Metalohm Series

Metalohm Series
Cold Rolled Steel Encased Wirewound
Heatsinkable Radial Terminal
F e at u r e s
Options
•Flameproof and inorganic
•Higher power rating due to
heat sink capacity
•All welded construction
•Nonhygroscopic
•High surge construction
•Noninductive versions (Aryton-Perry windings)
•Terminal sleeves to increase dielectric strength
and maximize creepage distance
•Variety of terminal choices
•Potted or soldered wire terminals including
quick connect, ring, spade terminals
•Tapped models
SERIES SPECI F ICATI O NS
Style
Watts w/o heat sink Watts w/ heat sink*
20/45M
20
45
40/70M
40
70
HV40-70M
40
70
50/100M
50
100
60/115M
60
115
85/150M
85
150
Ohmic range**
0.05-6K
1.0-25K
1.0-25K
1.5-47.5K
2.5-81K
4.5-100K
*Based on a 12”x12”x0.125” aluminum heat sink, using a thermal compound, in a 25°C ambient
**Standard winding ranges only listed, other values available; contact Ohmite.
characteristics
Wattage Based on a 275°C “U” characteristic derating curve
Temperature ≥18 ohm: 0 ±90ppm/°C
coefficient 8 < 18 ohm: 0 ±50ppm/°C
<8 ohm: 0 ±180ppm/°C
(TC for some watt/ohm combinations may be lower)
Dielectric Terminal to case, depends on terminal style (1500V
strength min.)
Creepage term. style 277: 1.2”
term. style 278: 0.4”
term. style 276: 0.7”
term. styles 211/252/279: 0.15”
Dielectric Strength/Terminal Availability
Terminal Type
211
252, 279
276
278
277
297
298
StyleDielectric Strength
20/45M
40/70M
HV40/70M
50/100M
60/115M
85/150M
1500
N/A
N/A
N/A
N/A
N/A
4250
2500
N/A
1500
1500
2500
2500
1500
1500
2500
2500
2500
2500
N/A
1500
1500
N/A
1500
1500
N/A
2500
N/A
2500V 2500V
2500V 2500V
N/A
N/A
N/A
2500V 2500V
N/A
2500V 2500V
2500V 2500V
Termination • Stranded, available in any insulation rated 125°C
Wires or higher (may require term. style 297).
• 12" standard length for term. 297 & 298 (custom
lengths available)
• Can be potted or pre-soldered to terminal styles
211 or 252
• Quick connect (fully or partially insulated), ring or
spade terminations available
Dielectric • Steatite construction
Sleeves • Style 276 meets UL/NEMA 2500V RMS for one
minute requirement
• Available as terminal styles 276, 277, 278, 297
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected]
135
Metalohm Series
Cold Rolled Steel Encased Wirewound
Heatsinkable Radial Terminal
dimensions
(in.)
term. style 277
0.250"
term. style 276 (sq. collar, G3923)
278 (oval collar, G3860)
C
B
A
ø0.195"
ø0.068"
±0.005
term. style 279
1.5" max.
ø0.171"
1" max.
term. style 297
0.437" dia.
wire
C
17/8
37/16
37/16
49/16
67/16
81/2
D
3/4
3/4
7/8
3/4
3/4
3/4
o r d e r i n g i n fo r m a t i o n
Not all terminal types available for all Metalohm sizes
RoHS Compliant
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Non-inductive Tolerance
(optional) K = 10%
J = 5%
Ohms
00R05 = 0.05
00R50 = 0.50
1R000 = 1.00
1K000 = 1,000
10K50 = 10,500
term. style 298
wire
1.25" max.
Style
A
B
20/45M
1
17/16
40/70M
29/16
3
HV40-70M 29/16
3
50/100M 311/16 41/8
60/115M 59/16
6
85/150M 71/2
8
5/16"
term. style 211
ø0.089"
0.75"
136
max.
term. style 252
0.5" D
Style
23/16"
Terminal Type
A = 211 E = 277
B = 252 F = 278
C = 279 G = 297
D = 276 H = 298
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected]
1.25" max.
1.5" max.