S2004VS1TP Equivalent & Substitute Parts

Part Overview

The S2004VS1TP is a 200V, 4A sensitive gate SCR (Silicon Controlled Rectifier) in TO-251 package manufactured by Littelfuse Inc. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The S2004VS1TP maintains electrical compatibility with higher voltage-rated alternatives within the same product family, provided that circuit voltage requirements do not exceed the substitute part's maximum off-state voltage rating.

Key Parameters

Parameter	Value
Voltage - Off State	200 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	50 µA
Voltage - On State (Vtm) (Max)	1.6 V
Current - On State (It (RMS)) (Max)	4 A
Current - Hold (Ih) (Max)	4 mA
Operating Temperature	-40°C ~ 110°C
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA
SCR Type	Sensitive Gate
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the S2004VS1TP are qualified based on the following criteria:

Identical electrical characteristics: Gate trigger voltage (Vgt), gate trigger current (Igt), on-state voltage (Vtm), on-state current (It), hold current (Ih), and operating temperature range must match exactly
Identical package and mounting: TO-251 through-hole package with identical pin configuration
Identical SCR type: Sensitive gate classification
Equal or higher off-state voltage rating: Substitute parts may have higher voltage ratings (400V, 600V) as they remain compatible in 200V applications
Compliance equivalence: RoHS3 compliance maintained across all substitutes

The S4004VS1TP and S6004VS1TP meet all substitution criteria. Both parts share identical gate characteristics, on-state parameters, thermal range, and package specifications with the S2004VS1TP. The higher voltage ratings (400V and 600V respectively) provide design flexibility for applications requiring voltage margin or future circuit modifications.

Parameter Comparison

Parameter	S2004VS1TP	S4004VS1TP	S6004VS1TP
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
Operating Temperature	-40°C ~ 110°C	-40°C ~ 110°C	-40°C ~ 110°C
Package / Case	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA	TO-251-3 Short Leads, IPak, TO-251AA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

S4004VS1TP is the direct functional upgrade for the obsolete S2004VS1TP. This part maintains all electrical and thermal specifications while providing a 2x voltage margin (400V vs. 200V). The S4004VS1TP is in active production status with confirmed inventory availability, ensuring supply chain continuity. ROHS3 compliance is maintained.

S6004VS1TP provides maximum voltage headroom at 600V off-state rating while preserving all other electrical characteristics. This part is also in active production with higher inventory levels (5105 pcs) compared to the S4004VS1TP. Selection of the S6004VS1TP is appropriate for applications requiring enhanced voltage stress tolerance or where circuit redesign may increase operating voltage in the future. ROHS3 compliance is maintained.

Both substitute parts are electrically and mechanically interchangeable with the S2004VS1TP in applications operating at or below 200V. Selection between S4004VS1TP and S6004VS1TP depends on circuit voltage requirements and design margin preferences.

Frequently Asked Questions (FAQ)

Q: Can S4004VS1TP or S6004VS1TP be used directly in place of S2004VS1TP?

A: Yes. Both substitute parts are pin-compatible and electrically equivalent for all gate control characteristics, on-state parameters, and thermal specifications. The higher voltage ratings do not affect operation in 200V circuits.

Q: What is the primary difference between the substitute parts?

A: The S4004VS1TP has a 400V off-state voltage rating, while the S6004VS1TP has a 600V rating. All other electrical and mechanical specifications are identical. Selection depends on required voltage margin and circuit design parameters.

Q: Are there any package or mounting differences?

A: No. All three parts use the identical TO-251-3 Short Leads package (IPak, TO-251AA) with through-hole mounting. PCB layout and assembly procedures remain unchanged.

Q: Is RoHS compliance maintained with substitute parts?

A: Yes. Both S4004VS1TP and S6004VS1TP are ROHS3 compliant, matching the compliance status of the original S2004VS1TP.

Q: Why is the S2004VS1TP classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The S4004VS1TP and S6004VS1TP represent the active product line alternatives with identical functionality and improved voltage ratings.

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