Ohmite Mfg. Co.

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33

Metalohm Series

Cold Rolled Steel Encased Wirewound

Heatsinkable Radial Terminal

0.5"

A

B

C

ø0.195"

D

0.75"

term. style 276 (sq. collar, G3923)

278 (oval collar, G3860)

1.5" max.

0.250"

ø0.068"

±0.005

term. style 277

1.5" max.

term. style 279

0.437" dia.

ø0.089"

1" max.

term. style 211

term. style 252

1.25" max.

ø0.171"

term. style 297

1.25" max.

term. style 298

wire

wire

F E a T u R E S

• Flameproof and inorganic

• Higher power rating due to heat

sink capacity

• All welded construction

• Nonhygroscopic

• High surge construction

S p EC i F i C a T ion S

Electrical

Wattage: Based on a 275°C “U”

characteristic derating curve

Temperature coefficient:

≥18 ohm: 0 ±90ppm/°C

8 < 18 ohm: 0 ±50ppm/°C

<8 ohm: 0 ±180ppm/°C

(TC for some watt/ohm combina-

tions may be lower)

Dielectric strength: Terminal to

case, depends on terminal style

(1500V min.)

Creepage:

term. style 277: 1.2”

term. style 278: 0.4”

term. style 276: 0.7”

term. styles 211/252/279: 0.15”

Termination Wires

• Stranded, available in any insu-

lation rated 125°C or higher

(may require term. style 297).

• Custom cut/stripped lengths

• Can be potted or pre-soldered to

terminal styles 211 or 252

• Quick connect (fully or partially

insulated), ring or spade termina-

tions available

Dielectric Sleeves

• Steatite construction

• Style 276 meets UL/NEMA

2500V RMS for one minute

requirement

• Available as terminal styles 276,

277, 278, 297

Watts

Dimensions (inches)

Style

w/o heat sink w/ heat sink* a

B

C

D

ohmic range**

20/45M

20

45

1

0.05-6K

40/70M

40

70

3

1.0-25K

HV40-70M

40

70

3

1.0-25K

50/100M

50

100

1.5-47.5K

60/115M

60

115

6

2.5-81K

85/150M

85

150

8

4.5-100K

**Standard winding ranges only listed, other values available; contact Ohmite.

D i E l E C T R i C S T R E n g T H

Terminal Type 211

252, 279

276

278

277

297

298

Style

Dielectric Strength

20/45M

1500

N/A

N/A

N/A

N/A

2500V

2500V

40/70M

1500

1500

2500

2500

N/A

2500V

2500V

HV40/70M

N/A

N/A

N/A

N/A

4250

N/A

N/A

50/100M

1500

1500

2500

2500

N/A

2500V

2500V

60/115M

1500

1500

2500

2500

N/A

2500V

2500V

85/150M

1500

1500

2500

2500

N/A

2500V

2500V

o p T ion S

• 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

ordering informa tion

Style

Ohms

00R05 = 0.05

00R50 = 0.50

1R000 = 1.00

1K000 = 1,000

10K50 = 10,500

Terminal Type

A = 211

B = 252

C = 279

D = 276

Non-inductive

(optional)

Tolerance

K = 10%

J = 5%

RoHS Compliant

E = 277

F = 278

G = 297

H = 298

Check product availability at

www.ohmite.com

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