KDA-E4F Leach International, KDA-E4F Datasheet - Page 6

• Manufacturer Part Number: KDA-E4F
• Description: Electromechanical Relay 3PST-NO/SPDT 25A 115VAC Socket
• Manufacturer: Leach International
• Type: Non Latching Relayr

Specifications of KDA-E4F

• Contact Arrangement: 3PST-NO|SPDT
• Ac Coil Voltage: 115 V
• Coil Current: 40 mA
• Mounting: Socket

3. Calculation of coil temperature rise when R initial and R final are known:
Delta T = (234.5 + T
Delta T = Temperature rise (°C)
T
R
R
R
Temperature can also be found by making the R
coefficient of correction graph in Fig. 2, and then finding the corresponding temperature.
EXAMPLE:
Catalog indicates coil resistance of 290 ohm at 25°C. What is the value at 125°C?
From the chart: 290 x 1.39 = 403.31 Ohms.
Date of issue: 6/00
1
1
2
2
= Initial temperature (°C)
= Initial resistance (Ohms)
= Final resistance (Ohms)
= K
2
R
1
1
) (R
2
/R
TEMPERATURE CORRECTION CHART FOR RESISTANCE
1
- 1)
2
/R
1
ratio = the
Fig. 2
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