Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Manufacturer | onsemi |
| Exact MPN | MMBFJ112 |
| Product Category | JFETs |
| Package | SOT-23-3L |
| Packing | 3,000 pcs/reel |
| Configuration | 1 N-channel |
| Gate-Source Cutoff Voltage (VGS(off)) | 1V |
| Gate-Source Breakdown Voltage (VGSS) | 35V |
| Power Dissipation (PD) | 350mW |
Product Overview
MMBFJ112 is a onsemi device in the JFETs category, supplied in a SOT-23-3L package.
Verified selection data includes Configuration: 1 N-channel, Gate-Source Cutoff Voltage (VGS(off)): 1V, Gate-Source Breakdown Voltage (VGSS): 35V, Power Dissipation (PD): 350mW.
The specified 50 Ω on-resistance supports low-level switching, but 28 pF on-capacitance can dominate high-impedance node settling.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | onsemi |
| Exact MPN | MMBFJ112 |
| Functional Category | JFETs |
| Package | SOT-23-3L |
| Packing | 3,000 pcs/reel |
| Source Catalog ID | C258195 |
| Configuration | 1 N-channel |
| Gate-Source Cutoff Voltage (VGS(off)) | 1V |
| Gate-Source Breakdown Voltage (VGSS) | 35V |
| Power Dissipation (PD) | 350mW |
| Manufacturer Status | Active. |
Selection Notes
I_{DSS}; cutoff voltage; on-resistance; on/off capacitance; SOT-23 versus TO-92 family variants.
Match channel polarity, VGS(off), breakdown voltage, current range and dissipation to the analog switch or bias point.
Manufacturer Decision-Relevant Notes
V_{(BR)GSS} min 35 V; V_{GS(off)} min -1.0 V, max -5.0 V; I_{DSS} min 5.0 mA at V_{DS}=15 V, V_{GS}=0; r_{DS(on)} max 50 Ω at V_{DS}≤0.1 V, V_{GS}=0; on-capacitance max 28 pF at 1 MHz; off gate capacitances max 5 pF at 1 MHz; I_{D(off)} max 1 nA under the datasheet cutoff test.
Design Considerations
- Verify the gate-drive range across -1 to -5 V cutoff; include 28 pF in acquisition/settling simulations; verify the 35 V gate breakdown margin; check the 350 mW SOT-23 dissipation and thermal derating.
Application Fit
Low-level analog switching, sample-and-hold, chopper amplifiers.
Exact Variant and Procurement Notes
Exact MPN MMBFJ112; SOT-23, top mark 6R, Pb-free, 3,000/tape-and-reel.
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 MMBFJ112 quotation, provide the exact MPN, required quantity, destination, target Date Code if applicable, and any inspection or testing requirements.
