Flameproof
Resistors
MFP Series
Power
Metal Film Resistors
Flameproof Power
Metal Film Resistors
•
Smallest size for power rating
MFP Series
•
Resistance range 0.1 ohms to 1M ohms
Smallest size for power rating
•
Flameproof protection
Resistance range 0.1 ohms to 1M ohms
Flameproof protection
Surface mount ZI-form option
Welwyn Components
All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
MFP1
Power rating at 70°C
Resistance range
Limiting element voltage
TCR
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
°C/watt
°C
120
-55 to 155
watts
ohms
volts
ppm/°C
%
< 1
Ω:
300
1
Ω
- 9.1
Ω:
200
<1
Ω:
0.7
>=1
Ω:
1.0
350
≥10 Ω:
100
1, 2, 5
E24 preferred
82
100
0R1 – 1M
MFP2
2
1R0 – 1M
Physical Data
Dimensions (mm) & Weight (g)
PCB
Type
MFP1
MFP2
L Max
6.2
10.0
D Max
2.5
4.0
f min
21.0
27.0
d nom
0.6
0.8
mounting
centres
10.2
18.4
15
Min.
bend
radius
0.6
1.2
Wt.nom
0.3
0.55
d
D
L
f
Construction
The resistance element is a precisely controlled thin film of
metal alloy on a high purity ceramic core, protected by a
cement coating applied so that terminations remain
completely clear. This permits a well defined body length
(clean lead to clean lead dimension L).
Marking
Resistors are colour coded with 4 or 5 bands depending on
value and tolerance. IEC 62 colours are used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Terminations
Material
Strength
Solder-coated copper wire.
The terminations meet the requirements of
IEC 68.2.21
Flammability
The resistor coating will not burn or emit incandescent
particles under any condition of applied temperature or
power overload.
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
General Note
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
product specification without notice
of going
TT Electronics reserves the right to make changes in
and is considered accurate at time
or liability.
to print.
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
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
BI Technologies IRC
A
Welwyn
subsidiary of
TT electronics plc
www.ttelectronics.com/resistors
Issue D · 03.06
11.20
© TT Electronics plc
143
Flameproof Power
Flameproof Power Metal Film Resistors
Metal Film Resistors
Flameproof Power
MFP Series
Resistors
MFP Series
Metal Film
MFP Series
Welwyn Components
Welwyn Components
Performance Data
Performance Data
Load at rated power : 1000 hours at 70°C
Shelf life : 12 months at room temperature
Load at rated power : 1000 hours at 70°C
Derating from rated power at 70°C
Shelf life : 12 months at room temperature
Climatic
Derating from rated power at 70°C
Climatic category
Climatic
Temperature rapid change
Climatic category
Resistance to solder heat
Temperature rapid change
Voltage proof
Resistance to solder heat
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
∆
R %
volts
∆
R %
volts
Maximum
5
Maximum
2
5
zero at 155°C
2
3
zero at 155°C
50/155/56
3
0.5
50/155/56
0.5
0.5
500 min
0.5
1. soldered closer are to4mm from the body.
If the resistors than dissipate full rated power, it is
recommended that the terminations should not be
shown in Figure 1.
soldered closer than 4mm from the body.
The standard taping method and critical dimensions are
2. Due to operating temperature limitations imposed by some
shown in Figure 1.
pcb materials, derating may be necessary. An estimate of
Component wires will not protrude beyond the outside edge
2. the temperature rise to be expected can be calculated some
Due to operating temperature limitations imposed by
of the tapes.
pcb materials, derating may figures given under Electrical
Component wires will not protrude beyond the outside edge
using the thermal impedancebe necessary. An estimate of
the temperature rise to be expected can be calculated
of the tapes.
Data.
Alternative packaging available by request.
using the thermal impedance figures given under Electrical
Data.
3.
MFP2
products
can
also available in a
loose packed with radial,
Alternative packaging available
leads - see
These
resistors
are
also be supplied
range of lead forming
goalpost or lancet pre-formed
by request.
options. In particular, MFP2 is available in ZI-form SMD
https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/ApplicationNotes/TN008-resistors-Leadform-Capability.pdf,
format packed are also tape - see:
3.
or in ZI-form SMD
blister available in a
blister tape - see
These products in
format packed in
range of lead forming
http://www.ttelectronicsresistors.com/pdf/datasheet/ZI-form.pdf
options. In particular, MFP2 is available in ZI-form SMD
https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/Datasheets/ZI-form.pdf
format packed in blister tape - see:
Figure 1
http://www.ttelectronicsresistors.com/pdf/datasheet/ZI-form.pdf
Type
MFP1
MFP2
b
(mm)
Type
b
(mm)
52
MFP1
52
68
MFP2
68
Application Notes
1. If the resistors are to
Notes
rated power, it is
dissipate full
Application
the terminations should not be
recommended that
Voltage proof
Packaging
500 min
MFP resistors are normally supplied tape packed ready for
Packaging
loading onto automatic sequencing and insertion machines.
MFP resistors are normally supplied tape packed ready for
loading onto automatic sequencing and insertion machines.
