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 Ωto 1 kΩ
Resistance Tolerance ± 5 %; E24 series
Temperature Coefficient ± 200 ppm/K
Climatic Category
(LCT/UCT/days) 55/155/56
Rated Dissipation P70 1 W 2 W 3 W
Maximum Permissible Voltage:
DC or RMS 350 V 500 V
Fusing Power
0.47 Ωto 10 Ω; ≥ 20 x Pn
10.1 Ωto 1 kΩ; ≥ 16 x Pn
Fusing Time ≤ 60 s
Maximum Resistance Change at P70
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)
www.vishay.com For technical questions, contact: filmresistors.leaded@vishay.com Document Number: 30256
2Revision: 06-Dec-07
NFR01, NFR02, NFR03
Vishay BCcomponents Fusible Power Metal Film Leaded
Resistors
12NC INFORMATION FOR HISTORICAL
CODING REFERENCE ONLY
•The resistors have a 12 digit ordering code starting with
2306
•The next 5 digits indicate the resistor type and packaging
•The last 3 digits indicate the resistance value:
– The first 2 digits indicate the actual resistance value
– The last digit indicates the resistance decade in
accordance with table
Last Digit of 12NC Indicating Resistance Decade
12NC Example
NFR01, 1 Ω, ± 5 %, ammopack 1000 pieces is
2306 208 13108
Notes
(1) The PART NUMBER is shown to facilitate the introduction of the unified part numbering system
(2) Please refer to table PACKAGING, see next page
RESISTANCE DECADE LAST DIGIT
0.47 Ω to 0.91 Ω7
1Ω to 9.1 Ω8
10 Ωto 91 Ω9
100 Ω to 910 Ω1
1 kΩ2
12NC - resistor type and packaging
DESCRIPTION
ORDERING CODE 2306 ... .....
BANDOLIER IN AMMOPACK BANDOLIER
ON REEL
TYPE TAPE WIDTH TOL. 500 UNITS 1000 UNITS 5000 UNITS 5000 UNITS
NFR01 52.5 ± 5 % - 208 13... 208 53... 208 23...
NFR02 52.5 ± 5 % - 209 13... - 209 23...
NFR03 63.0 ± 5 % 210 13... - - -
PART NUMBER AND PRODUCT DESCRIPTION
PART NUMBER (1): NFR0100001008JA100
MODEL/SIZE SPECIAL CHARACTER TCR/MATERIAL VALUE TOLERANCE PACKAGING (2) SPECIAL
NFR0100
NFR0200
NFR0300
0 = neutral 0 = standard 3 digit value
1 digit multiplier
Multiplier:
7 = *10-3
8 = *10-2
9 = *10-1
0 = *100
1 = *101
2 = *102
3 = *103
4 = *104
J = ± 5 % A1
A5
R5
AC
up to 2 digits
00 = standard
PRODUCT DESCRIPTION: NFR01 5 % A1 1R0
NFR01 5 % A1 1R0
MODEL TOLERANCE PACKAGING (2) RESISTANCE VALUE
NFR01
NFR02
NFR03
± 5 % A1
A5
R5
AC
1R0 = 1 Ω
470R = 470 Ω
01RFN 00001008JA100
Document Number: 30256 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com
Revision: 06-Dec-07 3
NFR01, NFR02, NFR03
Fusible Power Metal Film Leaded
Resistors Vishay BCcomponents
DIMENSIONS
MARKING
The nominal resistance and tolerance are marked on the resistor using four colored bands in accordance with IEC 60062 “Color
code for fixed resistors”. There is a fifth black band in order to indicate the type of resistor. Standard values of nominal resistance
are taken from the E24 series for resistors with a tolerance of ± 5 %.
FUNCTIONAL PERFORMANCE
PACKAGING
MODEL
REEL BOX
PIECES CODE PIECES CODE
NFR01 5000 R5 1000
5000
A1
A5
NFR02 5000 R5 1000 A1
NFR03 - - 500 AC
Ø D
L1
Ø d
L2
A
DIMENSIONS - resistor types, mass and relevant physical dimensions
TYPE L1 max.
(mm)
L2 max.
(mm)
Dmax.
(mm)
Ø d
(mm)
A
(mm)
MASS (g)/
100 pieces
NFR01 6.5 8.5 2.5 0.58 ± 0.05 52.5 ± 1.5 22
NFR02 10 12 4 0.80 ± 0.03 52.5 ± 1.5 50
NFR03 16.7 19.5 5.3 0.80 ± 0.03 63.0 ± 1.5 120
Maximum dissipation (Pmax.) in percentage of rated power as a function of ambient temperature (Tamb)
0
100
- 55 0 70 155
Ambient temperature amb
Power Dissipation
P
Derating - Standard Operation
ϑ
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4Revision: 06-Dec-07
NFR01, NFR02, NFR03
Vishay BCcomponents Fusible Power Metal Film Leaded
Resistors
APPLICATION INFORMATION
NFR01
NFR02
Hot Spot Solder Spot
Hot spot temperature rise (ΔT) as a function
of dissipated power
Temperature rise (ΔT) at the lead end (soldering
point) as a function of dissipated power at various leads
lengths after mounting
Hot Spot Solder Spot
Hot spot temperature rise (ΔT) as a function
of dissipated power
Temperature rise (ΔT) at the lead end (soldering
point) as a function of dissipated power at various leads
lengths after mounting
0
20
40
60
80
100
120
140
160
0 0.2 0.4 0.6 0.81.0
Δ
(°C)
T
(W)
P
Ø 0.58 mm Cu
0
10
20
030
40
50
60
0 0.2 0.4 0.6 0.81.0 1.2
Δ
(°C)
T
15 mm
20 mm
25 mm
Ø 0.58 mm Cu
(W)
P
0
20
40
60
80
100
120
140
160
0 0.5 1.0 1.5 2.0
Δ
(°C)
T
Ø 0.80 mm Cu
(W)
P
0
20
40
60
80
100
0 0.5 1.0 1.5 2.0
Δ
(°C)
T
15 mm
Ø 0.80 mm Cu
20 mm
25 mm
(W)
P
Document Number: 30256 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com
Revision: 06-Dec-07 5
NFR01, NFR02, NFR03
Fusible Power Metal Film Leaded
Resistors Vishay BCcomponents
NFR03
FUSING CHARACTERISTIC
The resistors will fuse without the risk of fire and within an indicated range of overload. Fusing means that the resistive value of
the resistor increases at least 100 times.
