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NFR25 PDF даташит

Спецификация NFR25 изготовлена ​​​​«Vishay Siliconix» и имеет функцию, называемую «Fusible / Non-Flammable Resistors».

Детали детали

Номер произв NFR25
Описание Fusible / Non-Flammable Resistors
Производители Vishay Siliconix
логотип Vishay Siliconix логотип 

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NFR25 Даташит, Описание, Даташиты
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 Tamb = 70 °C
Thermal resistance Rth
Temperature coefficient:
0.22 Ω ≤ 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
NFR25
0.33 W
240 K/W
VALUE
0.22 to 15 k
± 5 %; E24 series
NFR25H
0.5 W
150 K/W
± 200 × 106/K
± 200 × 106/K
± 200 × 106/K
± 100 × 106/K
± 100 × 106/K
± 100 × 106/K
250 V
350 V
IEC 60115-1 and 60115-2
55/155/56
R/R max.: ± 1 % + 0.05
R/R max.: ± 1 % + 0.05
R/R max.: ± 0.25 % + 0.05
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: [email protected]
www.vishay.com
1









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NFR25 Даташит, Описание, Даташиты
NFR25/25H
Vishay BCcomponents
Fusible, Non-Flammable Resistors
ORDERING INFORMATION
Numeric Ordering Code (12NC)
The resistors have a 12-digit ordering code starting with 23
The subsequent 7 digits indicate the resistor type and
packaging.
The remaining 3 digits indicate the resistance values:
– The first 2 digits indicate the resistance value.
– The last digit indicates the resistance decade.
DIMENSIONS
Last Digit of 12NC Indicating Resistance Decade
RESISTANCE DECADE
0.22 to 0.91
1 to 9.1
10 to 91
100 to 910
1 to 9.1 k
10 to 15 k
LAST DIGIT
7
8
9
1
2
3
Ordering Example
The ordering code for a NFR25 resistor with value 750 ,
supplied on a bandolier of 1000 units in ammopack is:
2322 205 13751.
L1
d
L2
Outline.
D
DIMENSIONS - resistor types and relevant physical dimensions
TYPE
NFR25
NFR25H
D
MAX.
2.5
L1
MAX.
6.5
L2
MAX.
7.5
d
0.58 ±0.05
MASS PER 100 UNITS
TYPE
NFR25
NFR25H
MASS
(g)
21
22
MARKING
The nominal resistance and tolerance are marked on the
resistor using four coloured bands in accordance with
IEC publication 60062 “Colour codes for fixed resistors”.
For ease of recognition a fifth ring is added, which is violet
for type NFR25 and white for type NFR25H.
OUTLINES
The length of the body (L1) is measured by inserting the
leads into holes of two identical gauge plates and moving
these plates parallel to each other until the resistor body is
clamped without deformation (“IEC publication 60294”).
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5%.
The values of the E24 series are in accordance with “IEC publication 60063”.
LIMITING VALUES
TYPE
NFR25
NFR25H
LIMITING VOLTAGE(1)
(V)
250
350
LIMITING POWER
(W)
0.33
0.5
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
The maximum permissible hot-spot temperature is 155 °C.
www.vishay.com
2
For technical questions contact: [email protected]
Document Number: 28737
Revision: 24-Feb-04









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NFR25 Даташит, Описание, Даташиты
NFR25/25H
Fusible, Non-Flammable Resistors Vishay BCcomponents
The power that the resistor can dissipate depends on the operating
temperature.
Pmax
(%Prated)
100
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.
The fusing characteristic is measured under constant voltage.
103
t
(s)
102
50 10
0
55
0
50 70 100
155
Tamb (°C)
Maximum dissipation (Pmax) in percentage of rated power as
a function of the ambient temperature (Tamb).
Derating
10 3
t
(s)
10 2
1
101
0 4 8 12 16 20 24
Poverload (W)
NFR25 This graph is based on measured data which may deviate
according to the application. Fusing Characteristics: 1 .
10 3
t
(s)
10 2
10 10
11
10 –1
0
4 8 12
Poverload(W)
NFR25 This graph is based on measured data which may deviate
according to the application. Fusing Characteristics: 1 Ω ≤ R 15 .
10 –1
0 4 8 12
Poverload (W)
NFR25 This graph is based on measured data which may deviate
according to the application. Fusing Characteristics: 15 Ω ≤ R 15 .
103
t
(s)
102
103
t
(s)
102
10 10
11
101
0 4 8 12 16 20 24
Poverload (W)
NFR25H This graph is based on measured data which may deviate
according to the application. Fusing Characteristics: 1 .
Fusing Characteristic
101
0 4 8 12 16 20 24
Poverload (W)
NFR25H This graph is based on measured data which may
deviate according to the application. Fusing Characteristic.
Document Number: 28737
Revision: 24-Feb-04
For technical questions contact: [email protected]
www.vishay.com
3










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