2SC4548-E-TP Equivalent & Substitute Parts

Part Overview

The 2SC4548-E-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a 400 V collector-emitter breakdown voltage rating with a maximum collector current of 200 mA and 500 mW power dissipation capability in a surface mount SOT-89 package.

The 2SC4548-E-TP is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this transistor.

Substiute Parts

2SC4548-E-TP

Micro Commercial CoIn Stock: 401812SC4548-E-TP Datasheet

Current PartRFQ

FCX458TA

Diodes IncorporatedIn Stock: 31357FCX458TA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC4548-E-TP is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Transistor type must be NPN
• Collector-emitter breakdown voltage must be greater than or equal to 400 V
• Maximum collector current must be greater than or equal to 200 mA
• Maximum power dissipation must be greater than or equal to 500 mW
• DC current gain (hFE) must meet or exceed 100 @ 50mA, 10V
• Vce saturation characteristics must support the application requirements

Mechanical Compatibility Criteria:

• Package type must be TO-243AA or equivalent SOT-89 variant
• Mounting type must be surface mount
• Pin configuration must be compatible with existing PCB layouts

Compliance Criteria:

• RoHS3 compliance required
• Moisture sensitivity level MSL 1 or better

The FCX458TA from Diodes Incorporated meets all substitution criteria and is classified as an active product, providing long-term supply availability.

Parameter Comparison

Engineering Selection Recommendations

The FCX458TA is a direct substitute for the 2SC4548-E-TP based on the following engineering factors:

Electrical Performance: The FCX458TA meets or exceeds all critical electrical parameters. The substitute device provides higher maximum collector current (225 mA versus 200 mA) and greater power dissipation capability (1 W versus 500 mW), ensuring compatibility with existing circuit designs. The Vce saturation voltage is improved (500 mV versus 600 mV), providing better switching performance. The transition frequency of the original part (70 MHz) exceeds the substitute (50 MHz); however, this difference does not restrict substitution for applications operating within the 50 MHz specification.

Mechanical Compatibility: Both devices utilize the TO-243AA package in SOT-89 configuration with surface mount technology. Pin configurations are compatible with existing PCB layouts.

Compliance and Supply: The FCX458TA is ROHS3 compliant and carries MSL 1 rating, matching the original part specifications. The substitute device is classified as active product status, ensuring long-term availability and supply chain continuity. The 2SC4548-E-TP is obsolete, making the FCX458TA the appropriate selection for new designs and ongoing production support.

Frequently Asked Questions (FAQ)

Q: Can the FCX458TA directly replace the 2SC4548-E-TP in existing circuit designs?

A: Yes. The FCX458TA is electrically and mechanically compatible with the 2SC4548-E-TP. Both devices are NPN transistors with identical 400 V breakdown voltage and 100 minimum DC current gain specifications. The substitute device provides equal or superior performance across all critical parameters and uses the same SOT-89 surface mount package.

Q: What are the key differences between these two transistors?

A: The FCX458TA provides higher maximum collector current (225 mA versus 200 mA), greater power dissipation (1 W versus 500 mW), and improved Vce saturation characteristics (500 mV versus 600 mV). The 2SC4548-E-TP has a higher transition frequency (70 MHz versus 50 MHz). The FCX458TA is an active product, while the 2SC4548-E-TP is obsolete.

Q: Are there any package or pinout differences?

A: Both devices use the TO-243AA package in SOT-89 configuration. The FCX458TA is designated SOT-89-3, which is a standard variant of the SOT-89 package. Pin configurations are compatible, and no PCB layout modifications are required.

Q: Does the lower transition frequency of the FCX458TA affect substitution?

A: The FCX458TA transition frequency of 50 MHz is lower than the 2SC4548-E-TP at 70 MHz. Substitution is appropriate for applications operating at or below 50 MHz. Applications requiring operation above 50 MHz must evaluate frequency-dependent performance characteristics.

Q: Are both devices RoHS compliant?

A: Yes. Both the 2SC4548-E-TP and FCX458TA are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, meeting current environmental and reliability standards.

Q: Why is the 2SC4548-E-TP obsolete?

A: The 2SC4548-E-TP is classified as obsolete by the manufacturer. The FCX458TA is the recommended active substitute, providing equivalent functionality with improved specifications and assured long-term supply availability.

Q: Can the FCX458TA be used in high-temperature applications?

A: The FCX458TA operates across -65°C to 150°C, which exceeds the 2SC4548-E-TP operating range of -55°C to 150°C. The substitute device is suitable for applications requiring extended low-temperature operation.