CDBM450C24 LUGUANG | Alldatasheet
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Technical content
- Application This specification is applicable to ceramic discriminator CDBM450C24 use for communication equipment. 2. Electrical Characteristics This discriminator must need following performance. 2-1) Anti-resonate frequency (Fa) : 450 ±1.5 KHz. 2-2) Resonant Impedance (Ri): 70 ohms Max. 2-3) ΔF ( F a - F r ) : 4 8 ±5.0 KHz. Fr: resonant frequency 2-4) Capacitance (at 1 kHz) : 550 pF ±20%. 3. Environmental Test 3-1) Temperature Characteristics At the temperature range of 25 ±5℃,the discriminators shall meet the electrical properties in item 2-1~2-4,and at –20~+80 ℃ the Anti-resonant frequency shall not very more than ±2.0 kHz. 3-2) Vibration The discriminators shall suffer no m echanical damage and meet the 2-1~2-4 electrical Characteristics af ter being vibrated with a sine wave motion having an amplitude of 1.0 mm from 10 to 55KHz per 1 minute, applied for 30 minutes in three different directions (x,y,z). 3-3) Humidity The discriminators shall be place in a humidity chamber at 90~95% relative humidity and 40~45 ℃ for a period of minimum 8 hours. The discriminators shall be left for the pe riod of more than 24 hours at the room temperature after its removal from the humidity chamber.The discriminators shall meet the 2-1~2-4 electrical characteristics and the appearance of discriminators is to be normal. 3-4) Dropped Shock The discriminators shall suffer no mechanical damage and meet the 2-1~2-4 electrical characteristics outlined on this specification after being dropped 3 times to concrete floor from the 30 cm height. 3-5) Solder ability The terminal surface shall be covered over 3/4 by the solder after dipped the leads into 230±5℃ solder pot containing (Sn 63% Pb 37%) molten alloy for 3±1 seconds. 3-6) Soldering Heat-Resistance The discriminators shall be assembled to the 1 mm “through-hole” P.C. bored and placed in solder solution (Sn63% Pb37%) at 250±10℃ for duration of 3±1 seconds. After removal from the solder solution chamber, the discriminators may be cleaned with chlorothene and le ft for more then 24 hours at the room CDBM450C24 Ceramic Discriminator http://www.luguang.cn mail:lge@luguang.cn
temperature. The discriminators shall meet the 2-1~2-4 electrical characteristics are to be normal. 3-7) Lead Strength The discriminators shall suffer no mech anical damage and meet the 2-1~2-4 electrical characteristics outlined on this specification after static load of 1.0 kg for 1 minute is applied in the direction of the insertion side. 3-8) Temperature The discriminators shall be held at each cycle consist of three temperature levels(-20,+25,+80℃) for a period of each 30 minute and repeated 3 cycles. After the test the discriminators may be left for more than 24 hours at the room temperature. The discriminators shall meet the 2-1~2-4 electrical characteristics outlined on this specification and the appearance of discriminators is to be normal. 4. Appearance 4-1) Appearance and dimension may conform to Fig.1 4-2) Identification The following shall be permanently and legibly marked. 5. Dimensions (unit mm) Fig 1. CDBM450C24 Ceramic Discriminator http://www.luguang.cn mail:lge@luguang.cn