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DATA SHEET www.onsemi.com © Semiconductor Components Industries, LLC, 2005 November, 2021 − Rev. 3 1Publication Order Number: BC638/D PNP Epitaxial Silicon Transistor BC638 Features •Switching and Amplifier Applications •Complement to BC637 •These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant ABSOLUTE MAXIMUM RATINGS (Values are at T A
= 25°C unless otherwise noted) ParameterSymbolValueUnit Power DissipationP D 1W Dissipation Derate Above 25°CP D 8mW/°C Thermal Resistance, Junction−to−Ambient R q JA 125°C/W 1. PCB size: FR−4, 76 mm x 114 mm x 1.57 mm (3.0 inch x 4.5 inch x 0.062 inch) with minimum land pattern size. MARKING DIAGRAM 1. Emitter 2. Collector 3. Base TO−92−3 CASE 135AR 1 2 3 ABC 638 YWW See detailed ordering and shipping information on page 2 of this data sheet. ORDERING INFORMATION Bent Lead A= Assembly Code BC638 = Device Code YWW = Date Code