PR Datasheet, PDF (1/2 Pages) MTRONPTI – 3.5 x 6.0 x 1.0 mm Surface Mount Crystals

Precision Metal
Film Resistors
PR series
• Low cost precision resistors
• ^{Tolerances down to ±0.1%}
• ^{TCR down to 15ppm/°C}
Welwyn Components
Electrical Data
Power rating at 70°C
Resistance range
Limiting element voltage
TCR*
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
*15ppm/°C available by request
watts
ohms
volts
ppm/°C
%
°C/watt
°C
PR4
0.25
100R – 240K
250
25
0.1, 0.25, 0.5, 1
E192
140
-55 to 155
PR5
0.5
100R – 1M
350
25
0.1, 0.25, 0.5, 1
E192
112
Physical Data
Dimensions (mm) & Weight (g)
Type
L Max D Max f min
PR4
6.2
2.5
21
PR5
9.0
3.6
19.6
d nom
0.6
0.8
PCB
Min.
mounting bend
centres radius Wt.nom
10.2
0.6
0.3
12.7
1.2
0.5
d
D
L
f
Construction
The resistance element is a precisely controlled thin film of
metal alloy sputtered on to a high purity ceramic core,
protected by a moisture-resistant, high dielectric strength
coating applied so that terminations remain completely clear.
This permits a well defined body length (clean lead to clean
lead dimension L).
Terminations
Material
Solder-coated copper wire.
Strength
The terminations meet the requirements of
IEC 68.2.21
Solderability The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
Marking
Resistors are colour coded with 5 bands. IEC 62 colours are
used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
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A subsidiary of
TT electronics plc
Issue C · 04.03