
Features:
Hydrogen dielectric for power switching high
current loads
400 A carry, 2,500 A interrupt @ 320 Vdc
Ideal for circuit protection, control, battery
switching, and main power safety disconnect
Versatile power, voltage, and current
operating range: 28-1800Vdc tested
Low-cost compact version for volume
production applications. Requires external
coil economizer (PWM or lower hold voltage)
Patented "hammer effect" mechanism breaks
light contact welds
Patented "Super-sealed" environment
chamber uniquely protects ALL movingparts
Can operate in harsh environments
Moving contact rotates to provide fresh
contact surface for low contact resistance
Sealed control connector. Mating connector
with flying leads P/N 2005 available, see
page 59
Logic control enabled by external economizer
P/N 9913
High temperature (135
o
C) model with 10 inch
flying leads available (-4A call factory for
sales drawing)
Bi-directional power switching
Fast operate and release time
Features:
16
Kilovac EV250-1A & 1B - 400 Amps ("Czonka II EVX")
Make & Break Load Switching
PRODUCT SPECIFICATIONS
UNIT
COIL DATA***
CONTACT RATINGS*
* For circuit conditions and actual data refer to the EV250 hot switch study. Since each application is unique, user is encouraged to verify rating in
actual application.
28-1800 Vdc
Sample Part No.
Coil Voltage
A = 12 Vdc, Nominal
B = 24 Vdc, Nominal
EV250-1
A
PART NUMBER SELECTION
For detailed specifications and recommendations,
refer to the EV250-1A & B sales drawings.
Parameter
Voltage* (nominal )
Pickup (close), max.
Continuous Hold, max/min **
Dropout (open), min.
Coil Resistance
@ 25
o
C, +/- 10%
Coil Energy, max.
Coil Clamping
* Do not apply continously. Requires external coil economizer. Other special coil
voltages available upon request.
* * At maximum continuous current and maximum ambient temperature. Hold
voltage must be maintained within the limits specified to keep contacts closed
and to prevent coil overheating.
* * * Do not use a free wheeling diode or capacitor across the coil.
Units
Vdc
Ohms
J
EV250-1A
12
8.3
5.1/3.8
0.88 - 3.3
3
0.2
3 x nom.
EV250-1B
24
16.6
10.2/7.6
2.4 - 6.6
12
0.2
3 x nom.
*
Refer to Page 19 for actual mix of precharge and break currents used on each cycle.
1
1 0
1 0 0
1 , 0 0 0
1 0 , 0 0 0
1 0 0 , 0 0 0
1
1 0
1 0 0
Switching Current
1 , 0 0 0
1 0 , 0 0 0
1 0 0 , 0 0 0
28Vdc
L
270Vd
400Vdc
600Vdc
900Vdc
10Vc
R egion of
C ontact
Levitation.
O peration
P rohibited
M om entary C arry
R egion
400A
9000A
120Vdc
Part Number
Contact Arrangement ..........................................................
Contact Form ........................................................................
Continuous Current Carry, Max. ........................................
6.5 Minutes ....................................................................
Break Current @ 320 Vdc ...................................................
Contact Resistance, Max. ...................................................
Contact Resistance, Typ. ....................................................
Dielectric at Sea Level (leakage < 1mA) ............................
Shock, 11 ms 1/2 Sine (peak), operating .........................
Vibration, Sinusoidal (80-2000 Hz, peak) .........................
Operating Ambient Temperature Range ............................
Load Life, @320 Vdc, 95% Weibull*.................................
Operate Time, 25
o
C..............................................................
Close (includes bounce) Typ. ......................................
Bounce (after close only), Max. ..................................
Open (includes arcing), Max. ......................................
Insulation Resistance @ 500 Vdc, Min. ............................
Weight, Nominal ..................................................................
o
o
cycles
EV250-1A
SPST-NO
EV250-1B
SPST-NO
X
X
A
A
A
400
500
2,500
0.0003
400
500
2,500
0.0003
ohms
ohms
Vrms
G's Peak
G's
C
0.0001 - 0.0002
2,200
30
20
-40 to +85
See Page 19
0.0001 - 0.0002
2,200
30
20
-40 to +85
See Page 19
ms
ms
ms
30
5
15
100
30
5
15
100
Mohm
pound (kg)
1.54 (0.7)
1.54 (0.7)
Tyco Electronics
/ www.tycoelectronics.com / Factory Direct Technical Support: 800-253-4560, ext. 2023 (U.S., Canada, Mexico) or 805-220-2020, ext. 2023 (International)
Note:
Dimensions in inches. Multiply values by 25.4 for dimensions in mm.