EVTD Technology (Thermally Protected Varistors)
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Features
- High energy handling capability
- Wide voltage range available: 50VAC – 550VAC
- Multiple diagnostic options (micro switch locations both on top & bottom, on top only or on bottom only)
- Industry standard footprint
- UL1449 and CUL 3rd Edition recognized File #E321567*. All values presently recognized except EVTD34V300K which is pending.
- RoHS compliant
- Exceeds industry standard operating and storage temperatures for this type of device. Rated at -40ºC to +85º
- Patent Pending
*NOTE: Recognized and Approved to UL1449 as a 4 surge protective device component assembly for type 2 applications, and not listed as a Surge Protective Device (this is pending).
EVTD's are intended, in conjunction with appropriate enclosure design, to help facilitate TVSS module compliance to UL1449. Under extreme abnormal over-voltage conditions, some units will exhibit substantial heating, arcing and venting prior to opening. Modules should be designed to contain this possibility.
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Electrical Characteristics
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Part
Number
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Maximum Continuous
Rated Voltage
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Varistor Voltage
@1.0 mA (DC)
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Maximum Clamping
Voltage
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Maximum Peak
Current
(8/20μs KA)
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Maximum
Energy
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AC RMS
Volts
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DC
Volts
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Min
Volts
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Nominal
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Max
Volts
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VC
(Volts)
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IP
(Amps)
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15 pulses*
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1 pulse
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10/1000µs
(joule)
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EVTD34V50K
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50
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65
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74
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82
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90
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135
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300
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20
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45
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156
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EVTD34V60K
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60
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85
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90
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100
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110
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165
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300
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20
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45
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195
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EVTD34V75K
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75
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100
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108
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120
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132
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200
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300
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20
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45
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235
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EVTD34V150K
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150
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200
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222
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246
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270
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395
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300
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20
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50
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480
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EVTD34V180K
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180
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230
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256
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283
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310
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470
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300
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20
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50
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540
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EVTD34V250K
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250
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320
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371
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410
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449
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650
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300
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20
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50
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830
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EVTD34V275K
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275
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350
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410
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453
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496
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710
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300
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20
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50
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920
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EVTD34V300K
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300
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385
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423
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471
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517
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775
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300
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20
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50
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1000
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EVTD34V320K
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320
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415
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459
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510
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561
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845
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300
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20
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50
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1060
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EVTD34V385K
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385
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505
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558
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620
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682
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1025
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300
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20
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50
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1250
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EVTD34V420K
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420
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560
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612
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680
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748
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1120
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300
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20
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50
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1250
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EVTD34V460K
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460
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615
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675
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750
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825
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1240
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300
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20
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50
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1280
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EVTD34V510K
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510
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670
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738
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820
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902
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1355
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300
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20
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50
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1395
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EVTD34V550K
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550
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745
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819
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910
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1001
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1500
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300
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20
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50
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1475
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Dimensions
(mm)
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L
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43.9
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W
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42.8
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W1
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41
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T
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16
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F
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25.5
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L1
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17.8
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Note: Tolerance for all
dimensions are +/- 1mm unless otherwise noted. |
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*NOTE: Micro switches are intended for monitoring of the internal thermal disconnect. Micro switches are rated at 125VAC 1A max.
Part Number System
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Series
EVTD = EV Series Varistor TD Thermal Disconnect
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Disk Size
34 = 34mm
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Type
V = High Current EV Varistor Series
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AC RMS Voltage Rating
50 = 50VAC
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Tolerance
K = ±10%
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Microswitch Location Option
Nil = Top and Bottom
A = Top only
B = Bottom only |
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