Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Manufacturer | onsemi |
| Exact MPN | MMBF4393LT1G |
| Product Category | JFETs |
| Package | SOT-23 |
| Packing | 3,000 pcs/reel |
| Configuration | 1 N-channel |
| Gate-Source Cutoff Voltage (VGS(off)) | 500mV |
| Gate-Source Breakdown Voltage (VGSS) | 30V |
| Power Dissipation (PD) | 225mW |
Product Overview
MMBF4393LT1G is a onsemi device in the JFETs category, supplied in a SOT-23 package.
Verified selection data includes Configuration: 1 N-channel, Gate-Source Cutoff Voltage (VGS(off)): 500mV, Gate-Source Breakdown Voltage (VGSS): 30V, Power Dissipation (PD): 225mW.
This is the lowest-current member of the 4391/4392/4393 group; it favors lower-current switching where 100 Ω maximum r_{DS(on)} is acceptable.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | onsemi |
| Exact MPN | MMBF4393LT1G |
| Functional Category | JFETs |
| Package | SOT-23 |
| Packing | 3,000 pcs/reel |
| Source Catalog ID | C152291 |
| Configuration | 1 N-channel |
| Gate-Source Cutoff Voltage (VGS(off)) | 500mV |
| Gate-Source Breakdown Voltage (VGSS) | 30V |
| Power Dissipation (PD) | 225mW |
| Manufacturer Status | Active. |
Selection Notes
I_{DSS}; cutoff voltage; on-resistance; capacitance; standard versus automotive S-prefix.
Match channel polarity, VGS(off), breakdown voltage, current range and dissipation to the analog switch or bias point.
Manufacturer Decision-Relevant Notes
V_{DS}, V_{DG}, V_{GS} max 30 V; I_{DSS} min 5 mA, max 30 mA at V_{DS}=15 V, V_{GS}=0; V_{GS(off)} min -0.5 V, max -3.0 V at V_{DS}=15 V, I_D=10 nA; r_{DS(on)} max 100 Ω at I_D=1 mA; V_{DS(on)} max 0.4 V at I_D=3 mA; C_{iss} max 14 pF; C_{rss} max 3.5 pF.
Design Considerations
- Verify V_{GS} never exceeds ±30 V; design with the full 5–30 mA I_{DSS} spread; check the -0.5 to -3.0 V cutoff range; include 100 Ω worst-case switch resistance and capacitance in timing analysis.
Application Fit
Low-level analog switching, sample-and-hold, chopper amplifiers.
Exact Variant and Procurement Notes
SOT-23, Pb-free, 3,000/tape-and-reel; MMBF4393LT1G is the standard variant, while SMMBF4393LT1G is the automotive-qualified variant.
Manufacturer Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. Physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
For MMBF4393LT1G quotation, provide the exact MPN, required quantity, destination, target Date Code if applicable, and any inspection or testing requirements.
For a higher-current N-channel JFET in the same onsemi switching family, compare MMBF4391LT1G: its specified zero-gate drain-current range is 50–150 mA and maximum on-resistance is 30 Ω, versus 5–30 mA and 100 Ω for MMBF4393LT1G under the manufacturer’s test conditions. Confirm the bias and switching requirements rather than assuming direct interchangeability.
