S2008DS3RP Equivalent & Substitute Parts

Part Overview

The S2008DS3RP 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 new designs and ongoing production requirements. The S2008DS3RP shares identical gate characteristics, on-state performance, and package configuration with higher voltage-rated alternatives from Littelfuse Inc., enabling direct functional substitution in applications where voltage headroom permits.

Substiute Parts

S2008DS3RP

Littelfuse Inc.In Stock: 1082S2008DS3RP Datasheet

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S4008DS3RP

Littelfuse Inc.In Stock: 1015S4008DS3RP Datasheet

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S6008DS3RP

Littelfuse Inc.In Stock: 860S6008DS3RP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the S2008DS3RP is determined by the following criteria:

Mandatory Compatibility Parameters:

• SCR Type: Sensitive Gate (gate trigger voltage and current must remain ≤800 mV and ≤500 µA respectively)
• Voltage - On State (Vtm): ≤1.6 V maximum
• Current - On State (It RMS): ≥8 A capability
• Current - Hold (Ih): ≤8 mA maximum
• Package / Case: TO-252-3, DPAK (2 Leads + Tab)
• Mounting Type: Surface Mount
• Operating Temperature: -40°C to 110°C minimum

Substitution Logic: The S2008DS3RP can be replaced by SCR devices with identical or superior gate characteristics, on-state performance, and package configuration. The off-state voltage rating may be increased without functional impact, provided all other electrical parameters remain within specified limits. Both substitute parts (S4008DS3RP and S6008DS3RP) meet these criteria with higher voltage ratings (400V and 600V respectively), offering improved voltage margin in applications.

Parameter Comparison

Engineering Selection Recommendations

S4008DS3RP (400V Rating): This substitute provides a 2x voltage margin over the S2008DS3RP while maintaining identical gate trigger characteristics and on-state performance. The S4008DS3RP is classified as Active product status, ensuring continued availability and supply chain stability. ROHS3 compliance and MSL Level 1 rating match the original specification. Selection of this part is appropriate for applications requiring moderate voltage headroom without exceeding thermal or current constraints.

S6008DS3RP (600V Rating): This substitute provides a 3x voltage margin over the S2008DS3RP with identical electrical performance in gate triggering and on-state operation. The S6008DS3RP is classified as Active product status with ROHS3 compliance and MSL Level 1 rating. This part is suitable for applications requiring maximum voltage protection or operation in higher voltage environments while maintaining the same current and thermal characteristics.

Both substitute parts are manufactured by Littelfuse Inc. and share identical package configuration, mounting type, and environmental operating range with the S2008DS3RP. Selection between S4008DS3RP and S6008DS3RP depends on the application's maximum voltage requirement and system design margin specifications.

Frequently Asked Questions (FAQ)

Q: Can the S4008DS3RP or S6008DS3RP be used as direct replacements for the S2008DS3RP?

A: Yes, both parts are direct functional substitutes. All gate trigger parameters (Vgt, Igt), on-state voltage (Vtm), hold current (Ih), and RMS current rating (8A) are identical. The package configuration (TO-252-3, DPAK), mounting type (surface mount), and operating temperature range (-40°C to 110°C) are identical. The higher off-state voltage ratings (400V and 600V) provide additional voltage margin without affecting circuit operation.

Q: What is the primary difference between S4008DS3RP and S6008DS3RP?

A: The primary difference is the off-state voltage rating. The S4008DS3RP is rated for 400V, while the S6008DS3RP is rated for 600V. All other electrical parameters, including gate characteristics, on-state performance, current ratings, and package configuration, are identical between these two parts.

Q: Are there any compatibility concerns when substituting the S2008DS3RP with higher voltage-rated alternatives?

A: No compatibility concerns exist for applications where the circuit voltage does not exceed the substitute part's rating. The higher voltage rating provides additional safety margin. PCB layout, gate drive circuitry, and thermal management remain unchanged. Verify that the application's maximum voltage does not exceed 400V for S4008DS3RP or 600V for S6008DS3RP.

Q: What is the significance of the "Sensitive Gate" designation?

A: Sensitive Gate SCRs have lower gate trigger voltage (Vgt ≤800 mV) and current (Igt ≤500 µA) requirements compared to standard SCRs. This characteristic is maintained across all three parts (S2008DS3RP, S4008DS3RP, and S6008DS3RP), ensuring identical gate drive circuit requirements and control signal compatibility.

Q: Are the substitute parts available in the same packaging format?

A: Yes. Both S4008DS3RP and S6008DS3RP are supplied in Tape & Reel (TR) packaging for automated assembly. The S2008DS3RP was supplied in standard packaging. The component itself uses identical TO-252-3 (DPAK) package with 2 leads plus tab, ensuring identical PCB footprint and soldering requirements.

Q: What is the product status significance?

A: The S2008DS3RP is classified as Obsolete, indicating discontinued manufacturing and limited availability. Both substitute parts (S4008DS3RP and S6008DS3RP) are classified as Active, ensuring ongoing production, supply chain availability, and long-term support from Littelfuse Inc.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. The substitute parts include REACH Unaffected status, confirming compliance with environmental and hazardous substance regulations.