LFR-21.87OHM1% datasheet, PDF - EEWORLD Datasheet

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LFR-21.87OHM1%: DescriptionFixed Resistor - Fusible, 2W, 1.87ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4; CategoryPassive components The resistor; File Size30KB，1 Pages; ManufacturerTT Electronics plc; Websitehttp://www.ttelectronics.com/

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LFR-21.87OHM1% Overview

Fixed Resistor - Fusible, 2W, 1.87ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4

LFR-21.87OHM1% Parametric

Parameter Name	Attribute value
Objectid	1893717911
package instruction	RADIAL LEADED-4
Reach Compliance Code	unknown
ECCN code	EAR99
Other features	FLAME PROOF
fuse time	1000 s
Installation features	THROUGH HOLE MOUNT
Number of terminals	2
Package shape	RECTANGULAR PACKAGE
Rated power dissipation(P)	2 W
resistance	1.87 Ω
Resistor type	FIXED RESISTOR - FUSIBLE
surface mount	NO
Temperature Coefficient	50 ppm/°C
Terminal shape	WIRE
Tolerance	1%

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ISO-9001

Registered

TELECOMMUNICATIONS

LINE FEED RESISTORS

LFR-2

SERIES

•

Withstands lightning surges

Opens safely under power cross

Flameproof inorganic construction

Auto-insertable, small size

Meets FCC, EIA and UL requirements

ALFR-2

SERIES

•

Meets all test and specifications

of TR-1089 & UL-1459

•

5.1 ohm to 100 ohm range

•

1% tolerance

•

Meets GR-1089 lightning surge

•

Meets GR-1089 power cross

•

UL-497A approved

DESIGN &

CONSTRUCTION:

The Line Feed Resistor is a

tight tolerance, stable resistor

which has the additional

capability to withstand both in

rush currents and certain

lightning pulse surges but

would fuse safely when

exposed to overload

conditions such as 600 volt

power line crosses.

Made in Barbados

SPECIFICATIONS:

Characteristics

Wattage

Temperature Coefficient

Tolerance

Load Life (1000 hrs.)

Temperature Cycling

Short Time Overload (5 x RW for 10 sec.)

Moisture Load

Resistance Range

Lightning Surge (1000 V-10/1000 µsec)

25 negative & 25 positive surges (2 minute intervals)

Limits - LFR-2/ALFR-2

2 watts

50 ppm/°C

1% and 5%

∆R

maximum

∆R

maximum

∆R

maximum

∆R

maximum

1 to 1600 ohms

∆R

maximum

•

The standard ALFR-2 contains a 128°C thermal fuse. For faster fusing

characteristics 110°C fuse is available.

DIMENSIONS

(Inches):

The four (4)

terminal leads shall

be in the line to a

tolerance to ±0.015

inch. The lead

spacing dimensions

as specified, shall

be measures from

the tip of the lead to

the tip of the lead.

The leads may

have a 15° draft

relative to the

protector body.

TYPICAL FUSING CURVE:

FUSING TIME vs. FUSING POWER

1.045±0.020

0.030 Meniscus

Permitted

.450±.020

.125±.020

.150±.020

0.025

Typ.

.700±.015

0.070 Typ.

.900±.015

TIME TO FUSE

POWER DISSIPATION

HOW TO ORDER:

Sample Part No.:

LFR-2 100Ω 1%

Ω

.100±.015

In circuit applica-

tions terminal leads

1 and 2 shall be

connected together

externally and leads

3 and 4 used for

connection of the

.265±.020

device. For proper

performance and

reduction of safety

hazards the current

flow should be from

lead 3 to 4.

Type

Power

0.138±0.020

Resistance Value

Tolerance

±1%, ±5%

0.023Lead Dia.

0.032 Lead Dia.

WIRE AND FILM TECHNOLOGIES

736 Greenway Road · PO Box 1860

Boone, North Carolina 28607-1860

Tel:

828-264-8861

Fax:

828-264-8865

LFR-21.87OHM1% Related Products

	LFR-21.87OHM1%	LFR-22.49OHM1%	LFR-224.9OHM1%	LFR-2249OHM1%
Description	Fixed Resistor - Fusible, 2W, 1.87ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4	Fixed Resistor - Fusible, 2W, 2.49ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4	Fixed Resistor - Fusible, 2W, 24.9ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4	Fixed Resistor - Fusible, 2W, 249ohm, 1% +/-Tol, 50ppm/Cel, Through Hole Mount, RADIAL LEADED-4
package instruction	RADIAL LEADED-4	RADIAL LEADED-4	RADIAL LEADED-4	RADIAL LEADED-4
Reach Compliance Code	unknown	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99	EAR99
Other features	FLAME PROOF	FLAME PROOF	FLAME PROOF	FLAME PROOF
fuse time	1000 s	1000 s	1000 s	1000 s
Installation features	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT
Number of terminals	2	2	2	2
Package shape	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE
Rated power dissipation(P)	2 W	2 W	2 W	2 W
resistance	1.87 Ω	2.49 Ω	24.9 Ω	249 Ω
Resistor type	FIXED RESISTOR - FUSIBLE	FIXED RESISTOR - FUSIBLE	FIXED RESISTOR - FUSIBLE	FIXED RESISTOR - FUSIBLE
surface mount	NO	NO	NO	NO
Temperature Coefficient	50 ppm/°C	50 ppm/°C	50 ppm/°C	50 ppm/°C
Terminal shape	WIRE	WIRE	WIRE	WIRE
Tolerance	1%	1%	1%	1%
Maker	-	TT Electronics plc	TT Electronics plc	TT Electronics plc

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