BC327-40,112 Equivalent & Substitute Parts

Part Overview

The BC327-40,112 is a PNP bipolar junction transistor (BJT) manufactured by NXP USA Inc., housed in a TO-92-3 through-hole package. This component is rated for 45V collector-emitter breakdown voltage, 500mA maximum collector current, and 625mW power dissipation. The device is classified as obsolete, necessitating identification of active equivalent components for new designs and production continuity. The BC32740BU from onsemi serves as a direct functional equivalent with enhanced electrical performance characteristics while maintaining package and mounting compatibility.

Substiute Parts

BC327-40,112

NXP USA Inc.In Stock: 962BC327-40,112 Datasheet

Current PartRFQ

BC32740BU

onsemiIn Stock: 11460BC32740BU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BC327-40,112 with the BC32740BU is valid based on the following criteria:

Electrical Compatibility Parameters:

• Identical transistor type (PNP)
• Identical maximum collector-emitter breakdown voltage (45V)
• Identical DC current gain specification (250 @ 100mA, 1V)
• Identical saturation voltage characteristics (700mV @ 50mA, 500mA)
• Identical collector cutoff current (100nA)
• Identical maximum power dissipation (625mW)
• Identical operating temperature rating (150°C)

Mechanical Compatibility Parameters:

• Identical package type (TO-92-3)
• Identical mounting configuration (Through Hole)
• Identical lead formation (TO-226AA Formed Leads)

Enhanced Performance Characteristics:

• BC32740BU provides higher maximum collector current (800mA vs. 500mA)
• BC32740BU provides higher transition frequency (100MHz vs. 80MHz)

Compliance and Status:

• BC32740BU maintains ROHS3 compliance
• BC32740BU is active product status, ensuring long-term availability
• Both components are REACH Unaffected

Parameter Comparison

Engineering Selection Recommendations

The BC32740BU from onsemi is a direct functional substitute for the obsolete BC327-40,112 from NXP USA Inc. Selection of the BC32740BU is supported by the following factors:

Product Status Consideration: The BC327-40,112 is classified as obsolete, creating supply chain risk for ongoing production and maintenance applications. The BC32740BU maintains active product status, ensuring continued availability and manufacturer support.

Electrical Equivalence: All critical electrical parameters match or exceed the original specification. The substitute maintains identical voltage ratings, saturation characteristics, and current gain specifications. The enhanced collector current rating (800mA vs. 500mA) and transition frequency (100MHz vs. 80MHz) provide performance margin without introducing incompatibility.

Compliance Alignment: Both components maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for equivalent substitution. Moisture sensitivity classification does not present a barrier to substitution.

Package and Mounting Compatibility: Identical TO-92-3 package configuration and through-hole mounting type ensure direct physical and electrical compatibility in existing PCB designs without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the BC32740BU directly replace the BC327-40,112 in existing designs?

A: Yes. The BC32740BU is electrically and mechanically compatible with the BC327-40,112. Both components share identical package type (TO-92-3), mounting configuration (through-hole), and critical electrical parameters including voltage rating (45V), saturation voltage (700mV @ 50mA, 500mA), and current gain (250 @ 100mA, 1V). No circuit modification is required.

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

A: The BC32740BU provides enhanced performance specifications: maximum collector current is rated at 800mA compared to 500mA for the BC327-40,112, and transition frequency is 100MHz versus 80MHz. These represent performance improvements that do not compromise compatibility. The BC32740BU is an active product, while the BC327-40,112 is obsolete.

Q: Are there any thermal or power dissipation concerns with substitution?

A: No. Both components are rated for identical maximum power dissipation (625mW) and identical operating temperature (150°C). The higher current rating of the BC32740BU does not increase power dissipation limits and does not introduce thermal management concerns.

Q: Do compliance certifications differ between these parts?

A: No. Both components maintain ROHS3 compliance and REACH Unaffected status. Regulatory and environmental compliance requirements are satisfied by either component.

Q: Is the TO-92-3 package identical for both parts?

A: Yes. Both the BC327-40,112 and BC32740BU use the TO-92-3 package with TO-226AA formed leads. Pin configuration, lead spacing, and physical dimensions are identical, enabling direct PCB compatibility without layout changes.

Q: Why is the BC327-40,112 classified as obsolete?

A: The BC327-40,112 is no longer in active production by NXP USA Inc. The BC32740BU from onsemi serves as the active equivalent, providing equivalent functionality with enhanced performance characteristics and assured long-term availability.