NTLJS4149PTAG Equivalent & Substitute Parts

Part Overview

The NTLJS4149PTAG is a P-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage with 2.7A continuous drain current at 25°C. The device is housed in a 6-WDFN (2x2) surface mount package with an exposed pad and is designed for low on-resistance switching applications with a maximum power dissipation of 700mW at ambient temperature.

This part is classified as obsolete. Identifying equivalent and substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this MOSFET.

Substiute Parts

NTLJS4149PTAG

onsemiIn Stock: 900NTLJS4149PTAG Datasheet

Current PartRFQ

PMPB47XP,115

Nexperia USA Inc.In Stock: 1081PMPB47XP,115 Datasheet

SimilarRFQ

STL4P3LLH6

STMicroelectronicsIn Stock: 4241STL4P3LLH6 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTLJS4149PTAG is determined by the following critical parameters:

Electrical Compatibility Requirements:

• FET Type: P-Channel topology
• Drain to Source Voltage (Vdss): Minimum 30V rating
• Continuous Drain Current (Id): Minimum 2.7A at 25°C
• On-Resistance (Rds On): Comparable or lower values to maintain switching efficiency
• Gate Threshold Voltage (Vgs(th)): Compatible gate drive requirements
• Operating Temperature Range: Support -55°C to 150°C (TJ)
• Maximum Gate Voltage (Vgs): ±12V or greater

Mechanical Compatibility Requirements:

• Mounting Type: Surface Mount
• Package Type: 6-pin configurations with exposed pad (WDFN, DFN, or equivalent)
• Footprint: Compatible with 2x2mm or similar surface mount land patterns

The substitute parts listed below meet or exceed these electrical and mechanical parameters, enabling direct or near-direct replacement in applications designed for the NTLJS4149PTAG.

Parameter Comparison

Engineering Selection Recommendations

PMPB47XP,115 (Nexperia USA Inc.): This substitute offers higher continuous drain current (4A versus 2.7A) and improved power dissipation capability (1.7W at Ta versus 0.7W). The on-resistance is marginally lower (58 mOhm at 4A, 4.5V), and the gate threshold voltage is lower (0.9V), enabling easier gate drive. The part is classified as Active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance and REACH unaffected status align with modern regulatory requirements. The DFN2020MD-6 package is a 6-pin UDFN variant with exposed pad, requiring PCB layout verification for footprint compatibility.

STL4P3LLH6 (STMicroelectronics): This substitute provides the highest continuous drain current (4A) and superior power dissipation (2.4W at Ta). The on-resistance is lowest (56 mOhm at 2A, 10V), and gate charge is significantly reduced (6 nC at 4.5V), resulting in faster switching performance. The part is classified as Active product status with RoHS3 compliance. The maximum gate voltage rating is higher (±20V versus ±12V), providing greater gate drive flexibility. The PowerFlat™ (2x2) package maintains the same 2x2mm footprint as the original NTLJS4149PTAG, simplifying PCB layout migration. Inventory availability is highest among substitutes (4200 Pcs).

Both substitutes meet or exceed the electrical and mechanical requirements of the NTLJS4149PTAG. Selection between them depends on specific application requirements regarding power dissipation, switching speed, and package footprint constraints.

Frequently Asked Questions (FAQ)

Q: Can PMPB47XP,115 be used as a direct replacement for NTLJS4149PTAG?

A: PMPB47XP,115 meets all critical electrical parameters (30V Vdss, 4A Id, compatible Vgs range). However, the package is DFN2020MD-6 (6-UDFN), which differs from the original 6-WDFN. PCB footprint verification is required before implementation. The part is electrically compatible but may require layout modifications.

Q: Can STL4P3LLH6 be used as a direct replacement for NTLJS4149PTAG?

A: STL4P3LLH6 meets all electrical parameters and uses a PowerFlat™ (2x2) package with the same 2x2mm footprint as the original NTLJS4149PTAG. This substitute offers the highest compatibility for direct PCB replacement without layout changes. Electrical performance exceeds the original specification.

Q: What are the key differences in on-resistance between these parts?

A: NTLJS4149PTAG specifies 62 mOhm at 2A, 4.5V. PMPB47XP,115 specifies 58 mOhm at 4A, 4.5V. STL4P3LLH6 specifies 56 mOhm at 2A, 10V. All three parts exhibit comparable on-resistance performance at their respective rated conditions, with STL4P3LLH6 showing the lowest value.

Q: Are there package compatibility concerns?

A: The original NTLJS4149PTAG uses 6-WDFN (2x2). PMPB47XP,115 uses DFN2020MD-6 (6-UDFN), which has a different footprint and requires PCB layout verification. STL4P3LLH6 uses PowerFlat™ (2x2), which maintains the same 2x2mm footprint and is compatible with the original PCB layout.

Q: What is the significance of gate charge differences?

A: NTLJS4149PTAG has 15 nC gate charge at 4.5V. PMPB47XP,115 has 21 nC, requiring slightly higher gate drive energy. STL4P3LLH6 has 6 nC, enabling faster switching with lower gate drive requirements. Lower gate charge reduces switching losses in high-frequency applications.

Q: Are all substitutes RoHS and REACH compliant?

A: All three parts are REACH unaffected. PMPB47XP,115 and STL4P3LLH6 are RoHS3 compliant. The original NTLJS4149PTAG does not specify RoHS status. Both substitutes meet modern environmental and regulatory standards.

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

A: All three parts are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special moisture control requirements.