High Voltage
High Voltage
High Voltage Resistors
Metal Film
Metal Film Resistors
Metal Film Resistors
MH Series
MH Series
Welwyn Components
Welwyn Components
·
MH Series
60065 Approval
BSEN
MH37
MH37 meets requirements of
for
60065
•
BSEN
in
range 680K to 3M
in value
value range 680K to 3M
•
BSEN 60065 Approval for MH37
·
in
•
value
working
680K to
to 3.5KV
High
High
range
voltage
3M
working voltage to 3.5KV
·
•
HighSmall sizevoltage to 3.5KV
Small
working
•
size
·
•
Small
pulse
pulse load capability
High
High
load capability
•
size
·
•
HighRobustload
coating
Robust cement
capability
•
pulse cement coating
·
•
Robust cement coating
Value up to 10M
10M
•
Value up to
•
Value up to 10M
Electrical Data
Electrical Data
Power rating at 70°C max
Power Resistance range
rating at 70°C max
Limiting element voltage
Resistance range
Isolation voltage
Limiting element voltage
TCR
Isolation voltage
TCR
Resistance tolerance
Standard values
Resistance tolerance
Thermal
Standard valuesimpedance
Ambient temperature range
Thermal impedance
Ambient temperature range
watts
watts ohms
volts dc or ac peak
ohms
volts dc or ac peak volts
ppm/°C
volts
ppm/°C
%
%
°C/watt
°C/watt
°C
°C
140
MH25
MH25
0.25
100K - 10M
0.25
1,600
100K - 10M
1,600
700
700
100
MH37
MH37
0.5
0.5100K - 3M
3,500
100K - 3M
3,500
100 1, 2, 5
E242, 5 E96 preferred
1, and
140 and E96 preferred
E24
- 55 to 155
- 55 to 155
112
112
Physical Data
Physical Data
Weight (g)
Dimensions (mm) and
Dimensions (mm) and Weight (g)
PCB
Min
d
d
D
D
L
mounting Bend
PCB
Min
Type
L max
D max
f min
d nom
centres
Radius Wt.nom
mounting Bend
Type
MH25
L max 6.2 max 2.5 min 21.0nom 0.6
D
f
d
centres 10.2
Radius 0.6
Wt.nom 0.3
9.0 2.5
3.721.0 19.60.6
0.810.2 12.70.6
1.2 0.3
0.5
MH25 MH37
6.2
MH37
L
f
f
Construction
9.0
3.7
19.6
0.8
12.7
1.2
0.5
Terminations
Thin film material is sputtered on to high grade ceramic rods.
Material
Solder-coated copper wire.
Terminations
Nickel plated steel caps are force fitted and the termination
Thin film material is sputtered on to high grade ceramic rods.
Material
Strength
Solder-coated copper wire.
The terminations satisfy the requirements of
wires are welded to the caps. The value is obtained by a
Nickel plated steel caps are force fitted and the termination
IEC 68.2.21.
Strength
The terminations satisfy the requirements of
helical cut in the film and finally the resistor body is protected
wires are welded to the caps. The value is obtained by a
IEC The terminations meet the requirements of
Solderability
68.2.21.
by a cement protection applied so that the terminations
helical cut in the film and finally the resistor body is protected
IEC 115-1, Clause 4.17.3.2
remain completely clear.
Solderability
The terminations meet the requirements of
by a cement protection applied so that the terminations
IEC 115-1, Clause 4.17.3.2
remain completely clear.
Construction
Marking
Solvent resistance
The body protection and marking are resistant to all normal
1% tolerance resistors are colour coded with 5 bands.
Solvent resistance
industrial cleaning fluids suitable for printed boards.
2% and 5% tolerance have 4. Band IEC 62 colours are used.
The body protection and marking are resistant to all normal
1% tolerance resistors are colour coded with 5 bands.
industrial cleaning fluids suitable for printed boards.
2% and 5% tolerance have 4. Band IEC 62 colours are used.
Marking
General Note
General Note
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
TT electronics reserves the right to make changes in product specification without notice or liability.
TT electronics plc
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject
Components Limited
and is considered accurate
time NE22 7AA, UK
print.
