81NF4R99 datasheet, PDF - EEWORLD Datasheet

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81NF4R99: DescriptionFixed Resistor, Wire Wound, 1W, 4.99ohm, 150V, 1% +/-Tol, -50,50ppm/Cel,; CategoryPassive components The resistor; File Size323KB，2 Pages; ManufacturerOhmite; Websitehttps://www.ohmite.com

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81NF4R99 Overview

Fixed Resistor, Wire Wound, 1W, 4.99ohm, 150V, 1% +/-Tol, -50,50ppm/Cel,

81NF4R99 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Objectid	847912084
Reach Compliance Code	compliant
Country Of Origin	Mexico
ECCN code	EAR99
YTEOL	7.2
structure	All-Welded
Lead diameter	0.51 mm
Lead length	38.1 mm
Number of terminals	2
Package diameter	3.2 mm
Package length	11.1 mm
Package form	Axial
Rated power dissipation(P)	1 W
resistance	4.99 Ω
Resistor type	FIXED RESISTOR
series	80
technology	WIRE WOUND
Temperature Coefficient	-50,50 ppm/°C
Tolerance	1%
Operating Voltage	150 V

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Commercial Grade Acrasil

‚ Silicone-Ceramic

Conformal Axial Terminal Wirewound

1% Tolerance (5% available)

80 series

rW series

F e at u r e s

Military Grade 80 Series MIL-R-26 Qualified

Ohmite’s highest quality conformal axial terminal

silicone-ceramic coated resistors for applications

requiring high precision and stability. These resistors

have a low temperature coefficient and maintain a

high degree of stability under demanding conditions.

• Designed for precision power applications

• All-welded construction

• RW Series “Mil” value resistors marked with

“Mil” in accordance with MIL-R-26 specifica-

tions

s e r i e s s p e C i F i C at i o n s

Commercial Grade

81F

83F

83J

85F

85J

80F

80J

Military Grade

RW70U

RW79U

RW69V

RW74U

RW67V

RW78U

RW68V

Watts

Ohms

0.1-6K

0.1-8K

0.1-20K

0.1-75K

0.1-150K

Voltage

150

100

200

460

1000

Non-Inductive versions available. Insert “N” before tolerance code. Example: 83NF2K21

CharaCteristiCs

Coating

Silicone-ceramic

Core

Ceramic

Terminals

Solder-coated copper clad axial

Derating

Linearly from 100% @ +25°C to 0% @ +275°C.

Tolerance

±5% (J type), ±1% (F type) (other tolerances available)

Power rating

Based on 25°C free air rating

Maximum ohmic values

See chart

Overload

Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times

rated wattage for 5 seconds

Temperature coefficient

Under 1Ω; ±90 ppm/°C

1 to 9.99Ω: ±50 ppm/°C

10Ω and over; ±20 ppm/°C

Dielectric withstanding voltage

500 VAC: 1 watt rating; 1000 VAC: 2, 3, 5, 7, and 10 watt rating

Dimensions

(in./mm max.)

Watts

Length

0.406 / 10.3

0.437 / 11.1

Diam.

0.219 / 5.6

0.125 / 3.2

Lead gauge

81F

RW70U

RW79U

RW69V

1.5 in. /

38.1mm

min.

85F

85J

80F

80J

83F

83J

0.593 / 15.1

0.937 / 23.8

1.842 / 46.8

0.218 / 5.5

0.343 / 8.7

0.406 /10.3

RW74U

RW67V

RW78U

RW68V

(continued)

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

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