Guangdong Uchi Electronics Co.,Ltd
Guangdong Uchi Electronics Co.,Ltd Manufactuer of Varistor, Thermistor, Capacitor,Fuse & Resistor since 2006 !
Add to Cart
Murata DHR4E4C681K2BB Equivalent General Purpose High Voltage Ceramic Disc Capacitors 680pF 15000Volts 10%
■ Features
1. Small size
2. Excellent heat-proof, humidity-proof and high
dielectric strength voltage.
3. Coated with flame-retardant epoxy resin.
4.20 kV rated voltage available on request
• Low losses
• High capacitance in small sizes
• High stability
• Radial leads
• Ceramic singlelayer capacitor
■ Applications
1. Color TV doublers and triplers
2. High voltage DC power supplies (PPCs, X-ray
apparatus, air cleaner, lasers, etc.)
3. Tuning capacitor in focus circuit for display
• TV and monitors • SMPS • DC and pulse high voltage • X-ray equipment
DESIGN
The capacitors consist of a ceramic disc of which both sides are silver-plated. Connection leads are made of tinned copper having diameters of 0.032" (0.81 mm). The capacitors may be supplied with straight leads having lead spacing of 0.375" (9.5 mm), 0.500" (12.7 mm) or 0.750" (19.2 mm). Coating is made of flame retardant epoxy resin in accordance with “UL 94 V-0”.
| CAPACITANCE RANGE | 100 pF to 3300 pF |
| DIELECTRIC STRENGTH BETWEEN LEADS | 10 kVDC 15 000 VDC, 2 s 15 kVDC 24 000 VDC, 2 s (in dielectric fluid) |
| CERAMIC DIELECTRIC | T3M (Class 1) X5F, Y5R, Y5U, Z5U (Class 2) |
| INSULATION RESISTANCE | Min. 1000 OhmF or 200 000 MOhm |
| TOLERANCE ON CAPACITANCE | ± 20 % or + 80 % / - 20 % |
| DISSIPATION FACTOR | 0.2 % max. at 1 kHz; 1 V (Class 1) 2.0 % max. at 1 kHz; 1 V (Class 2) |
| CATEGORY TEMPERATURE RANGE | -25 °C to +85 °C |
| CLIMATIC CATEGORY | ACC. TO EN 60068-1 25/85/21 |
| OPERATING TEMPERATURE RANGE | -25 °C to +105 °C |
■ Example
■ Cap.-Temp. Char.
Applications by Series
Features by Series
Murata's DE series offers both high voltage and safety standard certified ceramic capacitors. The DE series features a wide range of form factors for specific applications including AC line filters, primary-secondary coupling on switching power supplies, high-frequency pulse circuits, horizontal resonance circuits, and decoupling circuits for power supplies.
Now Available! Murata has launched a surface mount type IEC 60384-14*1Y1*2 class safety certified ceramic capacitor for low-profile power supplies. These capacitors are ideal for all AC-DC switching power supplies where a low-profile is sought for compact AV equipment, LED illumination, or 1U*3 rack-mounted equipment.
■ !Caution (Rating)
When DC-rated capacitors are to be used in AC or ripple current circuits, be sure to maintain the Vp-p value of the applied voltage or the Vo-p which contains DC bias within the rated voltage range. When the voltage is applied to the circuit, starting or stopping may generate irregular voltage for a transit period because of resonance or switching. Be sure to use a capacitor with a rated voltage range that includes these irregular voltages
2.Operating Temperature and Self-generated Heat
Keep the surface temperature of a capacitor below the upper limit of its rated operating temperature range. Be sure to take into account the heat generated by the capacitor itself. When the capacitor is used in a highfrequency current, pulse current or similar current, it may self-generate heat due to dielectric loss. The applied voltage load should be such that the capacitor's selfgenerated heat is within 10°C at an atmosphere temperature of 25°C. When measuring, use a thermocouple of small thermal capacity-K of ø0.1mm in conditions where the capacitor is not affected by radiant heat from other components or surrounding ambient fluctuations. Excessive heat may lead to deterioration of the capacitor's characteristics and reliability. (Never attempt to perform measurement with the cooling fan running. Otherwise, accurate measurement cannot be ensured.)
Failure to follow the above cautions may result, worst case, in a short circuit and cause fuming or partial dispersion when the product is used.
■ !Caution (Storage and Operation Condition)
Operating and storage environment
The insulating coating of capacitors does not form a perfect seal; therefore, do not use or store capacitors in a corrosive atmosphere, especially where chloride gas, sulfide gas, acid, alkali, salt or the like are present. And avoid exposure to moisture. The capacitor is designed to be used in insulating media, such as epoxy resin, silicone oil, etc. There must be 3mm or more of insulating media for each direction of the capacitor. Before cleaning, bonding, or molding this product, verify that these processes do not affect product quality by testing the performance of a cleaned, bonded or molded product in the intended equipment. Store the capacitors where the temperature and relative humidity do not exceed -10 to 40 degrees centigrade and 15 to 85%. Use capacitors within 6 months. FAILURE TO FOLLOW THE ABOVE CAUTIONS MAY RESULT, WORST CASE, IN A SHORT CIRCUIT AND CAUSE FUMING OR PARTIAL DISPERSION WHEN THE PRODUCT IS USED.