ATP103-TL-H Equivalent & Substitute Parts

Part Overview

The ATP103-TL-H is a P-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage with 55A continuous drain current in Surface Mount ATPAK packaging. This device is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain electrical compatibility within the specified parameter ranges while accommodating potential packaging and thermal performance differences.

Key Parameters

Parameter	Value	Unit
FET Type	P-Channel	—
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	55	A
Rds On (Max) @ Id, Vgs	13 mOhm @ 28A, 10V	—
Gate Charge (Qg) (Max) @ Vgs	47 nC @ 10V	—
Vgs (Max)	±20	V
Input Capacitance (Ciss) (Max) @ Vds	2430 pF @ 10V	—
Power Dissipation (Max)	50	W
Operating Temperature (TJ)	150	°C
Mounting Type	Surface Mount	—
Package / Case	ATPAK (2 Leads+Tab)	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ATP103-TL-H are selected based on the following critical electrical and mechanical parameters:

Primary Compatibility Criteria:

FET Type: P-Channel topology
Drain to Source Voltage (Vdss): Minimum 30V rating required
Continuous Drain Current (Id): Minimum 52A to maintain current-handling capability
Gate-Source Voltage (Vgs): ±20V maximum rating
RoHS3 Compliance and REACH Unaffected status

Substitution Logic: The ATP103-TL-H operates at 30V with 55A continuous drain current. Substitute parts must support these electrical specifications. The STD52P3LLH6 provides equivalent 30V rating with 52A current capacity, representing a near-direct electrical substitute with different packaging (DPAK). The STL60P4LLF6 offers enhanced specifications with 40V rating and 60A capacity, providing margin for applications requiring higher voltage or current headroom, though this represents an upgrade rather than a direct equivalent.

All substitute parts maintain P-Channel MOSFET technology, Surface Mount mounting, and compliance certifications matching the original device.

Parameter Comparison

Parameter	ATP103-TL-H (onsemi)	STD52P3LLH6 (STMicroelectronics)	STL60P4LLF6 (STMicroelectronics)
FET Type	P-Channel	P-Channel	P-Channel
Drain to Source Voltage (Vdss)	30 V	30 V	40 V
Continuous Drain Current (Id) @ 25°C	55 A (Ta)	52 A (Tc)	60 A (Tc)
Rds On (Max) @ Id, Vgs	13 mOhm @ 28A, 10V	12 mOhm @ 26A, 10V	14 mOhm @ 6.5A, 10V
Gate Charge (Qg) (Max) @ Vgs	47 nC @ 10V	33 nC @ 4.5V	34 nC @ 4.5V
Vgs (Max)	±20 V	±20 V	±20 V
Input Capacitance (Ciss) (Max) @ Vds	2430 pF @ 10V	3350 pF @ 25V	3525 pF @ 25V
Power Dissipation (Max)	50 W (Tc)	70 W (Tc)	100 W (Tc)
Operating Temperature (TJ)	150 °C	175 °C	175 °C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	ATPAK (2 Leads+Tab)	TO-252-3, DPAK (2 Leads + Tab), SC-63	8-PowerVDFN
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

STD52P3LLH6 Selection: The STD52P3LLH6 is recommended as the primary direct electrical equivalent for ATP103-TL-H replacement. Both devices share identical 30V Vdss rating and comparable continuous drain current specifications (52A vs. 55A). The STD52P3LLH6 maintains active product status with full STMicroelectronics support, ROHS3 compliance, and REACH unaffected certification. The DPAK package provides superior thermal performance (70W vs. 50W) and higher maximum junction temperature (175°C vs. 150°C), offering improved reliability margins. PCB layout modifications are required due to package geometry differences between ATPAK and DPAK.

STL60P4LLF6 Selection: The STL60P4LLF6 serves as an enhanced substitute for applications requiring additional performance headroom. The 40V Vdss rating provides 33% voltage margin above the original 30V specification, and 60A continuous current capability exceeds the ATP103-TL-H by 9%. This device delivers superior thermal performance (100W dissipation, 175°C junction temperature) and lower gate charge (34 nC vs. 47 nC), reducing switching losses. The PowerFlat™ package enables improved thermal management through enhanced PCB contact area. This part is suitable for designs where voltage and current margins are beneficial, though it represents a specification upgrade rather than a direct replacement.

Both substitute parts maintain compliance certifications and Surface Mount mounting technology required for production continuity.

Frequently Asked Questions (FAQ)

Q: Can the STD52P3LLH6 directly replace the ATP103-TL-H without circuit modifications?

A: The STD52P3LLH6 provides electrical compatibility with the ATP103-TL-H across all critical parameters (30V Vdss, 52A continuous current, ±20V Vgs maximum). However, package geometry differs between ATPAK and DPAK, requiring PCB footprint redesign. Gate charge characteristics differ (33 nC vs. 47 nC), which may affect gate drive circuit timing in high-frequency switching applications. Thermal performance improves with the STD52P3LLH6 (70W vs. 50W), allowing higher power dissipation capability.

Q: What are the key differences between the STD52P3LLH6 and STL60P4LLF6?

A: The STD52P3LLH6 matches the ATP103-TL-H electrical specifications (30V, 52A), while the STL60P4LLF6 provides enhanced ratings (40V, 60A). The STL60P4LLF6 offers 33% higher voltage rating and 15% higher current capacity, with significantly improved thermal performance (100W vs. 70W). Gate charge is comparable between both substitutes (33-34 nC), but the STL60P4LLF6 uses PowerFlat™ packaging versus DPAK, affecting PCB layout and thermal management strategies.

Q: Are packaging differences between ATPAK, DPAK, and PowerFlat™ significant for substitution?

A: Yes. ATPAK, DPAK (TO-252-3), and PowerFlat™ (8-PowerVDFN) represent distinct package geometries with different thermal characteristics, lead configurations, and PCB footprints. DPAK provides moderate thermal improvement over ATPAK. PowerFlat™ delivers superior thermal performance through increased PCB contact area. Substitution requires complete PCB layout redesign and thermal analysis validation for each package type.

Q: Do all substitute parts meet the same compliance requirements as the ATP103-TL-H?

A: Yes. Both STD52P3LLH6 and STL60P4LLF6 are ROHS3 compliant and REACH unaffected, matching the ATP103-TL-H compliance status. Both maintain Moisture Sensitivity Level 1 (Unlimited), eliminating moisture-related handling constraints. All three devices carry EAR99 ECCN classification and identical HTSUS codes.

Q: Which substitute is appropriate for a direct replacement in existing designs?

A: The STD52P3LLH6 is the appropriate choice for direct electrical replacement due to matching 30V/52A specifications. The STL60P4LLF6 is suitable for new designs or redesigns where enhanced voltage and current margins provide system benefits. Both require PCB layout modifications due to package differences from the original ATPAK.

Q: How do gate charge differences affect circuit performance?

A: The ATP103-TL-H specifies 47 nC gate charge at 10V, while both substitutes specify 33-34 nC at 4.5V. Lower gate charge reduces switching losses and allows faster switching transitions with equivalent gate drive circuitry. This represents a performance improvement for both substitutes, reducing power dissipation in switching applications and enabling higher switching frequencies without additional gate drive current.

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