2SB0709AQL Equivalent & Substitute Parts

Part Overview

The 2SB0709AQL is a PNP bipolar junction transistor manufactured by Panasonic Electronic Components, rated for 45 V collector-emitter breakdown voltage and 100 mA maximum collector current. This device is packaged in the Mini3-G1 surface mount configuration (TO-236-3/SC-59/SOT-23-3) and is designed for general-purpose switching and amplification applications with a maximum power dissipation of 200 mW.

The 2SB0709AQL 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 devices must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	45	V
Current - Collector (Ic) (Max)	100	mA
Vce Saturation (Max) @ Ib, Ic	500 mV @ 10 mA, 100 mA	—
Current - Collector Cutoff (Max)	100	µA
DC Current Gain (hFE) (Min) @ Ic, Vce	160 @ 2 mA, 10 V	—
Power - Max	200	mW
Frequency - Transition	80	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the 2SB0709AQL are classified into two categories based on electrical parameter compatibility:

Direct Substitutes (Electrical Equivalents): Parts that maintain the same maximum collector current (100 mA), collector-emitter breakdown voltage (45 V), and saturation voltage characteristics. These devices are pin-compatible and functionally interchangeable within the specified electrical operating range.

Similar Substitutes (Higher Current Capability): Parts that exceed the original specifications in collector current capacity (500 mA) while maintaining the same voltage rating (45 V) and package form factor. These devices provide enhanced current handling capability and are suitable for applications requiring higher current capacity without redesign.

Key Parameters Determining Substitution:

Transistor Type: PNP (mandatory)
Voltage - Collector Emitter Breakdown (Max): ≥ 45 V
Current - Collector (Ic) (Max): ≥ 100 mA
Package / Case: TO-236-3, SC-59, or SOT-23-3 (pin-compatible)
Mounting Type: Surface Mount
Vce Saturation characteristics within acceptable range

Parameter Comparison

Part Number	Manufacturer	Ic (Max)	Vce(BR)	Vce Sat @ Ib, Ic	hFE (Min)	Power (Max)	Frequency	Package	Product Status	RoHS
2SB0709AQL	Panasonic	100 mA	45 V	500 mV @ 10 mA, 100 mA	160 @ 2 mA, 10 V	200 mW	80 MHz	TO-236-3	Obsolete	Non-compliant
MSA1162GT1G	onsemi	100 mA	50 V	500 mV @ 10 mA, 100 mA	200 @ 2 mA, 6 V	200 mW	80 MHz	SC-59	Active	ROHS3 Compliant
2PB709ASL,215	Nexperia USA Inc.	100 mA	45 V	500 mV @ 10 mA, 100 mA	290 @ 2 mA, 10 V	250 mW	80 MHz	TO-236AB	Active	ROHS3 Compliant
BC807-25-7-F	Diodes Incorporated	500 mA	45 V	700 mV @ 50 mA, 500 mA	160 @ 100 mA, 1 V	310 mW	100 MHz	SOT-23-3	Active	ROHS3 Compliant
BC807-25-TP	Micro Commercial Co	500 mA	45 V	700 mV @ 50 mA, 500 mA	160 @ 100 mA, 1 V	300 mW	100 MHz	SOT-23	Active	ROHS3 Compliant
BC807-25LT1G	onsemi	500 mA	45 V	700 mV @ 50 mA, 500 mA	160 @ 100 mA, 1 V	300 mW	100 MHz	SOT-23-3	Active	ROHS3 Compliant
BC807-25LT3G	onsemi	500 mA	45 V	700 mV @ 50 mA, 500 mA	160 @ 100 mA, 1 V	300 mW	100 MHz	SOT-23-3	Active	ROHS3 Compliant
BC857A-HF	Comchip Technology	100 mA	45 V	650 mV @ 5 mA, 100 mA	125 @ 2.2 mA, 5 V	250 mW	100 MHz	SOT-23-3	Active	ROHS3 Compliant
BC857A-TP	Micro Commercial Co	100 mA	45 V	650 mV @ 5 mA, 100 mA	125 @ 2 mA, 5 V	310 mW	200 MHz	SOT-23	Active	ROHS3 Compliant
BC857ALT1G	onsemi	100 mA	45 V	650 mV @ 5 mA, 100 mA	125 @ 2 mA, 5 V	300 mW	100 MHz	SOT-23-3	Active	ROHS3 Compliant
BC857B,215	Nexperia USA Inc.	100 mA	45 V	650 mV @ 5 mA, 100 mA	220 @ 2 mA, 5 V	250 mW	100 MHz	TO-236AB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (100 mA Current Rating):

MSA1162GT1G (onsemi) is the primary direct substitute. This device maintains identical maximum collector current (100 mA), saturation voltage characteristics, and transition frequency (80 MHz) as the 2SB0709AQL. The MSA1162GT1G exceeds the original voltage rating (50 V vs. 45 V), providing enhanced voltage margin. The part is ROHS3 compliant and carries active product status with high inventory availability (155,100 units).

