NFR25H0004708JR500 Datasheet, PDF (1/10 Pages) Vishay Siliconix – Fusible, Non-Flammable Metal Film Leaded Resistors

NFR25, NFR25H
Vishay BCcomponents
Fusible, Non-Flammable Metal Film Leaded Resistors
DESCRIPTION
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
encapsulant is resistant to all cleaning solvents in
accordance with IEC 60068-2-45.
FEATURES
• Technology: Metal film
• Overload protection without risk of fire
• Wide range of overload currents (refer Fusing
Characteristics graphs)
• Lead (Pb)-free solder contacts
• Pure tin plating provides compatibility with lead (Pb)-free
and lead containing soldering processes
• Compatible to RoHS directive 2002/95/EC
APPLICATIONS
• Audio
• Video
TECHNICAL SPECIFICATIONS
DESCRIPTION
UNIT
NFR25
Resistance Range ⁽¹⁾
Ω
0.22 to 15k
Resistance Tolerance
%
±5
Resistance Series
E24
Rated Dissipation, P₇₀
Thermal Resistance (R_th)
Temperature Coefficient
W
0.33
K/W
240
0.22 Ω ≤ R ≤ 4.7 Ω
4.7 Ω < R ≤ 15 Ω
ppm/K
≤ ± 200
≤ ± 200
15 Ω < R ≤ 15 kΩ
≤ ± 100
Operating Voltage, U_max. DC or RMS
Basic Specifications
V
250
IEC 60 115-1
Climatic Category (IEC 60068-1)
55/155/56
Max. Resistance Change for Resistance Range,
ΔR max., after:
Load (1000 h, P₇₀):
Long Term Damp Heat Test (56 Days):
± (1 % R + 0.05 Ω)
± (1 % R + 0.05 Ω)
Soldering (260 °C, 10 s):
± (0.25 % R + 0.05 Ω)
Notes
• R value is measured with probe distance of 24 mm ± 1 mm using 4-terminal method
(1) _{Ohmic values (other than resistance range) are available on request}
NFR25H
0.22 to 15k
±5
E24
0.5
150
≤ ± 200
≤ ± 100
≤ ± 100
350
IEC 60 115-1
55/155/56
± (1 % R + 0.05 Ω)
± (1 % R + 0.05 Ω)
± (0.25 % R + 0.05 Ω)
www.vishay.com
1
For technical questions, contact: [e-mail]
Document Number: 28737
Revision: 30-Mar-10