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| 型號： | NFR25 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Fusible, Non-Flammable Resistors |
| 中文描述： | 易熔，不易燃電阻 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 96K |
| 代理商： | NFR25 |
Document Number: 28737
Revision: 24-Feb-04
For technical questions contact: ff3dresistors@vishay.com
www.vishay.com
1
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”.
Note
1.
Ohmic values (other than resistance range) are available on request.
TECHNICAL SPECIFICATIONS
DESCRIPTION
VALUE
NFR25
NFR25H
Resistance range
Resistance tolerance and series
Maximum dissipation at T
Thermal resistance R
Temperature coefficient:
0.22
≤
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
(1)
0.22
5 %; E24 series
to 15 k
±
amb
= 70
°
C
0.33 W
240 K/W
0.5 W
150 K/W
th
≤
±
200
200
100
250 V
×
10
10
10
6
/K
6
/K
6
/K
≤
±
200
100
100
350 V
×
10
10
10
6
/K
6
/K
6
/K
≤
±
×
≤
±
×
≤
±
×
≤
±
×
IEC 60115-1 and 60115-2
55/155/56
R/R max.:
R/R max.:
R/R max.:
±
1 % + 0.05
1 % + 0.05
0.25 % + 0.05
±
±
12NC ORDERING CODE INDICATING RESISTOR TYPE AND PACKAGING
TYPE
ORDERING CODE 23.. ... .....
BANDOLIER IN AMMOPACK
BANDOLIER
ON REEL
RADIAL TAPED
STRAIGHT LEADS
STRAIGHT LEADS
4000
units
1000
units
5000
units
5000
units
NFR25
06 204 03...
22 205 13...
22 205 33...
22 205 23...
NFR25H
06 207 03...
22 207 13...
22 207 33...
22 207 23...
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