NTJS3157NT2 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The NTJS3157NT2 is an N-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 3.2A continuous drain current at 25°C. The device is housed in a 6-TSSOP/SC-88/SOT-363 surface mount package and dissipates up to 1W at ambient temperature. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity. Active alternatives with identical or compatible electrical and mechanical specifications are available from onsemi and other manufacturers.

Substiute Parts

NTJS3157NT2

onsemiIn Stock: 875NTJS3157NT2 Datasheet

Current PartRFQ

NTJS3157NT1G

onsemiIn Stock: 1647NTJS3157NT1G Datasheet

DirectRFQ

NTJS3157NT2G

onsemiIn Stock: 794NTJS3157NT2G Datasheet

Parametric EquivalentRFQ

AO7408

Alpha & Omega Semiconductor Inc.In Stock: 4262AO7408 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTJS3157NT2 is determined by strict equivalence across the following critical parameters:

Direct Electrical Equivalence Criteria:

• Drain-to-source voltage rating (Vdss): 20V
• Continuous drain current (Id) @ 25°C: 3.2A minimum
• On-state resistance (Rds On) @ specified gate voltage: 60mOhm or lower
• Gate threshold voltage (Vgs(th)): 1V @ 250µA
• Maximum gate voltage (Vgs): ±8V
• Operating temperature range: -55°C to 150°C

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package designation: 6-TSSOP/SC-88/SOT-363

Compliance Criteria:

• RoHS status: ROHS3 Compliant (preferred for active parts)
• Moisture sensitivity level: 1 (Unlimited)
• REACH status: REACH Unaffected

Substitute parts are classified into two categories: Direct Manufacturer Equivalents (identical electrical and mechanical specifications from the original manufacturer) and Parametric Equivalents (alternative manufacturers meeting all electrical and mechanical requirements).

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalents (onsemi):

NTJS3157NT1G and NTJS3157NT2G are direct electrical and mechanical equivalents of the NTJS3157NT2. Both parts maintain identical specifications across all critical parameters: 20V Vdss, 3.2A continuous drain current, 60mOhm Rds On, and 1W power dissipation. Both are classified as Active products with ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete NTJS3157NT2. NTJS3157NT1G offers higher inventory availability (1634 units) and is supplied in Cut Tape and Digi-Reel packaging formats. NTJS3157NT2G provides an alternative with 697 units in stock. Selection between these two onsemi equivalents depends on packaging requirements and procurement lead time considerations.

Parametric Equivalent (Alternative Manufacturer):

AO7408 from Alpha & Omega Semiconductor Inc. is a parametric equivalent suitable for applications where continuous drain current requirements do not exceed 2A. This part meets all voltage, gate threshold, and temperature specifications of the NTJS3157NT2. However, AO7408 exhibits reduced continuous drain current (2A versus 3.2A), lower power dissipation (350mW versus 1W), lower gate charge (4nC versus 15nC), and lower input capacitance (320pF versus 500pF). AO7408 is ROHS3 compliant and maintains the highest inventory availability (4171 units). This part is suitable for designs operating below 2A continuous drain current and where the reduced thermal and switching characteristics are acceptable.

For new designs or procurement of the obsolete NTJS3157NT2, onsemi equivalents NTJS3157NT1G or NTJS3157NT2G are the primary recommendations due to identical electrical specifications and active product status. AO7408 is suitable only for applications with reduced current requirements.

Frequently Asked Questions (FAQ)

Q: Can NTJS3157NT1G directly replace NTJS3157NT2 in existing designs?

A: Yes. NTJS3157NT1G is a direct electrical and mechanical equivalent with identical Vdss (20V), Id (3.2A), Rds On (60mOhm), and package specifications (6-TSSOP/SC-88/SOT-363). Both parts are N-Channel MOSFETs with identical gate threshold voltage, maximum gate voltage, and operating temperature range. The primary difference is product status: NTJS3157NT1G is Active with ROHS3 compliance, while NTJS3157NT2 is Obsolete and RoHS non-compliant.

Q: What is the difference between NTJS3157NT1G and NTJS3157NT2G?

A: Both parts are electrically and mechanically identical to NTJS3157NT2. The primary distinction is packaging format: NTJS3157NT1G is supplied in Cut Tape (CT) and Digi-Reel formats, while NTJS3157NT2G packaging format is not specified. Both are Active products with ROHS3 compliance. Selection depends on procurement and assembly requirements.

Q: Can AO7408 replace NTJS3157NT2 in all applications?

A: AO7408 is a parametric equivalent suitable only for applications where continuous drain current does not exceed 2A. The NTJS3157NT2 is rated for 3.2A continuous drain current, while AO7408 is rated for 2A. Additionally, AO7408 has lower power dissipation (350mW versus 1W), lower gate charge (4nC versus 15nC), and lower input capacitance (320pF versus 500pF). AO7408 is suitable for designs operating below 2A and where reduced switching and thermal characteristics are acceptable.

Q: Are all substitute parts compatible with the 6-TSSOP/SC-88/SOT-363 package?

A: Yes. NTJS3157NT1G, NTJS3157NT2G, and AO7408 are all housed in 6-TSSOP/SC-88/SOT-363 surface mount packages. Pin configuration and mechanical dimensions are compatible with the original NTJS3157NT2 package.

Q: What is the significance of RoHS compliance for substitute part selection?

A: NTJS3157NT2 is RoHS non-compliant, while NTJS3157NT1G, NTJS3157NT2G, and AO7408 are all ROHS3 compliant. For new designs and procurement, ROHS3-compliant parts are required to meet current regulatory requirements in most markets. For legacy system maintenance, RoHS non-compliant parts may be acceptable if regulatory exemptions apply.

Q: Which substitute part offers the best inventory availability?

A: AO7408 offers the highest inventory availability with 4171 units in stock. NTJS3157NT1G provides 1634 units, and NTJS3157NT2G provides 697 units. However, inventory availability should be secondary to electrical specification matching for the application.

Q: Are there any thermal or switching performance differences between the substitute parts?

A: Yes. NTJS3157NT1G and NTJS3157NT2G maintain identical thermal and switching characteristics to NTJS3157NT2 (1W power dissipation, 15nC gate charge, 500pF input capacitance). AO7408 exhibits reduced power dissipation (350mW), lower gate charge (4nC), and lower input capacitance (320pF), resulting in faster switching and lower thermal generation. These differences are acceptable only for applications operating below 2A continuous drain current.