BSP615S2L Equivalent & Substitute Parts

Part Overview

The BSP615S2L is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 2.8A continuous drain current in a surface mount SOT223-4 package. This device is classified as obsolete product status. Due to its obsolete classification, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production and legacy system support.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	2.8	A
Rds On (Max) @ Id, Vgs	90 mOhm @ 1.4A, 10V	mOhm
Gate Threshold Voltage (Vgs(th)) (Max)	2	V @ 12µA
Gate Charge (Qg) (Max) @ Vgs	10	nC @ 10V
Input Capacitance (Ciss) (Max) @ Vds	330	pF @ 25V
Power Dissipation (Max)	1.8	W
Operating Temperature Range	-55 to 150	°C
Package Type	SOT223-4 (TO-261-4, TO-261AA)	—
Mounting Type	Surface Mount	—
Technology	MOSFET (Metal Oxide)	—
FET Type	N-Channel	—

Substitute Part Grouping Explanation

Substitution of the BSP615S2L is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss) must equal or exceed 55V
Continuous Drain Current (Id) must equal or exceed 2.8A
Gate-Source Voltage (Vgs) maximum rating must accommodate ±20V operation
Operating temperature range must span -55°C to 150°C minimum
On-state resistance (Rds On) characteristics must support the application's current and voltage requirements

Mechanical Compatibility Criteria:

Package type must be SOT223 (TO-261-4 or TO-261AA equivalent)
Surface mount configuration required
Moisture Sensitivity Level (MSL) of 1 (Unlimited) acceptable
Pin configuration must match SOT223-4 standard

Functional Compatibility:

N-Channel MOSFET technology (Metal Oxide)
RoHS compliance status (ROHS3 preferred for new designs)
REACH compliance status (REACH Unaffected acceptable)

The substitute parts listed below meet or exceed these criteria while offering active product status and improved availability.

Parameter Comparison

Parameter	BSP615S2L (Main)	BUK7880-55A/CUX	BUK9880-55A/CUX	NTF3055-100T1G	STN3NF06L
Manufacturer	Infineon	Nexperia USA Inc.	Nexperia USA Inc.	onsemi	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active
Vdss (V)	55	55	55	60	60
Id @ 25°C (A)	2.8	7	7	3	4
Rds On (Max) (mOhm)	90 @ 1.4A, 10V	80 @ 10A, 10V	73 @ 8A, 10V	110 @ 1.5A, 10V	100 @ 1.5A, 10V
Vgs(th) (Max) (V)	2 @ 12µA	4 @ 1mA	2 @ 1mA	4 @ 250µA	2.8 @ 250µA
Qg (Max) (nC)	10 @ 10V	12 @ 10V	11 @ 5V	22 @ 10V	9 @ 5V
Ciss (Max) (pF)	330 @ 25V	500 @ 25V	584 @ 25V	455 @ 25V	340 @ 25V
Power Dissipation (Max) (W)	1.8	8	8	1.3	3.3
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 175	-55 to 150
Package	SOT223-4	SOT-223	SOT-223	SOT-223	SOT-223
Vgs (Max) (±V)	20	20	15	20	16
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	Yes (AEC-Q100)	Yes (AEC-Q100)	—	—

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

BUK9880-55A/CUX (Nexperia USA Inc.) is the preferred substitute for the BSP615S2L. This device maintains the 55V Vdss rating and exceeds the 2.8A continuous drain current requirement with 7A capability. The BUK9880-55A/CUX offers superior on-state resistance (73 mOhm @ 8A, 10V) compared to the original part, resulting in lower power dissipation and improved thermal performance. The part carries active product status, ROHS3 compliance, and AEC-Q100 automotive qualification. Inventory availability is substantial at 248,200 pieces. The lower gate threshold voltage (2V @ 1mA) matches the original part's drive characteristics.

BUK7880-55A/CUX (Nexperia USA Inc.) serves as an alternative primary substitute, also maintaining 55V Vdss with 7A continuous drain current. This variant offers 80 mOhm on-state resistance and is available in Tape & Reel packaging. It carries identical compliance certifications (ROHS3, AEC-Q100) and active product status. The higher gate threshold voltage (4V @ 1mA) may require circuit evaluation for gate drive compatibility.

