1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 113
270 Series
Vitreous Enamel Power
Series Wattage Ohms Core Code Voltage Std. Terminal
L12 12 0.1-51K D 565 57
L25 25 0.15-100K K 625 40
L50 50 0.38-260K K 1625 40
L100 100 0.23-101K M 2845 40
L175 175 0.13-101K P 3595 46
L225 225 0.16-129K P 4595 46
L500 500 0.38-218K S 4970 45
L1000 1000 0.69-392K S 8900 45
Non-Inductive versions available;
Other sizes available; Also available in
low cost Centohm or Silicone coating;
Consult Ohmite.
* Maximum Voltage is based on
Ohm’s Law [V=√P*R] as limited by the
resistance value of specified product
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
Derating Linearly from 100% @ +25°C to 0% @ +350°C.
Tolerance ±5% 1Ω and over (J); ±10% under 1Ω (K)
Power rating Based on 25°C free air rating.
Overload 10 times rated wattage for 5 seconds.
Temperature coefficient 1 to 20Ω: ±400 ppm/°C; Above 20Ω: ±260 ppm/°C
Dielectric withstanding voltage 1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 to 225 watt rating (Measured from terminal to
mounting bracket)
Max. amps use the formula √P/R
Power limitations for
high resistance values
When resistance exceeds the resistance values listed, derate the Power Rating by 25% to
improve reliability. No power derating necessary for ratings higher than 100W.
Power Resistance
rating value
12W 3,900Ω
25W 12,000Ω
50W 35,000Ω
100W 75,000Ω
Mounting Hardware see http://www.ohmite.com/techdata/lug-mounting.php
Select 270 Type fixed resistors for applications
requiring wattage ratings from 12 to 1000 watts.
The 270 Type resistors are equipped with lug termi-
nals suitable for soldering or sturdy bolt connection.
When secure mounting is required, the hollow core
of these resistors permit fastening with spring-type
brackets, thru bolts or thru bolts with slotted-steel
brackets.
Suitable for rugged applications, the 270 Type
resistors feature all-welded construction and durable
lead free vitreous enamel coating. Mounting brackets
not included with resistors.
FEATURES
•Terminalssuitableforsoldering
or bolt connection
•Highwattageapplications
•Ruggedleadfreevitreousenamelcoating
•Flameresistantcoating
•All-weldedconstruction
•RoHScompliantavailable
•“Faston”option–seeterminal538,
http://www.ohmite.com/techdata/terminals.pdf
SERIES SPECIFICATIONS
CHARACTERISTICS
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
114
Standard part numbers for 270 series
= Standard values; check availability using the worldwide
inventory search at www.ohmite.com
RedoutlinedvaluessuppliedinSilicone-Ceramiccoatings
instead of vitreous enamel.
0.51  L12JKR51E
1  L12J1R0E
3.3  L12J3R3E
4.7  L12J4R7E
10  L12J10RE
12  L12J12RE
15 L12J15RE
22  L12J22RE
27  L12J27RE
33  L12J33RE
47  L12J47RE
68  L12J68RE
82  L12J82RE
100  L12J100E
150  L12J150E
1–––1R0E     
2–––2R0E    
3–––3R0E  
4 –––4R0E 
5–––5R0E     
10–––10RE     
15–––15RE  
25–––25RE     
50–––50RE     
75–––75RE  
100–––100E     
125 –––125E
150 –––150E    
200 –––200E 
250 –––250E    
500 –––500E    
750 –––750E 
800 –––800E 
1,000–––1K0E     
1,500 –––1K5E 
2,000–––2K0E   
180  L12J180E
270  L12J270E
330  L12J330E
390  L12J390E
470  L12J470E
560  L12J560E
1000  L12J1K0E
1200  L12J1K2E
1500  L12J1K5E
2200  L12J2K2E
2700  L12J2K7E
4700  L12J4K7E
10000  L12J10KE
18000  L12J18KE
22000  L12J22KE
51000  L12J51KE
2,500 –––2K5E 
3,000 –––3K0E 
3,500–––3K5E  
4,000 –––4K0E 
5,000–––5K0E  
6,000 –––6K0E 
7,500 –––7K5E 
10,000 –––10KE 
12,000 –––12KE 
15,000 –––15KE 
20,000 –––20KE 
25,000 –––25KE 
30,000 –––30KE

35,000 –––35KE
40,000 –––40KE 
50,000 –––50KE   
60,000 –––60KE 
75,000 –––75KE 
100,000 –––100KE   
150,000 –––150KE 
200,000 –––200KE
250,000 –––250KE
Ohmic
value 12 Watt
Ohmic
value 12 Watt
Ohmic value
L25J––– 25
L50J––– 50
L100J––– 100
L175J––– 175
Wattage
Part No.
