2N6509T SCR 800V 25A TO-220AB Equivalent & Substitute Parts

Part Overview

The 2N6509T is a silicon-controlled rectifier (SCR) rated for 800V off-state voltage and 25A RMS on-state current in a TO-220-3 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The 2N6509T series provides standard recovery characteristics suitable for AC switching and power control applications requiring high voltage and moderate current handling.

Substiute Parts

2N6509T

onsemiIn Stock: 10932N6509T Datasheet

Current PartRFQ

2N6509TG

Littelfuse Inc.In Stock: 23732N6509TG Datasheet

DirectRFQ

2N6509G

Littelfuse Inc.In Stock: 16002N6509G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N6509T is determined by electrical and mechanical parameter matching across the following criteria:

Electrical Parameters (Must Match):

• Off-state voltage: 800V
• Gate trigger voltage (Vgt): 1.5V maximum
• Gate trigger current (Igt): 30mA maximum
• On-state voltage (Vtm): 1.8V maximum
• RMS on-state current (It RMS): 25A maximum
• Hold current (Ih): 40mA maximum
• Off-state leakage current: 10µA maximum
• Non-repetitive surge current (Itsm): 250A @ 60Hz
• SCR recovery type: Standard Recovery

Mechanical Parameters (Must Match):

• Package type: TO-220-3
• Mounting: Through Hole
• Operating temperature range: -40°C to 125°C

The substitute parts 2N6509TG and 2N6509G meet all electrical and mechanical requirements. Both are manufactured by Littelfuse Inc. and maintain identical electrical specifications to the 2N6509T. The primary differences are product status (active vs. obsolete) and packaging format (box vs. tube).

Parameter Comparison

Engineering Selection Recommendations

Both 2N6509TG and 2N6509G are direct electrical equivalents to the 2N6509T with identical electrical performance across all specified parameters. Selection between these substitutes should be based on the following factors:

2N6509TG (Littelfuse, Box Packaging):

• Active product status ensures long-term availability
• ROHS3 compliance meets current environmental regulations
• Box packaging suitable for component kitting and controlled inventory environments
• 2300 units in stock

2N6509G (Littelfuse, Tube Packaging):

• Active product status ensures long-term availability
• ROHS3 compliance meets current environmental regulations
• Tube packaging standard for high-volume manufacturing and automated assembly
• 1491 units in stock

Both parts are manufactured by Littelfuse Inc., ensuring consistent quality and reliability. The choice between 2N6509TG and 2N6509G depends on assembly process requirements and packaging preferences rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can 2N6509TG or 2N6509G be used as direct replacements for 2N6509T?

A: Yes. Both parts are direct electrical equivalents with identical specifications for voltage, current, gate trigger parameters, and operating temperature range. All three parts use the TO-220-3 through-hole package and are mechanically compatible.

Q: What is the difference between 2N6509TG and 2N6509G?

A: The electrical specifications are identical. The primary differences are packaging format (2N6509TG supplied in boxes; 2N6509G supplied in tubes) and inventory availability. Both are manufactured by Littelfuse Inc. and carry ROHS3 compliance.

Q: Why is the 2N6509T listed as obsolete?

A: The 2N6509T is an older onsemi product. Littelfuse Inc. manufactures equivalent parts (2N6509TG and 2N6509G) that meet all electrical and mechanical specifications, making them suitable replacements for new designs and production continuity.

Q: Are there any compliance differences between the original and substitute parts?

A: Yes. The 2N6509T is RoHS non-compliant, while both 2N6509TG and 2N6509G are ROHS3 compliant. All three parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Which packaging format should I select for my application?

A: Select 2N6509TG (box packaging) for manual assembly, component kitting, or low-volume production. Select 2N6509G (tube packaging) for high-volume automated assembly lines where tape-and-reel or tube feeding is standard.

Q: Do the substitute parts have the same thermal and electrical performance as the 2N6509T?

A: Yes. All three parts share identical electrical ratings including on-state voltage drop (1.8V maximum), RMS current capacity (25A), gate trigger specifications, and operating temperature range (-40°C to 125°C). Thermal performance is equivalent across all three parts.