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PDF NFR25H Data sheet ( Hoja de datos )
| Número de pieza | NFR25H | |
| Descripción | Fusible/ Non-Flammable Resistors | |
| Fabricantes | Vishay Siliconix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NFR25H (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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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 Ω
4.7 Ω < R ≤ 15 Ω
15 Ω < R ≤ 15 kΩ
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 Ω to 15 kΩ
± 5 %; E24 series
NFR25H
0.5 W
150 K/W
≤ ± 200 × 10−6/K
≤ ± 200 × 10−6/K
≤ ± 200 × 10−6/K
≤ ± 100 × 10−6/K
≤ ± 100 × 10−6/K
≤ ± 100 × 10−6/K
250 V
350 V
IEC 60115-1 and 60115-2
55/155/56
∆R/R max.: ± 1 % + 0.05 Ω
∆R/R max.: ± 1 % + 0.05 Ω
∆R/R max.: ± 0.25 % + 0.05 Ω
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
1
1 page  
NFR25/25H
Fusible, Non-Flammable Resistors Vishay BCcomponents
10 3
P max
(W)
10 2
10
1
pt i/t = 1000
500
200
100
50
20
10
5
2
10 1
10 6
1200
Vmax
(V)
800
10 5
10 4
10 3
10 2
10 1
t i (s)
NFR25H Pulse on a regular basis; maximum permissible peak pulse power
(Pmax) as a function of pulse duration (ti).
1
400
0
10−6
Pulse Loading Capabilities
10−5
10−4
10−3
10−2
10−1
ti (s)
1
NFR25H Pulse on a regular basis; maximum permissible peak pulse
voltage (Vmax) as a function of pulse duration (ti).
100
∆T
(K)
80
60
40
Application Information
Document Number: 28737
Revision: 24-Feb-04
20
0 NFR25 Hot-spot temperature rise (∆T)
0 0.2 0.4 P (W) 0.6 as a function of dissipated power.
For technical questions contact: [email protected]
www.vishay.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet NFR25H.PDF ] | |
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