STT3PF20V Equivalent & Substitute Parts

Part Overview

The STT3PF20V is a P-Channel MOSFET manufactured by STMicroelectronics, designed for surface mount applications in the SOT-23-6 package. This device operates at 20V drain-to-source voltage with a continuous drain current rating of 2.2A at 25°C. The STT3PF20V belongs to the STripFET™ II series and is classified as obsolete product status. Due to its obsolete classification, identifying equivalent substitute parts with matching electrical and mechanical specifications is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	2.2	A
Rds On (Max) @ 1A, 4.5V	200	mOhm
Gate-Source Voltage (Vgs Max)	±12	V
Operating Temperature Range	-55 to 150	°C
Package Type	SOT-23-6	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the STT3PF20V are identified based on strict electrical and mechanical parameter matching within the P-Channel MOSFET category. The substitution criteria are:

Primary Matching Parameters:

FET Type: P-Channel
Drain to Source Voltage (Vdss): 20V
Package: SOT-23-6 surface mount
Mounting Type: Surface Mount
Gate-Source Voltage (Vgs Max): ±12V
Operating Temperature Range: -55°C to 150°C

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Minimum 2.2A at 25°C
Rds On (Max): 200 mOhm or lower at specified conditions
RoHS Compliance: ROHS3 Compliant

The ZXM62P02E6TA manufactured by Diodes Incorporated meets all primary and secondary matching criteria, making it a direct electrical and mechanical equivalent for the obsolete STT3PF20V.

Parameter Comparison

Parameter	STT3PF20V (STMicroelectronics)	ZXM62P02E6TA (Diodes Incorporated)	Match Status
FET Type	P-Channel	P-Channel	Match
Drain to Source Voltage (Vdss)	20 V	20 V	Match
Continuous Drain Current (Id) @ 25°C	2.2 A	2.3 A	Compatible
Rds On (Max) @ 4.5V	200 mOhm @ 1A	200 mOhm @ 1.6A	Match
Gate-Source Voltage (Vgs Max)	±12 V	±12 V	Match
Operating Temperature Range	-55 to 150 °C	-55 to 150 °C	Match
Package Type	SOT-23-6	SOT-23-6	Match
Mounting Type	Surface Mount	Surface Mount	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The ZXM62P02E6TA is a direct substitute for the obsolete STT3PF20V based on electrical and mechanical equivalence. The substitute part offers the following advantages:

Product Status: The ZXM62P02E6TA maintains active product status with Diodes Incorporated, ensuring long-term availability and supply chain continuity compared to the obsolete STT3PF20V.

Compliance Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for electronic component applications.

Electrical Performance: The ZXM62P02E6TA delivers equivalent or superior electrical characteristics, including a continuous drain current of 2.3A (compared to 2.2A) and identical maximum Rds On specification of 200 mOhm at 4.5V gate-source voltage.

Package Compatibility: Both devices utilize the SOT-23-6 surface mount package, enabling direct PCB layout compatibility without design modification.

Thermal Performance: Operating temperature ranges are identical (-55°C to 150°C), and both devices support the same gate-source voltage range (±12V), ensuring functional equivalence in thermal and electrical stress conditions.

Frequently Asked Questions (FAQ)

Q: Can the ZXM62P02E6TA be used as a direct replacement for the STT3PF20V without PCB modifications?

A: Yes. Both devices share identical SOT-23-6 package geometry and pin configuration, enabling direct PCB substitution without layout changes.

Q: Are there differences in gate charge characteristics between these parts?

A: The ZXM62P02E6TA has a maximum gate charge of 5.8 nC at 4.5V, compared to 4.7 nC for the STT3PF20V. This difference affects switching speed and gate drive requirements. Circuit designs must accommodate the higher gate charge specification.

Q: What is the significance of the continuous drain current difference (2.2A vs. 2.3A)?

A: The ZXM62P02E6TA provides 0.1A additional continuous drain current capacity, making it suitable for applications requiring the STT3PF20V specification and those with slightly higher current demands within the 20V rating.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the STT3PF20V and ZXM62P02E6TA are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements for electronic component applications.

Q: What packaging options are available for the substitute part?

A: The ZXM62P02E6TA is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.

Q: Are there input capacitance differences that affect circuit design?

A: Input capacitance (Ciss) is 315 pF for the STT3PF20V and 320 pF for the ZXM62P02E6TA at 15V Vds. This 5 pF difference is negligible for most applications and does not require circuit redesign.

Q: How do the power dissipation ratings compare?

A: The STT3PF20V is rated at 1.6W (Tc), while the ZXM62P02E6TA is rated at 1.1W (Ta). The difference in measurement conditions (Tc vs. Ta) reflects different thermal reference points. Both devices support equivalent thermal management in typical applications.

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