V700 Datasheet, PDF (1/2 Pages) Welwyn Components Limited – Vitreous Enamelled Wirewound Resistors

Vitreous Enamelled
Wirewound Resistors
V700 (RB Style) Series
• BS/CECC approved
• ^{Stability for harsh environments}
• ^{Overload characteristics ideal for}
protection circuits
• ^{High stability and reliability}
• ^{High power dissipation for size}
• ^{Impervious lead free vitreous enamel coating}
Welwyn Components
Electrical Data
Power rating at 25°C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
watts
ohms
volts
ppm/°C
%
V757
V758
V759
V760
V761
(RB57)
(RB58)
(RB59)
(RB60)
(RB61)
7
11.0
3.0
8.0
5.0
0R1 to 20K 0R2 to 82K 0R1 to 10K 0R1 to 56K 0R1 to 15K
200
400
100
250
160
Typically: +75
Maximum +120
5 Closer tolerances to special order
Approved CECC 40201 - 001
Power rating at 25°C
Power rating at 70°C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
* See temperature rise in graph Application Notes
Physical Data
watts
watts
ohms
volts
ppm/°C
%
°C/watt
°C
6.5
3.0
8.0
5.0
5.6
2.6
6.9
4.3
0R1 to 20K
0R1 to 10K 0R1 to 56K 0R15 to 15K
160
63
250
160
>20 ohms ±500
≥20 ohms -50 +250
5
5
5
5
E24 preferred. Other values to special order
44
32
88
36
58
-55 to 200
Maximum Dimensions (mm) and Weight (g)
Type
L max D max f min
V757 (RB57) 22.2
8
30
V758 (RB58) 47
11
30
V759 (RB59) 12.7
5.6
30
V760 (RB60) 36
10.0
30
V761 (RB61) 23
7.0
30
d max
0.88
0.88
0.88
0.88
0.88
Wt. Nom
2
9
1
4
2
dD
L
f
Construction
A high purity ceramic substrate is assembled with force fit
end caps to which are welded the termination wires.
The resistive element is wound on the substrate and welded to
the caps; the vitreous enamel protective coating is then applied.
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
A subsidiary of
TT electronics plc
Issue B · 03.02
87