bss138dw.pdf datasheet:

BSS138DWDUAL N-CHANNEL ENHANCEMENT MODE FIELD EFFECT TRANSISTOR Please click here to visit our online spice models database.Features Mechanical Data Low On-Resistance Case: SOT-363 Low Gate Threshold Voltage Case Material: Molded Plastic. Green Molding Compound (Note 6). UL Flammability Classification Rating 94V-0 Low Input Capacitance Moisture Sensitivity: Level 1 per J-STD-020 Fast Switching Speed Terminals: Matte Tin Finish annealed over Alloy 42 leadframe Available in Lead Free/RoHS Compliant Version (Note 4) (Lead Free Plating) Solderable per MIL-STD-202, Method 208 Qualified to AEC-Q101 Standards for High Reliability Terminal Connections: See Diagram "Green" Device (Notes 5 and 6) Marking Information: See Page 3 Ordering Information: See Page 3 Weight: 0.006 grams (approximate)