S2004DS1TP Equivalent & Substitute Parts

Part Overview

The S2004DS1TP is a 200V, 4A sensitive gate SCR manufactured by Littelfuse Inc. 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 operates across an industrial temperature range of -40°C to 110°C.

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
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 110°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the S2004DS1TP are qualified based on the following criteria:

Electrical Parameters (Must Match or Exceed):

Gate trigger voltage (Vgt): 800 mV maximum
Gate trigger current (Igt): 50 µA maximum
On-state voltage (Vtm): 1.6 V maximum
Sensitive gate SCR type classification
Operating temperature range: -40°C to 110°C minimum

Mechanical Parameters (Must Match):

Surface mount package: TO-252-3 (DPAK)
Pin configuration: 2 Leads + Tab (SC-63)

Compliance Parameters (Must Match or Exceed):

RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)

Voltage Rating Consideration: Substitute parts may have higher off-state voltage ratings (400V or 600V) while maintaining identical gate control characteristics and on-state current ratings. Higher voltage ratings provide design flexibility for applications with elevated supply voltages while preserving full backward compatibility with the original 200V specification.

Parameter Comparison

Parameter	S2004DS1TP	S4004DS1TP	S6004DS1TP
Voltage - Off State	200 V	400 V	600 V
Current - On State (It (RMS))	4 A	4 A	4 A
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 - Hold (Ih) (Max)	4 mA	4 mA	4 mA
Current - Off State (Max)	2 µA	2 µA	2 µA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate
Operating Temperature	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 110°C
Package / Case	TO-252-3, DPAK	TO-252-3, DPAK	TO-252-3, DPAK
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

S4004DS1TP (400V Rating): Select this substitute when the application circuit operates at voltages up to 400V. This part maintains active product status with Littelfuse Inc., ensuring long-term availability and supply chain continuity. All electrical control characteristics remain identical to the S2004DS1TP, providing direct functional equivalence with enhanced voltage margin.

S6004DS1TP (600V Rating): Select this substitute for applications requiring maximum voltage headroom or when circuit design specifies 600V operation. This part also maintains active product status and provides the highest voltage rating among available substitutes while preserving all gate control and current handling specifications.

Both substitute parts are RoHS3 compliant and carry unlimited moisture sensitivity classification, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can S4004DS1TP or S6004DS1TP be used as direct replacements for S2004DS1TP?

A: Yes. Both substitute parts are electrically and mechanically compatible. They share identical gate trigger voltage, gate trigger current, on-state voltage, on-state current, hold current, and off-state current specifications. All three parts use the same TO-252 (DPAK) surface mount package with identical pin configuration.

Q: What is the difference between the three parts?

A: The primary difference is the off-state voltage rating. S2004DS1TP is rated for 200V, S4004DS1TP for 400V, and S6004DS1TP for 600V. All other electrical and mechanical parameters are identical.

Q: Why would I choose a higher voltage-rated part?

A: Higher voltage ratings provide design flexibility and safety margin in applications where supply voltage may exceed the original specification or where circuit topology requires elevated voltage capability. The higher-rated parts function identically in lower-voltage applications.

Q: Are there any package or mounting differences?

A: No. All three parts use the TO-252-3 (DPAK) surface mount package with 2 leads plus tab configuration. PCB footprints and assembly processes are identical.

Q: What is the product status significance?

A: S2004DS1TP is obsolete, meaning Littelfuse Inc. no longer manufactures this part. S4004DS1TP and S6004DS1TP are active products with ongoing manufacturing and supply availability.

Q: Are all parts RoHS3 compliant?

A: Yes. S2004DS1TP, S4004DS1TP, and S6004DS1TP are all RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

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