VS-25RIA120 Equivalent & Substitute Parts

Part Overview

The VS-25RIA120 is a 1.2 kV, 40 A standard recovery SCR (silicon-controlled rectifier) in TO-208AA chassis stud mount packaging manufactured by Vishay General Semiconductor - Diodes Division. This thyristor is designed for high-voltage switching applications requiring reliable gate-triggered control and robust thermal performance. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity across manufacturing environments.

Key Parameters

Parameter	Value	Unit
Voltage - Off State	1.2	kV
Voltage - Gate Trigger (Vgt) Max	2	V
Current - Gate Trigger (Igt) Max	60	mA
Voltage - On State (Vtm) Max	1.7	V
Current - On State (It RMS) Max	40	A
Current - Hold (Ih) Max	130	mA
Current - Off State Max	10	mA
Operating Temperature Range	-65 to 125	°C
Package / Case	TO-208AA (TO-48-3)	Stud Mount
SCR Type	Standard Recovery	—

Substitute Part Grouping Explanation

Substitute parts for the VS-25RIA120 are classified as parametric equivalents based on matching electrical and mechanical specifications. The substitution criteria are strictly defined by the following parameters:

Off-state voltage rating: 1.2 kV
Gate trigger voltage and current: 2 V maximum, 60 mA maximum
On-state voltage drop: 1.7 V maximum
RMS current rating: 40 A
Hold current: 130 mA maximum
Off-state leakage current: 10 mA maximum
Operating temperature range: -65°C to 125°C
Package type: TO-208AA chassis stud mount
SCR recovery class: Standard Recovery
Compliance: RoHS3, REACH Unaffected

Parts VS-25RIA120M and VS-25RIA120S90 meet all electrical and mechanical requirements for direct substitution. Both maintain identical voltage ratings, gate control parameters, on-state characteristics, and thermal operating range. Packaging and mounting configuration are identical across all three part numbers.

Parameter Comparison

Parameter	VS-25RIA120	VS-25RIA120M	VS-25RIA120S90
Voltage - Off State (kV)	1.2	1.2	1.2
Voltage - Gate Trigger Max (V)	2	2	2
Current - Gate Trigger Max (mA)	60	60	60
Voltage - On State Max (V)	1.7	1.7	1.7
Current - On State RMS Max (A)	40	40	40
Current - Hold Max (mA)	130	130	130
Current - Off State Max (mA)	10	10	10
Operating Temperature (°C)	-65 to 125	-65 to 125	-65 to 125
Package / Case	TO-208AA	TO-208AA	TO-208AA
SCR Type	Standard Recovery	Standard Recovery	Standard Recovery
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three part numbers—VS-25RIA120, VS-25RIA120M, and VS-25RIA120S90—are Active products with identical electrical performance and mechanical compatibility. Selection among these equivalents may be based on inventory availability and supply chain considerations. Current stock levels are: VS-25RIA120 (1009 pcs), VS-25RIA120M (922 pcs), and VS-25RIA120S90 (1134 pcs). All parts maintain full RoHS3 compliance and REACH Unaffected status, meeting regulatory requirements for industrial and commercial applications. No performance differentiation exists between these part numbers for the specified electrical and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can VS-25RIA120M be used as a direct replacement for VS-25RIA120?

A: Yes. VS-25RIA120M is a parametric equivalent with identical electrical ratings, gate control characteristics, on-state performance, and TO-208AA stud mount packaging. No circuit modifications are required.

Q: What is the difference between VS-25RIA120S90 and the other two part numbers?

A: VS-25RIA120S90 is electrically and mechanically identical to VS-25RIA120 and VS-25RIA120M. All three parts share the same voltage ratings, current specifications, temperature range, and package type. The part number suffix indicates internal manufacturing or quality tracking designations that do not affect functional performance.

Q: Are all three parts suitable for the same circuit applications?

A: Yes. All three part numbers meet identical electrical specifications for 1.2 kV switching applications with 40 A RMS current capacity. They are interchangeable in circuits designed for the VS-25RIA120 base specification.

Q: Do these parts require different PCB layouts or mounting considerations?

A: No. All three parts use identical TO-208AA chassis stud mount packaging. PCB layouts, thermal management, and mechanical mounting are identical across all part numbers.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts maintain identical RoHS3 compliance, REACH Unaffected status, and regulatory certifications. No additional testing or qualification is required when substituting between these part numbers.

Q: Which part number should be selected based on availability?

A: Selection should be based on current inventory and supply chain requirements. All three parts are functionally equivalent. VS-25RIA120S90 currently has the highest stock level (1134 pcs), followed by VS-25RIA120 (1009 pcs) and VS-25RIA120M (922 pcs).

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