BSP135L6906HTSA1 Equivalent & Substitute Parts

Part Overview

The BSP135L6906HTSA1 is an N-Channel 600 V depletion-mode MOSFET manufactured by Infineon Technologies in the SIPMOS® series. This device is rated for 120 mA continuous drain current at 25°C with a maximum power dissipation of 1.8 W and operates across a temperature range of -55°C to 150°C. The component is packaged in PG-SOT223-4-21 (TO-261-4, TO-261AA) surface mount configuration.

The BSP135L6906HTSA1 has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this depletion-mode MOSFET topology.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	120	mA
RDS(on) Max @ Id, Vgs	45	Ohm @ 120mA, 10V
Gate Threshold Voltage (Vgs(th)) Max @ Id	1	V @ 94µA
Gate Charge (Qg) Max @ Vgs	4.9	nC @ 5V
Maximum Gate Voltage (Vgs)	±20	V
Input Capacitance (Ciss) Max @ Vds	146	pF @ 25V
Power Dissipation Max	1.8	W
Operating Temperature Range	-55 to 150	°C
FET Type	N-Channel Depletion Mode	—
Package Type	PG-SOT223-4-21 (TO-261-4, TO-261AA)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the BSP135L6906HTSA1 is determined by equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Drain to Source Voltage (Vdss): 600 V minimum
Continuous Drain Current (Id): 120 mA minimum at 25°C
RDS(on) Max: 45 Ohm or lower @ specified Id and Vgs conditions
Gate Threshold Voltage (Vgs(th)): 1 V maximum @ 94 µA
Gate Charge (Qg): 4.9 nC maximum @ 5 V
Maximum Gate Voltage (Vgs): ±20 V minimum
Input Capacitance (Ciss): 146 pF maximum @ 25 V
Power Dissipation: 1.8 W minimum
Operating Temperature Range: -55°C to 150°C minimum

Mechanical Equivalence Criteria:

FET Type: N-Channel Depletion Mode
Package: PG-SOT223-4 or equivalent (TO-261-4, TO-261AA)
Mounting Type: Surface Mount

Substitute parts are classified into two categories: Parametric Equivalents (identical electrical specifications from the same manufacturer) and Manufacturer-Recommended Alternatives (functionally compatible parts from alternative manufacturers with minor parameter variations within acceptable tolerances).

Parameter Comparison

Parameter	BSP135L6906HTSA1	BSP135H6327XTSA1	BSP135H6906XTSA1	CPC3960ZTR
Manufacturer	Infineon Technologies	Infineon Technologies	Infineon Technologies	IXYS Integrated Circuits Division
Drain to Source Voltage (Vdss)	600 V	600 V	600 V	600 V
Continuous Drain Current (Id) @ 25°C	120 mA	120 mA	120 mA	Not specified
RDS(on) Max @ Id, Vgs	45 Ohm @ 120mA, 10V	45 Ohm @ 120mA, 10V	45 Ohm @ 120mA, 10V	44 Ohm @ 100mA, 0V
Gate Threshold Voltage (Vgs(th)) Max @ Id	1 V @ 94µA	1 V @ 94µA	1 V @ 94µA	Not specified
Gate Charge (Qg) Max @ Vgs	4.9 nC @ 5V	4.9 nC @ 5V	4.9 nC @ 5V	Not specified
Maximum Gate Voltage (Vgs)	±20 V	±20 V	±20 V	±15 V
Input Capacitance (Ciss) Max @ Vds	146 pF @ 25V	146 pF @ 25V	146 pF @ 25V	100 pF @ 25V
Power Dissipation Max	1.8 W	1.8 W	1.8 W	1.8 W
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 125°C
FET Type	N-Channel Depletion Mode	N-Channel Depletion Mode	N-Channel Depletion Mode	N-Channel Depletion Mode
Package	PG-SOT223-4-21	PG-SOT223-4	PG-SOT223-4	SOT-223
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BSP135H6327XTSA1 (Infineon Technologies)

This part is a parametric equivalent to the BSP135L6906HTSA1 with identical electrical specifications across all critical parameters. The BSP135H6327XTSA1 maintains active product status and is ROHS3 compliant. The primary distinction is packaging format (Cut Tape & Digi-Reel® versus the original packaging). This substitute is suitable for direct replacement in applications where the original part is no longer available. The part is available in higher inventory quantities (4460 units).

