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KD44CF Fiches technique(PDF) 4 Page - Willow Technologies Ltd

No de pièce KD44CF
Description  DC Solid-State Relay
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Fabricant  WILLOW [Willow Technologies Ltd]
Site Internet  http://www.willow.co.uk
Logo WILLOW - Willow Technologies Ltd

KD44CF Fiches technique(HTML) 4 Page - Willow Technologies Ltd

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KD44CF 4
SPECIFICATIONS ARE SUBjECT TO CHANGE WITHOUT NOTICE
© 2008 TELEDYNE RELAYS
KD44CF\032008\Q1
NOTES:
1. Control input is compatible with CMOS or open collector TTL (with pull up resistor). For bias voltages above 6V, a series resistor is
required. Use the standard resistor value equal to or less than the value found in Figure 4.
2. The rated input voltage is 5V for all tests unless otherwise specified.
3. To calculate the maximum ON resistance for a given junction temperature, find the normalized ON resistance factor (NR) from
Figure 5. Calculate the new ON resistance as follows:
R
(ON) = NR • RON @ 25°C + 0.15
4. Overload testing to the requirements of MIL-PRF-28750 is constrained to the limits imposed by the short circuit protection
characteristics as defined in this specification. System series inductance for “shorted-load” mode of operation should be 30 µH
maximum. Maximum repetition rate into a shorted load should not exceed 1 Hz.
5. A status pull up resistor is required for proper operation of the status output. Determine the current (Iso) required by the status
interface. Calculate the current (Is) through the status resistor such that the sink current through the status output does not
exceed 15 mA.
R
STATUS
=
V
STATUS - 0.4V
I
S
6. Inductive loads should be diode suppressed. Input transitions should be ≤1 ms duration and the input drive should be a
bounceless contact type.
7. Input transitions should be ≤ 1 msec.
Series KD44CF
TYPICAL TRIP CURRENT CHARACTERISTICS
FOR SHORT CIRCUIT CONDITIONS
FIGURE 7
TYPICAL OVERLOAD CURRENT VS TRIP TIME
FIGURE 5
OUTPUT TURN-ON AND OFF TIMING
FIGURE 6
TIME TO TRIP SECONDS
TIME TO TRIP SECONDS
PULSEWIDTHS ARE TAKEN AT 10% PEAK VALUE


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