UF308

UF304 / UF308 3A Ultra Fast Switching Rectifiers High Efficiency Features: • Fast reverse recovery time, trr. • Low forward voltage, VF. • Low cost axial packages. DO-201AD • Void-free plastic in DO-201AD package. • 3.0 Ampere operation at TA = 55°C with no thermal runaway. • Exceeds environmental standards of MIL-S-19500/228. • Ultra fast switching for high efficiency. Mechanical Data: Case Terminals Polarity Mounting Position : Moulded plastic. : Axial leads, solderable per MIL-STD-202, Method 208. : Band denotes cathode. : Any. Dimensions : Inches (Millimetres) Maximum Ratings and Electrical Characteristics: Ratings at 25°C ambient temperature unless otherwise specified. Resistive or inductive load, 60Hz. Parameters Peak reverse voltage, repetitive; VRM Maximum RMS voltage DC blocking voltage; VR Average forward current, Io at TA = 55°C 3.8” lead length, 60Hz, resistive or inductive load Peak forward surge current IFM (surge) 8.3m seconds single half sine-wave superimposed on rated load (JEDEC method) Maximum forward voltage VF at 3.0A, 25°C Maximum reverse current at rated reverse voltage TJ = 25°C TJ = 100°C 75 20.0 50 -55 to +150 75 UF304 400 280 400 3.0 A 150 1.1 10.0 500 50 1.7 V mA mA pF °C/W ns °C UF308 800 560 800 V Units Typical junction capacitance (Note 1) CJ Typical junction resistance (Note 2) RθJA Reverse recovery time IF = 0.5A, IR = 1A, Irr = 0.25A Operating and storage temperature range Page 1 24/10/05 V1.0 UF304 / UF308 3A Ultra Fast Switching Rectifiers Notes: 1. Measured at 1MHz and applied reverse voltage of 4.0V dc. 2. Thermal resistance from junction to ambient and from junction to lead length 0.375” (9.5mm) PCB mounted. Rating and Characteristics Curves NOTE: 1. Rise Time = 7ns maximum Input Impedance = 1MΩ, 22pF 2. Rise Time = 10ns maximum Source Impedance = 50Ω Set Time Base For 50ns/cm Figure 1 - Reverse Recovery Time Characteristics and Test Circuit Diagram Average Forward Current (10)-AMP (10)-AAV IFM, Apk Ambient Temperature, °C Figure 3 - Forward Current Derating Curve Forward Voltage-VFM(Vpk) Figure 2 - Forward Characteristics Page 2 24/10/05 V1.0 UF304 / UF308 3A Ultra Fast Switching Rectifiers Instantaneous Reverse Leakage Current, Micro Amperes Peak Forward Surge Current, Amperes Number of Cycles at 60Hz Figure 5 - Peak Forward Surge Current Percent of Rated Peak Reverse Voltage, % Figure 4 - Typical Reverse Leakage Characteristics Specifications VRRM maximum (V) 400 800 IF(av) (A) IFSM (A) trr maximum (ns) 50 75 VF (V) at IF = 3.0A 1.1 1.7 Length Diameter Part Number 3.0 150 9.5 5.3 UF304 UF308 Dimensions : Millimetres Page 3 24/10/05 V1.0 UF304 / UF308 3A Ultra Fast Switching Rectifiers Notes: International Sales Offices: AUSTRALIA – Farnell InOne Tel No: ++ 61 2 9645 8888 Fax No: ++ 61 2 9644 7898 FINLAND – Farnell InOne Tel No: ++ 358 9 560 7780 Fax No: ++ 358 9 345 5411 NETHERLANDS – Farnell InOne Tel No: ++ 31 30 241 7373 Fax No: ++ 31 30 241 7333 SWITZERLAND – Farnell InOne Tel No: ++ 41 1 204 64 64 Fax No: ++ 41 1 204 64 54 AUSTRIA – Farnell InOne Tel No: ++ 43 662 2180 680 Fax No: ++ 43 662 2180 670 FRANCE – Farnell InOne Tel No: ++ 33 474 68 99 99 Fax No: ++ 33 474 68 99 90 NEW ZEALAND – Farnell InOne Tel No: ++ 64 9 357 0646 Fax No: ++ 64 9 357 0656 UK – Farnell InOne Tel No: ++ 44 8701 200 200 Fax No: ++ 44 8701 200 201 BELGIUM – Farnell InOne Tel No: ++ 32 3 475 2810 Fax No: ++ 32 3 227 3648 GERMANY – Farnell InOne Tel No: ++ 49 89 61 39 39 39 Fax No: ++ 49 89 613 59 01 NORWAY – Farnell InOne Tel No: ++ 45 44 53 66 66 Fax No: ++ 45 44 53 66 02 UK – BuckHickman InOne ++ 44 8450 510 150 ++ 44 8450 510 130 BRAZIL – Farnell-Newark InOne Tel No: ++ 55 11 4066 9400 Fax No: ++ 55 11 4066 9410 HONG KONG – Farnell-Newark InOne Tel No: ++ 852 2268 9888 Fax No: ++ 852 2268 9899 PORTUGAL – Farnell InOne Tel No: ++ 34 93 475 8804 Fax No: ++ 34 93 474 5288 UK – CPC ++ 44 8701 202 530 ++ 44 8701 202 531 CHINA – Farnell-Newark InOne Tel No: ++86 10 6238 5152 Fax No: ++86 10 6238 5022 IRELAND – Farnell InOne Tel No: ++ 353 1 830 9277 Fax No: ++ 353 1 830 9016 SINGAPORE – Farnell-Newark InOne Tel No: ++ 65 6788 0200 export EXPORT – Farnell InOne Tel No: ++ 44 8701 200 208 Fax No: ++ 44 8701 200 209 Fax No: ++ 65 6788 0300 For enquiries from all other markets DENMARK – Farnell InOne Tel No: ++ 45 44 53 66 44 Fax No: ++ 45 44 53 66 06 ITALY – Farnell InOne Tel No: ++ 39 02 93 995 200 Fax No: ++ 39 02 93 995 300 SPAIN – Farnell InOne Tel No: ++ 34 93 475 8805 Fax No: ++ 34 93 474 5107 http://www.farnellinone.com ESTONIA – Farnell InOne Tel No: ++ 358 9 560 7780 Fax No: ++ 358 9 345 5411 Farnell-Newark InOne Tel No: ++ 60 3 7873 8000 Fax No: ++ 60 3 7873 7000 MALAYSIA – SWEDEN – Farnell InOne Tel No: ++ 46 8 730 50 00 Fax No: ++ 46 8 83 52 62 http://www.buckhickmaninone.com http://www.cpc.co.uk Disclaimer This data sheet and its contents (the "Information") belong to the Premier Farnell Group (the "Group") or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded. 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