A Product Line of Diodes Incorporated ZUMT491 NPN SMALL SIGNAL SURFACE MOUNT TRANSISTOR IN SOT323 Features Mechanical Data Low saturation voltage Case: SOT323 500mW power dissipation Case material: molded plastic. Green molding compound. I = 1A high Continuous Current UL Flammability Rating 94V-0 C Ideally suited for space / weight critical applicatons Moisture Sensitivity: Level 1 per J-STD-020 Terminals: Finish - Matte Tin Plated Leads, Solderable per Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2) MIL-STD-202, Method 208 Halogen and Antimony Free. Green Device (Note 3) Weight: 0.006 grams (Approximate) Qualified to AEC-Q101 Standards for High Reliability SOT323 C E C B B E Top View Top View Device Symbol Pin Out Ordering Information (Note 4) Product Marking Reel size (inches) Tape width (mm) Quantity per reel ZUMT491TA T91 7 8 3,000 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See A Product Line of Diodes Incorporated ZUMT491 Maximum Ratings ( T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit Collector-Base Voltage 80 V V CBO Collector-Emitter Voltage 60 V V CEO Emitter-Base Voltage 7 V V EBO Continuous Collector Current I 1 A C Peak Pulse Current I 2 A CM Base Current I 200 mA B Thermal Characteristics ( T = +25C, unless otherwise specified.) A Characteristic Symbol Value Unit Power Dissipation (Note 5) 500 mW P D Thermal Resistance, Junction to Ambient (Note 5) R 250 C/W JA Thermal Resistance, Junction to Leads (Note 6) R 350 C/W JL Operating and Storage Temperature Range T T -55 to +150 C J, STG Notes: 5. For a device surface mounted on 25mm X 25mm FR4 PCB with high coverage of single sided 1 oz copper, in still air conditions device measured when operating in steady state condition. 6. Thermal resistance from junction to solder-point (at the end of the leads). 2 of 7 October 2012 ZUMT491 Diodes Incorporated www.diodes.com Document number: DS33334 Rev. 3 - 2