BC32725 Equivalent & Substitute Parts

Part Overview

The BC32725 is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This component operates at a maximum collector current of 800 mA with a collector-emitter breakdown voltage of 45 V and delivers a maximum power dissipation of 625 mW. The device is housed in a TO-92-3 through-hole package.

The BC32725 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this transistor.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) (Max)	800	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	700 mV @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 100 mA, 1 V	—
Power - Max	625	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—

Substitute Part Grouping Explanation

Substitution of the BC32725 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Parameters:

Transistor polarity: PNP
Maximum collector current: 800 mA
Collector-emitter breakdown voltage: 45 V
Saturation voltage characteristics: 700 mV @ 50 mA, 500 mA
Collector cutoff current: 100 nA
Minimum DC current gain: 160 @ 100 mA, 1 V
Maximum power dissipation: 625 mW
Transition frequency: 100 MHz
Maximum junction temperature: 150 °C

Mechanical Parameters:

Mounting type: Through Hole
Package designation: TO-92-3 (TO-226AA)

The BC32725BU is identified as a parametric equivalent. This substitute maintains identical electrical specifications and mechanical packaging while differing in product status and packaging format (bulk versus standard).

Parameter Comparison

Parameter	BC32725	BC32725BU	Match
Transistor Type	PNP	PNP	✓
Current - Collector (Ic) (Max)	800 mA	800 mA	✓
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	✓
Vce Saturation (Max) @ Ib, Ic	700 mV @ 50 mA, 500 mA	700 mV @ 50 mA, 500 mA	✓
Current - Collector Cutoff (Max)	100 nA	100 nA	✓
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 100 mA, 1 V	160 @ 100 mA, 1 V	✓
Power - Max	625 mW	625 mW	✓
Frequency - Transition	100 MHz	100 MHz	✓
Operating Temperature (TJ)	150 °C	150 °C	✓
Mounting Type	Through Hole	Through Hole	✓
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	✓
Product Status	Obsolete	Active	—
RoHS Status	Not Specified	ROHS3 Compliant	—

Engineering Selection Recommendations

The BC32725BU is a direct parametric equivalent to the BC32725 across all specified electrical and mechanical parameters. The primary distinction is product status: the BC32725 is obsolete, while the BC32725BU is active.

The BC32725BU carries ROHS3 compliance certification, whereas the BC32725 compliance status is not specified. For applications subject to regulatory requirements mandating RoHS compliance, the BC32725BU satisfies these obligations.

Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99). The BC32725BU is available in bulk packaging format, whereas the BC32725 packaging format is not specified.

From an engineering standpoint, the BC32725BU provides equivalent functional performance with the advantage of active product status and documented RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the BC32725BU be used as a direct replacement for the BC32725?

A: Yes. The BC32725BU maintains identical electrical specifications across all parameters including collector current, breakdown voltage, saturation voltage, current gain, power dissipation, and transition frequency. The mechanical package (TO-92-3) and mounting type (through hole) are identical. Direct substitution is supported at the circuit level.

Q: What is the primary reason to transition from BC32725 to BC32725BU?

A: The BC32725 carries an obsolete product status, creating supply chain risk. The BC32725BU is an active product with documented availability, ensuring long-term sourcing capability. Additionally, the BC32725BU is certified ROHS3 compliant, addressing regulatory requirements.

Q: Are there any differences in electrical performance between these parts?

A: No. Both parts are specified identically across all electrical parameters: maximum collector current (800 mA), collector-emitter breakdown voltage (45 V), saturation voltage (700 mV @ 50 mA, 500 mA), collector cutoff current (100 nA), DC current gain (160 @ 100 mA, 1 V), power dissipation (625 mW), transition frequency (100 MHz), and operating temperature (150 °C).

Q: Is the TO-92-3 package compatible with existing PCB layouts?

A: Yes. Both the BC32725 and BC32725BU utilize the TO-92-3 (TO-226AA) through-hole package. Pin configuration and mechanical dimensions are identical, ensuring compatibility with existing printed circuit board designs and assembly processes.

Q: What compliance certifications apply to the BC32725BU?

A: The BC32725BU is ROHS3 compliant and carries REACH Unaffected status. The ECCN classification is EAR99. The BC32725 carries REACH Unaffected status and EAR99 classification; RoHS compliance status is not specified.

Q: Are there inventory considerations when selecting between these parts?

A: The BC32725 has 2,300 pieces in stock (new original). The BC32725BU has 17,100 pieces in stock (new original, bulk packaging). For applications requiring sustained supply, the BC32725BU offers significantly higher inventory availability.

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