Resistors
Resistors
High Power MELF Resistors
Power
MELF Resistors
High Voltage
MELF Resistors
WRM-HP Series
WRM-HV
Series
WRM-HP
WRM-HV Series
AEC-Q200 qualified
High limiting element voltage up to 1kV
High limiting element voltage up to 1kV
AEC-Q200 qualified
1W
High power up to
1.2/50µs surge voltage to 6kV
1.2/50µs surge voltage to 6kV
High power up to 1W
±0.1%
Tolerance down to
Tolerance down to ±0.1%
Tolerance down to ±0.1%
Tolerance down to ±0.1%
TCR down to ±15ppm/°C
TCR down to ±25ppm/°C
TCR down to ±25ppm/°C
TCR down to ±15ppm/°C
High pulse handling capability
High pulse handling capability
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data
Electrical Data
Electrical Data
Resistance range
Resistance range
Maximum overload
Limiting element voltage
Limiting element voltage
voltage
TCR
Maximum overload voltage
Maximum overload voltage
TCR
TCR
Resistance tolerance
Resistance tolerance
Resistance tolerance
Standard values
Standard values
Standard values
Thermal impedance
Thermal impedance
Thermal impedance
Ambient temperature range
Ambient temperature range
Ambient temperature range
Insulation resistance
Insulation resistance
Insulation resistance
Voltage
Voltage proof
Voltage proof
proof
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
WRM0204HP
WRM0204HV
WRM0204HP
WRM0204HV
watts
watts
ohms
ohms
volts
volts
volts
volts
ppm/°C
ppm/°C
%
%
°C /W
°C /W
°C
°C
ohms
ohms
volts
volts
WRM0207HP
1
WRM0207HV
WRM0207HP
WRM0207HV
1
1
Power rating at 70°C
Resistance range
Power rating at 70°C
Power rating at 70°C
Limiting element voltage
watts
ohms
0.4
0.4
volts
0.4
R10 – 1M0
200
400
340K –
1M0
R10
3M4
340K – 3M4
350
700
volts
500
200
500
ppm/°C
1000
400
1000
15, 25, 50, 100
1000
350
1000
15, 25, 50,
700
100
2000
2000
25, 50
15,
%
50, 100
25,
25, 50
0.25, 0.5, 1,
15, 25, 50, 100
0.1,
5
≤1M0: 0.1,
0.25, 0.5, 1
&
1, 5
0.25, 0.5, 1
>1M0: 0.5, 1
≤1M0: 0.1,
0.1, 0.25, 0.5,
E96
E24
>1M0: 0.5, 1
E24 & E96
°C /W
200
E24 & E96
140
200
140
200
140
°C
-55 to +155
-55 to +155
-55 to +155
10
ohms
>10
10
>10
10
>10
284
497
1420
volts
710
1420
284
497
710
Physical Data
Physical Data
Dimensions (mm) and weight (g)
Dimensions (mm) and weight (g)
Dimensions (mm) and weight (g)
Type
Type
Type
WRM 0204HV
0204HP
WRM 0204HV
WRM 0204HP
WRM 0207HV
0207HP
WRM 0207HV
WRM 0207HP
L
L
L
L
max
max
max
max
3.7
3.7
3.7
3.7
6.1
6.1
6.1
6.1
D
D
D
D
max
max
max
max
1.55
1.55
1.55
1.55
2.4
2.4
2.4
2.4
D1
D1
max
max
1.55
1.55
2.4
2.4
L
L
K
K
L
min
min
min
min
1
1
D1
D
1
max
max
1.55
1.55
2.4
2.4
K
K
min
min
0.7
0.7
1.2
1.2
Weight
Weight
Weight
Weight
0.02
0.02
0.02
0.02
0.08
0.08
0.08
0.08
0.7
0.7
1.2
1.2
1.5
1.5
2.9
2.9
D
1
L
1
K
D
Construction
A metal film is deposited onto a high dissipation
A metal film is deposited onto a high dissipation ceramic former to which
A metal film is deposited onto a high dissipation ceramic former to which
ceramic former
are fitted.
tin plated terminating caps
to which tin plated terminating
tin plated terminating caps are fitted.
caps are fitted.
Construction
Construction
Terminations
Terminations
Terminations
Material
Plated steel cap.
Material
Plated steel cap.
steel cap.
Plated
Material
The resistor is adjusted to value by a helical cut in the film and the body is
The resistor is adjusted to value by a helical cut in the film and the body is
The resistor is adjusted to value by a helical cut in the film
protected by a lacquer coating.
protected by a lacquer coating.
and the body is protected by a lacquer coating.
