High Voltage
Chip Resistors
HVC Series
Welwyn Components
•
•
•
•
•
Continuous voltages up to 3kV
Overload voltages up to 4kV
Values up to 100M
Tolerances to ±0.5%
Robust thick film construction
Electrical Data
1206
Power rating @70°C
Limiting element voltage
Overload voltage (2s)
Resistance range
Resistance tolerance
TCR
Ambient temperature range
Values
Thermal Impedance
°C/W
200
Watts
Volts
Volts
Ohms
%
ppm/°C
°C
0.3
1000
1500
2010
0.5
2000
3000
100K to 100M
0.5,1,2,5,10
100
-55 to +155
E24 & E96 preferred
80
70
Any value to order
2512
1
3000
4000
DC or AC peak
Consult factory for
out of range values
See table of
value ranges
Notes
Value Ranges (Ohms)
Tolerance %
Size
1206
2010
2512
10
100K to 100M
100K to 100M
100K to 100M
5
100K to 100M
100K to 100M
100K to 100M
2
100K to 10M
100K to 10M
100K to 10M
1
100K to 2M
100K to 10M
100K to 10M
0.5
N/A
N/A
100K to 10M
Physical Data
Dimensions (mm) & Weight (g)
L
1206
2010
2512
3.2±0.2
5.1±0.2
6.5±0.2
W
1.6±0.2
2.5±0.2
3.2±0.2
T
0.6±0.1
0.7±0.1
0.7±0.1
A
0.35±0.2
0.45±0.2
0.45±0.2
B
1.95 min
3.70 min
5.00 min
C
0.35±0.2
0.4±0.25
0.4±0.2
Wt.
0.010
A
C
T
B
L
0.035
0.055
A
W
Wrap-around terminations
(3 faces)
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.
A subsidiary of
TT electronics plc
Issue D · 11.05
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
84
High Voltage
Chip Resistors
HVC Series
Construction
Resistive thick film material, overglaze and organic
protection are screen printed on a 96% alumina substrate.
The design and laser adjustment of the resistive element
optimises the limiting element voltage of the resistor.
Welwyn Components
Solderability
The terminations have an electroplated nickel barrier and tin
finish. This ensures excellent ‘leach’ resistance properties and
solderability.
Marking
Terminations
The chips are supplied with wrap-around terminations
suitable for soldering. Consult factory for alternative
termination options.
The body protection is resistant to all normal cleaning solvents
suitable for printed circuits. The chips are not marked and the
relevant information on type, value, tolerance date code and
quantity are recorded on the reel.
Performance Data
Maximum
Load at rated power:
Shelf life test:
1000 hours rated load @ 70°C
Typical
1206:
1
2010/2512:
0.25
0.02
Zero at 155°C
0.2
0.2
0.1
0.25
0.05
0.05
1206:
-15
2010:
-5
2512:
-1.5
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
Volts
ppm/V
1206:
2
2010/2512:
1
0.1
2
0.5
0.5
1
0.25
0.25
500
1206:
-25
2010:
-15
2512:
-5
12 months at room temperature
Derating from rated power at 70°C
Short term overload:
Lightning strike:
Dry heat:
Lesser of 6.25 x rated power or 1.5 x LEV for 2S
1.2/50µs & 10/700µs - see graph for peak voltage
1000 hours at 155°C
Long term damp heat
Temperature rapid change
Resistance to solder heat
Voltage proof
Voltage coefficient of resistance
Maximum Continuous Voltage
3500
8
Lightning
Strike
Performance
Peak Voltage (kV)
3000
2500
6
Voltage (V)
2000
1500
1000
4
2
0
500
0
0.1
1
10
100
1206-1.2/50
2010-10/700
1206-10/700
2512-1.2/50
2010-1.2/50
2512-10/700
0.1
1
10
100
Resistance Value (MOhms)
Resistance Value (MOhms)
HVC1206
HVC2512
HVC2010
Commodity Chip
Note: maximum peak voltage tested was 6kV; performance beyond this is estimated.
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue D · 11.05
85
High Voltage
Chip Resistors
HVC Series
Welwyn Components
Application Notes
HVC resistors are ideally suited for handling by automatic
methods due to their rectangular shape and the small
dimensional tolerances. Electrical connection to a ceramic
substrate or to a printed circuit board can be made by reflow
or wave soldering of wrap-around terminations.
Wrap-around terminations provide good leach properties and
ensure reliable contact. Due to the robust construction, the
HVC can be immersed in the solder bath for 30 seconds at
260°C. This enables the resistor to be mounted on one side
of a printed circuit board and wire-leaded components
applied on the other side.
HVC resistors themselves can operate at a maximum
temperature of 155°C (see performance above). For soldered
resistors, the joint temperature should not exceed 110°C. This
condition is met when the stated power levels at 70°C are used.
The PCB layout should avoid tracks running between the HVC
mounting pads, as this would compromise the LEV.
The LEV stated applies to operation at sea-level pressure, in a
non-condensing atmosphere and non-contaminating
environment. Voltage derating should be applied if low
pressure, high humidity or contamination may be encountered.
The termination clearance dimension (B) should be used in
conjunction with the creepage limit applicable to the circuit
application in order to determine the derated LEV.
Packaging
HVC Resistors are supplied taped and reeled as per IEC 286-3.
T
2
D
0
P
2
P
0
T
Marking
(Both sides)
33
±
1.0
Wr
E
13
±
0.5
F
178
±
2
80
±
2
B
0
2.5
±
0.5
0.8
±
0.15
T
1
K
0
A
0
P
1
D
1
Tape and reel dimensions (mm)
Wr
±0.5
1206
2010
2512
9
13
13
W
±0.3
8
12
12
P1
±0.1
4
8
8
P0
±0.1
4
4
4
P2
±0.05
2
2
2
D0
±0.1
1.5
1.5
1.5
D1
±0.2
1
1.5
1.5
E
±0.1
1.75
1.75
1.75
F
±0.05
3.5
5.5
5.5
A0
±0.1
1.95
2.79
3.61
B0
±0.1
3.55
5.89
6.96
K0
±0.1
1.0
0.91
1.17
T
±0.05
0.2
0.28
0.28
T1
Nom.
0.05
0.06
0.06
T2
±0.15
1.3
1.21
1.45
G
W
Qty.
per
reel
3000
3000
1800
Ordering Procedure
Example: HVC2512 at 4.7 megohms and 1% tolerance on a reel of 1800 pieces -
Type
Size
Value (use IEC62 code)
Tolerance (use IEC62 code)
D
F
G
0.5%
1%
2%
J
K
5%
10%
T3
T18
Tape
1206 or 2010
2512
3000/reel
1800/reel
HVC
2512
-
4M7
F
T18
Packing
Standard
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
86
Issue D · 11.05
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