BCV72 Equivalent & Substitute Parts

Part Overview

The BCV72 is an NPN bipolar junction transistor manufactured by onsemi, housed in a SOT-23-3 surface mount package. This device is rated for 60 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 350 mW maximum power dissipation. The BCV72 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute devices must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	BCV72 Specification	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	60	V
Current - Collector (Ic) (Max)	500	mA
Power - Max	350	mW
Vce Saturation (Max) @ Ib, Ic	250mV @ 500µA, 10mA	V
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	200 @ 2mA, 5V	—
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BCV72 is determined by strict electrical and mechanical compatibility. The following parameters define acceptable substitutes:

Critical Parameters for Substitution:

Transistor Type: NPN (must match)
Package / Case: SOT-23-3 surface mount (must match for PCB compatibility)
Voltage - Collector Emitter Breakdown: must be ≥60 V
Current - Collector (Ic) (Max): must be ≥500 mA
Power - Max: must be ≥350 mW
Operating Temperature Range: must encompass -55°C to 150°C
RoHS Status: ROHS3 Compliant (regulatory requirement)

Substitute parts are grouped into two categories:

Category A: Direct Electrical Equivalents Parts that match or exceed all critical electrical parameters while maintaining the same package and operating temperature range. These include MMBTA05LT1G, MMBTA05LT3G, and NSVMMBTA05LT1G.

Category B: Reduced Current Capability Substitutes Parts with lower maximum collector current (100 mA instead of 500 mA) but compatible voltage ratings and package. These include BC846ALT1G, BC846BLT1G, BC846BLT3G, and MMBT2484LT1G. These are suitable only for applications where collector current does not exceed 100 mA.

Category C: Alternative Voltage/Current Combinations Parts with different voltage or current ratings that may be suitable for specific application requirements. These include 2PD602AQL,215 (50 V, 500 mA), 2SC5866TLQ (60 V, 2 A, different package), and 2SD1484KT146Q (50 V, 500 mA, different package).

Parameter Comparison

Part Number	Manufacturer	Ic (Max) mA	Vce(br) V	Power mW	hFE (Min)	Package	Status	Compliance
BCV72	onsemi	500	60	350	200 @ 2mA, 5V	SOT-23-3	Obsolete	ROHS3
MMBTA05LT1G	onsemi	500	60	225	100 @ 100mA, 1V	SOT-23-3	Active	ROHS3
MMBTA05LT3G	onsemi	500	60	225	100 @ 100mA, 1V	SOT-23-3	Active	ROHS3
NSVMMBTA05LT1G	onsemi	500	60	225	100 @ 100mA, 1V	SOT-23-3	Active	ROHS3
BC846ALT1G	onsemi	100	65	300	110 @ 2mA, 5V	SOT-23-3	Active	ROHS3
BC846BLT1G	onsemi	100	65	300	200 @ 2mA, 5V	SOT-23-3	Active	ROHS3
BC846BLT3G	onsemi	100	65	300	200 @ 2mA, 5V	SOT-23-3	Active	ROHS3
MMBT2484LT1G	onsemi	100	60	225	250 @ 1mA, 5V	SOT-23-3	Active	ROHS3
2PD602AQL,215	Nexperia USA Inc.	500	50	250	85 @ 150mA, 10V	SOT-23-3	Active	ROHS3
2SC5866TLQ	Rohm Semiconductor	2000	60	500	120 @ 100mA, 2V	TSMT3	Active	ROHS3
2SD1484KT146Q	Rohm Semiconductor	500	50	200	120 @ 10mA, 3V	SMT3	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance):

MMBTA05LT1G, MMBTA05LT3G, and NSVMMBTA05LT1G are active production parts from onsemi that maintain the 500 mA collector current rating and 60 V breakdown voltage of the BCV72. All three are ROHS3 compliant with MSL 1 rating. These parts are suitable for applications requiring the full 500 mA current capability. MMBTA05LT1G and MMBTA05LT3G differ only in packaging format (Cut Tape vs. Tape & Reel). NSVMMBTA05LT1G is a Tape & Reel variant. Selection between these three depends on procurement and assembly requirements.

