High Voltage
Resistors
Film Resistors
Metal
High Voltage
High Voltage
Metal
Series
Resistors
Film
MH
Metal Film Resistors
MH37
•
BSEN 60065 Approval for
MH Series
MH Series
in value range 680K to 3M
60065 Approval for
to 3.5KV
•
BSEN
meets requirements
voltage
MH37
MH37
•
High working
of BSEN 60065
Small size
in
value
•
range 680K to 3M
to 3M
in
value range 680K
•
High voltage to
•
High
working voltage to 3.5kV
3.5KV
High
working pulse load capability
Small
size
•
•
Small
size
Robust cement coating
High
pulse load capability
•
Value up to 10M
•
High
pulse load capability
Robust cement coating
•
Robust cement coating
Value
up
10M
•
Value
up to
to 10M
Welwyn Components
Welwyn Components
Electrical Data
Electrical
rating at 70°C max
Power
Data
Resistance range
Limiting element voltage
Power rating at 70°C max
Isolation voltage
Resistance range
TCR
Limiting element voltage
Resistance tolerance
Isolation voltage
Standard values
TCR
Thermal impedance
Resistance tolerance
Ambient temperature range
Standard values
Thermal impedance
Ambient temperature range
All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
MH25
watts
ohms
volts dc or ac peak
watts
0.25
volts
ohms
100K - 10M
ppm/°C
volts dc or ac peak
1,600
%
volts
ppm/°C
%
°C/watt
°C
°C/watt
°C
140
- 55 to 155
MH25
0.25
100K - 10M
1,600
MH37
700
100K - 3M
100
3,500
1, 2, 5
0.5
MH37
0.5
100K - 3M
3,500
- 55 to 155
E24 and E96 preferred
112
140
1, 2, 5
700
E24 and E96 preferred
100
112
Physical Data
Dimensions (mm) and Weight (g)
Physical Data
MH25
Type
MH25
MH37
6.2
MH37
9.0
L max
D max
PCB
Min
Wt.nom
0.3
0.5
d
D
L
f
d
D
Dimensions (mm) and Weight (g)
Type
L max
D max
2.5
3.7
f min
21.0
19.6
mounting Bend
f min
d nom
centres
Radius
PCB
Min
21.0
0.6
10.2
0.6
mounting Bend
19.6
0.8
12.7
1.2
d nom
centres
Radius Wt.nom
0.6
0.8
10.2
12.7
0.6
1.2
0.3
0.5
L
f
Thin film material is sputtered on to high grade ceramic rods.
Material
Solder-coated copper wire.
Nickel plated steel caps are force fitted and the termination
Strength
The terminations satisfy the requirements of
Construction
are welded to the caps. The value is obtained by
Terminations
wires
a
IEC 68.2.21.
Thin film material is sputtered onandhigh grade resistor body is protected
Material
Solder-coated copper wire.
helical cut in the film to finally the ceramic rods.
Nickel plated steel caps are force fitted andso that the terminations
by a cement protection applied the termination
Strength Solderability
The terminations requirements of
The terminations satisfy the meet the requirements of
wires are welded to the caps. The value is obtained by a
IEC
remain completely clear.
IEC 68.2.21. 115-1, Clause 4.17.3.2
helical cut in the film and finally the resistor body is protected
Solderability
The terminations meet the requirements of
by a cement protection applied so that the terminations
Solvent resistance
Marking
IEC 115-1, Clause 4.17.3.2
remain completely clear. resistors are colour coded with 5 bands.
The body protection and marking are resistant to all normal
1% tolerance
industrial cleaning fluids suitable for printed boards.
2% and 5% tolerance have 4. Band IEC 62 colours are used.
Construction
9.0
3.7
6.2
2.5
Terminations
Marking
Solvent resistance
1% tolerance resistors are colour coded with 5 bands.
2% and 5% tolerance have 4. Band IEC 62 colours are used.
General Note
The body protection and marking are resistant to all normal
industrial cleaning fluids suitable for printed boards.
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.
General Note
General Note Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
©
TT Electronics reserves the right to make changes in product specification without notice or liability.
Welwyn Components reserves the right to make changes in product specification without notice or liability.
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
All information is
is subject
TT
Welwyn’s own data and is
considered accurate at time of
of going to print.
All information
subject to
to
Electronics’ own data and is
considered accurate at time
going to print.
BI Technologies IRC Welwyn
A subsidiary of
www.ttelectronics.com/resistors
TT electronics plc
Issue E · 10.05
06.18
A subsidiary of
TT electronics plc
Issue E · 10.05
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT Electronics plc
1
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
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
Telephone: +44 (0) 1670 822181 · Facsimile:
changes
1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
TT Electronics reserves the right to make
+44 (0)
in product specification without notice or liability.
192
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
© 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:
Note
1670
Limited
Bedlington, Northumberland · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
General
+44 (0)
MH37
2500/box
BI Technologies
© 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
© TT Electronics plc
Packing
IRC
EIssue E · 10.05
Issue ·
Welwyn
10.05
Issue E · 10.05
06.18
www.ttelectronics.com/resistors
192
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