at 1.6V maximum, while the MCR218-4G specifies 1.8V maximum. This 0.2V difference results in slightly higher power dissipation in the MCR218-4G during conduction. Thermal design calculations should account for this increased voltage drop.

Q: Are there compliance or regulatory differences?

A: Both parts share identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications. No regulatory or compliance barriers exist for substitution from this perspective.

Q: Why is the CS220-16B obsolete?

A: The CS220-16B is classified as obsolete by its original manufacturer. The MCR218-4G from onsemi maintains active product status, ensuring continued manufacturing and supply chain availability for new designs and legacy system support.

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