Ohmite D50 Rugged lead free vitreous enamel coating Datasheet

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 setting 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 ERIE S S P ECI F ICATI O N S
Series
D12
D25
D50
D75
D100
D175
D225
D500
D1000
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
Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite.
characteristics
Adjustability 10% to 90% of full value. Wattage is proportional to this adjusted
resistance value.
Coating Lead free vitreous enamel. Large models (500 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. RoHS solder composition is 96% Sn,
3.5% Ag, 0.5% Cu
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.
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.
Power limitations for high resistance 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 necessary for ratings
12W
4,500Ω
higher than
25W
9,000Ω
100W.
50W
20,000Ω
75W
100W
Temperature ±260 ppm/°C
coefficient
Dielectric 1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 and 225 watt ratwithstanding ing (measured from terminal to mounting bracket)
voltage
Max. amps To calculate, use the formula √P/R.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected]
109
35,000Ω
50,000Ω
210 Series
Dividohm® Vitreous Enamel
Adjustable Power
d i m e ns i ons
(in. / mm)
Series
Wattage
L
D
C
Core Code
Standard Terminal
D12
12
1.75 / 44.4
0.313 / 7.94
0.188 / 4.76
D
57
D50
50
4.0 / 101.6
0.562 / 14.3
0.313 / 7.94
K
40
D25
D
C
25
D75
D100
L
D175
D225
D500
D1000
2.0 / 50.8
75
0.562 / 14.3
6.0 / 152.4
100
0.562 / 14.3
6.5 / 165.1
175
0.750 / 19.1
8.5 / 215.9
225
500
1.125 / 28.6
10.5 / 266.7
1.125 / 28.6
20.0 / 508.0
2.50 / 63.5
12.0 / 304.8
1000
2.50 / 63.5
0.313 / 7.94
K
0.313 / 7.94
40
K
0.50 / 12.7
40
M
0.75 / 19.1
40
P
0.75 / 19.1
1.75 / 44.5
46
P
46
S
45
S
1.75 / 44.5
45
o r d e r i n g i nfo r m a t i on
Made-to-order Parts
Coating
Blank = Vitreous
C = Centohm
S = Silicone
RoHS Compliant
Series Wattage Tolerance
J = 5%
K = 10%
Core Diameter
See “Core and
Terminal Selection”
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
Terminal Type
See “Resistor Terminals
for Tubular Cores”
Wattage
Coating
210 = Vitreous
410 = Silicone Ceramic
610 = Centohm
RoHS Compliant
See 270 series custom core
and terminal info
Tolerance
J = 5%
K = 10%
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω



 = Standard values; check availability at
www.ohmite.com
110
–––150E
–––200E
–––250E
–––300E
–––400E
–––500E
–––750E
–––800E
–––1K0E
–––1K25E
–––1K5E
–––2K0E
–––2K5E






 

  


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
  

     

 
  
     
 
  
 
 
  
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 • [email protected]
D225K––– 225
D175K––– 175
D100K––– 100
D75K––– 75
D25K––– 25
D50K––– 50
Part No.
Prefix 
Suffix
–––3K0E
–––4K0E
–––5K0E
–––6K0E
–––7K0E
–––7K5E
–––10KE
–––12KE
–––15KE
–––20KE
–––25KE
–––50KE
–––100KE
D12K––– 12
Ohmic value
D1000K–––1000
D500K––– 500
D225K––– 225
D100K––– 100
D175K––– 175
 
  
    
  
  
    
  
 
    

    
  
   
D75K––– 75







D50K––– 50
D25K––– 25

150
200
250
300
400
500
750
800
1,000
1,250
1,500
2,000
2,500
D12K––– 12




  
Ohmic value
D500K––– 500
D225K––– 225
D175K––– 175
D100K––– 100
75
D75K–––
50
25
D25K–––
D50K–––
12
D12K–––
     
     
    
  
     
 
     
  
 
     
     
  
     
Part No.
Prefix 
Suffix
Wattage


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

Ohmic value
Wattage
D1000K–––1000
Standard Values
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