NKS.
Vishay Draloric
Metal Film Resistors, Fusible Type
FEATURES
•
Fusible resistor for constant current designed
for overload protection
•
Lead (Pb)-free solder contacts
•
Pure tin plating provides compatibility with lead (Pb)-free
and lead containing soldering processes
•
Compatible with “Restriction of the use of Hazardous
Substances” (RoHS) directive 2002/95/EC (issue 2004)
•
High positive temperature coefficient (refer to graph)
•
Flame retardant coating
•
Definded switch-off behaviour
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
DIN
SIZE
POWER RATING
P
70 °C
W
0.4
TEMPERATURE
COEFFICIENT
ppm/K
see diagram
TOLERANCE
%
±5
± 10, ± 20
±5
± 10, ± 20
RESISTANCE
RANGE
Ω
1R0 - 20R
R10 - 20R
1R0 - 20R
R10 - 20R
E-SERIES
NKS2
0207
12 - 24
12
12 - 24
12
NKS4
0414
0.7
see diagram
Notes
• Further values on request
• Rated voltage
P
×
R
• Coating: red-brown
• Marking: additional 5
th
band, black
PART NUMBER AND PRODUCT DESCRIPTION
PART NUMBER: NKS2207B01009K2500
N
MODEL/SIZE
NKS2207
NKS4414
K
S
2
2
0
7
TCR
B
0
1
VALUE
0
0
9
K
2
5
0
0
SPECIAL
up to 2 digits
00
= standard
SPECIAL CHARACTER
B
= Fusible
TOLERANCE
J
=±5%
K
= ± 10 %
M
= ± 20 %
PACKAGING
22
= A2
25
= A5
41
= A1
D5
= R5
DE
= RE
GP
= RP
0
= neutral
see diagram
3 digit value
1 digit multiplier
MULTIPLIER
7
= *10
-3
8
= *10
-2
9
= *10
-1
0
= *10
0
PRODUCT DESCRIPTION: NKS2 10R 10 % A5
NKS2
MODEL
NKS2
NKS4
10R
RESISTANCE VALUE
1R0
= 1
Ω
10R
= 10
Ω
10 %
TOLERANCE
±
5
%
±
10
%
±
20
%
A5
PACKAGING
1)
R5
RE
RP
A5
A2
A1
1)
Please refer to table PACKAGING, page 126.
Note
• The PART NUMBER shown above is to facilitate the unified part numbering system for ordering products.
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124
For technical questions, contact: ff3dresistors@vishay.com
Document Number: 20124
Revision: 17-Jan-07
NKS.
Metal Film Resistors, Fusible Type
Vishay Draloric
DIMENSIONS
6 mm*
L
1
L
D
d
DIMENSIONS
[in millimeters]
MODEL
D
L
L
1 max
B
d
e
e
B
NKS2
2.5
- 0.5
4.1
- 0.5
6.0
- 0.5
12.0
- 1.5
7.0
53 ± 1
1)
0.6
7.5
• Taping in acc. with IEC60286-1
• D and L measured in acc. with IEC60294
• d according to IEC60301
1)
Also
NKS4
14.0
73 ± 1
1)
0.8
15
available in 26 mm tape spacing
TECHNICAL SPECIFICATIONS
PARAMETER
Rated Dissipation at 70 °C
Minimum Overload to Fuse
Time to Fuse (max)
Voltage Coefficient
Thermal Resistance
Thermal Time Constant
τ
Category Temperature Range
Failure Rate
Weight
UNIT
W
W
s
1/V
K/W
s
°C
10
-9
/h
g
0.2
≤
220
8
- 55 to + 155
< 30
0.7
NKS2
0.4
1.5
30
< 10
-7
≤
130
20
NKS4
0.7
2.8
60
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
70
100
150
AMBIENT TEMPERATURE IN °C
NKS4
NKS2
TEMPERATURE COEFFICIENT 10
-6
/K
POWER RATING WATTS
6000
5000
4000
3000
2000
1000
0.1
Ω
1
Ω
10
Ω
20
Ω
RESISTANCE VALUE
Ω
DERATING
TEMPERATURE COEFFICIENT
Document Number: 20124
Revision: 17-Jan-07
For technical questions, contact: ff3dresistors@vishay.com
www.vishay.com
125
NKS.
Vishay Draloric
FUSING PERFORMANCE
100
70
50
NKS4
NKS2
Metal Film Resistors, Fusible Type
TIME TO FUSE (SECS)
30
20
10
7
5
3
2
1
0.7
0.5
0
1.5
2
2.8
4
6
OPENING POWER IN WATTS CALCULATED WITH RATED RESISTANCE
PACKAGING
REEL
MODEL
PIECES/REEL
CODE
MIN. ORDER QTY
PACKAGING UNITS
PIECES/BOX
2000
5000
BOX
CODE
A2
A5
MIN. ORDER QTY
PACKAGING UNITS
2
1
NKS2
5000
R5
1
NKS4
2500
RE
1
1000
A1
1
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126
For technical questions, contact: ff3dresistors@vishay.com
Document Number: 20124
Revision: 17-Jan-07
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(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
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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