2N2641 Equivalent & Substitute Parts

Part Overview

The 2N2641 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 1,094 pieces currently in stock. The 2N2641 operates at a maximum collector current of 30mA, collector-emitter breakdown voltage of 45V, and maximum power dissipation of 600mW, with a transition frequency of 40MHz. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and long-term supply chain continuity.

Substiute Parts

2N2641

Central Semiconductor CorpIn Stock: 11602N2641 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 of the 2N2641 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor configuration: 2 NPN (Dual) array
• Collector-emitter breakdown voltage: 45V (minimum requirement)
• Collector current rating: Must support 30mA maximum
• Power dissipation: Must support 600mW maximum
• Transition frequency: 40MHz minimum

Mechanical Compatibility Requirements:

• Package type: TO-78-6 Metal Can (identical pinout and form factor)
• Mounting type: Through Hole

Compliance Considerations:

• RoHS compliance status for new designs
• REACH and ECCN classifications

All substitute parts listed (MAT01AH, MAT01AHZ, MAT01GH, MAT01GHZ) meet or exceed the electrical and mechanical requirements of the 2N2641. These parts are manufactured by Analog Devices Inc. and maintain active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The MAT01 series from Analog Devices Inc. (MAT01AH, MAT01AHZ, MAT01GH, MAT01GHZ) are the qualified equivalents for the 2N2641. These parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory compliance limitations of the original component.

Key Selection Factors:

1. Product Status: All MAT01 variants are active products with established supply chains, eliminating the obsolescence risk associated with the 2N2641.

2. Electrical Performance: The MAT01 series exceeds the 2N2641 specifications in transition frequency (450MHz vs. 40MHz), providing superior high-frequency performance. The maximum collector current of 25mA is lower than the 2N2641's 30mA rating; applications requiring the full 30mA must be evaluated for current margin.

3. Regulatory Compliance: All MAT01 variants are ROHS3 compliant, meeting modern environmental and regulatory requirements. The 2N2641 is RoHS non-compliant and unsuitable for new designs subject to RoHS directives.

4. Packaging: All substitute parts maintain identical TO-78-6 metal can through-hole packaging, ensuring direct mechanical and electrical compatibility without PCB redesign.

5. Matched Pair Characteristics: The MAT01 series is specified as matched pair transistors, providing superior parameter matching compared to the 2N2641. This characteristic is beneficial for differential amplifier and precision circuit applications.

Variant Selection Within MAT01 Series:

• MAT01AH and MAT01AHZ: Identical electrical specifications with 300nA maximum collector cutoff current. MAT01AHZ is supplied in bulk packaging.
• MAT01GH and MAT01GHZ: Identical electrical specifications with 400nA maximum collector cutoff current. MAT01GHZ is supplied in bulk packaging.

Selection between AH and GH variants depends on leakage current requirements; AH variants offer lower leakage. Packaging selection (standard vs. bulk) depends on procurement and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAT01 series directly replace the 2N2641 without circuit modification?

A: The MAT01 series maintains identical TO-78-6 pinout and package configuration, enabling direct mechanical and electrical substitution. However, the reduced maximum collector current (25mA vs. 30mA) requires verification that circuit operating points remain within specification. Applications operating near the 30mA limit must be re-evaluated.

Q: What is the significance of the "matched pair" designation on the MAT01 series?

A: The MAT01 series transistors are factory-matched for electrical parameters, providing tighter tolerances on gain, offset voltage, and temperature coefficients compared to discrete transistor pairs. This characteristic is specified in the part description and benefits precision analog circuits, but does not affect basic substitution compatibility for general-purpose dual NPN applications.

Q: Why is the transition frequency of the MAT01 series (450MHz) significantly higher than the 2N2641 (40MHz)?

A: The MAT01 series represents modern semiconductor technology with improved high-frequency performance. This higher transition frequency does not create compatibility issues; it represents an enhancement. Applications operating below 40MHz will function identically with either part.

Q: Are there differences between MAT01AH, MAT01AHZ, MAT01GH, and MAT01GHZ?

A: The primary differences are packaging format (standard vs. bulk) and collector cutoff current specification. MAT01AH and MAT01AHZ specify 300nA maximum cutoff current, while MAT01GH and MAT01GHZ specify 400nA. The "Z" suffix indicates bulk packaging. Electrical performance is otherwise identical within each pair.

Q: Is the 2N2641 still available for new designs?

A: The 2N2641 is classified as obsolete. While 1,094 pieces are currently in stock, new designs should not be based on this component. The MAT01 series provides active product status with long-term availability and regulatory compliance.

Q: What is the impact of RoHS3 compliance on component selection?

A: RoHS3 compliance is mandatory for products sold in the European Union and increasingly required by global OEMs. The 2N2641 is RoHS non-compliant, making it unsuitable for regulated applications. All MAT01 variants are ROHS3 compliant, meeting current regulatory requirements.

Q: Can the MAT01 series be used in applications where the full 30mA collector current of the 2N2641 is required?

A: The MAT01 series is rated for 25mA maximum collector current. Applications requiring 30mA operation must either accept reduced current margin or select alternative components. Circuit analysis is required to determine if 25mA operation is acceptable for the specific application.