BC327G Equivalent & Substitute Parts

Part Overview

The BC327G is a PNP bipolar junction transistor manufactured by onsemi, rated for 45V collector-emitter breakdown voltage and 800mA maximum collector current. This device is packaged in a Through Hole TO-92 (TO-226-3) configuration and is classified as obsolete. The BC327G is suitable for general-purpose switching and amplification applications in consumer and industrial electronics.

Due to its obsolete product status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and component sourcing. Active alternatives with compatible electrical and mechanical parameters are available from the same manufacturer.

Key Parameters

Parameter	BC327G Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	800	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA	V
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 100mA, 1V	—
Power - Max	625	mW
Frequency - Transition	260	MHz
Operating Temperature	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226-3)	—

Substitute Part Grouping Explanation

Substitution of the BC327G is determined by the following critical parameters:

Electrical Compatibility Requirements:

Transistor Type: PNP (mandatory match)
Current - Collector (Ic) Max: 800 mA (minimum requirement)
Voltage - Collector Emitter Breakdown: 45 V (minimum requirement)
Power Dissipation: 625 mW or greater (minimum requirement)

Mechanical Compatibility Requirements:

Mounting Type: Through Hole or Surface Mount (application-dependent)
Package / Case: TO-92-3 (Through Hole) or SOT-23-3 (Surface Mount)

Compliance and Status:

Product Status: Active preferred for ongoing availability
RoHS Compliance: ROHS3 Compliant preferred for regulatory alignment

Substitute parts are grouped into two categories:

Category 1: Through Hole TO-92-3 Direct Replacements BC32725BU and BC32740BU maintain identical mechanical form factor and electrical ratings. These parts are active products with enhanced availability and RoHS3 compliance.

Category 2: Surface Mount SOT-23-3 Alternative BCW68GLT1G provides electrical equivalence with reduced power dissipation (225 mW) and different package form factor. This part is suitable for applications where surface mount technology is preferred or required.

Parameter Comparison

Parameter	BC327G	BC32725BU	BC32740BU	BCW68GLT1G	Unit
Transistor Type	PNP	PNP	PNP	PNP	—
Current - Collector (Ic) Max	800	800	800	800	mA
Voltage - Collector Emitter Breakdown (Max)	45	45	45	45	V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA	1.5V @ 30mA, 300mA	V
Current - Collector Cutoff (Max)	100	100	100	20	nA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 100mA, 1V	160 @ 100mA, 1V	250 @ 100mA, 1V	120 @ 10mA, 1V	—
Power - Max	625	625	625	225	mW
Frequency - Transition	260	100	100	100	MHz
Operating Temperature	-55 to 150	—	—	-55 to 150	°C
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount	—
Package / Case	TO-92-3	TO-92-3	TO-92-3	SOT-23-3	—
Product Status	Obsolete	Active	Active	Active	—
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

For Through Hole Applications (Direct Mechanical Replacement):

BC32725BU and BC32740BU are active products suitable for direct replacement of BC327G in through hole PCB designs. Both parts maintain the TO-92-3 package form factor and satisfy all electrical requirements. BC32725BU and BC32740BU are ROHS3 compliant, providing regulatory alignment for modern manufacturing environments. Inventory availability is significantly higher for both active alternatives compared to the obsolete BC327G.

BC32740BU offers the highest DC current gain (hFE Min = 250 @ 100mA, 1V) among through hole options, while BC32725BU provides intermediate gain characteristics (hFE Min = 160 @ 100mA, 1V). Both parts operate at reduced transition frequency (100 MHz) compared to BC327G (260 MHz), which is acceptable for general-purpose switching applications but may require circuit evaluation for high-frequency designs.

For Surface Mount Applications (Alternative Technology):

BCW68GLT1G provides electrical equivalence in a surface mount SOT-23-3 package. This part is suitable for new designs or PCB redesigns incorporating surface mount technology. BCW68GLT1G is ROHS3 compliant and maintains the full operating temperature range (-55°C to 150°C). The reduced power dissipation rating (225 mW versus 625 mW) reflects the smaller package size and requires thermal design consideration for high-current applications.

BCW68GLT1G exhibits higher Vce saturation voltage (1.5V @ 30mA, 300mA) and lower collector cutoff current (20 nA) compared to through hole alternatives, which may affect circuit performance in precision switching applications.

Compliance and Availability:

All three substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of BC327G. Active product status ensures long-term availability and supply chain stability for BC32725BU, BC32740BU, and BCW68GLT1G.

Frequently Asked Questions (FAQ)

Q: Can BC32725BU or BC32740BU be used as direct replacements for BC327G without PCB modification?

A: Yes. BC32725BU and BC32740BU are mechanically and electrically compatible with BC327G. Both parts use the identical TO-92-3 through hole package and satisfy all electrical requirements. No PCB modification is required for pin-to-pin substitution.

Q: What is the difference between BC32725BU and BC32740BU?

A: Both parts are electrically and mechanically identical except for DC current gain specifications. BC32740BU has a minimum hFE of 250 @ 100mA, 1V, while BC32725BU has a minimum hFE of 160 @ 100mA, 1V. Selection depends on circuit requirements for current gain. Both parts operate at 100 MHz transition frequency and are suitable for general-purpose switching applications.

Q: Why does BCW68GLT1G have lower power dissipation (225 mW) than BC327G (625 mW)?

A: BCW68GLT1G is packaged in a smaller SOT-23-3 surface mount form factor, which has reduced thermal mass and lower power handling capability compared to the larger TO-92-3 through hole package. The lower power rating reflects the physical constraints of the smaller package, not a reduction in electrical performance. Applications requiring sustained high-power dissipation should use through hole alternatives.

Q: Is BCW68GLT1G suitable for high-frequency applications?

A: BCW68GLT1G operates at 100 MHz transition frequency, identical to BC32725BU and BC32740BU. This is lower than BC327G (260 MHz). For applications requiring transition frequencies above 100 MHz, circuit evaluation is necessary to confirm performance. BCW68GLT1G is suitable for general-purpose switching and low-frequency amplification applications.

Q: What is the impact of higher Vce saturation voltage in BCW68GLT1G?

A: BCW68GLT1G exhibits Vce saturation of 1.5V @ 30mA, 300mA, compared to 700mV @ 50mA, 500mA for BC327G and through hole alternatives. Higher saturation voltage increases power dissipation during saturation and may affect switching speed in precision circuits. Circuit simulation or testing is appropriate for applications sensitive to saturation voltage characteristics.

Q: Are all substitute parts RoHS compliant?

A: Yes. BC32725BU, BC32740BU, and BCW68GLT1G are all ROHS3 compliant. BC327G compliance status is not specified in available documentation. All substitute parts meet current regulatory requirements for lead-free manufacturing and hazardous substance restrictions.

Q: What is the inventory status of substitute parts?

A: BC32725BU has 17,100 pieces in stock, BC32740BU has 11,398 pieces in stock, and BCW68GLT1G has 227,100 pieces in stock. All substitute parts are active products with established supply chains, compared to BC327G which is obsolete with limited remaining inventory (734 pieces).

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