Document Number: 30256 For technical questions, contact: filmresistors.leaded@vishay.com
www.vishay.com
Revision: 06-Dec-07 1
NFR01, NFR02, NFR03
Vishay BCcomponents
Fusible Power Metal Film Leaded Resistors
A homogenous film of metal alloy is depositded on a high
grade ceramic body. After a helical groove has been cut in
the resistive layer, tinned electrolytic copper wires are
welded to the end-caps. The resistors are coated with a red
non-flammable 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“.
FEATURES
• Metal film technology
• High power (upto 3 W) in small package
• Small standard sizes (0207/0414/0617)
• High stability, reliability and uniformity characteristics
• Defined interruption behaviour (fusing time)
• Various forming styles
• Non flammable
• Compatible with lead (Pb)-free and lead containing
soldering processes
• Lead (Pb)-free and RoHS compliant
APPLICATIONS
• Audio
• Video
Note
(1)
Resistance values below 0.47 Ω with ± 10 % tolerance are available on request
TECHNICAL SPECIFICATIONS
DESCRIPTION NFR01 NFR02 NFR03
Resistance Range
(1)
0.47 Ω to 1 kΩ
Resistance Tolerance ± 5 %; E24 series
Temperature Coefficient ± 200 ppm/K
Climatic Category
(LCT/UCT/days)
55/155/56
Rated Dissipation P
70
1 W 2 W 3 W
Maximum Permissible Voltage:
DC or RMS
350 V 500 V
Fusing Power
0.47 Ω to 10 Ω; ≥ 20 x Pn
10.1 Ω to 1 kΩ; ≥ 16 x Pn
Fusing Time ≤ 60 s
Maximum Resistance Change at P
70
for Resistance Range,
ΔR max., after:
Load ± (5 % R +0.1Ω)
Climatic Tests ± (3 % R +0.1Ω)
Resistance to Soldering Heat ± (1 % R +0.05Ω)