The standard taping method and critical dimensions are
Figure 1
5
5
f
1
6
f
2
Ordering Procedure
Body location f
Example: MFP2 at 4.7 kilohms and 1% tolerance in ammo pack box of 2000 pieces
–
Ordering Procedure
Type
Value (use IEC62 code)
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
1%
G 2%
Tolerance (use IEC62 code)
J
F 5%
1%
G 2%
J
5%
Packing
MFP1
5000/box
I
Ammo
MFP2
2000/box
Packing
MFP1
5000/box
I
Ammo
MFP2
2000/box
b
6
f
1
f
2
Body location f
1
– f
2
≤
1.4 mm
b
6
6
1
– f
2
≤
1.4 mm
M F P
box
K 7 F
I
Example: MFP2 at 4.7 kilohms and 1% tolerance in ammo pack
2
–
4
of 2000 pieces
–
Type
MFP2
–
4K7F
I
Standard
Standard
General Note
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
144
144
All information is
Components Limited
data and is considered accurate
NE22 7AA,
going to print.
© Welwyn
subject to TT Electronics’ own
Bedlington, Northumberland
at time of
UK
Telephone: +44 (0) 1670
right to make changes in product specification without
info@welwyn-tt.com · Website: www.welwyn-tt.com
TT Electronics reserves the
822181 · Facsimile: +44 (0) 1670 829465 · Email:
notice or liability.
BI Technologies IRC
Issue D · 03.06
Welwyn
www.ttelectronics.com/resistors
Issue D · 03.06
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT Electronics plc
11.20
Flameproof Power Metal Film Resistors
1
2
3
4
5
U
L
4. ULW resistors can also be supplied with radial, goalpost or lancet pre-formed leads. In particular ULW2, ULW3, ULW4 and
ULW5 are available in ZI-form SMD format packed in blister tape – see
(This diagram exists on WP-S,
W
http://www.ttelectronics.com/sites/default/files/resistors-datasheets/ZI-form.pdf
P 2 R -
3 3 R J T 1 5
so just copy it)
MFP Series
Type
Leadforming
1
2
3
Value
4
Tolerance
J = ±5%
5
Packing
T15 Tape & reel, 1500/reel
Also a 2W radial taped version is available as shown below
Dimension
Also a 2W radial taped version* is available as shown below.
MFP2R Radial Taped Dimensions (mm)
Notation Nominal
Tolerance
ULWP2R Radial Taped Dimensions (mm)
ULWP2 R = Radial taped 3/4 characters
R = ohms
WHS ADDITIONAL
Component Body Length
Dimension
Component
10.0 Max
Component Body Diameter
Body Length
D
L
4.0 Max
Component
4.0 Max
Terminal Lead Diameter
Body Diameter
d
D
0.8 Nom
Terminal Lead Diameter
d
0.8 Nom
Component Pitch
P
12.7
±0.5
Example: WHSP2R-100RJT15
(WHSP2R radially formed & taped, 100 ohms ±5%, Pb-free)
Component Pitch
P
5
±0.5
Pitch of Holes
Po
12.7
±0.2
Pitch of Holes
Po
10
±0.2
P1
3.85
±0.3
P1
3.85
±0.3
Distance between Hole & Component
&
Distance between Hole
W H S
Component
R -
P 2
1
P2
0 0
5.85
R J
±0.5
T 1 5
5.85
P2
±0.5
Lead Pitch
1
Lead Pitch
F
F
3
5.0
+0.75 -0.34
5
5.0
+0.75 -0.34
2
4
Width of Backing Strip
of Backing Strip
W
18.0
±0.3
Width
W
18.0
±0.3
Position of Hole
Position of Hole
W1
9.0
±0.25
W1
9.0
±0.25
1
2
3
4
±0.3
5
Diameter of Hole
Do
4.0
Diameter of Hole
Do
4.0
±0.3
Height
Ho
16.0
±0.3
Type
Leadforming
Value
Tolerance
Packing
Ho
16.0
±0.3
Height to Lead Form
to Lead Form
Height
Ho1
17.0 MAX
Height from Lead Form
from Lead Form
Ho1
21.7 Max
WHSP2 R = Radial taped 3/4 characters
MIN
= ±1% T15 WHSP2R Tape & reel 1500/reel
Height to Resistor
Ho2
18.0
F
R = ohms
18.0 Max
Height to Resistor
Ho2
Width of Adhesive Tape
W2
15.0
±0.5
Width of Adhesive Tape
W2
15.0
= ±2%
±0.5
A2
WHS3
G
Ammo pack 2000/box
Length of protrusion
l
<2.5
WHS3R
Length of protrusion
l
<2.5
J = ±5%
Tape & reel 1000/reel
K1
2.0
±0.3
T1
K1
2.0
±0.3
K2
3.0
±0.5
Form Dimensions
K2
3.0
±0.5
K3
1.5
±0.25
Form Dimensions
K3
1.5
±0.25
K4
1.0
±0.2
*Although body dimensions differ
K4
slightly, ULWP2R Performance and Electrical Data are identical to those of ULW2
1.0
±0.2
L
Notation
10.0 Max
Nominal
Tolerance
MFP REPLACEMENT
Ordering Procedure
M
F
1
1
Type
MFP1
MFP2
2
Leadforming
P
2
2
3
Value
-
4
K
3
Example: MFP2-4K7FI
(MFP2, 4.7 kilohms ±1%, Pb-free)
Pb-free)
(MFP2, 4.7 kilohms ±1%,
Example: MFP2-4K7FI
7
F
4
4
Tolerance
F = ±1%
G = ±2%
J = ±5%
MFP1
MFP2
T15 MFP2R
I
I
5
5
Packing
Ammo
Reel
5000/box
2000/box
1500/reel
Blank = Axial
3/4 characters
R = ohms
R = Radial taped
(MFP2 only)
K = kilohms
M = megohms
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
11.20
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