SSM3K15FS,LF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The SSM3K15FS,LF is an N-Channel MOSFET manufactured by Toshiba Semiconductor and Storage, designed for surface mount applications with a 30V drain-to-source voltage rating and 100mA continuous drain current capability. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates within the π-MOSVI series and is housed in an SC-75 (SOT-416) surface mount package.

Substiute Parts

SSM3K15FS,LF

Toshiba Semiconductor and StorageIn Stock: 9076SSM3K15FS,LF Datasheet

Current PartRFQ

SSM3K15AFS,LF

Toshiba Semiconductor and StorageIn Stock: 21227SSM3K15AFS,LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SSM3K15FS,LF is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• FET Type: N-Channel (identical topology required)
• Drain to Source Voltage (Vdss): 30V (minimum rating must equal or exceed)
• Continuous Drain Current (Id): 100mA (minimum rating must equal or exceed)
• Vgs(th) (Max): 1.5V @ 100µA (threshold voltage compatibility)
• Vgs (Max): ±20V (gate voltage rating)
• Operating Temperature: 150°C (TJ) (thermal rating)

Mechanical Equivalence Criteria:

• Package / Case: SC-75, SOT-416 (identical surface mount footprint)
• Mounting Type: Surface Mount (identical assembly method)
• Supplier Device Package: SSM (identical package designation)

The SSM3K15AFS,LF meets all substitution criteria and is classified as an active product with enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SSM3K15AFS,LF is the direct substitute for the obsolete SSM3K15FS,LF. Both devices share identical electrical specifications for Vdss, Id, Vgs(th), and operating temperature, ensuring functional compatibility in existing circuit designs. The substitute part is manufactured by the same supplier (Toshiba Semiconductor and Storage) and utilizes the identical SC-75 (SOT-416) surface mount package, eliminating the need for PCB layout modifications.

The SSM3K15AFS,LF offers improved performance characteristics: the on-resistance (Rds On) is reduced from 4Ohm to 3.6Ohm at the specified test conditions, and power dissipation is reduced from 200mW to 100mW. These improvements result in lower heat generation and improved efficiency in switching applications.

The substitute part carries Active product status, ensuring long-term availability and supply chain continuity. The SSM3K15AFS,LF is RoHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements. The main part (SSM3K15FS,LF) carries no such certifications, making the substitute the preferred choice for new designs and production transitions.

Frequently Asked Questions (FAQ)

Q: Can the SSM3K15AFS,LF be used as a direct replacement for the SSM3K15FS,LF in existing designs?

A: Yes. Both devices are N-Channel MOSFETs with identical Vdss (30V), Id (100mA), Vgs(th) (1.5V), and operating temperature (150°C) ratings. They share the same SC-75 (SOT-416) surface mount package and SSM device package designation. No circuit modifications or PCB layout changes are required.

Q: What are the key differences between these two parts?

A: The primary differences are product status and performance characteristics. The SSM3K15AFS,LF is an active product with improved on-resistance (3.6Ohm versus 4Ohm) and reduced power dissipation (100mW versus 200mW). The substitute part also includes RoHS3 compliance and REACH status documentation.

Q: Are there any thermal or electrical limitations when substituting the SSM3K15AFS,LF?

A: No thermal or electrical limitations exist. The substitute part maintains the same maximum operating temperature (150°C TJ) and gate voltage ratings (±20V Vgs Max). The improved on-resistance and reduced power dissipation of the substitute part provide enhanced thermal performance.

Q: Is the packaging identical between these parts?

A: Yes. Both parts use the SC-75 (SOT-416) surface mount package with SSM device package designation. Pin configuration, footprint, and mounting method are identical, ensuring direct PCB compatibility.

Q: What is the inventory status of the substitute part?

A: The SSM3K15AFS,LF has 21,200 pieces in stock as new original inventory. The obsolete SSM3K15FS,LF has 8,976 pieces in stock. The active status and higher inventory of the substitute part ensure reliable procurement for production requirements.

Q: Are there compliance or regulatory differences between these parts?

A: Yes. The SSM3K15AFS,LF is RoHS3 Compliant and REACH Unaffected. The SSM3K15FS,LF carries no such certifications. For applications requiring environmental compliance documentation, the substitute part is the appropriate selection.