BSP129E6327 Equivalent & Substitute Parts

Part Overview

The BSP129E6327 is an N-Channel 240V 350mA MOSFET manufactured by Infineon Technologies in the SIPMOS® series, housed in a PG-SOT223-4 surface mount package. This component is classified as obsolete, indicating discontinuation from active production. Locating equivalent or substitute parts is necessary to support ongoing maintenance, repair, and redesign activities for legacy systems utilizing this device.

Key Parameters

Parameter	Value
Drain to Source Voltage (Vdss)	240 V
Continuous Drain Current (Id) @ 25°C	350 mA (Ta)
Rds On (Max) @ Id, Vgs	6 Ohm @ 350 mA, 10 V
Gate Threshold Voltage (Vgs(th)) @ Id	1 V @ 108 µA
Power Dissipation (Max)	1.8 W (Ta)
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package Type	PG-SOT223-4 (TO-261-4, TO-261AA)
FET Feature	Depletion Mode
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the BSP129E6327 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Drain to Source Voltage (Vdss) must equal or exceed 240 V
Continuous Drain Current (Id) must equal or exceed 350 mA
Rds On (Max) must not exceed 6 Ohm at specified conditions
Gate Threshold Voltage must be compatible with circuit drive requirements
Power Dissipation capability must support 1.8 W minimum
Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

Package type must be PG-SOT223-4 or equivalent footprint (TO-261-4, TO-261AA)
Surface mount configuration required
Pin configuration must match original device

Regulatory & Compliance Criteria:

RoHS compliance status
REACH compliance status
Moisture Sensitivity Level (MSL) rating

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and functional alternatives (different electrical specifications that satisfy circuit requirements).

Parameter Comparison

Parameter	BSP129E6327	BSP129H6327XTSA1	STN1NK80Z
Manufacturer	Infineon Technologies	Infineon Technologies	STMicroelectronics
FET Type	N-Channel	N-Channel	N-Channel
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	240 V	240 V	800 V
Continuous Drain Current (Id) @ 25°C	350 mA (Ta)	350 mA (Ta)	250 mA (Tc)
Rds On (Max) @ Id, Vgs	6 Ohm @ 350 mA, 10 V	6 Ohm @ 350 mA, 10 V	16 Ohm @ 500 mA, 10 V
Gate Threshold Voltage (Vgs(th)) @ Id	1 V @ 108 µA	1 V @ 108 µA	4.5 V @ 50 µA
Gate Charge (Qg) (Max) @ Vgs	5.7 nC @ 5 V	5.7 nC @ 5 V	7.7 nC @ 10 V
Vgs (Max)	±20 V	±20 V	±30 V
Input Capacitance (Ciss) (Max) @ Vds	108 pF @ 25 V	108 pF @ 25 V	160 pF @ 25 V
Power Dissipation (Max)	1.8 W (Ta)	1.8 W (Ta)	2.5 W (Tc)
Operating Temperature Range	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Package Type	PG-SOT223-4	PG-SOT223-4	SOT-223
Mounting Type	Surface Mount	Surface Mount	Surface Mount
FET Feature	Depletion Mode	Depletion Mode	—
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

BSP129H6327XTSA1 (Parametric Equivalent)

The BSP129H6327XTSA1 is a direct parametric equivalent to the BSP129E6327. Both devices share identical electrical specifications across all critical parameters: 240 V Vdss, 350 mA continuous drain current, 6 Ohm Rds On, and 1.8 W power dissipation. The BSP129H6327XTSA1 is currently in active production status, ensuring long-term availability. This substitute offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant original part. The identical package configuration (PG-SOT223-4) and depletion mode feature enable direct board-level substitution without circuit modification. This part is the preferred selection for applications requiring exact electrical and mechanical compatibility.

STN1NK80Z (Functional Alternative)

The STN1NK80Z is a functional alternative manufactured by STMicroelectronics. This device differs in several electrical parameters: Vdss is rated at 800 V (versus 240 V), continuous drain current is 250 mA (versus 350 mA), and Rds On is 16 Ohm (versus 6 Ohm). The gate threshold voltage is 4.5 V compared to 1 V, and input capacitance is 160 pF versus 108 pF. The STN1NK80Z is suitable only for applications where the higher voltage rating and increased power dissipation (2.5 W) are acceptable, and where the lower current rating and higher on-resistance do not compromise circuit performance. The SOT-223 package is mechanically compatible with the original PG-SOT223-4 footprint. This substitute is active in production and ROHS3 compliant. Selection of this alternative requires circuit-level analysis to confirm functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the BSP129H6327XTSA1 be used as a direct replacement for the BSP129E6327?

A: Yes. The BSP129H6327XTSA1 is a parametric equivalent with identical electrical specifications and package configuration. Direct substitution is possible without circuit modification.

Q: What are the key differences between the BSP129E6327 and STN1NK80Z?

A: The STN1NK80Z has a higher Vdss rating (800 V versus 240 V), lower continuous drain current (250 mA versus 350 mA), higher Rds On (16 Ohm versus 6 Ohm), and higher gate threshold voltage (4.5 V versus 1 V). These differences require circuit-level evaluation before substitution.

Q: Are both substitute parts available in the same package?

A: Both substitutes use compatible surface mount packages. The BSP129H6327XTSA1 uses PG-SOT223-4, identical to the original. The STN1NK80Z uses SOT-223, which is mechanically compatible with the original footprint.

Q: What is the compliance status difference between the original and substitute parts?

A: The BSP129E6327 is RoHS non-compliant. Both substitutes (BSP129H6327XTSA1 and STN1NK80Z) are ROHS3 compliant. All three parts are REACH unaffected.

Q: Which substitute should be selected for a new design?

A: For new designs, the BSP129H6327XTSA1 is the recommended selection due to identical electrical specifications, active production status, and ROHS3 compliance. The STN1NK80Z should be selected only when the higher voltage rating and increased power dissipation are circuit requirements.

Q: Is the depletion mode feature present in all substitute parts?

A: The BSP129H6327XTSA1 retains the depletion mode feature of the original part. The STN1NK80Z does not specify a depletion mode feature in the provided data.

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

A: All three parts (BSP129E6327, BSP129H6327XTSA1, and STN1NK80Z) have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

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