Ribbon wound on edge mounted on ceramic brackets or ceramic support fixed on a metallic bar or a metallic tie rod. These resistors are recommended for very high energy pulses and low ohmic values.

Protection Degree IP00

Dynamic braking, Starting motor, Crowbar

Railways, Industrial automation, Energy

Ohmic values out of range, Special tolerance on resistance (2%, 1%), Intermediate grip

Available: CuNi44, Nickel Chrome Alloys, Stainless steel


The resistor is marked on the terminals
FAIRFILD – WW/YY (week / year)–
Model – Rated power – Resistance – Tolerance – Rated Voltage


In case of group mounting keep a distance of at least 60 mm between consecutive resistors.


The resistor is packed in a way to preserve incidental damages due to transport. The resistor is made by ceramic parts, accidental fall can damage it, handle with care.


Every effort has been made to ensure that the information in this datasheet is accurate. Fairfild is not responsible for printing or clerical errors. All properties and characteristics mentioned in this datasheet are only for informational purposes. The information in this datasheet is offered solely for your consideration and should not be taken as a warranty or representation for which we assume legal responsibility. The customer bears all responsibility for use and application of Fairfild products. There is no responsibility of the manufacturer for any damage to persons and properties in case of improper use. Fairfild reserves the right to change specifications without prior notice.


This datasheet is subject to copyright. Fairfild reserves all rights of translation in any language, reprinting, re-use of illustrations.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, without the written permission of the copyrighted owner Fairfild, Italy. Violations may be subject to legal proceedings involving monetary damages as well as compensation for costs and legal fees under Italian copyright law and regulation within the European Union.

Ordering information

In the order must be specified:
Type: RNT or RNP
Model: for RNP 800/1000/1200,
for RNT 2, 3, 4, 5, 6 or 700/900/1000/1100
Ohmic value at room temperature
Requested tolerance on ohmic value (standard ±10%)

RNP 800 1R5 10%
RNP is the name of the product
800 is the model
1R5 means 1,5 Ω that is the nominal ohmic value at 20°C
10% is the tolerance on the ohmic value, in this case the value of the resistor is accepted when is within 1.35 Ω ÷ 1.65 Ω

Standard tolerance on ohmic value is ±10%.