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Vishay Siliconix - Fusible / Non-Flammable Resistors

Numéro de référence NFR25
Description Fusible / Non-Flammable Resistors
Fabricant Vishay Siliconix 
Logo Vishay Siliconix 





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NFR25 fiche technique
NFR25/25H
Vishay BCcomponents
Fusible, Non-Flammable Resistors
FEATURES
Overload protection without risk of fire
Wide range of overload currents.
APPLICATIONS
Audio
Video.
A homogeneous film of metal alloy is deposited on a high
grade ceramic body. After a helical groove has been cut in
the resistive layer, tinned connecting wires of electrolytic
copper are welded to the end-caps. The resistors are coated
with a grey, flame retardant lacquer which provides
electrical, mechanical, and climatic protection. The
encapsulation is resistant to all cleaning solvents in
accordance with “MIL-STD-202E, method 215”, and
“IEC 60068-2-45”.
TECHNICAL SPECIFICATIONS
DESCRIPTION
Resistance range(1)
Resistance tolerance and series
Maximum dissipation at Tamb = 70 °C
Thermal resistance Rth
Temperature coefficient:
0.22 Ω ≤ R 4.7
4.7 < R 15
15 < R 15 k
Maximum permissible voltage (DC or RMS)
Basic specifications
Climatic category (IEC 60068)
Stability after:
load
climatic tests
soldering
NFR25
0.33 W
240 K/W
VALUE
0.22 to 15 k
± 5 %; E24 series
NFR25H
0.5 W
150 K/W
± 200 × 106/K
± 200 × 106/K
± 200 × 106/K
± 100 × 106/K
± 100 × 106/K
± 100 × 106/K
250 V
350 V
IEC 60115-1 and 60115-2
55/155/56
R/R max.: ± 1 % + 0.05
R/R max.: ± 1 % + 0.05
R/R max.: ± 0.25 % + 0.05
Note
1. Ohmic values (other than resistance range) are available on request.
12NC ORDERING CODE INDICATING RESISTOR TYPE AND PACKAGING
ORDERING CODE 23.. ... .....
TYPE
NFR25
NFR25H
RADIAL TAPED
4 000
units
06 204 03...
06 207 03...
BANDOLIER IN AMMOPACK
STRAIGHT LEADS
1 000
units
5 000
units
22 205 13...
22 205 33...
22 207 13...
22 207 33...
BANDOLIER
ON REEL
STRAIGHT LEADS
5 000
units
22 205 23...
22 207 23...
Document Number: 28737
Revision: 24-Feb-04
For technical questions contact: [email protected]
www.vishay.com
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