Gas Discharge Tube (GDT) Products VIS Series RoHS VIS Series Description The VIS series is a two-terminal, bi-directional, voltage triggered switch, specically for ignition circuits used in high pressure HID lighting. The gas plasma trigger technology offers very fast switch speeds with improved di/dt values compared to similar function silicon based devices. Switching voltages are xed depending on the part number selected. Features t P)4 DPNQMJBOU 3 allows for optimum Schematic Symbol performance of ignition t PS IBNCFS G FSBNJD D transformers. ultimate reliability. BQF BOE SFFM UP & t 5 I TQFFE FS t Z IJHI TXJUD 7 481-1 when switch voltage acheived. High di/dt Device Series Ratings: Applications Max Load Current IJOH TUPSFE t XJUD 4 t *O HBT GVFM JHOJUJPO electrical energy (such systems and similar Max Switching Frequency 25Hz - VIS 230 200Hz - VIS 400 to VIS 800 as capacitive discharge) circuits at predetermined Operating Temperature T UP OP voltages. Storage Temperature T UP STG Insulation Resistance 100 M Capacitance 1.5 pF Device Specications Switching Initial Voltage, Electrical Life Electrical Life Discharge Peak Initial Break 1 Operations First Ignition Breakdown First Ignition 2 Current Down Voltage Part Number 2 3 (Electrical Life) Value Voltage Values Values Amps of cycles typ Volts Volts Volts Volts VIS 230 300 2,000,000 200-255 280 200-280 280 VIS 400 500 100,000 350-460 460 340-460 500 VIS 600 1000 30,000 528-627 720 510-690 750 VIS 800 400 200,000 704-896 950 680-920 1000 Notes: 1. Number of switching operations depends on peak surge current, operating frequency and ambient temperature. PS BEEJUJPOBM EFUFTU JSDVJUTw TFDUJPO PG UIJT EBU BJMT B TIFFU G 5 5JNF F i&MFDUSJDBM -JG FS UP FG 3 2. Measured at 100 volts per second. 3. Measured after 24 hours of darkness. 2011 Littelfuse, Inc. 53 VIS Series Specications are subject to change without notice. Revised: December 18, 2011 Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specic applications.Gas Discharge Tube (GDT) Products VIS Series Electrical Life Time - Test Circuits VIS 230 Life Test Circuit VIS 400 Life Test Circuit 15 K 10 K 10 H 0.5 H 230 V 500 V V V AC DC 2.2 F 680 nF VIS 230 VIS 400 2,000,000 operations 100,000 operations 10 - 25Hz 1 sec. on, 10 sec. off Testing Temperature 25C Testing Temperature 25C VIS 600 Life Test Circuit VIS 800 Life Test Circuit 13 K 68 K 0.1 H 0.5 H V 750 V V 1000 V DC DC 470 nF 100 nF VIS 600 VIS 800 30,000 operations 200,000 operations 1 sec. on, 10 sec. off 1 sec. on, 10 sec. off Testing Temperature 25C Testing Temperature 25C Soldering Parameters - Wave Soldering (Thru-Hole Devices) 300 Recommended Process Parameters: 280 Wave Parameter Lead-Free Recommendation 260 240 Preheat: 220 ZQJDBM *OEVTUS FDPNNFOEBUJPO Z 3 5 VSF FNQFSBU 5 BUJPO DUJW %FQFOET PO MVY 200 Temperature Minimum: 100 180 160 Temperature Maximum: 150 140 Preheat Time: 60-180 seconds 120 100 Solder Pot Temperature: 280 .BYJNVN 80 Solder Dwell Time: 2-5 seconds 60 40 20 0 Time (Seconds) Preheat Time Cooling Time Dwell Time Soldering Parameters - Hand Soldering VSF FNQFSBU 5 4PMEFS *SPO Heating Time: 5 seconds max. 2011 Littelfuse, Inc. 54 VIS Series Specications are subject to change without notice. Revised: December 18, 2011 Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specic applications. Temperature (C) - Measured on bottom side of board 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240