BC328-25-AP Equivalent & Substitute Parts

Part Overview

The BC328-25-AP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 800 mA, collector-emitter breakdown voltage of 25 V, and maximum power dissipation of 625 mW in a Through Hole TO-92 package. The BC328-25-AP is classified as obsolete, making identification of equivalent substitute parts necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

BC328-25-AP

Micro Commercial CoIn Stock: 1071BC328-25-AP Datasheet

Current PartRFQ

BC32725TA

onsemiIn Stock: 45382BC32725TA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BC328-25-AP is determined by strict electrical and mechanical compatibility criteria. The following parameters establish the substitution basis:

Critical Matching Parameters:

• Transistor polarity: PNP
• Collector current rating: 800 mA minimum
• Package type: TO-92-3 Through Hole
• DC current gain (hFE): 160 minimum @ 100 mA, 1 V
• Vce saturation: 700 mV @ 50 mA, 500 mA
• Power dissipation: 625 mW minimum
• RoHS3 compliance

Allowable Variation Parameters:

• Collector-emitter breakdown voltage: Equal to or greater than 25 V
• Transition frequency: Equal to or greater than 260 MHz (or lower if application permits)
• Collector cutoff current: Equal to or lower than specified value
• Operating temperature range: Must encompass application requirements

The BC32725TA qualifies as a direct substitute based on matching all critical parameters while exceeding breakdown voltage and maintaining equivalent saturation characteristics and current gain specifications.

Parameter Comparison

Engineering Selection Recommendations

The BC32725TA is a qualified substitute for the BC328-25-AP based on the following engineering criteria:

Electrical Compatibility: The BC32725TA maintains identical collector current (800 mA), saturation voltage (700 mV @ 50 mA, 500 mA), and DC current gain (160 @ 100 mA, 1 V) specifications. The higher collector-emitter breakdown voltage (45 V versus 25 V) provides enhanced voltage margin and does not restrict application scope. The lower transition frequency (100 MHz versus 260 MHz) is acceptable for applications not requiring the higher frequency performance of the original part.

Mechanical Compatibility: Both devices utilize identical TO-92-3 Through Hole packaging with formed leads, ensuring direct mechanical interchangeability without PCB layout modification.

Compliance and Availability: The BC32725TA is ROHS3 compliant and carries active product status with substantial inventory availability (45,300 pieces), ensuring long-term supply continuity. The BC328-25-AP is obsolete with limited remaining stock (1,030 pieces), making transition to the BC32725TA necessary for sustained production.

Application Scope: The BC32725TA is suitable for applications where the original BC328-25-AP was specified, provided that the reduced transition frequency (100 MHz) does not conflict with circuit timing requirements. For applications requiring the full 260 MHz transition frequency capability, alternative substitutes must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the BC32725TA directly replace the BC328-25-AP without circuit modification?

A: Yes. The BC32725TA is mechanically and electrically compatible for direct substitution in Through Hole applications. Both devices share identical TO-92-3 packaging, collector current rating (800 mA), saturation voltage (700 mV @ 50 mA, 500 mA), and DC current gain (160 @ 100 mA, 1 V). No PCB layout changes are required.

Q: What is the significance of the higher breakdown voltage (45 V) in the BC32725TA?

A: The BC32725TA's 45 V collector-emitter breakdown voltage exceeds the BC328-25-AP's 25 V rating. This provides additional voltage margin and does not restrict circuit operation. Applications designed for 25 V operation will function within the BC32725TA's voltage envelope.

Q: Why is the transition frequency lower in the BC32725TA (100 MHz versus 260 MHz)?

A: The BC32725TA exhibits lower transition frequency due to different semiconductor design and manufacturing process. For applications operating below 100 MHz, this difference is not functionally significant. Applications requiring frequencies above 100 MHz must verify compatibility with the reduced transition frequency specification.

Q: Are there any compliance or regulatory differences between these parts?

A: Both the BC328-25-AP and BC32725TA are ROHS3 compliant. The BC32725TA carries REACH Unaffected status. Both devices share identical ECCN (EAR99) and HTSUS (8541.21.0075) classifications.

Q: What is the availability status of each part?

A: The BC328-25-AP is classified as obsolete with 1,030 pieces in stock. The BC32725TA is active with 45,300 pieces available, ensuring sustained supply for new designs and production continuity.

Q: Are there any thermal operating range differences?

A: The BC328-25-AP specifies -55°C to 150°C operating range. The BC32725TA specifies 150°C maximum junction temperature (TJ). For applications requiring the full -55°C lower temperature limit, thermal performance at minimum temperature must be verified against circuit requirements.