EVF Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Vitreous Enamel Power

Wirewound
Tubular
Euro-Power
Wirewound Series
Vitreous Enamel Power
Select Euro series fixed resistors for applications
requiring wattage ratings from 72 to 1000 watts.
Suitable for rugged applications, Euro-Power resis-
tors are spot welded producing stronger mechani-
cal and electrical connections. The vitreous enamel
coating was specifically developed and provides
protection against moisture and mechanical damage.
Euro-Power resistors are equipped with lug termi-
nals suitable for soldering or sturdy bolt connection.
Mounting brackets not included with resistors.
F eat u res
• Terminals suitable for soldering or bolt connection
• High wattage applications
• Rugged lead free virtreous enamel coating
• Flame resistant coating
• All-welded construction
• "Live" mounting option
SERIES SPECIFICATIONS
Series Wattage
EVFT119
72
EVFT170 160
EVFT252 280
ESFT375 700
EVRT170 200
EVRT252 350
ESRT375 1000
Ohms
Voltage
0.4Ω-250K 1400
0.5Ω-100K 2100
0.2Ω-125K 3300
0.2Ω-200K 5000
0.10-18Ω
0.22-33Ω
0.33-56Ω
Construction
Round wire
Round wire
Round wire
Round wire
Ribbon wire
Ribbon wire
Ribbon wire
Non-Inductive
versions avail-
able; Other sizes
available; Also
available in low
cost Centohm or
Silicone coating;
Consult Ohmite.
c h aracteristics
Coating Lead free vitreous enamel. Very large models (700 watts and up) are supplied in Silicone Ceramic. Also
available in low-cost Centohm coating; Consult factory.
Core Tubular ceramic.
Terminals solder coated radial lug with RoHS composition solder
Derating Linearly from 100% @ +25°C to 0% @ +350°C.
Tolerance ±5% 1Ω and over (J); ±10% under 1Ω (K)
Power rating Based on 25°C free air rating.
Overload 10 times rated wattage for 5 seconds.
Temperature coefficient 1 to 20Ω: ±400 ppm/°C; Above 20Ω: ±260 ppm/°C; Ribbon wire: 400ppm/°C
Dielectric withstanding voltage 1000 VAC: 72 to 160 watt rating. 3000 VAC: 280 to 700 watt rating (Measured from terminal to mount-
ing bracket)
To calculate max. amps use the formula √P/R
S o l d er ta b D I M E N S I O N S
(mm)
L
D
C
J max.
H ref.
Wattage
Round wire Ribbon wire
L
D
C
H ref.
J max.
Core Code
72
N/A
119
20.3
9.2
14.3
39.4
EM
160
200
170
25.5
12.4
15.9
45.9
EN
280
350
252
30.6
17.5
19.1
54.1
EP
700
1000
375
51.0
27.9
19.1
74.1
ER
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