2PB709ASL,215 (Nexperia USA Inc.) provides direct electrical equivalence with identical voltage and current ratings. This device is AEC-Q101 qualified for automotive applications and carries ROHS3 compliance. The higher DC current gain (290 vs. 160) and increased power rating (250 mW vs. 200 mW) offer design margin improvements.

BC857A-HF (Comchip Technology), BC857A-TP (Micro Commercial Co), BC857ALT1G (onsemi), and BC857B,215 (Nexperia USA Inc.) are functionally compatible alternatives with 100 mA maximum collector current. These devices feature higher transition frequencies (100–200 MHz) and improved saturation voltage characteristics. All carry ROHS3 compliance and active product status.

Higher Current Alternatives (500 mA Current Rating):

BC807-25-7-F (Diodes Incorporated), BC807-25-TP (Micro Commercial Co), BC807-25LT1G (onsemi), and BC807-25LT3G (onsemi) provide 500 mA maximum collector current while maintaining the 45 V voltage rating. These devices are suitable for applications requiring enhanced current capacity without circuit redesign. All are ROHS3 compliant with active product status. The BC807-25LT1G and BC807-25LT3G offer the highest inventory availability (293,400 and 305,300 units respectively).

Compliance Considerations:

All recommended substitute parts are ROHS3 compliant, addressing the non-compliant status of the original 2SB0709AQL. Nexperia devices (2PB709ASL,215 and BC857B,215) carry AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Frequently Asked Questions (FAQ)

Q: Can MSA1162GT1G directly replace 2SB0709AQL in existing designs?

A: Yes. MSA1162GT1G maintains identical electrical specifications for maximum collector current (100 mA), saturation voltage (500 mV @ 10 mA, 100 mA), and transition frequency (80 MHz). The package form factor (SC-59/SOT-23-3) is pin-compatible. The higher voltage rating (50 V vs. 45 V) provides additional design margin.

Q: What is the difference between direct substitutes and higher current alternatives?

A: Direct substitutes (MSA1162GT1G, 2PB709ASL,215, BC857 series) maintain the 100 mA maximum collector current specification. Higher current alternatives (BC807 series) provide 500 mA maximum collector current. Higher current devices are suitable only for applications where the increased current capacity does not create thermal or circuit design conflicts.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance status. The original 2SB0709AQL is RoHS non-compliant. Substitution with any recommended part addresses RoHS compliance requirements.

Q: What is the significance of the package designation (TO-236-3, SC-59, SOT-23-3)?

A: These designations refer to the same physical package form factor. TO-236-3, SC-59, and SOT-23-3 are equivalent package specifications for three-lead surface mount transistors. All substitute parts use this package family, ensuring mechanical and electrical pin compatibility.

Q: Can BC857 series parts replace BC807 series parts?

A: No. BC857 series devices are rated for 100 mA maximum collector current, while BC807 series devices are rated for 500 mA. BC857 parts cannot be substituted for BC807 parts in applications requiring higher current capacity. Reverse substitution (BC807 for BC857) is possible only if thermal and circuit design constraints are satisfied.

Q: Which substitute offers the best inventory availability?

A: BC807-25LT3G (onsemi) offers the highest inventory availability at 305,300 units, followed by BC807-25LT1G (onsemi) at 293,400 units. For direct 100 mA equivalents, MSA1162GT1G (onsemi) provides 155,100 units.

Q: What is the significance of the DC Current Gain (hFE) variation among substitutes?

A: DC current gain variation affects base drive requirements and switching speed. The 2SB0709AQL specifies minimum hFE of 160 @ 2 mA, 10 V. Substitutes with higher hFE values (e.g., 2PB709ASL,215 at 290, BC857B,215 at 220) require lower base current for equivalent collector current. Substitutes with lower hFE values (BC857A series at 125) require higher base current. Circuit design must account for these differences in bias network calculations.

Q: Are automotive-qualified alternatives available?

A: Yes. 2PB709ASL,215 (Nexperia USA Inc.) and BC857B,215 (Nexperia USA Inc.) carry AEC-Q101 automotive qualification. These parts are suitable for automotive applications requiring qualified component status.

Q: What operating temperature range should be considered for substitution?

A: The 2SB0709AQL specifies maximum junction temperature of 150°C. Most substitute parts maintain this specification. BC857A-HF extends the range to −65°C to 150°C, and BC857A-TP, BC807-25-7-F, BC807-25-TP, BC807-25LT1G, and BC807-25LT3G specify −55°C to 150°C. Verify operating temperature requirements for the target application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message