1. Application

This specification is applicable to ceramic discriminator CDB455C3 use for

communication equipment.

2. Electrical Characteristics

This discriminator must need following performance.

2-1) Anti-resonate frequency (Fa)

:

455±1.5 kHz.

2-2) Resonant Impedance (Ri): 70 ohms Max.

2-3) ΔF(Fa-Fr)

:

48±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 mechanical damage and meet the 2-1~2-4 electrical

Characteristics after 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 period 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 left for more then 24 hours at the room 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 mechanical 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

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