210 Series
Dividohm® Vitreous Enamel
Adjustable Power
F e at u r e S
• Terminals suitable for soldering or bolt connection.
• Adjustable lug supplied
• High wattage applications
• All-welded construction
• Rugged lead free vitreous enamel coating.
• Flame resistant coating
• Additional adjustable lugs available
• RoHS compliant product available. Add “E” suffix to
part number to specify
Choose Ohmite’s 210 Type adjustable resistors for
applications requiring settings at different resistance
values. These wirewound resistors are equipped with
an adjustable lug, making them ideal for adjusting
circuits, obtaining odd resistance values and set-
ting equip ment to meet various line voltages. 210
Type resistors feature a hollow core to permit secure
fastening with spring-type clips or thru bolts with
washers. They also offer the durability of lead free
vitreous enamel coating and all-welded construction.
Mounting brackets not included with resistors.
S e r i e S S P e c i F i c at i O N S
Series
D12
D25
D50
D75
D100
D175
D225
D500
D1000
Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.
Wattage
12
25
50
75
100
175
225
500
1000
Ohms
1.0-10K
1.0-25K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
1.0-100K
1.5-15K
3.0-27.7K
Core Code
D
K
K
K
M
P
P
S
S
Voltage
565
625
1625
2625
2845
3595
4595
4970
8900
Standard Terminal
57
40
40
40
40
46
46
45
45
characteriSticS
Adjustability
10% to 90% of full value. Wattage is proportional to this adjusted
resistance value.
Coating
Lead free vitreous enamel.
Terminals
Solder coated radial lug. RoHS solder composition is 96% Sn,
3.5% Ag, 0.5% Cu
Core
Tubular ceramic.
Tolerance
±10% (K)
Power rating
Based on 25°C free air rating. The stated wattage rating applies
only when the entire resistance is in the circuit. Setting the lug at
an intermediate point reduces the wattage rating by approximately
the same proportion. Example: If the lug is set at half resistance,
the wattage is reduced by approx. one-half.
Overload
10 times rated wattage for 5 seconds.
Temperature
±260 ppm/°C
coefficient
Adjustable
Nickel plated steel. (Screwdriver type adjustable lug supplied
terminal
standard. Other types, including silver contact units, available.)
Derating
Linearly from 100% @ +25°C to 0% @ +350°C.
Power limitations for high resis-
tance values:
When resistance
exceeds the resistance values listed
below, derate the Power Rating by
25% to improve reliability:
Power Resistance
No power
rating value
derating neces-
sary for ratings
12W
4,500Ω
higher than
25W
9,000Ω
100W.
50W
20,000Ω
75W
100W
35,000Ω
50,000Ω
Dielectric
1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 and 225 watt rat-
withstanding
ing (measured from terminal to mounting bracket)
voltage
Max. amps
To calculate, use the formula √P/R.
108
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
210 Series
Dividohm® Vitreous Enamel
Adjustable Power
(in. /
mm)
dimeNSiONS
Series
D12
D25
D50
D75
Wattage
12
25
L
1.75 / 44.4
2.0 / 50.8
4.0 / 101.6
D
0.313 / 7.94
0.562 / 14.3
0.562 / 14.3
0.562 / 14.3
C
0.188 / 4.76
0.313 / 7.94
0.313 / 7.94
0.313 / 7.94
Core Code
D
K
K
Standard Terminal
57
40
40
40
40
D
L
C
50
D100
75
D500
D225
D175
100
6.0 / 152.4
D1000
500
225
175
6.5 / 165.1
1000
12.0 / 304.8
20.0 / 508.0
10.5 / 266.7
8.5 / 215.9
0.750 / 19.1
1.125 / 28.6
2.50 / 63.5
0.50 / 12.7
0.75 / 19.1
0.75 / 19.1
M
P
P
K
1.125 / 28.6
2.50 / 63.5
1.75 / 44.5
1.75 / 44.5
S
46
45
46
S
45
O r d e r i N g i N F O r m at i O N
Coating
Blank = Vitreous
C = Centohm
S = Silicone
Made-to-order Parts
RoHS Compliant
Core Diameter
See “Core and
Terminal Selection”
Terminal Type
See “Resistor Terminals
for Tubular Cores”
RoHS Compliant
Series Wattage Tolerance
J = 5%
K = 10%
Ohms
1R0 =
1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
Wattage
Coating
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
Ohms
R500 = 0.500Ω
1R00 =
1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
Tolerance
J = 5%
K = 10%
See 270 series custom core
and terminal info
Standard Values
D1000K–––1000
D1000K–––1000
Wattage
D100K–––
100
D225K–––
225
D175K–––
175
D500K–––
500
12
25
50
75
Ohmic value
Part No.
Prefix
Suffix
1.0
–––1R0E
2
–––2R0E
3
–––3R0E
4
–––4R0E
5
–––5R0E
7.5
–––7R5E
10
–––10RE
15
–––15RE
20
–––20RE
25
–––25RE
50
–––50RE
75
–––75RE
100
–––100E
Wattage
D100K–––
100
D500K–––
500
D175K–––
175
D225K–––
225
D25K–––
25
D12K–––
12
D50K–––
50
D75K–––
75
Ohmic value
Part No.
Prefix
Suffix
–––150E
–––200E
–––250E
–––300E
–––400E
–––500E
–––750E
–––800E
–––1K0E
–––1K25E
–––1K5E
–––2K0E
–––2K5E
Wattage
D100K–––
100
Ohmic value
Part No.
Prefix
Suffix
–––3K0E
–––4K0E
–––5K0E
–––6K0E
–––7K0E
–––7K5E
–––10KE
–––12KE
–––15KE
–––20KE
–––25KE
–––50KE
–––100KE
D175K–––
175
D12K–––
12
D50K–––
50
D225K–––
225
D25K–––
25
D75K–––
75
D12K–––
D25K–––
D50K–––
D75K–––
150
200
250
300
400
500
750
800
1,000
1,250
1,500
2,000
2,500
3,000
4,000
5,000
6,000
7,000
7,500
10,000
12,000
15,000
20,000
25,000
50,000
100,000
=
tandard values; check availability at
S
www.ohmite.com
50KΩ and 100KΩ resistance values involve very fine resistance wire and should not be
used in critical applications without burn-in and/or thermal cycling.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
109
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