2N2640 Equivalent & Substitute Parts Reference

Part Overview

The 2N2640 is a dual NPN bipolar junction transistor (BJT) array manufactured by Central Semiconductor Corp in a TO-78-6 metal can package. This component is classified as obsolete, with 999 pieces available in new original stock. The 2N2640 is designed for applications requiring dual NPN transistor functionality with a maximum collector current of 30mA and collector-emitter breakdown voltage of 45V.

Due to its obsolete product status, equivalent substitute parts from active manufacturers are necessary for new designs and long-term supply chain continuity. The substitute parts listed maintain electrical and mechanical compatibility while offering active product status and improved compliance certifications.

Substiute Parts

2N2640

Central Semiconductor CorpIn Stock: 10642N2640 Datasheet

Current PartRFQ

MAT01AH

Analog Devices Inc.In Stock: 1257MAT01AH Datasheet

MFR RecommendedRFQ

MAT01AHZ

Analog Devices Inc.In Stock: 1475MAT01AHZ Datasheet

MFR RecommendedRFQ

MAT01GH

Analog Devices Inc.In Stock: 1384MAT01GH Datasheet

MFR RecommendedRFQ

MAT01GHZ

Analog Devices Inc.In Stock: 2008MAT01GHZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 2N2640 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor Type: 2 NPN (Dual) configuration
• Voltage - Collector Emitter Breakdown (Max): 45V minimum
• Current - Collector (Ic) (Max): Must support 30mA or greater
• Package / Case: TO-78-6 Metal Can (identical physical form factor)
• Mounting Type: Through Hole

Compliance and Status Considerations:

• Product Status: Active (preferred for new designs)
• RoHS Compliance: ROHS3 Compliant (improved environmental compliance)
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts MAT01AH, MAT01AHZ, MAT01GH, and MAT01GHZ from Analog Devices Inc. meet all electrical and mechanical compatibility criteria. These parts are dual NPN matched pair transistor arrays in TO-78-6 packages with 45V breakdown voltage ratings and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The MAT01AH, MAT01AHZ, MAT01GH, and MAT01GHZ parts from Analog Devices Inc. are direct functional equivalents for the 2N2640. All substitute parts share identical package geometry (TO-78-6 Metal Can), mounting type (Through Hole), and voltage rating (45V breakdown). The substitute parts are manufactured by an active supplier with ROHS3 compliance certification, providing improved environmental compliance compared to the obsolete 2N2640.

Electrical Considerations:

The substitute parts operate at a maximum collector current of 25mA, which is lower than the 2N2640 specification of 30mA. Applications requiring collector currents between 25mA and 30mA must be evaluated against actual circuit requirements. The substitute parts feature higher transition frequency (450MHz versus 40MHz) and lower maximum power dissipation (500mW versus 600mW), indicating improved high-frequency performance characteristics.

Compliance and Availability:

All substitute parts maintain unlimited moisture sensitivity level (MSL 1) and REACH unaffected status. The substitute parts are available in active inventory from Analog Devices Inc., with MAT01GHZ offering the highest stock availability (1900 pieces). The transition from RoHS non-compliant to ROHS3 compliant status aligns with current environmental regulations and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAT01 series parts directly replace the 2N2640 in existing designs?

A: The MAT01AH, MAT01AHZ, MAT01GH, and MAT01GHZ parts are mechanically and electrically compatible with the 2N2640 in TO-78-6 through-hole applications. Both the original part and substitute parts are dual NPN transistor arrays with 45V breakdown voltage ratings and identical package form factors. Circuit designs must account for the 25mA maximum collector current specification of the substitute parts versus the 30mA specification of the 2N2640.

Q: What is the difference between MAT01AH, MAT01AHZ, MAT01GH, and MAT01GHZ?

A: All four parts are dual NPN matched pair transistor arrays from Analog Devices Inc. in TO-78-6 packages. MAT01AHZ and MAT01GHZ are supplied in bulk packaging, while MAT01AH and MAT01GH use standard packaging. MAT01GH and MAT01GHZ feature a maximum collector cutoff current of 400nA, compared to 300nA for MAT01AH and MAT01AHZ. All parts share identical electrical ratings for voltage, current, frequency, and power specifications.

Q: Why is the 2N2640 classified as obsolete?

A: The 2N2640 is listed as obsolete by Central Semiconductor Corp. Obsolete classification indicates the manufacturer has discontinued production and support for this part. The substitute parts from Analog Devices Inc. are active products with ongoing manufacturer support, making them suitable for new designs and long-term supply chain planning.

Q: Are there any compliance differences between the 2N2640 and substitute parts?

A: The 2N2640 is RoHS non-compliant, while all substitute parts (MAT01AH, MAT01AHZ, MAT01GH, MAT01GHZ) are ROHS3 compliant. Both the original and substitute parts are REACH unaffected and classified under ECCN EAR99. The improved RoHS compliance of the substitute parts aligns with current environmental regulations and procurement requirements.

Q: What is the significance of the "Matched Pair" designation on the MAT01 parts?

A: The MAT01 series parts are specified as dual NPN matched pair transistors, indicating the two transistors within each package are characterized for matched electrical performance. This matched pair specification provides improved performance in applications requiring balanced dual-transistor operation compared to the standard dual NPN configuration of the 2N2640.

Q: Which substitute part should be selected for new designs?

A: For new designs, MAT01AH or MAT01AHZ are recommended as primary choices, with MAT01GH or MAT01GHZ as alternatives. All four parts meet the electrical and mechanical compatibility requirements. Selection between these parts should be based on packaging preference (standard versus bulk) and specific application requirements for collector cutoff current specifications (300nA versus 400nA).