STS10P4LLF6 Equivalent & Substitute Parts

Part Overview

The STS10P4LLF6 is an active P-Channel MOSFET manufactured by STMicroelectronics, part of the STripFET™ F6 series. This surface mount device is rated for 40V drain-to-source voltage with 10A continuous drain current at 25°C and is housed in an 8-SOIC package. The device is designed for applications requiring P-channel switching and power management in compact form factors.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the critical operating parameters. The STS10P4LLF6 remains in active production; however, alternative sources may be evaluated based on availability, lead time, or supply chain requirements.

Substiute Parts

STS10P4LLF6

STMicroelectronicsIn Stock: 15417STS10P4LLF6 Datasheet

Current PartRFQ

AO4485

UMWIn Stock: 90167AO4485 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STS10P4LLF6 are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• FET Type: P-Channel
• Drain to Source Voltage (Vdss): 40V
• Current - Continuous Drain (Id) @ 25°C: 10A (Ta)
• Drive Voltage (Max Rds On, Min Rds On): 4.5V, 10V
• Rds On (Max) @ Id, Vgs: 15 mOhm @ specified conditions
• Vgs (Max): ±20V
• Gate Charge (Qg) (Max) @ Vgs: within acceptable range
• Input Capacitance (Ciss) (Max) @ Vds: within acceptable range

Mechanical Equivalence Criteria:

• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

The AO4485 manufactured by UMW meets these substitution criteria and is classified as an equivalent substitute for the STS10P4LLF6.

Parameter Comparison

Engineering Selection Recommendations

Both the STS10P4LLF6 and AO4485 are active products with ROHS3 compliance and MSL 1 ratings, making them suitable for production applications. The devices share identical electrical ratings for Vdss, Id, and gate voltage limits, with compatible 8-SOIC packaging.

The AO4485 demonstrates lower power dissipation (1.7W versus 2.7W) and an extended operating temperature range (-55°C to 150°C versus 150°C maximum). These characteristics may provide thermal and environmental advantages in specific applications.

Selection between these devices should be based on supply chain availability, lead time requirements, and cost considerations. Both devices meet the same compliance standards and mechanical interface requirements for direct substitution in 8-SOIC surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the AO4485 be used as a direct replacement for the STS10P4LLF6?

A: Yes. Both devices are P-Channel MOSFETs with identical Vdss (40V) and Id (10A) ratings, matching drive voltages, and compatible 8-SOIC packaging. Both are ROHS3 compliant with MSL 1 ratings.

Q: What are the differences in gate charge between these devices?

A: The STS10P4LLF6 has a maximum gate charge of 34 nC at 4.5V, while the AO4485 has 55 nC at 10V. Gate charge differences affect switching speed and driver requirements; applications with tight switching frequency constraints should evaluate this parameter against specific circuit requirements.

Q: Are there package compatibility concerns?

A: No. Both devices use the 8-SOIC package with identical dimensions (0.154", 3.90mm width), ensuring mechanical and electrical compatibility on PCB layouts designed for either part.

Q: What is the significance of the extended temperature range in the AO4485?

A: The AO4485 operates from -55°C to 150°C, compared to the STS10P4LLF6 maximum of 150°C. The extended lower temperature limit provides operational capability in cold environment applications.

Q: How do the Rds On specifications compare?

A: Both devices specify 15 mOhm maximum Rds On at 10V gate voltage. The STS10P4LLF6 specifies this at 3A drain current, while the AO4485 specifies it at 10A. This indicates the AO4485 maintains the same on-resistance across the full rated current range.

Q: Are both devices suitable for high-frequency switching applications?

A: Gate charge and input capacitance affect switching performance. The STS10P4LLF6 has lower gate charge (34 nC) and higher input capacitance (3525 pF), while the AO4485 has higher gate charge (55 nC) and lower input capacitance (3000 pF). Application-specific switching frequency requirements should guide device selection.

Q: What compliance certifications apply to both devices?

A: Both the STS10P4LLF6 and AO4485 are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity). Both carry EAR99 ECCN classification.