BC327,116 Equivalent & Substitute Parts

Part Overview

The BC327,116 is a PNP bipolar junction transistor manufactured by NXP USA Inc., rated for 45 V collector-emitter breakdown voltage and 500 mA maximum collector current. This device is packaged in TO-92-3 (TO-226AA) formed leads configuration and is designed for through-hole mounting applications. The part is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Collector Current (Max)	500	mA
Collector-Emitter Breakdown Voltage (Max)	45	V
Power Dissipation (Max)	625	mW
Transition Frequency	80	MHz
Operating Temperature (Max)	150	°C
Package Type	TO-92-3	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the BC327,116 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor type must be PNP
Package must be TO-92-3 (TO-226AA) formed leads
Mounting type must be through hole
Collector-emitter breakdown voltage must be greater than or equal to 45 V
Maximum collector current must be greater than or equal to 500 mA
Maximum power dissipation must be 625 mW
Operating temperature maximum must be 150°C or higher

Secondary Compatibility Factors:

DC current gain (hFE) minimum specifications
Vce saturation characteristics
Transition frequency performance

Substitute parts are grouped into two categories based on collector current rating: parts rated at 500 mA (matching the original specification) and parts rated above 500 mA (600 mA and 800 mA), which provide enhanced current handling capability while maintaining all other critical parameters.

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Power mW	Freq MHz	Temp °C	Status
BC327,116	NXP USA Inc.	500	45	625	80	150	Obsolete
2N3906TA	Fairchild Semiconductor	200	40	625	250	150	Active
2N3906TAR	onsemi	200	40	625	250	150	Active
2N3906TF	onsemi	200	40	625	250	150	Active
2N3906TFR	onsemi	200	40	625	250	150	Active
2N4403TA	onsemi	600	40	625	200	150	Active
2N4403TAR	onsemi	600	40	625	200	150	Active
2N4403TF	onsemi	600	40	625	200	150	Active
2N4403TFR	onsemi	600	40	625	200	150	Active
BC32725TA	onsemi	800	45	625	100	150	Active
BC32740TA	onsemi	800	45	625	100	150	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Highest Compatibility):

The BC32725TA and BC32740TA are the preferred substitutes for the BC327,116. Both parts maintain the 45 V collector-emitter breakdown voltage specification and provide enhanced current handling at 800 mA maximum collector current. These devices are manufactured by onsemi, carry active product status, and are ROHS3 compliant. The BC32725TA features 160 minimum hFE at 100 mA, while the BC32740TA provides 250 minimum hFE at the same operating point, offering design flexibility based on gain requirements.

Secondary Substitutes (Reduced Voltage Rating):

The 2N4403 series (2N4403TA, 2N4403TAR, 2N4403TF, 2N4403TFR) provides 600 mA maximum collector current with active product status and ROHS3 compliance. These parts operate at 40 V collector-emitter breakdown voltage, which is 5 V below the original specification. Application of these devices requires verification that the 40 V rating is acceptable for the target circuit.

Not Recommended:

The 2N3906 series (2N3906TA, 2N3906TAR, 2N3906TF, 2N3906TFR) is not suitable for direct substitution. These devices are rated for only 200 mA maximum collector current, which falls below the 500 mA requirement of the BC327,116. Additionally, the 40 V collector-emitter breakdown voltage is reduced compared to the original specification.

Frequently Asked Questions (FAQ)

Q: Can the 2N3906 series replace the BC327,116?

A: No. The 2N3906 series is rated for 200 mA maximum collector current, which is insufficient for applications requiring the 500 mA capability of the BC327,116. The reduced current rating makes these devices unsuitable for direct substitution.

Q: What is the difference between BC32725TA and BC32740TA?

A: Both devices share identical electrical ratings: 45 V collector-emitter breakdown voltage, 800 mA maximum collector current, 625 mW power dissipation, and 100 MHz transition frequency. The primary difference is DC current gain: BC32725TA provides 160 minimum hFE at 100 mA and 1 V, while BC32740TA provides 250 minimum hFE at the same conditions. Selection depends on circuit gain requirements.

Q: Are the 2N4403 variants interchangeable with each other?

A: The 2N4403TA, 2N4403TAR, 2N4403TF, and 2N4403TFR share identical electrical specifications. Differences exist only in packaging format (Cut Tape) and supplier designation. These variants are electrically interchangeable. However, all 2N4403 devices operate at 40 V collector-emitter breakdown voltage, which is 5 V below the BC327,116 specification.

Q: Does package type affect substitution compatibility?

A: Yes. All substitute parts must use TO-92-3 (TO-226AA) formed leads packaging with through-hole mounting. This requirement ensures mechanical compatibility with existing printed circuit board layouts and assembly processes. Package type is a non-negotiable substitution criterion.

Q: What is the significance of the "TA," "TAR," "TF," and "TFR" suffixes in part numbers?

A: These suffixes denote packaging and tape format specifications. "TA" and "TAR" indicate Cut Tape (CT) packaging, while "TF" and "TFR" also indicate Cut Tape format. These designations do not affect electrical performance; they specify supply format and handling requirements. Selection among these variants depends on procurement and assembly process requirements.

Q: Can I use a substitute with higher collector current rating in place of the BC327,116?

A: Yes. Devices rated for higher maximum collector current (600 mA or 800 mA) can be used in applications designed for 500 mA operation. The higher rating provides design margin and does not compromise circuit function. However, the application circuit must still operate within the voltage and power dissipation limits of the selected substitute.

Q: What compliance certifications apply to these substitute parts?

A: All active substitute parts listed carry ROHS3 compliance and REACH Unaffected status. These certifications ensure compliance with environmental and hazardous substance regulations applicable to electronic components in regulated markets.

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