M MF Series: ( SMD 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.( UPS ) 1. Scope : This specification covers the MF SURGE SUPPRESSOR series for manufacturing gas tube arrestors with the micro-gap system. 2. Partnumber : Example: MF - 301 M - 3D (1) (2) (3) (4) (1) Series name (2) DC Sparkover voltage The first two digits are significant and the third is the number of zeros. Example: 301 Units in volts (V) . 30×10'⇒300V (3) Tolerance of DC Sparkover voltage MARK L M N Tolerance ±15% ±20% ±30% (4) Taping form MARK 3D 4D Form DL-35 DL-41 3. Temperature Range : 1)Operating temperature range : -40 ~ +125℃ 2)Storage temperature range : -55 ~ +125℃ 4. Structure : glass element ( conductive film coating ) gas 5. Dimension : L DL-35 Symbol D DL-41 D Dimension (mm) Φ1.35±0.01 L 3.3±0.05 Symbol Dimension (mm) Φ2.6±0.1 D L 5.0±0.1 6. Rating (Initial characteristics) : Part number DC sparkover voltage MF-141M 112~168 ≧100 DC100V ≦1 MF-201M 160~240 ≧100 DC100V ≦1 MF-301M 240~360 ≧100 DC100V ≦1 MF-401M 320~480 ≧100 DC250V ≦1 MF-501M 400~600 ≧100 DC250V ≦1 MF-601M 480~720 ≧100 DC250V ≦1 Insulation resistance IR(MΩ) Applied voltage Capacitance C (pF) 7. Performance : No 1 Item Standard test condition Test condition Standard condition/temperature: 5~35℃ Best condition Requirements humidity : 45~85%RH. /temperature: 25℃ humidity : 65%RH. 2 Appearance Outer appearance shall be visually examined. No visual damage 3 DC Sparkover 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. 5 Electrostatic capacitance 6 Cold resistance 7 Heat resistance 100MΩ Measure the electrostatic capacitance by applying 1pF or less a voltage of less than 6V (at 1KHZ) between terminals. The specimen shall be subjected to -55±3℃ for Meet specified value 1000 hours without load and 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 0020) The specimen shall be subjected to 125±2℃ for Meet specified value 1000 hours without load and 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) No 8 9 Item Test condition Requirements Humidity resistance The specimen shall be subjected to 85±2℃ for Meet specified value 1000 hours without load and then strored 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) Temperature cycle Repeat the temperature cycle shown below 25 Meet specified value 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 1 2 Temperature -55±3℃ Period 30minutes 3 Room Temp. 125±2℃ 3minutes 30minutes 4 Room Temp 3minutes (in accordance with JIS C 0025) 10 Vibration The specimen shall be vibrated by its lead wires Meet specified value with a total amplitude of 1.5mm and a varying frequency of 10~55~10HZ (each minute) 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 Lead wire pull strength After gradually applying a 0.51kgf load, keep the Meet specified value unit fixed for 30 seconds. Thereafter, the characteristics of items 2,3,4 and 5 shall be measured. (in accordance with JIS C 0051) No Item Test condition Requirements 12 Lead wire bending The unit shall be second with its lead wire kept Meet specified value strength vertical and a 0.25kgf weight applied below in the axial direction. The lead wire shall gradually be bent 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 item 2,3,4 and shall be measured. (in accordance with JIS C 0051) 13 Solderability After dipping the lead wire within 3mm of the body Lead wire is almost in 260±5℃ solder for 5±0.5 seconds, the lead wire evenly covered with shall be visually examined. solder. (in accordance with JIS C 0050, 4-6) 14 Resistance to soldering heat After dipping the lead wire within 3mm of the body Meet specified value 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) 15 Surge life test Apply a standard impulse voltage (10×1000)µ sec.) of 1000V for 6 times with an interval of 30 seconds. Then change the polarity of the surge and apply the impulse again for another 6 times. And similarly, apply a impulse voltage ((100×1000) µ sec.) of 1000 V. 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) 16 Surge current capacity Apply standard impulse current (8×20)µ sec) of 500A(3D),1000A(4D) for 3 times with an interval of 5 minutes between each impulse. |ΔVs/Vs|≤30% Characteristics of items 1,3 and 4 must meet the specified value. No cracks and wire breaking 8. Dimensions and Taping