S2012VTP Equivalent & Substitute Parts Reference

Part Overview

The S2012VTP is a Silicon Controlled Rectifier (SCR) rated for 200V off-state voltage with 12A RMS on-state current capacity, manufactured by Littelfuse Inc. in a TO-251 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The S2012VTP operates across a temperature range of -40°C to 125°C and complies with RoHS3 standards.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	200	V
Current - On State (It RMS)	12	A
Voltage - Gate Trigger (Vgt) Max	1.5	V
Current - Gate Trigger (Igt) Max	20	mA
Voltage - On State (Vtm) Max	1.6	V
Current - Hold (Ih) Max	40	mA
Operating Temperature Range	-40 to 125	°C
Package Type	TO-251	-
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

Substitute parts for the S2012VTP are qualified based on the following criteria:

Electrical Compatibility Requirements:

Identical on-state current rating: 12A RMS
Gate trigger voltage (Vgt) and current (Igt) specifications must match or be lower
On-state voltage drop (Vtm) must not exceed the original specification
Hold current (Ih) must be compatible with circuit requirements
Operating temperature range must encompass or exceed -40°C to 125°C

Mechanical Compatibility Requirements:

Identical package type: TO-251 through-hole configuration
Pin configuration and lead spacing must be compatible with existing PCB layouts

Substitution Logic: The S4012VTP and S6012VTP are qualified substitutes because they maintain identical gate trigger specifications, on-state current ratings, on-state voltage characteristics, hold current, and operating temperature range. The primary difference is elevated off-state voltage ratings (400V and 600V respectively), which provides enhanced voltage margin in applications. Both substitute parts are available in active product status with current manufacturing support and RoHS3 compliance.

Parameter Comparison

Parameter	S2012VTP	S4012VTP	S6012VTP	Unit
Voltage - Off State	200	400	600	V
Voltage - Gate Trigger (Vgt) Max	1.5	1.5	1.5	V
Current - Gate Trigger (Igt) Max	20	20	20	mA
Voltage - On State (Vtm) Max	1.6	1.6	1.6	V
Current - On State (It RMS) Max	12	12	12	A
Current - Hold (Ih) Max	40	40	40	mA
Current - Off State Max	10	10	10	µA
Operating Temperature Range	-40 to 125	-40 to 125	-40 to 125	°C
Package / Case	TO-251-3 Short Leads	TO-251-3 Short Leads	TO-251-3 Short Leads	-
Mounting Type	Through Hole	Through Hole	Through Hole	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-
Product Status	Obsolete	Active	Active	-

Engineering Selection Recommendations

S4012VTP Selection Criteria: The S4012VTP is suitable for applications where the circuit voltage does not exceed 400V. This substitute provides a 2x voltage margin over the original S2012VTP specification while maintaining all electrical and thermal characteristics. The S4012VTP is in active product status with current manufacturing support and RoHS3 compliance, ensuring long-term availability and supply chain stability.

S6012VTP Selection Criteria: The S6012VTP is appropriate for applications requiring maximum voltage headroom up to 600V. This substitute offers a 3x voltage margin and is recommended for circuits with potential voltage transients or overvoltage conditions. The S6012VTP maintains active product status with RoHS3 compliance and REACH unaffected designation, supporting regulatory requirements across multiple markets.

Obsolescence Mitigation: Both substitute parts address the obsolescence of the S2012VTP by providing active, currently manufactured alternatives with identical functional performance in gate trigger, on-state current, and thermal operating characteristics. Selection between S4012VTP and S6012VTP depends solely on the maximum voltage requirement of the application circuit.

Frequently Asked Questions (FAQ)

Q: Can S4012VTP or S6012VTP be used as direct replacements for S2012VTP? A: Yes, both parts are direct substitutes. They maintain identical gate trigger voltage and current specifications, on-state current ratings, on-state voltage characteristics, hold current, and operating temperature range. The TO-251 package and through-hole mounting are identical, allowing direct PCB substitution.

Q: What is the primary difference between the substitute parts? A: The S4012VTP and S6012VTP differ only in off-state voltage rating. The S4012VTP is rated for 400V, while the S6012VTP is rated for 600V. All other electrical parameters remain identical to the original S2012VTP specification.

Q: How do I select between S4012VTP and S6012VTP? A: Selection is based on the maximum voltage the SCR will experience in the application circuit. If the circuit voltage does not exceed 400V, either part is acceptable. For circuits with higher voltage requirements or potential transients, the S6012VTP provides additional voltage margin.

Q: Are there any package or pinout differences? A: No. Both substitute parts use the TO-251-3 short leads package with identical pinout and lead spacing. They are mechanically and electrically compatible with existing S2012VTP PCB layouts.

Q: What is the compliance status of the substitute parts? A: Both S4012VTP and S6012VTP are RoHS3 compliant. The S6012VTP additionally carries REACH unaffected designation. Both parts are classified as active products with current manufacturing support.

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