E2550 0072 The Model TBU-KE Series is obsolete Features and not recommended for new Superior circuit protection designs. The Model TBU-DT Series Overcurrent and overvoltage protection is the recommended alternative but is not pin-to-pin compatible. Blocks surges up to rated limits High-speed performance Small SMT package RoHS compliant* Agency recognition: TBU-KE Series - TBU High-Speed Protectors General Information Agency Approval The TBU-KE Series of Bourns TBU Description (Transient Blocking Unit) products are very Line Side Load Side 12 UL File Number: E315805 low capacitance unidirectional high-speed surge protection components designed to protect against faults caused by short circuits, AC TBU Device power cross, induction and lightning surges. The TBU-KE is a unidirectional TBU device: the TBU protector will trip in less than 1 s when the current reaches the maximum value in one direction only, that is when Pin 1 is positive in voltage with respect to Pin 2. No current limiting exists in the oppo- site polarity, and the TBU protector appears as resistive in nature. The reverse current should not exceed the maximum trigger current level of the TBU device. An external diode may be used to prevent reverse current in DC biased applications. The TBU protector blocks surges and provides an effective barrier behind which sensi- tive electronics will not be exposed to large voltages or currents during surge events. After the surge, the TBU device resets when the voltage across the TBU device falls to the V level. The TBU device will automatically reset on lines which have no DC reset bias or have DC bias below V (such as unpowered signal lines). reset The TBU device is provided in a surface mount DFN package and meets industry standard requirements such as RoHS and Pb Free solder re ow pro les. Absolute Maximum Ratings ( T = 25 C Unless Otherwise Noted) A Symbol Parameter Part Number Value Unit TBU-KE025-xxx-WH 250 V Peak impulse voltage withstand with duration less than 10 ms TBU-KE040-xxx-WH 400 V imp TBU-KE050-xxx-WH 500 TBU-KE025-xxx-WH 100 V Continuous A.C. RMS voltage TBU-KE040-xxx-WH 200 V rms TBU-KE050-xxx-WH 250 T Operating temperature range -40 to +125 C op T Storage temperature range -65 to +150 C stg Asia-Paci c: Tel: +886-2 2562-4117 Fax: +886-2 2562-4116 EMEA: Tel: +36 88 520 390 Fax: +36 88 520 211 The Americas: Tel: +1-951 781-5500 Fax: +1-951 781-5700 www.bourns.com *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Speci cations are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their speci c applications. OBSOLETE *RoHS COMPLIANTApplications Set top box LNB ports Protection modules and dongles Process control equipment Test and measurement equipment General electronics TBU-KE Series - TBU High-Speed Protectors Electrical Characteristics ( T = 25 C Unless Otherwise Noted) A Symbol Parameter Part Number Min. Typ. Max. Unit TBU-KExxx-050-WH 50 75 100 TBU-KExxx-100-WH 100 150 200 Current required for the device to go from operating state to I TBU-KExxx-200-WH 200 300 400 mA trigger protected state TBU-KExxx-300-WH 300 450 600 TBU-KExxx-500-WH 500 750 1000 V = 250 V I (min.) = 50 mA TBU-KE025-050-WH 12.5 14.6 imp trigger V = 250 V I (min.) = 100 mA TBU-KE025-100-WH 6.3 7.5 imp trigger V = 250 V I (min.) = 200 mA TBU-KE025-200-WH 3.4 4.1 imp trigger V = 250 V I (min.) = 300 mA TBU-KE025-300-WH 2.4 3.1 imp trigger V = 250 V I (min.) = 500 mA TBU-KE025-500-WH 1.8 2.3 imp trigger V = 400 V I (min.) = 50 mA TBU-KE040-050-WH 13.0 15.2 imp trigger V = 400 V I (min.) = 100 mA TBU-KE040-100-WH 6.8 8.1 imp trigger Series resistance of R V = 400 V I (min.) = 200 mA TBU-KE040-200-WH 3.9 4.7 device imp trigger the TBU device V = 400 V I (min.) = 300 mA TBU-KE040-300-WH 3.0 3.7 imp trigger V = 400 V I (min.) = 500 mA TBU-KE040-500-WH 2.3 2.9 imp trigger V = 500 V I (min.) = 50 mA TBU-KE050-050-WH 13.7 16.0 imp trigger V = 500 V I (min.) = 100 mA TBU-KE050-100-WH 7.5 8.9 imp trigger V = 500 V I (min.) = 200 mA TBU-KE050-200-WH 4.6 5.5 imp trigger V = 500 V I (min.) = 300 mA TBU-KE050-300-WH 3.6 4.5 imp trigger V = 500 V I (min.) = 500 mA TBU-KE050-500-WH 3.0 3.6 imp trigger t Time for the device to go from normal operating state to protected state 1 s block I Current through the triggered TBU device with 50 Vdc circuit voltage 0.25 0.50 1.00 mA Q V Voltage below which the triggered TBU device will transition to normal operating state 10 14 18 V reset R Junction to package pads - FR4 using recommended pad layout 116 C/W th(j-l) 2 R Junction to package pads - FR4 using heat sink on board (6 cm) 96 C/W th(j-l) Speci cations are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their speci c applications. OBSOLETE