2SC39380QL Equivalent & Substitute Parts

Part Overview

The 2SC39380QL is an NPN bipolar junction transistor manufactured by Panasonic Electronic Components, designed for small-signal switching and amplification applications. This device operates at a maximum collector voltage of 40 V with a collector current rating of 100 mA and a transition frequency of 450 MHz. The part is housed in a Surface Mount SMini3-G1 package (SC-70, SOT-323 footprint) with a maximum power dissipation of 150 mW.

The 2SC39380QL is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications. Substitute transistors must satisfy the electrical and mechanical requirements of the original design while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Collector Current (Ic) Maximum	100	mA
Collector-Emitter Breakdown Voltage (Max)	40	V
Power Dissipation (Max)	150	mW
Transition Frequency	450	MHz
Operating Temperature (Junction)	150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-70, SOT-323	—
Vce Saturation (Max)	250 mV @ 1 mA, 10 mA	—
DC Current Gain (hFE) Minimum	60 @ 10 mA, 1 V	—

Substitute Part Grouping Explanation

Substitution of the 2SC39380QL is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Transistor Type: NPN
Collector Current (Ic) Maximum: ≥ 100 mA
Collector-Emitter Breakdown Voltage: ≥ 40 V
Power Dissipation: ≥ 150 mW
Mounting Type: Surface Mount
Package / Case: SC-70, SOT-323 footprint compatibility

Performance Parameters:

Transition Frequency: Minimum 100 MHz (450 MHz for 2SC39380QL)
Operating Temperature: Maximum junction temperature ≥ 150°C
Vce Saturation and DC Current Gain characteristics

Substitute parts are grouped into two categories:

Category 1: Reduced Voltage Rating Substitutes (30 V Vce) BC848AW RFG, BC848BW RFG, BC848BWT106, BC848BWT1G, BC848CW RFG, and BC848CWT1G operate at a maximum collector-emitter breakdown voltage of 30 V. These parts are suitable for applications where the 40 V rating of the original part is not required and where the design operates within 30 V specifications.

Category 2: Matched Voltage Rating Substitute (40 V Vce) SMMBT3904WT1G maintains the 40 V collector-emitter breakdown voltage rating of the original 2SC39380QL. This part is suitable for direct substitution in applications requiring the full 40 V voltage capability.

Parameter Comparison

Parameter	2SC39380QL	BC848AW RFG	BC848BW RFG	BC848BWT106	BC848BWT1G	BC848CW RFG	BC848CWT1G	SMMBT3904WT1G
Manufacturer	Panasonic	Taiwan Semiconductor	Taiwan Semiconductor	Rohm	onsemi	Taiwan Semiconductor	Fairchild	onsemi
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Ic (Max) [mA]	100	100	100	100	100	100	100	200
Vce Breakdown (Max) [V]	40	30	30	30	30	30	30	40
Power Dissipation (Max) [mW]	150	200	200	200	150	200	150	150
Transition Frequency [MHz]	450	100	100	200	100	100	100	300
Operating Temperature (TJ) [°C]	150	-55 to 150	-55 to 150	150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package / Case	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323	SC-70, SOT-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Voltage-Matched Substitution:

SMMBT3904WT1G is the appropriate choice when the 40 V collector-emitter breakdown voltage rating of the 2SC39380QL must be maintained. This part is manufactured by onsemi, carries Active product status, and is RoHS3 compliant. The SMMBT3904WT1G supports higher collector current (200 mA) and transition frequency (300 MHz) compared to the original part, providing enhanced performance margins. This part is qualified to AEC-Q101 automotive standards and is suitable for applications requiring automotive-grade reliability.

For Reduced Voltage Applications:

When the design operates within 30 V collector-emitter voltage specifications, the BC848 series substitutes are available. Among these options:

BC848BWT1G (onsemi) and BC848CWT1G (Fairchild) both provide 150 mW power dissipation matching the original part specification and support operating temperatures from -55°C to 150°C.
BC848BWT106 (Rohm) offers 200 MHz transition frequency, providing improved high-frequency performance over other BC848 variants.
BC848CW RFG and BC848CW RFG (Taiwan Semiconductor) provide the highest DC current gain (hFE = 420 @ 2 mA, 5 V) among the BC848 series.

All substitute parts listed are manufactured by established semiconductor suppliers, carry Active product status, and are RoHS3 compliant. All parts maintain the SC-70 / SOT-323 surface mount package footprint, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can BC848 series transistors directly replace the 2SC39380QL in all applications?

A: BC848 series transistors are suitable for substitution only in applications where the collector-emitter breakdown voltage requirement does not exceed 30 V. The 2SC39380QL is rated for 40 V operation. If your design operates at voltages above 30 V, use SMMBT3904WT1G instead.

Q: What is the primary difference between SMMBT3904WT1G and the BC848 substitutes?

A: SMMBT3904WT1G maintains the 40 V collector-emitter breakdown voltage rating of the original 2SC39380QL and supports higher collector current (200 mA versus 100 mA). BC848 series parts are rated for 30 V maximum and 100 mA collector current. SMMBT3904WT1G also carries AEC-Q101 automotive qualification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. The original 2SC39380QL is RoHS non-compliant. Substitution with any listed part improves environmental and regulatory compliance.

Q: Do the substitute parts fit the same PCB footprint as the 2SC39380QL?

A: Yes. All substitute parts use the SC-70 / SOT-323 surface mount package, which provides identical PCB footprint compatibility with the original 2SC39380QL.

Q: Which substitute offers the best high-frequency performance?

A: SMMBT3904WT1G provides the highest transition frequency at 300 MHz, compared to 450 MHz for the original part and 100-200 MHz for BC848 series variants. BC848BWT106 (Rohm) offers 200 MHz among the BC848 options.

Q: Can I use BC848AW RFG as a substitute?

A: BC848AW RFG is suitable for applications operating within 30 V specifications. This part provides the lowest DC current gain (hFE = 110 @ 2 mA, 5 V) among the BC848 variants and is manufactured by Taiwan Semiconductor with Active product status and RoHS3 compliance.

Q: What is the difference between BC848BW RFG and BC848BWT1G?

A: Both parts are NPN transistors with 30 V Vce rating and 100 mA collector current. BC848BW RFG is manufactured by Taiwan Semiconductor with 200 mW power dissipation. BC848BWT1G is manufactured by onsemi with 150 mW power dissipation and lower collector cutoff current (15 nA versus 100 nA). Both support -55°C to 150°C operating temperature range.

Q: Is the 2SC39380QL still available for purchase?

A: The 2SC39380QL is classified as obsolete. Substitute parts with Active product status should be used for new designs and ongoing production requirements.

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