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PDFs and Datasheets Metalohm Series Datasheet

METALOHM SERIES DATASHEET

Cold Rolled Steel Encased Wirewound
Heatsinkable Radial Terminal

Metalohm series product image

Features

  • Flameproof and inorganic
  • Higher power rating due to heat sink capacity
  • All welded construction
  • Nonhygroscopic
  • High surge construction

Options

  • 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

Specifications

Watts w/o heat sink:

20

Watts w/ heat sink*:

45

Ohmic range**:

0.05-6K

Watts w/o heat sink:

40

Watts w/ heat sink*:

70

Ohmic range**:

1.0-25K

Watts w/o heat sink:

40

Watts w/ heat sink*:

70

Ohmic range**:

1.0-25K

Watts w/o heat sink:

50

Watts w/ heat sink*:

100

Ohmic range**:

1.5-47.5K

Watts w/o heat sink:

60

Watts w/ heat sink*:

115

Ohmic range**:

2.5-81K

Watts w/o heat sink:

85

Watts w/ heat sink*:

150

Ohmic range**:

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

Based on a 275°C “U” characteristic derating curve

≥18 ohm: 0 ±90ppm/°C 8 less than 18 ohm: 0 ±50ppm/°C less than 8 ohm: 0 ±180ppm/°C (TC for some watt/ohm combinations may be lower)

Terminal to case, depends on terminal style (1500V min.)

term. style 277: 1.2” term. style 278: 0.4” term. style 276: 0.7” term. styles 211/252/279: 0.15”

• Stranded, available in any insulation rated 125°C 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

• Steatite construction • Style 276 meets UL/NEMA 2500V RMS for one minute requirement • Available as terminal styles 276, 277, 278, 297

Dielectric Strength/Terminal Availability

Terminal Types for Dielectric Strength: 211 252, 279 276 278 277 297 298

211:1500

252, 279:N/A

276:N/A

278:N/A

277:N/A

297:2500V

298:2500V

211:1500

252, 279:1500

276:2500

278:2500

277:N/A

297:2500V

298:2500V

211:N/A

252, 279:N/A

276:N/A

278:N/A

277:4250

297:N/A

298:N/A

211:1500

252, 279:1500

276:2500

278:2500

277:N/A

297:2500V

298:2500V

211:1500

252, 279:1500

276:2500

278:2500

277:N/A

297:2500V

298:2500V

211:1500

252, 279:1500

276:2500

278:2500

277:N/A

297:2500V

298:2500V

Dimensions

Dimensions for Metalohm

A:1

B:1 7/16

C:1 7/8

D:3/4

A:2 9/16

B:3

C:3 7/16

D:3/4

A:2 9/16

B:3

C:3 7/16

D:7/8

A:3 11/16

B:4 1/8

C:4 9/16

D:3/4

A:5 9/16

B:6

C:6 7/16

D:3/4

A:7 1/2

B:8

C:8 1/2

D:3/4

Ordering Information

Not all terminal types available for all Metalohm sizes.

Ordering chart

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