Standard part numbers and availability Made-to-Order Part Numbers Download Datasheet (PDF) Ohm's Law Calculator

270 Series

Series	Wattage	Ohms	Dimensions (in. / mm)			Core Code	Max. Voltage*	Std. Terminal	Mounting Hardware
			Length L	Diam. D	I. D. Core C
L12	12	0.1-51K	1.75 / 44.4	0.313 / 7.94	0.188 / 4.76	D	565	57	Click Here
L25	25	0.15-100K	2.0 / 50.8	0.562 / 14.3	0.313 / 7.94	K	625	40	Click Here
L50	50	0.38-260K	4.0 / 101.6	0.562 / 14.3	0.313 / 7.94	K	1625	40	Click Here
L100	100	0.23-101K	6.5 / 165.1	0.750 / 19.1	0.50 / 12.7	M	2845	40	Click Here
L175	175	0.13-101K	8.5 / 215.9	1.125 / 28.6	0.75 / 19.1	P	3595	46	Click Here
L225	225	0.16-129K	10.5 / 266.7	1.125 / 28.6	0.75 / 19.1	P	4595	46	Click Here
L500	500	0.38-218K	12.0 / 304.8	2.50 / 63.5	1.75 / 44.5	S	4970	45	Click Here
L1000	1000	0.69-392K	20.0 / 508.0	2.50 / 63.5	1.75 / 44.5	S	8900	45	Click Here

Non-Inductive versions available.
Other sizes available; Consult factory.
Also available in low-cost Centohm coating; Consult factory.
* Maximum Voltage is based on Ohm's Law [V=] as limited by the resistance value of specified product

RoHS compliant product available Jan. 2006 Add "E" suffix to part number to specify.

Select 270 Type fixed resistors for applications requiring wattage ratings from 12 to 1000 watts. The 270 Type resistors are equipped with lug terminals 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 (more mounting info).

FEATURES Terminals suitable for soldering or bolt connection High wattage applications Rugged lead free vitreous enamel coating Flame resistant coating All-welded construction "Fast on" option – see terminal 538 SPECIFICATIONS Material Coating: Lead free vitreous enamel. 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. Electrical Tolerance: ±5% 1 ohm and over (J); ±10% under 1 ohm.(K) Power rating: Based on 25°C free air rating. Overload: 10 times rated wattage for 5 seconds. Temperature coefficient: 1 to 20 ohms: ±400 ppm/°C. Above 20 ohms: ±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) To calculate max. amps: use the formula Power limitations for high resistance values: When resistance exceeds the resistance values listed at right, derate the Power Rating by 25% to improve reliability: Power rating Resistance value 12W 3,900 ohms 25W 12,000 ohms 50W 35,000 ohms 100W 75,000 ohms No power derating necessary for ratings higher than 100 watts. Mounting hardware info Core and Terminal Selection for Made to Order Tubular Resistors Through-Bolt "Dead" Mounting Brackets (PDF)

Standard part numbers and availability