STT3PF30L P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The STT3PF30L is a P-Channel MOSFET manufactured by STMicroelectronics, rated for 30V drain-to-source voltage with 2.4A continuous drain current in a SOT-23-6 surface mount package. This device is part of the STripFET™ II series and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	2.4	A
Rds On (Max) @ Id, Vgs	165 mOhm @ 1.5A, 10V	—
Gate Threshold Voltage Vgs(th) (Max)	2.5	V @ 250µA
Power Dissipation (Max)	1.6	W
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-6	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STT3PF30L is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

FET Type: P-Channel (required match)
Drain to Source Voltage (Vdss): 30V minimum (equal or higher acceptable)
Continuous Drain Current (Id): 2.4A minimum at 25°C (equal or higher acceptable)
Gate Threshold Voltage: Compatible with 4.5V and 10V drive voltages
Operating Temperature Range: -55°C to 150°C (minimum requirement)
RoHS3 Compliance: Required for regulatory alignment
Moisture Sensitivity Level: MSL 1 (Unlimited)

Secondary Compatibility Factors:

Package Type: SOT-23-6 or equivalent thin TSOT-23-6 variants acceptable
Rds On characteristics: Lower values indicate improved performance
Power Dissipation: Higher ratings provide design margin

All four substitute parts meet or exceed the primary electrical criteria. Variations in package designation (TSMT6, 6-TSOP, SOT-26) represent equivalent form factors suitable for the same PCB footprints or compatible layouts.

Parameter Comparison

Parameter	STT3PF30L (Main)	NTGS3455T1G	RRQ030P03TR	ZXM62P03E6TA	ZXMP3A17E6TA
Manufacturer	STMicroelectronics	onsemi	Rohm Semiconductor	Diodes Incorporated	Diodes Incorporated
FET Type	P-Channel	P-Channel	P-Channel	P-Channel	P-Channel
Vdss (V)	30	30	30	30	30
Id @ 25°C (A)	2.4	2.5	3.0	1.5	3.2
Rds On (Max) @ 10V (mOhm)	165 @ 1.5A	100 @ 3.5A	75 @ 3.0A	150 @ 1.6A	70 @ 3.2A
Vgs(th) (Max) (V)	2.5 @ 250µA	3.0 @ 250µA	2.5 @ 1mA	1.0 @ 250µA	1.0 @ 250µA
Gate Charge Qg (Max) (nC)	7 @ 4.5V	13 @ 10V	12 @ 10V	10.2 @ 10V	15.8 @ 10V
Power Dissipation (Max) (W)	1.6	0.5	0.6	0.625	1.1
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	SOT-23-6	6-TSOP / TSOT-23-6	TSMT6 (SC-95) / TSOT-23-6	SOT-26	SOT-23-6
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

NTGS3455T1G (onsemi) This substitute provides equivalent electrical performance with 2.5A continuous drain current, matching the STT3PF30L current rating. The device is in active production status, ensuring long-term availability. RoHS3 compliance and MSL 1 rating align with the original part specifications. The 6-TSOP package is mechanically compatible with SOT-23-6 footprints. This part is suitable for direct replacement in applications where power dissipation is not a limiting factor.

RRQ030P03TR (Rohm Semiconductor) This substitute exceeds the original specifications with 3.0A continuous drain current and superior Rds On characteristics (75 mOhm at 3.0A, 10V). Active production status guarantees component availability. RoHS3 compliance and MSL 1 rating match the original device. The TSMT6 package is mechanically equivalent to SOT-23-6. This part is recommended for applications requiring improved thermal performance or higher current capacity.

ZXM62P03E6TA (Diodes Incorporated) This substitute provides 1.5A continuous drain current, which is below the original 2.4A specification. While electrically compatible with 30V Vdss and matching operating temperature range, this part is suitable only for applications where the reduced current rating is acceptable. Active production status and RoHS3 compliance are confirmed. The SOT-26 package requires PCB layout verification for compatibility.

ZXMP3A17E6TA (Diodes Incorporated) This substitute exceeds the original specifications with 3.2A continuous drain current and superior Rds On characteristics (70 mOhm at 3.2A, 10V). Active production status ensures availability. RoHS3 compliance and MSL 1 rating align with the original part. The SOT-23-6 package provides direct mechanical compatibility. This part is recommended for applications requiring enhanced performance and thermal margin.

Frequently Asked Questions (FAQ)

Q: Can I use NTGS3455T1G as a direct replacement for STT3PF30L? A: Yes. The NTGS3455T1G meets all primary electrical criteria: 30V Vdss, 2.5A continuous drain current (exceeds 2.4A requirement), compatible gate threshold voltage, and matching operating temperature range. The 6-TSOP package is mechanically compatible with SOT-23-6 footprints. Active production status provides long-term supply assurance.

Q: What is the difference between RRQ030P03TR and ZXMP3A17E6TA? A: Both parts exceed the original STT3PF30L specifications with higher current ratings (3.0A and 3.2A respectively) and lower Rds On values. RRQ030P03TR uses a TSMT6 package, while ZXMP3A17E6TA uses SOT-23-6. Both are electrically superior and suitable for applications requiring improved thermal performance. Package selection depends on PCB layout requirements.

Q: Why is ZXM62P03E6TA listed as a substitute if it has lower current rating? A: ZXM62P03E6TA is included because it meets the core electrical criteria (30V Vdss, P-Channel, compatible gate characteristics, and operating temperature range). However, its 1.5A continuous drain current is below the original 2.4A specification. This part is suitable only for applications where the reduced current capacity is acceptable or where the design margin permits lower current operation.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All four substitute parts (NTGS3455T1G, RRQ030P03TR, ZXM62P03E6TA, and ZXMP3A17E6TA) are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the original STT3PF30L specifications.

Q: What is the impact of different package types on PCB design? A: The substitute parts use three package variants: SOT-23-6 (ZXMP3A17E6TA), 6-TSOP (NTGS3455T1G), TSMT6 (RRQ030P03TR), and SOT-26 (ZXM62P03E6TA). SOT-23-6 and TSOT-23-6 variants are mechanically equivalent and use the same PCB footprint. TSMT6 and 6-TSOP packages are also compatible with standard SOT-23-6 layouts. SOT-26 requires verification of pin spacing and layout compatibility before implementation.

Q: Which substitute part offers the best thermal performance? A: ZXMP3A17E6TA provides the best thermal performance with 1.1W power dissipation rating and the lowest Rds On value (70 mOhm at 3.2A, 10V). RRQ030P03TR offers comparable thermal characteristics with 0.6W power dissipation and 75 mOhm Rds On. Both parts are suitable for applications with stringent thermal requirements.

Q: Can I use these substitutes in legacy designs without circuit modification? A: Yes, for applications where the original current rating (2.4A) is the design requirement. NTGS3455T1G provides equivalent current capacity. For applications using higher current substitutes (RRQ030P03TR or ZXMP3A17E6TA), circuit modifications are not required, but thermal design should be reviewed to ensure the improved performance does not introduce unintended circuit behavior changes. ZXM62P03E6TA requires design verification due to its lower current rating.

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