For Current-Limited Applications (≤100 mA):

BC846BLT1G and BC846BLT3G provide higher voltage rating (65 V) with matching DC current gain (hFE 200 @ 2mA, 5V) to the BCV72. These are suitable only for applications where collector current does not exceed 100 mA. BC846ALT1G offers lower hFE (110) but higher voltage margin. MMBT2484LT1G provides the same 60 V rating as BCV72 with higher hFE (250) but is limited to 100 mA operation.

For Reduced Voltage Applications (50 V):

2PD602AQL,215 from Nexperia maintains 500 mA current capability but operates at 50 V maximum breakdown voltage. This part is AEC-Q101 automotive qualified and suitable for applications where 50 V rating is acceptable. 2SD1484KT146Q from Rohm also operates at 50 V with 500 mA capability but uses a different package (SMT3).

For Higher Current Applications (>500 mA):

2SC5866TLQ from Rohm Semiconductor provides 2 A maximum collector current at 60 V rating. This part uses a different package (TSMT3, SC-96) and is not a direct PCB replacement but offers significantly higher current capability for applications requiring it.

All recommended substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. Product status verification confirms all substitutes are in active production, ensuring long-term availability compared to the obsolete BCV72.

Frequently Asked Questions (FAQ)

Q: Can I use BC846BLT1G as a direct replacement for BCV72 in all applications?

A: No. BC846BLT1G is limited to 100 mA maximum collector current, while BCV72 is rated for 500 mA. BC846BLT1G is suitable only for applications where collector current does not exceed 100 mA. For applications requiring 500 mA operation, use MMBTA05LT1G, MMBTA05LT3G, or NSVMMBTA05LT1G.

Q: What is the difference between MMBTA05LT1G and MMBTA05LT3G?

A: Both parts are electrically identical with 500 mA collector current, 60 V breakdown voltage, and identical electrical specifications. The difference is packaging format: MMBTA05LT1G is supplied in Cut Tape (CT) & Digi-Reel format, while MMBTA05LT3G is supplied in Tape & Reel (TR) format. Selection depends on assembly equipment and procurement requirements.

Q: Why does 2PD602AQL,215 have a lower voltage rating (50 V) than BCV72 (60 V)?

A: 2PD602AQL,215 is rated for 50 V maximum collector-emitter breakdown voltage, which is 10 V lower than BCV72. This part is suitable only for applications where the supply voltage and maximum operating voltage do not exceed 50 V. For applications requiring 60 V operation, use MMBTA05LT1G or equivalent 60 V rated parts.

Q: Can I use 2SC5866TLQ as a replacement for BCV72?

A: 2SC5866TLQ is electrically compatible (60 V, 500 mA capable) but uses a different package (TSMT3 instead of SOT-23-3). This part is not a direct PCB replacement and requires different PCB layout and assembly procedures. Use only if PCB redesign is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the BCV72.

Q: What is the difference between BC846ALT1G and BC846BLT1G?

A: Both parts are rated for 100 mA collector current and 65 V breakdown voltage in SOT-23-3 package. The primary difference is DC current gain: BC846ALT1G has hFE minimum of 110 @ 2mA, 5V, while BC846BLT1G has hFE minimum of 200 @ 2mA, 5V. BC846BLT1G provides higher current gain, matching the BCV72 hFE specification more closely.

Q: Why is BCV72 listed as obsolete?

A: BCV72 is classified as obsolete by onsemi, indicating it is no longer in active production. While inventory may still be available (71,200 pcs noted), long-term supply cannot be guaranteed. Active production substitutes ensure design continuity and future availability.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided each part is selected according to its electrical specifications and the application requirements. However, for consistency and simplified inventory management, using a single substitute part across a design is recommended.

Q: What is the significance of the "Frequency - Transition" parameter?

A: Transition frequency (fT) indicates the frequency at which current gain drops to unity. MMBTA05 series parts specify 100 MHz, while BC846 series also specify 100 MHz. BCV72 does not specify this parameter. For high-frequency applications, verify that the selected substitute meets the required frequency performance.

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