Prefix
Suffix
L225J––– 225
L500J––– 500
L1000J–––1000
Ohmic value
L25J––– 25
L50J––– 50
L100J––– 100
L175J––– 175
Wattage
Part No.
Prefix
Suffix
L225J––– 225
L500J––– 500
L1000J–––1000
Tolerance
J= 5%
K= 10%
Core Diameter
See “Core and
Terminal Selection”
Ohms
R500 = 0.500Ω
1R00 = 1Ω
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
RoHS Compliant
Coating
270 = Vitreous
470 = Silicone Ceramic
Wattage
Terminal Type
See “Resistor Terminals
for Tubular Cores”
Non-inductive
Blank =Standard
N=Non-inductive
L25J100E
Tolerance
J= 5%
K= 10%
Ohms
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
25K = 25,000Ω
25K5 = 25,500Ω
RoHS
Compliant
WattageSeries
Coating
Blank =Vitreous
C=Centohm
S=Silicone
Non-inductive
Blank =Standard
N=Non-inductive
F = Fast on
(optional)
See website for
custom core and
terminal info
L
DC
Series Wattage L D C Core Code* Std. Term.**
L12 12 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 57
L25 25 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 40
L50 50 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 40
L100 100 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 40
L175 175 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 46
L225 225 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 46
L500 500 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 45
L1000 1000 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 45
* http://www.ohmite.com/techdata/200-210-270-custom.pdf
** http://www.ohmite.com/techdata/terminals.pdf
DIMENSIONS
in./mm
ORDERING INFORMATION
270 Series
Vitreous Enamel Power
Standard Made-to-order
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Ohmite:
L12J51K L25J40K L50J75R L50J10R L12J10K L12J18K L175J40K L100J750 L100J2K0 L100J1K0 L100J3K0
L100J4R0 L100J5K0 L50J175K L12J8K2 L50J75K L175J250 L50J1R0 L225J2R0 L50J100 L225J250 L25J35K
L25J30K L50J200K L12J2K2 L12J470 L50J750 L100J2K5 L175J2K5 L50J5R0 L50J500 L225J2K0 L225J3K0
L100J150 L100J125 L100J1R0 L225J5K0 L100J100 L175J75K L225J75K L100J75R L100J25R L225J500
L175J500 L225J5R0 L50J20K L175J2K0 L50J25K L225J150 L175J150 L50J4R0 L12J82R L12J47R L12J56R
L12J12R L12J15R L12J39R L12J18R L12J68R L12J10R L12J33R L12J22R L175J20K L100J5R0 L100J500
L225J20K L12J180 L12J150 L12J120 L12J100 L12J1R5 L25J50R L25J2R0 L12J390 L25J200 L25J15R
L25J10R L12J330 L25J75R L12J2K7 L25J2K5 L25J50K L12J820 L50J2K5 L25J3R0 L175J60K L225J1K0
L225J60K L175J30K L225J30K L25J800 L50J3K0 L50J1K0 L25J4R0 L225J7K5 L100J1K5 L50J150 L175J1K5
L12J4R7 L25J12K