Secondary Substitutes (For Specific Applications):

STN3NF06L (STMicroelectronics) provides a 60V Vdss rating with 4A continuous drain current, exceeding the original part's current specification. This device offers 100 mOhm on-state resistance and 3.3W power dissipation capability. The STN3NF06L carries ROHS3 compliance and active product status with 72,446 pieces in inventory. The gate threshold voltage of 2.8V @ 250µA provides intermediate drive characteristics between the primary substitutes.

NTF3055-100T1G (onsemi) offers 60V Vdss with 3A continuous drain current, closely matching the original part's current rating. This device provides extended operating temperature range to 175°C and carries ROHS3 compliance with active product status. The higher gate charge (22 nC @ 10V) and on-state resistance (110 mOhm @ 1.5A, 10V) may result in increased switching losses and power dissipation compared to the original part.

Compliance and Availability Considerations:

All substitute parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The BSP615S2L is RoHS non-compliant, making substitution necessary for new designs subject to RoHS directives. The Nexperia devices (BUK7880-55A/CUX and BUK9880-55A/CUX) carry AEC-Q100 automotive qualification, suitable for automotive and industrial applications requiring enhanced reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the BUK9880-55A/CUX directly replace the BSP615S2L without circuit modifications?

A: The BUK9880-55A/CUX is mechanically and electrically compatible with the BSP615S2L. Both devices use the SOT223 package with identical pinout (TO-261-4, TO-261AA). The substitute part exceeds the original specifications in drain current (7A vs. 2.8A) and offers superior on-state resistance (73 mOhm vs. 90 mOhm). The gate threshold voltage (2V @ 1mA) matches the original part's drive characteristics. Direct substitution is supported without circuit modifications.

Q: What is the primary advantage of using BUK9880-55A/CUX over the original BSP615S2L?

A: The BUK9880-55A/CUX offers active product status with guaranteed long-term availability, ROHS3 compliance for regulatory adherence, AEC-Q100 automotive qualification for enhanced reliability, and superior electrical performance with lower on-state resistance. The original part is obsolete, making the substitute necessary for production continuity.

Q: Are there differences in gate drive requirements between the substitute parts?

A: Yes. The BUK9880-55A/CUX and STN3NF06L have gate threshold voltages of 2V and 2.8V respectively, matching the original part's 2V specification. The BUK7880-55A/CUX has a higher threshold voltage of 4V @ 1mA, which may require evaluation of gate drive circuit performance. The NTF3055-100T1G has a 4V threshold voltage, similar to the BUK7880-55A/CUX. Verify gate drive voltage compatibility with your circuit design.

Q: Which substitute part offers the best thermal performance?

A: The BUK9880-55A/CUX and BUK7880-55A/CUX both offer 8W maximum power dissipation, significantly exceeding the original part's 1.8W rating. The STN3NF06L provides 3.3W power dissipation. The NTF3055-100T1G offers 1.3W, lower than the original part. For thermal-limited applications, the Nexperia devices provide superior heat dissipation capability.

Q: Is the package pinout identical across all substitute parts?

A: Yes. All substitute parts use the SOT223 package (TO-261-4, TO-261AA), which maintains identical pinout with the original BSP615S2L. Surface mount placement and PCB footprints are directly compatible without modification.

Q: What is the difference between BUK9880-55A/CUX and BUK7880-55A/CUX packaging options?

A: The BUK9880-55A/CUX is supplied in Cut Tape (CT) & Digi-Reel® packaging, while the BUK7880-55A/CUX is supplied in Tape & Reel (TR) packaging. Both are surface mount configurations suitable for automated assembly. Select based on your procurement and assembly process requirements.

Q: Can the STN3NF06L be used in applications requiring 55V operation?

A: The STN3NF06L is rated for 60V Vdss, which exceeds the 55V requirement. This device is suitable for 55V applications. However, verify that the higher gate charge (9 nC @ 5V) and different gate threshold voltage (2.8V @ 250µA) are compatible with your gate drive circuit and switching frequency requirements.

Q: What is the moisture sensitivity level for all substitute parts?

A: All substitute parts, including the original BSP615S2L, have a Moisture Sensitivity Level (MSL) of 1 (Unlimited). This indicates no moisture sensitivity restrictions and no special storage or handling requirements beyond standard component handling practices.

Q: Are the substitute parts suitable for automotive applications?

A: The BUK9880-55A/CUX and BUK7880-55A/CUX carry AEC-Q100 automotive qualification and automotive grade designation, making them suitable for automotive applications. The STN3NF06L and NTF3055-100T1G do not carry automotive qualification but are suitable for industrial and consumer applications.

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