S2008DS2RP Equivalent & Substitute Parts

Part Overview

The S2008DS2RP is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 200V off-state voltage with 8A RMS current capability in a surface mount TO-252 (DPAK) package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain identical electrical characteristics and mechanical compatibility while offering active product status and improved availability.

Substiute Parts

S2008DS2RP

Littelfuse Inc.In Stock: 3781S2008DS2RP Datasheet

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S4008DS2RP

Littelfuse Inc.In Stock: 3015S4008DS2RP Datasheet

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S6008DS2RP

Littelfuse Inc.In Stock: 17290S6008DS2RP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S2008DS2RP are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

• SCR Type: Sensitive Gate (maintained across all substitutes)
• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63 (identical mechanical footprint)
• Mounting Type: Surface Mount (consistent with original)
• Gate Trigger Characteristics: Vgt (Max) 800 mV and Igt (Max) 200 µA (identical gate drive requirements)
• On-State Voltage: Vtm (Max) 1.6 V (identical conduction characteristics)
• Current Ratings: It (RMS) 8 A and It (AV) 5.1 A (identical current handling)
• Hold Current: Ih (Max) 6 mA (identical holding requirements)
• Operating Temperature Range: -40°C ~ 110°C (identical thermal operating window)
• RoHS Status: ROHS3 Compliant (maintained compliance requirement)
• MSL Rating: 1 (Unlimited) (identical moisture sensitivity)

The S4008DS2RP and S6008DS2RP are qualified substitutes because they maintain all electrical parameters identical to the S2008DS2RP while differing only in off-state voltage rating (400V and 600V respectively). This voltage rating difference allows these parts to function as direct replacements in applications where the original 200V rating is sufficient, with the higher voltage rating providing additional design margin without affecting circuit operation.

Parameter Comparison

Engineering Selection Recommendations

S4008DS2RP is the preferred substitute for applications where the original 200V off-state voltage specification is adequate. This part maintains active product status with Littelfuse Inc., ensuring long-term availability and supply chain stability. The 400V rating provides additional voltage margin while maintaining identical electrical performance across all gate drive, conduction, and thermal parameters. ROHS3 compliance and MSL 1 rating are preserved.

S6008DS2RP is the alternative substitute for applications requiring maximum voltage margin or operating in environments with potential voltage transients. This part offers the highest off-state voltage rating (600V) among the qualified substitutes while maintaining identical electrical characteristics. Active product status and full compliance certifications are maintained. Inventory availability for S6008DS2RP is significantly higher (17,237 pcs) compared to S4008DS2RP (3,004 pcs), supporting extended production runs.

Both substitutes are manufactured by Littelfuse Inc., the original manufacturer of the S2008DS2RP, ensuring consistent quality and reliability standards. Selection between S4008DS2RP and S6008DS2RP depends on circuit voltage requirements and supply chain considerations rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can S4008DS2RP or S6008DS2RP be used as direct replacements for S2008DS2RP in existing designs?

A: Yes. Both substitutes maintain identical electrical parameters including gate trigger voltage, gate trigger current, on-state voltage, current ratings, hold current, and operating temperature range. The TO-252 (DPAK) package footprint is identical, enabling direct PCB compatibility without layout modifications.

Q: What is the difference between the three parts?

A: The primary difference is the off-state voltage rating: S2008DS2RP is rated 200V, S4008DS2RP is rated 400V, and S6008DS2RP is rated 600V. All other electrical and mechanical specifications are identical. The higher voltage rating provides additional design margin without affecting circuit operation in applications where the original 200V specification is sufficient.

Q: Why is S2008DS2RP obsolete while the substitutes are active?

A: Product obsolescence reflects manufacturing discontinuation by Littelfuse Inc. The substitute parts (S4008DS2RP and S6008DS2RP) represent the current active product line offering equivalent functionality with improved long-term availability and supply chain support.

Q: Are there any compliance or certification differences between the parts?

A: No. All three parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating. Both substitutes carry REACH Unaffected status, providing equivalent regulatory compliance for design implementation.

Q: What is the package compatibility between these parts?

A: All three parts use the identical TO-252-3 (DPAK with 2 Leads + Tab) package designation SC-63. This ensures mechanical and thermal compatibility on the same PCB footprint without any package-related design changes.

Q: Can I use S6008DS2RP in place of S4008DS2RP?

A: Yes. S6008DS2RP maintains all electrical parameters identical to S4008DS2RP while offering a higher off-state voltage rating (600V vs 400V). This substitution introduces additional voltage margin with no negative impact on circuit operation.