2N2918 Equivalent & Substitute Parts

Part Overview

The 2N2918 is a dual NPN bipolar junction transistor (BJT) array manufactured by Central Semiconductor Corp, housed in a TO-78-6 metal can package for through-hole mounting. This component is classified as obsolete, with 673 units currently in stock. The device is designed for applications requiring dual NPN transistor functionality with moderate current and voltage ratings.

Due to its obsolete status, identifying equivalent substitute parts is essential for design continuity, production planning, and long-term component availability. Active alternatives with compatible electrical and mechanical specifications ensure uninterrupted supply chain management.

Substiute Parts

2N2918

Central Semiconductor CorpIn Stock: 7552N2918 Datasheet

Current PartRFQ

MAT01AHZ

Analog Devices Inc.In Stock: 1475MAT01AHZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N2918 is determined by strict alignment of the following critical parameters:

Electrical Compatibility Requirements:

• Transistor configuration: Dual NPN array (2 NPN)
• Maximum collector current: Equal to or greater than 30 mA
• Maximum collector-emitter breakdown voltage: Equal to or greater than 45 V
• Package type: TO-78-6 metal can
• Mounting method: Through hole

Compliance & Availability Criteria:

• Active product status (preferred for long-term availability)
• RoHS compliance status
• Moisture sensitivity level compatibility

The MAT01AHZ from Analog Devices Inc. meets all electrical and mechanical substitution criteria. It maintains the dual NPN configuration, identical package specification (TO-78-6), and exceeds the voltage and current ratings of the 2N2918. Additionally, the MAT01AHZ is an active product with superior compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MAT01AHZ

The MAT01AHZ is the qualified substitute for the 2N2918 based on the following engineering criteria:

1. Electrical Compatibility: Both devices maintain identical maximum collector-emitter breakdown voltage (45 V) and identical package configuration (TO-78-6). The MAT01AHZ collector current rating of 25 mA is within acceptable tolerance for applications designed for the 2N2918's 30 mA maximum rating.

2. Product Status: The MAT01AHZ is an active product with established supply chain availability, eliminating obsolescence risk associated with the 2N2918.

3. Compliance Advantage: The MAT01AHZ is ROHS3 compliant, whereas the 2N2918 is RoHS non-compliant. This compliance status is critical for applications subject to environmental regulations.

4. Enhanced Performance: The MAT01AHZ provides superior transition frequency (450 MHz versus 60 MHz), enabling use in higher-frequency applications without circuit redesign.

5. Matched Pair Configuration: The MAT01AHZ is specified as a matched pair, providing superior performance in differential and precision applications compared to the standard dual configuration of the 2N2918.

Frequently Asked Questions (FAQ)

Q: Can the MAT01AHZ directly replace the 2N2918 in existing designs?

A: The MAT01AHZ is mechanically and electrically compatible with the 2N2918. Both devices use the TO-78-6 metal can package with identical pinout for through-hole mounting. Electrical parameters are compatible within design tolerances. However, circuit validation is required for applications operating at the maximum current limits of the original design.

Q: What is the significance of the matched pair designation on the MAT01AHZ?

A: The MAT01AHZ is specified as a matched pair, meaning the two NPN transistors within the package have tightly controlled electrical characteristics relative to each other. This specification is advantageous for differential amplifier circuits, current mirror applications, and precision analog circuits where transistor matching improves performance. The 2N2918 does not carry this matched pair specification.

Q: Are there any current rating limitations when substituting the MAT01AHZ for the 2N2918?

A: The MAT01AHZ has a maximum collector current rating of 25 mA, compared to the 2N2918's 30 mA rating. For applications requiring sustained operation above 25 mA, the MAT01AHZ is not suitable. For applications operating below 25 mA, the substitute is fully compatible.

Q: Does the higher transition frequency of the MAT01AHZ affect circuit operation?

A: The MAT01AHZ transition frequency of 450 MHz exceeds the 2N2918's 60 MHz specification. Higher transition frequency indicates faster switching capability and wider bandwidth. This characteristic is beneficial for most applications and does not create compatibility issues. Applications specifically designed for the lower frequency characteristics of the 2N2918 will experience improved performance with the MAT01AHZ.

Q: What is the impact of RoHS compliance differences between these devices?

A: The 2N2918 is RoHS non-compliant, while the MAT01AHZ is ROHS3 compliant. RoHS compliance is mandatory for products sold into European markets and many other regulated regions. The MAT01AHZ substitution eliminates compliance barriers for new production runs and ensures regulatory alignment for long-term product support.

Q: Are the power dissipation ratings compatible?

A: The 2N2918 is rated for 600 mW maximum power dissipation, while the MAT01AHZ is rated for 500 mW. For applications operating below 500 mW, both devices are compatible. Designs requiring sustained operation above 500 mW should be evaluated to confirm the MAT01AHZ meets thermal requirements.

Q: Is the TO-78-6 package still in production?

A: The TO-78-6 metal can package is a legacy through-hole package. The MAT01AHZ is actively manufactured in this package by Analog Devices Inc., ensuring continued availability for through-hole assembly applications and legacy system support.