CS220-8N Equivalent & Substitute Parts

Part Overview

The CS220-8N is an 800V 8A 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 phase control applications requiring high voltage blocking capability and moderate current handling. The part is currently obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.

Key Parameters

Parameter	CS220-8N
Voltage - Off State	800 V
Voltage - Gate Trigger (Vgt) (Max)	1.5 V
Current - Gate Trigger (Igt) (Max)	15 mA
Voltage - On State (Vtm) (Max)	1.8 V
Current - On State (It (RMS)) (Max)	8 A
Current - Hold (Ih) (Max)	20 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	60 A @ 50Hz
SCR Type	Standard Recovery
Operating Temperature Range	-40°C to 125°C
Mounting Type	Through Hole
Package / Case	TO-220-3

Substitute Part Grouping Explanation

Substitution of the CS220-8N requires matching the following critical electrical and mechanical parameters:

Voltage Rating: Off-state voltage must be 800V to maintain blocking capability in the same circuit topology
Gate Trigger Characteristics: Vgt (Max) of 1.5V and Igt (Max) of 15mA define gate drive requirements
On-State Performance: Vtm (Max) of 1.8V and thermal dissipation capability
Current Handling: RMS current rating of 8A and surge current capability
Recovery Type: Standard recovery classification for AC switching applications
Package Compatibility: TO-220-3 through-hole mounting for direct PCB substitution
Temperature Range: -40°C to 125°C operating window

The TYN804RG from STMicroelectronics meets the voltage, gate trigger, on-state voltage, package, temperature range, and SCR type requirements. However, the on-state RMS current rating is 4A, which is lower than the 8A specification of the CS220-8N. This difference must be evaluated against actual circuit current demands.

Parameter Comparison

Parameter	CS220-8N (Central Semiconductor)	TYN804RG (STMicroelectronics)
Voltage - Off State	800 V	800 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)	1.8 V	1.8 V
Current - On State (It (RMS)) (Max)	8 A	4 A
Current - Hold (Ih) (Max)	20 mA	30 mA
SCR Type	Standard Recovery	Standard Recovery
Operating Temperature Range	-40°C to 125°C	-40°C to 125°C
Mounting Type	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3
Product Status	Obsolete	Active

Engineering Selection Recommendations

The TYN804RG is an active product from a major manufacturer with ROHS3 compliance and established supply chain availability, addressing the obsolescence status of the CS220-8N. Both devices share identical voltage ratings, gate trigger specifications, on-state voltage characteristics, and operating temperature ranges, ensuring compatibility with existing gate drive circuits and thermal management designs.

The primary design consideration is the reduced on-state RMS current rating of the TYN804RG (4A versus 8A). Selection of this substitute is appropriate when circuit RMS current requirements do not exceed 4A. For applications requiring the full 8A RMS capability of the original CS220-8N, alternative 800V SCRs with higher current ratings must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the TYN804RG directly replace the CS220-8N in all applications?

A: Direct replacement is possible from a package and electrical interface perspective. Both devices use TO-220-3 through-hole packaging and share identical gate trigger and on-state voltage specifications. However, the TYN804RG has a maximum on-state RMS current of 4A compared to the CS220-8N's 8A rating. Substitution is valid only when circuit RMS current requirements do not exceed 4A.

Q: What does "Standard Recovery" SCR type mean for substitution purposes?

A: Standard recovery SCRs are designed for AC switching applications where the gate signal controls turn-on and the AC waveform provides natural commutation for turn-off. Both the CS220-8N and TYN804RG are standard recovery devices, ensuring compatible switching behavior in AC phase control and AC switching circuits.

Q: Are there compliance or supply chain advantages to using the TYN804RG?

A: Yes. The TYN804RG is an active product with ROHS3 compliance and is manufactured by STMicroelectronics, a major semiconductor supplier with established global distribution. The CS220-8N is obsolete, making the TYN804RG the preferred choice for new designs and ongoing procurement.

Q: How do the hold current specifications differ, and does this affect substitution?

A: The TYN804RG has a maximum hold current of 30mA compared to the CS220-8N's 20mA. This higher hold current requirement means the gate drive circuit must supply sufficient current to maintain conduction once the SCR is triggered. Existing gate drive designs for the CS220-8N must be verified to supply at least 30mA to ensure reliable operation with the TYN804RG.

Q: What is the significance of the surge current ratings?

A: The CS220-8N specifies 60A non-repetitive surge current at 50Hz, while the TYN804RG specifies 63A at 50Hz and 60A at 60Hz. Both devices have comparable surge current handling, indicating similar transient overstress protection in AC line applications.

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