MF Series: ( DIP TYPE ) ◆ Features ■ Quick and repeated response ■ Small capacitance. ■ Stably absorb surge. ■ Small devices in electronic circuit and no polarity. ◆ Application ■ Surge protection for equipment connected to ISDN or LAN etc. ■ Devices connecting telecommunication line.Telephone, Fax machine, XDSL, Modem etc. ■ Devices connecting antenna or signal line. Booster, Car radio set etc. ■ Devices that need protection against electrostatic Display unit, Monitor TV, etc. ■ Used to protect switching power supplies and uninterruptible power systems.(u.p.s) 1. SCOPE : This specification covers the MF SWITCHING DIODE series for manufacturing gas tube arrestors with the micro-gap system. 2. Part : : PartNumber Number Series Name MF – 301 DC Spark over voltage M – 3 Tolerance: KÆ ±10% LÆ ±15% MÆ ±20% NÆ ±30% 3. TEMPERATURE RANGE : 1)Operating temperature range : -40 ~ +125℃ 2)Storage temperature range : -55 ~ +125℃ A Dimension: Package: 3 Æ Φ3.1mm A: Axial Taping 7 Æ Φ2.6mm R: Radial Taping 4. STRUCTURE : 5. DIMENSION : Symbol D1 Dimension (mm) Φ3.1 ± 0.2 Φ2.6 ± 0.2 D2 Φ0.5 ± 0.02 L1 6.7 ± 1.0 L2 30.0 ± 3.0 6. MARKING : MF marking shows part number, manufacturing lot number with three colors bands. Distance between first color band and second color band is wider than that between second and third color band. #1COLOR MARK #2, #3 DATED CODE (Unit : Weekly) Black 0 0 Brown 1 1 Red MF-201 2 2 Orange MF-301 3 3 Yellow MF-401 4 4 Green MF-501 5 5 Blue MF-601 / 6 Purple / / 7 Gray / / 8 White MF-141 / 9 7.Eiectrical Characteristics: Insulation resistance Part number DC spark over Voltage IR ( MΩ ) Vs ( V ) Applied Capacitance Voltage C (pF) MF- 141 M 112 ~ 168 ≧100 DC100V ≦1 MF- 201 M 160 ~ 240 ≧100 DC100V ≦1 MF- 301 M 240 ~ 360 ≧100 DC100V ≦1 MF- 401 M 320 ~ 480 ≧100 DC250V ≦1 MF- 501 M 400 ~ 600 ≧100 DC250V ≦1 MF- 601 M 480 ~ 720 ≧100 DC250V ≦1 8. PERFORMANCE : No. Item Test condition 1 Standard test condition Standard condition/temperature : 5℃ ~ 35℃ humidity : 45% ~ 85%RH Best condition /temperature : 25℃ humidity : 45%RH 2 Appearance Outer appearance shall be visually examined. No visual damage 3 DC Spark over voltage Measure starting discharge voltage by gradually increasing applied DC voltage. Test current is 1mA max, and test period is 1 second max. Meet specified value 4 Insulation resistance Measure the insulation resistance across the terminal at regulated voltage. 100MΩ 5 Electrostatic capacitance Measure the electrostatic capacitance by applying a voltage of less than 6V (at 1KHz) between terminals. 1pF or less 6 Cold resistance The specimen shall be subjected to-55±3℃ for 1000 hours without load then stored at room temperature and humidity for 4 hours Thereafter, the characteristics of items 2,3,4 and 5 Meet specified value shall be measured. (in accordance with JIS C 0020) Requirements 7 Heat resistance The specimen shall be subjected to-125±2℃ for 1000 hours without load then stored at room temperature and humidity for 4 hours Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0021) 8 Humidity resistance The specimen shall be subjected to 85±2℃ for Meet specified 1000 hours without load and then stored at room value temperature and humidity for 4 hours. After 40℃/90-95%RH(1000 hrs) normal temperature/normal humidity (1 hour) cycle. (in accordance with JIS C0021) 9 Temperature cycle Repeat the temperature cycle shown below 25 times then store parts at room temperature and humidity for 4 hours. Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. Step Temperature Period 1 -55±3℃ 30mimutes 2 Room Temp 3minutes 3 125±2℃ 30minutes 4 Room Temp 3minutes Meet specified value Meet specified value (in accordance with JIS C 0025) 10 Vibration The specimen shall be vibrated by its metal wires Meet specified with a total amplitude of 1.5mm and a varying value frequency of 10~55~10HZ(each minutes) for a period of 60 minutes respectively in each X,Y and Z directions. Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0040) 11 Metal wire pull strength After gradually applying a 0.51kgf load, keep the Meet specified unit fixed for 30 seconds. value Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0040) 12 Metal wire bending strength 13 Solderability 14 Resistance to soldering heat 15 Surge life test 16 Surge current Capacity The unit shall be second with its metal wire kept vertical and a 0.25kgf weight applied below in the axial direction. The metal wire shall gradually be bend to 90° in one direction at a point of 3mm from the body along the radius of curvature (0.75~0.80mm), and again back to the original position. This shall be repeated 2 times. Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0051) After dipping the metal wire 3mm of the body in 260℃±5℃ solder for 5±0.5 seconds, the metal wire shall be visually examined. (in accordance with JIS C 005,4-6) After dipping the metal wire 3mm of the body in 350±10℃ solder for 3±1 seconds, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0050) Apply a standard impulse voltage (10x1000) μ sec.) of 1000V for 6 times with an interval of 30 seconds. The change the polarity of the surge and apply the impulse again for another 6 times. And similarly, apply a impulse voltage (10x1000) μ sec.) of 1000V. Total number of a impulse voltage applied is 24 times. Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (See figure 1) Apply a standard impulse current(8x20) μ sec) of 1000A(1000A/Φ2.6mm,2000A/Φ3.1mm)for 3 times with an interval of 5 minutes between each impulse. ★ Note : The metal wire is lead-free and to meet EU RoHS requirement. 9.PERFORMANCE (continued) : figure.1 Surge life test circuit Meet specified value. ★(Note) Metal wire is almost evenly covered with solder. Meet specified value ︱ △Vs/Vs︳ ≦30﹪ Characteristics of items 1,3 and 4 must meet the specified value. No cracks and wire breaking 10.PACKING (continued) : (1). Ax ial taping : Symbol Dimension(mm) W 52.0 ±2 .0 P 5.0 ± 0.5 L1-L2 1 max T 6.0 ± 1.0 Z 1.2 max R 7A SERIES J 2000PCS / Box 40000PCS / Carton 3A SERIES J 1500PCS / Box 30000PCS / Carton (2). Ra dial t aping : Symbol Dimension (mm) P 12.7 ± 1.0 P0 12.7 ± 0.3 P1 3.85 ± 0.5 P2 6.35 ± 1.3 F 5.0 ± 0.5 W 18.0 ± 1.0 W1 9.0 ± 0.5 H0 16.0 ± 0.5 H1 32.25 MAX D0 4.0 ± 0.2 7R SERIES J 1000PCS / Box 21000PCS / Box Terminal must not Project from the tape T 3.2 min S 0.8 max