© Welwyn
to Welwyn’s own data and Bedlington, accurate at
at time of going to
A subsidiary of
All information is subject
to TT electronics’ own data
· is consideredNorthumberland of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
Issue E
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
TT electronics plc · 10.05
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
Issue E · 10.05
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
11. 11
191
High Voltage
High Voltage
Metal Film Resistors
Metal Film Resistors
High Voltage
High Voltage
MH Series
MH Series
Metal Film Resistors
Metal Film Resistors
MH Series
MH Series
Performance Data
Performance Data
Load at rated voltage : 1000 hrs at 70°C
Load at rated voltage : 1000 hrs at 70°C
Derating from rated power at 70°C
Derating from rated power at 70°C
Overload
Overload
Load at at DHSS
56 days rated voltage : 1000 hrs at 70°C
56 days at DHSS
Derating
Climatic from rated power at 70°C
Climatic
Overload
Climatic category
Climatic category
56 days at DHSS
Temperature rapid change
Temperature rapid change
Climatic
Resistance to solder heat
Resistance to solder heat
Climatic and bump
Vibrationcategory
Vibration and bump
Temperature
Voltage proofrapid change
Voltage proof
Resistance to solder heat
Voltage proof
Welwyn Components
Welwyn Components
Welwyn Components
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
∆
R%
∆
R%
∆
∆
R%
∆
R%
∆
R%
∆
R%
∆
vol%
R ts
volts
∆
R%
volts
Maximum
Maximum
1.5
1.5
Maximum
1.0
1.0
15
1..5
1.5
1.5
1.5
1.0
0.5
0.5
0.5
1
0.5
1
0 .5
0.5
0.5
0.5
0.5
700 min
Typical
Typical
0.4
0.4
Performance Data
Zero at 155°C
Zero at 155°C
Typical
0.25
0.25
04
0..2
0.2
Zero at 155°C
0.2
0.2
0.25
55/155/56
55/155/56
0002
.. 5
0.05
0002
.. 5
0.05
55/155/56
0.05
0.05
0.05
700 min
700 min
0.05
0.05
Vibration and
Notes
∆
R%
Application
bump
Application
reliable performance at high voltages care should
Notes
To ensure
To ensure reliableavoid potentialat high voltages care should
be taken to performance sources of ionic contamination
be taken to avoid potential body, for example, flux applied by
contacting the resistor sources of ionic contamination
Application Notes
for example, flux applied
contacting theencapsulation materials or contaminantsby
resistor body,
spraying, reliable performance at high voltages care should
from the
To ensure
spraying, encapsulation materials or contaminants from the
environmentavoid
be taken to of use.
environment of use. potential sources of ionic contamination
contacting the resistor body, for example, flux applied by
Packaging
spraying, encapsulation materials or contaminants from the
Packaging
All MH series of use. are supplied tape packed ready for
environment resistors
All MH serieson automatic supplied tape packed ready for
loading resistors are sequencing and insertion machines.
loading on automatic sequencing and insertion machines.
Component wires will not supplied tape packed outside edge
All MH wires resistors are protrude beyond the ready for
Component series will not protrude beyond the outside edge
of the tape.
loading
of the tape. on automatic sequencing and insertion machines.
Alternative packing available by request.
Component wires will not request.
Alternative packing available byprotrude beyond the outside edge
of the tape.
Lead Formed Resistors can also be supplied. Standard options
Leadof Lancet, Radial and Goal be supplied. Standard options
Formed Resistors can also Post
are shown in
Alternative packing available by formingshown in the the
of Lancet, Form informationPost forming are
Radial and Goal sheet. request.
Lead
Lead Form information sheet.
Lead Formed Resistors can also be supplied. Standard options
of Lancet, Radial and Goal Post forming are shown in the
Lead Form information sheet.
Packaging
6
6
52
52
6
6
5
6
52
56
f
1
f
2
Body Location f
1
– f
2
≤
1.4 mm
Body Location f
1
– f
2
≤
1.4 mm
f
1
f
2
Body Location f
1
– f
2
≤
1.4 mm
f
1
f
2
5
Ordering Procedure
Ordering Procedure
Example: MH25 at 4.7 megohms and 1% tolerance in ammo pack box of 5000 pieces
–
Example: MH25 at 4.7 megohms and 1% tolerance in ammo pack box of 5000 pieces
–
MH25
–
4M7F
I
MH25
–
4M7F
I
Example: MH25 at 4.7 megohms and 1% tolerance in ammo pack box of 5000 pieces
–
Type
Type
MH25
–
4M7F
I
Value (use IEC62 code)
Value (use IEC62 code)
Type
Tolerance (use IEC62 code)
Tolerance (use IEC62 code)
F 1%
F
Value (use IEC62 code)
1%
G 2%
2% 5%
J
Tolerance (use IEC62 code)
5%
F 1%
Packing
G
Packing
2%
MH25
5000/box
J
I
5% Ammo
Standard
MH25
5000/box
MH37
2500/box
I
Ammo
Standard
MH37
2500/box
G
J
Ordering Procedure
192
Issue E · 10.05
Issue E · 10.05
Telephone: +44 (0) 1670 822181
right to make changes in product specification without notice or
·
liability.
www.welwyn-tt.com
· Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com Website:
TT electronics reserves the
192
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Issue E · 10.05
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT electronics plc
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
MH25
5000/box
I
Ammo
Standard
© Welwyn Components
822181 · Facsimile: +44 (0) 1670 829465 NE22 7AA, UK
Telephone: +44 (0) 1670
Limited
Bedlington, Northumberland · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
General Note
MH37
2500/box
Packing
192
11. 11
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