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with the schedule of IEC 60115-1, category 55/155/56 (rated temperature range
- 55 to + 155 °C; damp heat, long term, 56 days) and along the lines of IEC 60068-2; “Recommended basic climatic and
mechanical robustness testing procedure for electronic components” and under standard atmosphere conditions according to
IEC 60068-1 subclause 5.3, unless otherwise specified. In some instances deviations from IEC applications were necessary for
our specified method.
Hot Spot Solder Spot
Hot spot temperature rise (ΔT) as a function
of dissipated power
Temperature rise (ΔT) at the lead end (soldering
point) as a function of dissipated power at various leads
lengths after mounting
Resistance Range Power Overload Fusing Time
0.47 Ω - 10 Ω≥ 20 x maximum dissipation at 70 °C (Pn)
≤ 60 s
10.1 Ω - 1 kΩ≥ 16 x maximum dissipation at 70 °C (Pn)
0
20
40
60
80
0100
120
140
160
180
0 0.5 1.0 1.5 2.0 2.5 3.0
(W)
Δ
(°C)
T
Ø 0.80 mm Cu
P
0
20
40
60
80
100
0 0.5 1.0 1.5 2.0
Δ
(°C)
T
Ø 0.80 mm Cu
2.5 3.0
25 mm
15 mm
20 mm
(W)
P
PERFORMANCE
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE
REQUIREMENTS
PERMISSIBLE CHANGE (ΔR)
NFR01 NFR02 NFR03
4.8 - Temperature
coefficient
Between
- 55 °C and + 155 °C ± 200 ppm/K
4.25.1 - Endurance at 70 °C
1000 h;
loaded with Pn or Vmax.;
1.5 h ON; 0.5 h OFF
± (5 % R + 0.1 Ω)
4.26 - Accidental overload
Overload of 5, 10, 16, 25, 40, 63
and 100 times the rated power,
but the applied voltage shall not
exceed four times the limiting
voltage.
Non-flammable
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6Revision: 06-Dec-07
NFR01, NFR02, NFR03
Vishay BCcomponents Fusible Power Metal Film Leaded
Resistors
4.24 3 (Ca) Damp heat,
steady state
56 days; 40 °C;
90 to 95 % RH
loaded with 0.01 Pn
Rins min. 103 MΩ
± (3 % R + 0.1 Ω)
4.16 21 (U) Robustness of
terminations:
No damage
± (0.5 % R + 0.05 Ω)
4.16.2 21 (Ua1) Tensile all samples Load 10 N; 10 s
4.16.3 21 (Ub) Bending half number
of samples Load 5 N; 4 x 90°
4.16.4 21 (Uc) Torsion other half of
samples 3 x 360° in opposite direction
4.19 14 (Na) Rapid change of
temperature
30 min at LCT;
30 min at UCT;
LCT = - 55 °C;
UCT = 155 °C;
5 cycles
± (1 % R + 0.05 Ω)± (1 % R + 0.05 Ω)± (2 % R + 0.05 Ω)
4.23 Climatic sequence
Rins min. 103 MΩ
± (3 % R + 0.1 Ω)
4.23.2 2 (Ba) Dry heat 16 h, 155 °C
4.23.3 30 (Db) Damp heat
(accelerated)
24 h; 25 °C to 55 °C
90 % to 100 % RH; 1 cycle
4.23.4 1 (Aa) Cold 2 h, - 55 °C
4.23.6 30 (Db)
Damp heat,
(accelerated)
remaining cycles
5 days; 25 °C to 55 °C
90 to 100 % RH
4.22 6 (Fc) Vibration
Endurance by sweeping;
10 Hz to 500 Hz;
displacement 1.5 mm or
acceleration 10 g;
6 h (3 x 2 h)
No visual damage
± (0.5 % R + 0.05 Ω)
4.17 20 (Ta) Solderability
(after ageing)
16 h at 155 °C;
immersed in flux 600,
leads immersed 2 mm in
solder bath at
(235 ± 5) °C for
(2 ± 0.5) s
Good tinning
(≥ 95% covered);
no visible damage
4.18 20 (Tb) Resistance to
soldering heat
Solder bath method;
(350 ± 10) °C;
6 mm from body;
for 3 s
± (1 % R + 0.05 Ω)
4.29 45 (XA) Component solvent
resistance
Isopropyl alcohol;
MIL STD 202E No visible damage
4.7 - Voltage proof on
insulation
500 VRMS
during 1 min,
V-block method
No flashover or breakdown
4.6.1.1 - Insulation resistance
500 VDC
during 1 min,
V-block method
Rins min. 104 MΩ
PERFORMANCE
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE
REQUIREMENTS
PERMISSIBLE CHANGE (ΔR)
NFR01 NFR02 NFR03
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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Vishay
All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
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