S2004DS1RP Equivalent & Substitute Parts

Part Overview

The S2004DS1RP is a Sensitive Gate SCR (Silicon Controlled Rectifier) rated for 200V off-state voltage with 4A 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 part maintains full RoHS3 compliance and unlimited moisture sensitivity rating, suitable for industrial switching and control applications.

Key Parameters

Parameter	Value
Voltage - Off State	200 V
Current - On State (It RMS)	4 A
Voltage - Gate Trigger (Vgt) Max	800 mV
Current - Gate Trigger (Igt) Max	50 µA
Voltage - On State (Vtm) Max	1.6 V
SCR Type	Sensitive Gate
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature Range	-40°C to 110°C
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the S2004DS1RP are selected based on strict electrical and mechanical compatibility criteria. The primary substitutes maintain identical gate trigger characteristics (Vgt and Igt), on-state voltage drop (Vtm), hold current (Ih), and package configuration (TO-252 DPAK). The key differentiator among substitutes is the off-state voltage rating, which determines application suitability:

Substitution Criteria:

SCR Type: Sensitive Gate (maintained across all substitutes)
Gate Trigger Voltage (Vgt Max): 800 mV (identical)
Gate Trigger Current (Igt Max): 50 µA (identical)
On-State Voltage (Vtm Max): 1.6 V (identical)
On-State Current (It RMS): 4 A (identical)
Package: TO-252-3 DPAK (identical)
Operating Temperature: -40°C to 110°C (identical)
Mounting: Surface Mount (identical)

Voltage Rating Variants:

S4004DS1RP: 400V off-state rating (higher voltage capability)
S6004DS1RP: 600V off-state rating (highest voltage capability)

Parameter Comparison

Parameter	S2004DS1RP	S4004DS1RP	S6004DS1RP
Voltage - Off State	200 V	400 V	600 V
Voltage - Gate Trigger (Vgt) Max	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) Max	50 µA	50 µA	50 µA
Voltage - On State (Vtm) Max	1.6 V	1.6 V	1.6 V
Current - On State (It RMS) Max	4 A	4 A	4 A
Current - Hold (Ih) Max	4 mA	4 mA	4 mA
Current - Off State Max	2 µA	2 µA	2 µA
Current - Non Rep. Surge (Itsm)	25A, 30A	25A, 30A	25A, 30A
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C to 110°C	-40°C to 110°C	-40°C to 110°C
Package / Case	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

S4004DS1RP (400V Rating): This substitute is suitable for applications requiring higher voltage blocking capability than the original 200V specification. The 400V rating provides increased design margin for transient voltage conditions while maintaining identical gate drive and on-state characteristics. Product status is active with full RoHS3 compliance and REACH unaffected designation.

S6004DS1RP (600V Rating): This substitute offers maximum voltage blocking capability within the Littelfuse Sensitive Gate SCR family. The 600V rating accommodates the most demanding voltage environments while preserving all gate trigger and conduction parameters. Product status is active with full RoHS3 compliance and REACH unaffected designation.

Both substitutes are manufactured by Littelfuse Inc. and maintain identical electrical performance in gate drive, on-state conduction, and thermal characteristics. Selection between S4004DS1RP and S6004DS1RP depends solely on the maximum voltage the application must withstand.

Frequently Asked Questions (FAQ)

Q: Can S4004DS1RP or S6004DS1RP be used as direct replacements for S2004DS1RP?

A: Yes, both substitutes are direct replacements from an electrical and mechanical standpoint. All gate trigger parameters, on-state voltage drop, current ratings, and package configuration are identical. The higher voltage ratings (400V and 600V) are backward compatible with 200V applications.

Q: What is the difference between the three parts?

A: The only difference is the off-state voltage rating: S2004DS1RP (200V), S4004DS1RP (400V), and S6004DS1RP (600V). All other electrical characteristics and the TO-252 DPAK package are identical.

Q: Why is S2004DS1RP obsolete while S4004DS1RP and S6004DS1RP are active?

A: Product status reflects manufacturer availability and production decisions. The higher voltage variants remain in active production and are recommended for new designs.

Q: Are there any thermal or reliability differences between these parts?

A: No. Operating temperature range (-40°C to 110°C), current ratings, and thermal characteristics are identical across all three parts.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the application voltage does not exceed the original 200V specification. The higher voltage-rated substitutes will function identically in 200V circuits.

Q: What packaging options are available?

A: S4004DS1RP and S6004DS1RP are supplied in Tape & Reel (TR) packaging. All parts use the TO-252-3 DPAK surface mount package.

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