S2008R Equivalent & Substitute Parts

Part Overview

The S2008R is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc., rated for 200V off-state voltage with 8A RMS current capacity in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The S2008R operates across a temperature range of -40°C to 125°C and is ROHS3 compliant.

Key Parameters

Parameter	Value
Voltage - Off State	200 V
Current - On State (It (RMS))	8 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)	30 mA
Operating Temperature Range	-40°C to 125°C
Package / Case	TO-220-3
Mounting Type	Through Hole
SCR Type	Standard Recovery

Substitute Part Grouping Explanation

Substitution of the S2008R is determined by the following critical parameters:

Package Compatibility: TO-220-3 through-hole mounting is required for direct mechanical and electrical compatibility
Current Rating: RMS current capacity of 8A must be maintained or exceeded
Gate Trigger Parameters: Vgt (Max) 1.5V and Igt (Max) 15mA define gate drive requirements
On-State Voltage: Vtm (Max) 1.6V establishes conduction losses
Hold Current: Ih (Max) 30mA determines minimum holding conditions
Operating Temperature: -40°C to 125°C range must be supported
SCR Type: Standard Recovery classification ensures switching characteristics compatibility

The TYN608RG from STMicroelectronics meets these substitution criteria while offering enhanced off-state voltage rating (600V versus 200V), providing superior voltage margin for circuit protection.

Parameter Comparison

Parameter	S2008R (Littelfuse)	TYN608RG (STMicroelectronics)
Voltage - Off State	200 V	600 V
Current - On State (It (RMS))	8 A	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	15 mA	15 mA
Voltage - On State (Vtm) (Max)	1.6 V	1.6 V
Current - Hold (Ih) (Max)	30 mA	30 mA
Current - Off State (Max)	10 µA	5 µA
Operating Temperature Range	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole
SCR Type	Standard Recovery	Standard Recovery
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The TYN608RG is a direct functional substitute for the S2008R. Both components share identical RMS current capacity (8A), gate trigger specifications, on-state voltage characteristics, and operating temperature range. The TYN608RG maintains active product status with STMicroelectronics, ensuring long-term availability and supply chain continuity. Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications.

The TYN608RG provides superior off-state voltage rating (600V versus 200V), which enhances circuit reliability in applications where voltage transients or margin requirements exceed the S2008R specification. The lower off-state leakage current (5µA versus 10µA) in the TYN608RG offers improved efficiency characteristics.

Frequently Asked Questions (FAQ)

Q: Can the TYN608RG directly replace the S2008R in existing designs?

A: Yes. Both components share identical TO-220-3 package geometry, RMS current rating (8A), gate trigger parameters, and operating temperature range. Pin configuration and mounting requirements are identical.

Q: What is the primary difference between these parts?

A: The TYN608RG has a higher off-state voltage rating (600V versus 200V). This provides additional voltage margin and is suitable for applications requiring enhanced transient protection. The TYN608RG also features lower off-state leakage current.

Q: Are there any circuit design considerations when substituting?

A: No circuit modifications are required. The TYN608RG's higher voltage rating and lower leakage current are backward-compatible with S2008R applications. Gate drive circuits and current handling remain unchanged.

Q: Why is the S2008R listed as obsolete?

A: The S2008R is no longer manufactured by Littelfuse Inc. The TYN608RG from STMicroelectronics is an active product with ongoing production and supply availability.

Q: Are both parts RoHS compliant?

A: Yes. Both the S2008R and TYN608RG are ROHS3 compliant and carry identical environmental compliance certifications.

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