BSP135H6906XTSA1 (Infineon Technologies)

This part is a parametric equivalent to the BSP135L6906HTSA1 with identical electrical specifications. The BSP135H6906XTSA1 is in active product status and ROHS3 compliant. The packaging format differs (Tape & Reel versus the original packaging). This substitute provides direct functional replacement with the highest inventory availability (15742 units) among all alternatives listed.

CPC3960ZTR (IXYS Integrated Circuits Division)

This part is a manufacturer-recommended alternative from a different manufacturer. The CPC3960ZTR meets the core electrical requirements with a 600 V Vdss rating, 1.8 W power dissipation, and depletion-mode N-Channel topology. Notable parameter variations include: RDS(on) of 44 Ohm (measured at 100 mA, 0 V versus the original 120 mA, 10 V specification), maximum gate voltage of ±15 V (versus ±20 V), input capacitance of 100 pF (versus 146 pF), and maximum operating temperature of 125°C (versus 150°C). The CPC3960ZTR is ROHS3 compliant and in active product status. This substitute is appropriate for applications where the reduced maximum gate voltage and operating temperature ceiling are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the BSP135H6327XTSA1 and BSP135H6906XTSA1 be used interchangeably with the BSP135L6906HTSA1?

A: Yes. Both parts are parametric equivalents with identical electrical specifications. The differences are limited to packaging format (Cut Tape & Digi-Reel® for BSP135H6327XTSA1 and Tape & Reel for BSP135H6906XTSA1 versus the original packaging). All three parts share the same PG-SOT223-4 package footprint and are mechanically compatible.

Q: What are the key differences between the Infineon substitutes and the CPC3960ZTR?

A: The Infineon parts (BSP135H6327XTSA1 and BSP135H6906XTSA1) are parametric equivalents with identical specifications to the original part. The CPC3960ZTR is a manufacturer-recommended alternative with minor variations: maximum gate voltage is ±15 V instead of ±20 V, input capacitance is 100 pF instead of 146 pF, and maximum operating temperature is 125°C instead of 150°C. RDS(on) is measured under different conditions (100 mA, 0 V versus 120 mA, 10 V).

Q: Is the CPC3960ZTR suitable for all applications using the BSP135L6906HTSA1?

A: The CPC3960ZTR is suitable for applications where the reduced maximum gate voltage (±15 V versus ±20 V) and lower maximum operating temperature (125°C versus 150°C) do not conflict with design requirements. Applications requiring operation at the full ±20 V gate voltage or above 125°C junction temperature should use the Infineon parametric equivalents.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both Infineon substitutes (BSP135H6327XTSA1 and BSP135H6906XTSA1) and the IXYS alternative (CPC3960ZTR) are ROHS3 compliant. The original BSP135L6906HTSA1 RoHS status is not specified in the provided data.

Q: What is the difference between the packaging formats of the substitute parts?

A: BSP135H6327XTSA1 is supplied in Cut Tape & Digi-Reel® format. BSP135H6906XTSA1 is supplied in Tape & Reel format. Both use the same PG-SOT223-4 package footprint and are mechanically identical for PCB assembly. The packaging format selection depends on production volume and assembly equipment compatibility.

Q: Which substitute part has the best inventory availability?

A: BSP135H6906XTSA1 has the highest inventory availability with 15742 units in stock, followed by BSP135H6327XTSA1 with 4460 units, and CPC3960ZTR with 2200 units.

Q: Can the CPC3960ZTR be used in high-temperature applications?

A: The CPC3960ZTR has a maximum operating temperature of 125°C, compared to 150°C for the original BSP135L6906HTSA1 and its Infineon equivalents. Applications requiring operation above 125°C junction temperature must use the Infineon parametric equivalents.

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