NFR25 Datasheet, PDF (1/8 Pages) Vishay Siliconix – Fusible, Non-Flammable Resistors

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 T_amb = 70 °C
Thermal resistance R_th
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: [e-mail]
www.vishay.com
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