VS-81RIA80 Equivalent & Substitute Parts

Part Overview

The VS-81RIA80 is an 800V, 125A SCR (Silicon Controlled Rectifier) manufactured by Vishay General Semiconductor - Diodes Division. This thyristor operates as a standard recovery device in a TO-209AC chassis stud mount package, designed for high-voltage switching applications requiring robust current handling. The part maintains active product status with 1091 units in current inventory. Substitute parts are identified when electrical parameters, mechanical packaging, and compliance certifications remain identical across the component lifecycle or manufacturing variants.

Key Parameters

Parameter	Value
Voltage - Off State	800 V
Current - On State (It (RMS))	125 A
Voltage - On State (Vtm) (Max)	1.6 V
Current - Gate Trigger (Igt) (Max)	120 mA
Voltage - Gate Trigger (Vgt) (Max)	2.5 V
SCR Type	Standard Recovery
Package / Case	TO-209AC, TO-94-4, Stud
Operating Temperature Range	-40°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the VS-81RIA80 is determined by exact equivalence across the following critical parameters:

Off-state voltage rating: 800 V
RMS on-state current capacity: 125 A
On-state voltage drop: 1.6 V maximum
Gate trigger current: 120 mA maximum
Gate trigger voltage: 2.5 V maximum
SCR recovery classification: Standard Recovery
Package configuration: TO-209AC (TO-94-4) stud mount
Temperature operating range: -40°C to 125°C
Compliance certifications: ROHS3, REACH Unaffected

The VS-80RIA80PBF qualifies as a parametric equivalent based on identical electrical specifications and mechanical packaging. Both parts share the same base product lineage within the Vishay RIA80 series and maintain equivalent performance characteristics across all specified operating conditions.

Parameter Comparison

Parameter	VS-81RIA80	VS-80RIA80PBF	Match
Voltage - Off State	800 V	800 V	✓
Current - On State (It (RMS))	125 A	125 A	✓
Voltage - On State (Vtm) (Max)	1.6 V	1.6 V	✓
Current - On State (It (AV))	80 A	80 A	✓
Current - Gate Trigger (Igt) (Max)	120 mA	120 mA	✓
Voltage - Gate Trigger (Vgt) (Max)	2.5 V	2.5 V	✓
Current - Hold (Ih) (Max)	200 mA	200 mA	✓
Current - Off State (Max)	15 mA	15 mA	✓
Current - Non Rep. Surge (50/60Hz)	1600A, 1675A	1600A, 1675A	✓
SCR Type	Standard Recovery	Standard Recovery	✓
Operating Temperature	-40°C to 125°C	-40°C to 125°C	✓
Package / Case	TO-209AC, TO-94-4, Stud	TO-209AC, TO-94-4, Stud	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
REACH Status	REACH Unaffected	REACH Unaffected	✓
Product Status	Active	Active	✓

Engineering Selection Recommendations

Both the VS-81RIA80 and VS-80RIA80PBF maintain active product status from Vishay General Semiconductor - Diodes Division and carry identical ROHS3 and REACH compliance certifications. Selection between these parts may be determined by inventory availability: the VS-81RIA80 currently maintains 1091 units in stock, while the VS-80RIA80PBF has 786 units available. The "PBF" suffix on the VS-80RIA80PBF indicates lead-free plating finish, consistent with ROHS3 requirements. Both parts are suitable for direct substitution in applications requiring 800V, 125A SCR functionality with standard recovery characteristics in TO-209AC stud mount configuration.

Frequently Asked Questions (FAQ)

Q: Can VS-80RIA80PBF replace VS-81RIA80 in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all specified parameters. The substitution is valid for any application currently using the VS-81RIA80.

Q: What does the "PBF" designation mean?

A: PBF indicates lead-free plating finish, confirming ROHS3 compliance. This is a manufacturing variant designation and does not affect electrical performance or compatibility.

Q: Are there any package differences between these parts?

A: No. Both parts use identical TO-209AC (TO-94-4) stud mount packaging with the same mechanical footprint and mounting requirements.

Q: What are the critical parameters for SCR substitution?

A: Off-state voltage (800V), RMS on-state current (125A), on-state voltage drop (1.6V max), gate trigger specifications (120mA, 2.5V max), and recovery type (Standard Recovery) must remain constant. Package configuration and operating temperature range must also match.

Q: Are both parts ROHS3 compliant?

A: Yes. Both VS-81RIA80 and VS-80RIA80PBF are ROHS3 compliant with REACH Unaffected status, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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