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SSM3K17SU,LF(D Equivalent & Substitute Parts
Part Overview
The SSM3K17SU,LF(D is an N-channel MOSFET manufactured by Toshiba Semiconductor and Storage, rated for 50V drain-to-source voltage with 100mA continuous drain current at 25°C. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The substitute part maintains identical electrical specifications and functional performance while offering improved availability through active product status.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| FET Type | N-Channel |
| Drain to Source Voltage (Vdss) | 50 V |
| Current - Continuous Drain (Id) @ 25°C | 100mA (Ta) |
| Power Dissipation (Max) | 150mW (Ta) |
| Rds On (Max) @ Id, Vgs | 20Ohm @ 10mA, 4V |
| Vgs(th) (Max) @ Id | 1.5V @ 1µA |
| Vgs (Max) | ±7V |
| Input Capacitance (Ciss) (Max) @ Vds | 7 pF @ 3 V |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Operating Temperature (TJ) | 150°C |
| Mounting Type | Surface Mount |
| Package / Case | SC-70, SOT-323 |
Substitute Part Grouping Explanation
Substitution of the SSM3K17SU,LF(D with the SSM3K17FU,LF is based on electrical and mechanical parameter equivalence. Both parts share the same base product number (SSM3K17) and maintain identical specifications across all critical parameters: 50V Vdss rating, 100mA continuous drain current, 150mW power dissipation, 20Ohm maximum Rds On, and SC-70/SOT-323 package configuration. The substitute part is manufactured by the same supplier (Toshiba Semiconductor and Storage) and carries active product status with full compliance certifications (ROHS3, REACH Unaffected). The primary distinction is packaging format: the substitute is supplied in Tape & Reel (TR) configuration versus the original part's unspecified packaging, and product lifecycle status transition from obsolete to active.
Parameter Comparison
| Parameter | SSM3K17SU,LF(D (Original) | SSM3K17FU,LF (Substitute) |
|---|---|---|
| Manufacturer | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Category | Transistors, FETs, MOSFETs | Transistors, FETs, MOSFETs |
| FET Type | N-Channel | N-Channel |
| Drain to Source Voltage (Vdss) | 50 V | 50 V |
| Current - Continuous Drain (Id) @ 25°C | 100mA (Ta) | 100mA (Ta) |
| Power Dissipation (Max) | 150mW (Ta) | 150mW (Ta) |
| Rds On (Max) @ Id, Vgs | 20Ohm @ 10mA, 4V | 20Ohm @ 10mA, 4V |
| Vgs(th) (Max) @ Id | 1.5V @ 1µA | 1.5V @ 1µA |
| Vgs (Max) | ±7V | ±7V |
| Input Capacitance (Ciss) (Max) @ Vds | 7 pF @ 3 V | 7 pF @ 3 V |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| Operating Temperature (TJ) | 150°C | 150°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SC-70, SOT-323 | SC-70, SOT-323 |
| Product Status | Obsolete | Active |
| RoHS Status | Not specified | ROHS3 Compliant |
| REACH Status | Not specified | REACH Unaffected |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8541.21.0095 | 8541.21.0095 |
Engineering Selection Recommendations
The SSM3K17FU,LF is a direct functional equivalent to the SSM3K17SU,LF(D and is suitable for replacement in all applications where the original part was specified. Selection of the substitute part is supported by: identical electrical performance across all rated parameters, same physical package (SC-70/SOT-323), active product status ensuring long-term availability, and full compliance with ROHS3 and REACH regulations. The substitute part carries EAR99 export classification matching the original component. Surface mount configuration and MSL 1 rating remain unchanged, eliminating any modifications to assembly or storage procedures.
Frequently Asked Questions (FAQ)
Q: Are the SSM3K17SU,LF(D and SSM3K17FU,LF electrically identical?
A: Yes. Both parts maintain identical specifications for Vdss (50V), continuous drain current (100mA), power dissipation (150mW), Rds On (20Ohm @ 10mA, 4V), gate threshold voltage (1.5V @ 1µA), and input capacitance (7pF @ 3V). Operating temperature range and gate voltage limits are also identical.
Q: What is the primary difference between these parts?
A: The SSM3K17FU,LF is supplied in Tape & Reel (TR) packaging format and carries active product status, whereas the SSM3K17SU,LF(D is obsolete. Both use the same SC-70/SOT-323 package for the individual component.
Q: Can the SSM3K17FU,LF be used as a direct drop-in replacement?
A: Yes. The substitute part is pin-compatible, electrically equivalent, and uses the same physical package. No circuit modifications or PCB layout changes are required.
Q: Are there any compliance differences between the parts?
A: The SSM3K17FU,LF carries explicit ROHS3 compliance and REACH Unaffected status certifications. Both parts share the same EAR99 export classification and HTSUS code.
Q: Does the Tape & Reel packaging affect component performance?
A: No. Tape & Reel is a supply format for automated assembly processes. The individual component specifications and performance remain unchanged.
Q: What is the Moisture Sensitivity Level for both parts?
A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.
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