2N691A SCR 700V 25A Equivalent & Substitute Parts

Part Overview

The 2N691A is a silicon-controlled rectifier (SCR) rated for 700V off-state voltage and 25A RMS on-state current in a TO-48 chassis stud mount package. Manufactured by Central Semiconductor Corp, this component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 2N691A operates across a temperature range of -65°C to 125°C and features standard recovery characteristics suitable for industrial switching applications.

Substiute Parts

2N691A

Central Semiconductor CorpIn Stock: 7212N691A Datasheet

Current PartRFQ

VS-2N691

Vishay General Semiconductor - Diodes DivisionIn Stock: 875VS-2N691 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The VS-2N691 qualifies as a direct substitute for the 2N691A based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Voltage - Off State: 700V (identical)
• Voltage - Gate Trigger (Vgt) (Max): 2V (identical)
• Current - Gate Trigger (Igt) (Max): 40mA (identical)
• Voltage - On State (Vtm) (Max): 2V (identical)
• Current - On State (It (RMS)) (Max): 25A (identical)
• Operating Temperature Range: -65°C to 125°C (identical)
• SCR Type: Standard Recovery (identical)
• Mounting Type: Chassis, Stud Mount (identical)
• Package / Case: TO-208AA, TO-48-3, Stud (identical)

The VS-2N691 is manufactured by Vishay General Semiconductor - Diodes Division and maintains full electrical compatibility with the 2N691A across all specified switching and thermal parameters.

Parameter Comparison

Engineering Selection Recommendations

The VS-2N691 is the recommended substitute for the 2N691A. The 2N691A is obsolete and no longer in active production. The VS-2N691 maintains identical electrical specifications for all critical switching parameters and thermal operating range, ensuring functional equivalence in circuit applications.

The VS-2N691 offers additional advantages: it is currently in active production status with confirmed inventory availability, and it meets ROHS3 compliance requirements, whereas the 2N691A is RoHS non-compliant. The VS-2N691 exhibits lower leakage current (2.25 mA vs. 4.5 mA off-state) and lower holding current (20 mA vs. 50 mA), both of which represent improved performance characteristics. These differences do not affect substitution compatibility and may provide operational benefits in power management applications.

Frequently Asked Questions (FAQ)

Q: Can the VS-2N691 be used as a direct replacement for the 2N691A in existing designs?

A: Yes. The VS-2N691 maintains identical voltage ratings (700V off-state), gate trigger specifications (2V, 40mA), on-state voltage (2V), RMS current rating (25A), and operating temperature range (-65°C to 125°C). The package and mounting configuration are identical (TO-208AA/TO-48-3 stud mount). No circuit modifications are required.

Q: What are the differences between these parts?

A: The primary differences are product status and compliance. The 2N691A is obsolete; the VS-2N691 is active production. The VS-2N691 is ROHS3 compliant while the 2N691A is not. The VS-2N691 has lower off-state leakage current (2.25 mA vs. 4.5 mA) and lower holding current (20 mA vs. 50 mA). These differences do not affect electrical compatibility.

Q: Are there any package compatibility concerns?

A: No. Both parts use identical package designations: TO-208AA, TO-48-3, and stud mount configuration. Physical and electrical interfaces are fully compatible.

Q: Why is the 2N691A obsolete?

A: The 2N691A is classified as obsolete by Central Semiconductor Corp. The VS-2N691 from Vishay provides equivalent functionality and is in active production.

Q: Does the VS-2N691 meet current regulatory requirements?

A: Yes. The VS-2N691 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.