BSV52_D87Z Equivalent & Substitute Parts

Part Overview

The BSV52_D87Z is an NPN bipolar junction transistor manufactured by onsemi, rated for 12 V collector-emitter breakdown voltage and 200 mA maximum collector current in a surface mount SOT-23-3 package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The part delivers 225 mW maximum power dissipation and operates across the temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	12	V
Current - Collector (Ic) (Max)	200	mA
Power - Max	225	mW
Frequency - Transition	400	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the BSV52_D87Z is determined by the following critical parameters:

Transistor Polarity: NPN type required for direct functional replacement
Voltage Rating: Collector-emitter breakdown voltage must equal or exceed 12 V
Current Rating: Maximum collector current must equal or exceed 200 mA
Power Dissipation: Maximum power rating must equal or exceed 225 mW
Package Compatibility: Surface mount SOT-23-3 package required for PCB layout compatibility
Operating Temperature: Must support -55°C to 150°C range

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (Same Voltage/Current Rating): Parts with 12 V breakdown voltage and 200 mA collector current in SOT-23-3 packaging. These provide identical electrical performance within the specified operating envelope.

Category B - Higher Voltage Rated Substitutes: Parts with voltage ratings exceeding 12 V and collector current ratings of 200 mA or greater. These operate within the BSV52_D87Z electrical specifications but provide additional voltage margin. Selection requires verification that higher voltage ratings do not introduce unintended circuit behavior.

Category C - Reduced Current Rated Substitutes: Parts with 100 mA collector current maximum. These are suitable only for applications where the circuit current demand does not exceed 100 mA.

Category D - Non-Compatible Substitutes: Parts with different transistor polarity (PNP) or significantly different package types are not direct substitutes and are excluded from primary consideration.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Vce Breakdown (V)	Ic Max (mA)	Power Max (mW)	Frequency (MHz)	Package	Product Status
BSV52_D87Z	onsemi	NPN	12	200	225	400	SOT-23-3	Obsolete
BSV52LT1G	onsemi	NPN	12	100	225	400	SOT-23-3	Active
MMBT2369ALT1G	onsemi	NPN	15	200	225	—	SOT-23-3	Active
MMBT6429LT1G	onsemi	NPN	45	200	225	700	SOT-23-3	Active
SMMBT2369ALT1G	onsemi	NPN	15	200	225	—	SOT-23-3	Active
BSV52,215	Nexperia USA Inc.	NPN	12	100	250	500	SOT-23-3	Active
2SB1707TL	Rohm Semiconductor	PNP	12	4000	500	250	TSMT3	Active
2SD2653KT146	Rohm Semiconductor	NPN	12	2000	200	360	SMT3	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

MMBT2369ALT1G and SMMBT2369ALT1G: Both parts maintain NPN polarity, SOT-23-3 package compatibility, and 200 mA collector current rating. The 15 V breakdown voltage exceeds the 12 V requirement, providing additional voltage margin. Both are active products with RoHS3 compliance. MMBT2369ALT1G is available in Cut Tape & Digi-Reel packaging with 125,200 units in stock. SMMBT2369ALT1G is available in Tape & Reel packaging with 20,100 units in stock. Selection between these two depends on procurement packaging requirements.

MMBT6429LT1G: This part maintains NPN polarity, SOT-23-3 package, and 200 mA collector current. The 45 V breakdown voltage provides substantial voltage margin above the 12 V specification. Transition frequency of 700 MHz exceeds the 400 MHz specification. This part is active with RoHS3 compliance and 155,200 units in stock. Selection is appropriate for applications requiring enhanced voltage headroom.

Secondary Substitutes (Current-Limited Applications)

BSV52LT1G: This onsemi part maintains identical voltage rating (12 V) and package (SOT-23-3) but reduces maximum collector current to 100 mA. This part is suitable only for circuits where collector current does not exceed 100 mA. Product is active with RoHS3 compliance and 2,140 units in stock.

BSV52,215: This Nexperia part maintains 12 V voltage rating and SOT-23-3 package with 100 mA collector current maximum. The part includes automotive qualification (AEC-Q101) and is rated to 150°C maximum junction temperature. This part is suitable for current-limited applications and automotive environments. Product is active with RoHS3 compliance and 6,759 units in stock.

Non-Compatible Substitutes

2SB1707TL: This Rohm Semiconductor part is PNP polarity, which is incompatible with NPN circuit requirements. Package is TSMT3, not SOT-23-3. This part is not suitable for direct substitution.

2SD2653KT146: This Rohm Semiconductor part is NPN with 12 V rating but features 2 A maximum collector current and SMT3 package. While the higher current rating is compatible, the package type differs from SOT-23-3. This part is not suitable for direct substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can BSV52LT1G replace BSV52_D87Z in all applications?

A: BSV52LT1G is suitable only for applications where the maximum collector current requirement does not exceed 100 mA. The BSV52_D87Z is rated for 200 mA maximum collector current. If the circuit requires 100 mA to 200 mA collector current, BSV52LT1G is not compatible. Verify circuit current requirements before selection.

Q: What is the advantage of MMBT6429LT1G over MMBT2369ALT1G?

A: MMBT6429LT1G provides a 45 V collector-emitter breakdown voltage compared to 15 V for MMBT2369ALT1G. Both maintain 200 mA collector current and SOT-23-3 packaging. MMBT6429LT1G also features 700 MHz transition frequency versus unspecified frequency for MMBT2369ALT1G. Selection depends on circuit voltage requirements and frequency performance needs.

Q: Are MMBT2369ALT1G and SMMBT2369ALT1G electrically identical?

A: Both parts are electrically identical with 15 V breakdown voltage, 200 mA collector current, and 225 mW power rating in SOT-23-3 packages. The difference is packaging format: MMBT2369ALT1G is supplied in Cut Tape & Digi-Reel format, while SMMBT2369ALT1G is supplied in Tape & Reel format. Selection depends on procurement and assembly equipment compatibility.

Q: Why is 2SB1707TL listed as a substitute if it is PNP?

A: 2SB1707TL is listed in the provided substitute list but is not a functional equivalent due to PNP polarity. NPN and PNP transistors have opposite collector-emitter current flow and require different circuit biasing. This part is not suitable for direct replacement in circuits designed for NPN operation.

Q: Is BSV52,215 suitable for automotive applications?

A: Yes. BSV52,215 carries AEC-Q101 automotive qualification and is rated for -55°C to 150°C operating temperature. This part is suitable for automotive-grade applications. However, the 100 mA maximum collector current limits its use to circuits not exceeding this current specification.

Q: What is the impact of selecting a higher voltage-rated substitute?

A: Selecting a substitute with higher breakdown voltage (such as MMBT6429LT1G at 45 V versus the original 12 V specification) does not degrade circuit performance if the circuit is designed for 12 V operation. The higher voltage rating provides additional safety margin and protection against voltage transients. No circuit redesign is required.

Q: Can I use 2SD2653KT146 as a substitute?

A: 2SD2653KT146 is NPN with 12 V rating and 2 A collector current, which exceeds the 200 mA requirement. However, the package is SMT3, not SOT-23-3. Direct substitution requires PCB layout modification to accommodate the different package footprint. Electrical compatibility exists, but mechanical compatibility does not.

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