BSP135H6433XTMA1 Equivalent & Substitute Parts

Part Overview

The BSP135H6433XTMA1 is an N-Channel 600V 120mA depletion-mode MOSFET manufactured by Infineon Technologies in SOT-223 surface mount packaging. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement. The part operates across a temperature range of -55°C to 150°C (TJ) with a maximum power dissipation of 1.8W and is RoHS3 compliant with MSL Level 1 (unlimited moisture sensitivity).

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	600	V
Continuous Drain Current (Id) @ 25°C	120	mA
Rds On (Max) @ 120mA, 10V	45	Ohm
Gate Threshold Voltage (Vgs(th)) @ 94µA	1	V
Gate Charge (Qg) @ 5V	4.9	nC
Input Capacitance (Ciss) @ 25V	146	pF
Power Dissipation (Max)	1.8	W
Operating Temperature Range	-55 to 150	°C
FET Type	N-Channel Depletion Mode
Mounting Type	Surface Mount SOT-223

Substitute Part Grouping Explanation

Substitution eligibility for the BSP135H6433XTMA1 is determined by the following critical parameters:

Electrical Equivalence Criteria:

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

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package: SOT-223 / TO-261-4 / TO-261AA footprint compatibility
Supplier Device Package designation

Compliance Requirements:

RoHS3 Compliant
MSL Level 1 (Unlimited)
REACH Unaffected
ECCN: EAR99

Substitute parts are classified into two groups: Parametric Equivalents (identical electrical specifications with active product status) and Manufacturer Recommended Alternatives (enhanced performance characteristics within the same voltage and package class).

Parameter Comparison

Parameter	BSP135H6433XTMA1	BSP135H6327XTSA1	BSP135H6906XTSA1	STN1HNK60
Manufacturer	Infineon Technologies	Infineon Technologies	Infineon Technologies	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Vdss	600V	600V	600V	600V
Id @ 25°C	120mA	120mA	120mA	400mA
Rds On (Max)	45Ohm @ 120mA, 10V	45Ohm @ 120mA, 10V	45Ohm @ 120mA, 10V	8.5Ohm @ 500mA, 10V
Vgs(th) (Max)	1V @ 94µA	1V @ 94µA	1V @ 94µA	3.7V @ 250µA
Qg (Max)	4.9nC @ 5V	4.9nC @ 5V	4.9nC @ 5V	10nC @ 10V
Ciss (Max)	146pF @ 25V	146pF @ 25V	146pF @ 25V	156pF @ 25V
Power Dissipation (Max)	1.8W	1.8W	1.8W	3.3W
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package	SOT-223	PG-SOT223-4	PG-SOT223-4	SOT-223
Packaging Format	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Parametric Equivalent Selection (BSP135H6327XTSA1 and BSP135H6906XTSA1):

The BSP135H6327XTSA1 and BSP135H6906XTSA1 are direct parametric equivalents to the obsolete BSP135H6433XTMA1. Both devices maintain identical electrical specifications across all critical parameters: 600V Vdss, 120mA continuous drain current, 45 Ohm Rds On, 1V gate threshold voltage, 4.9 nC gate charge, and 146 pF input capacitance. Both are active products from Infineon Technologies with RoHS3 compliance and MSL Level 1 rating. The primary distinction is packaging format: BSP135H6327XTSA1 is supplied in Cut Tape & Digi-Reel format, while BSP135H6906XTSA1 is supplied in Tape & Reel format. Selection between these two should be based on procurement and assembly line requirements.

Manufacturer Recommended Alternative (STN1HNK60):

The STN1HNK60 from STMicroelectronics is a manufacturer-recommended alternative that maintains the 600V voltage rating and SOT-223 package compatibility. This device offers enhanced performance characteristics: 400mA continuous drain current (versus 120mA), 8.5 Ohm Rds On (versus 45 Ohm), and 3.3W power dissipation (versus 1.8W). The STN1HNK60 is an active product with RoHS3 compliance and MSL Level 1 rating. This alternative is suitable for applications requiring higher current capacity or lower on-resistance performance within the same voltage class and package footprint. Gate threshold voltage is 3.7V (versus 1V), and gate charge is 10 nC (versus 4.9 nC), which may affect gate drive circuit requirements.

Compliance and Availability:

All substitute parts maintain full RoHS3 compliance, REACH unaffected status, and MSL Level 1 moisture sensitivity rating. The parametric equivalents (BSP135H6327XTSA1 and BSP135H6906XTSA1) are preferred for direct replacement in existing designs due to identical electrical specifications. The STN1HNK60 is recommended only when enhanced performance characteristics align with application requirements.

Frequently Asked Questions (FAQ)

Q: Can BSP135H6327XTSA1 or BSP135H6906XTSA1 be used as direct replacements for the obsolete BSP135H6433XTMA1?

A: Yes. Both BSP135H6327XTSA1 and BSP135H6906XTSA1 are parametric equivalents with identical electrical specifications. They maintain the same 600V Vdss, 120mA drain current, 45 Ohm Rds On, and all other critical parameters. The difference is packaging format (Cut Tape vs. Tape & Reel). Both are active products suitable for direct substitution.

Q: What is the difference between BSP135H6327XTSA1 and BSP135H6906XTSA1?

A: The electrical specifications are identical. The primary difference is the packaging format: BSP135H6327XTSA1 is supplied in Cut Tape & Digi-Reel format, while BSP135H6906XTSA1 is supplied in Tape & Reel format. Selection depends on your assembly line equipment and procurement preferences.

Q: Can the STN1HNK60 replace the BSP135H6433XTMA1 in all applications?

A: The STN1HNK60 maintains 600V voltage rating and SOT-223 package compatibility, but has different electrical characteristics. It offers higher drain current (400mA vs. 120mA), lower Rds On (8.5 Ohm vs. 45 Ohm), higher gate threshold voltage (3.7V vs. 1V), and higher gate charge (10 nC vs. 4.9 nC). Use STN1HNK60 only when these enhanced performance characteristics are compatible with your circuit design and gate drive requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. BSP135H6327XTSA1, BSP135H6906XTSA1, and STN1HNK60 are all RoHS3 compliant with MSL Level 1 (unlimited) moisture sensitivity rating and REACH unaffected status.

Q: What is the significance of the depletion-mode FET feature in the BSP135H6433XTMA1?

A: The depletion-mode characteristic is specified for the BSP135H6433XTMA1 and maintained in the parametric equivalents BSP135H6327XTSA1 and BSP135H6906XTSA1. This feature affects gate drive circuit design. The STN1HNK60 does not specify depletion-mode operation, indicating it may be an enhancement-mode device. Verify gate drive compatibility when considering the STN1HNK60.

Q: Is the SOT-223 package footprint identical across all substitute parts?

A: Yes. All substitute parts use SOT-223 / TO-261-4 / TO-261AA package designation, ensuring mechanical and footprint compatibility. However, verify the specific supplier device package designation (SOT-223 vs. PG-SOT223-4) with your PCB layout to confirm pin assignment compatibility.

Q: What inventory levels are available for each substitute part?

A: BSP135H6327XTSA1 has 4,460 pieces in stock, BSP135H6906XTSA1 has 15,742 pieces in stock, and STN1HNK60 has 29,200 pieces in stock. The original BSP135H6433XTMA1 (obsolete) has 768 pieces remaining in stock.

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