Solderability
The pure tin finish produces ageing
which
Solderability
The pure tin finish produces ageing free contacts on
which
Solderability
The pure tin finish produces ageing free contacts on
free
low melting solders
can be used. Dipped area
solders
low melting solders
on which low melting
shall be
can
contacts
can be used. Dipped area shall be
covered with
a smooth and bright
solder coating after
covered with
used. Dipped area
solder coating after
with
be
a smooth and bright
shall be covered
3 seconds immersion at 215°C.
3 seconds immersion at 215°C.
Marking
Marking
Marking
Resistance values
are colour coded
with three
with three or
indicating
Resistance values
values are
coded
with three or four bands, indicating
Resistance
are colour
colour coded
or four bands,
four
value
and multiplier.
value
and multiplier.
bands, indicating value and multiplier.
Solvent Resistance
Solvent Resistance
a smooth and bright solder coating after
3 seconds immersion at 215°C.
The
body protection and marking
are resistant to all normal industrial
body protection and marking
The
Solvent Resistance
are resistant to all normal industrial
cleaning solvents suitable for
printed circuit
boards.
The body protection
printed circuit
are resistant to all normal
cleaning solvents suitable for
and marking
boards.
industrial cleaning solvents suitable for printed circuit boards.
General Note
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
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.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
BI Technologies IRC Welwyn
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
www.ttelectronics.com/resistors
© TT Electronics plc
© TT Electronics plc
09.17
03.17
06.18
03.17
High Power MELF Resistors
WRM-HP Series
WRM-HP Series
High Voltage
High Voltage
MELF Resistors
MELF Resistors
WRM-HV Series
WRM-HV Series
1000
Peak Voltage (V)
100
Dera ng Curve
Pulse Voltage
0207
Dera ng Curve
0207
0204
0207
0204
Performance Data
0204
10
Short time overload: 5s at lesser of 6.25 x rated power or 2 x LEV
Short time overload: 5s at lesser of 6.25 x rated power or 2 x LEV
Damp heat with load: 1000hrs 40±2°C/90-95%RH cyclic rated power
Damp heat with load: 1000hrs 40±2°C/90-95%RH cyclic rated power
1
0.0001
0.001
0.1
High temperature exposure: 1000hrs at
0.01
High temperature exposure: 1000hrs at
155°C
155°C
Pulse Dura on (s)
Bending test: 2mm deflection for 60s
Bending test: 2mm deflection for 60s
High Power
heat: 260±5°C for 10s
Resistance to soldering
MELF Resistors
Resistance to soldering
heat: 260±5°C for 10s
High Power
Temperature rapid change: 1000cycles -55/125°C
WRM-HP Series
Lightning
Temperature rapid change: 1000cycles -55/125°C
Surge Performance
Endurance:
MELF
rated power at 70°C
Endurance:
1000hrs
rated power at 70°C
1000hrs
Resistors
Solderability: 245±5°C for 3s
Solderability: 245±5°C for 3s
Lightning Surge Performance
Resistors
High Power MELF
WRM-HP
Voltage proof: 1.42 x LEV
Series
Voltage proof: 1.42 x LEV
1
Lightning Surge Performance
WRM-HP Series
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
±ΔR%
Maximum (+0.05Ω)
Maximum (+0.05Ω)
0.15
0.15
1
1
1
1
0.5
0.5
0.25
0.25
1
1
1
1
>95% coverage
>95% coverage
No breakdown or flashover
No breakdown or flashover
1.2/50µs Lightning Surge
10,000
0207
0207
0204
10,000
Dera ng Curve
10/700µs Lightning Surge
0207
0207
0204
0204
Pulse Voltage
Peak Voltage (V)
1,000
1000
Peak Voltage (V)
0207
Pulse Performance
Pulse Performance
0204
0207
1,000
Dera ng Curve
Derating Curve
0207
Peak Voltage (V)
100
Limits for ΔR are ±0.5%
Limits
100
ΔR are ±0.5%
for
0204
Peak surge voltage
Peak surge voltage
1.2/50µs
1.2/50µs
10
10/700µs
10/700µs
100
1
0.0001
0207
0204
0207
0204
WRM0204HV
WRM0204HV
0204
4.5kV
4.5kV
2.2kV
2.2kV
WRM0207HV
WRM0207HV
6kV
6kV
3kV
3kV
100,000
0.1
100
0204
10
10
10
1,000
0.001
10,000
0.01
1,000,000
1
10
100
1,000
10,000
100,000
1,000,000
Value (ohms)
Value (ohms)
Pulse Dura on (s)
Lightning Surge Performance
Ordering
Procedure
Ordering
Lightning Surge Performance
Procedure
Ordering
Procedure
Lightning Surge Performance
Example: WRM0204HPC-2K49FT3
(WRM0204HP, 50ppm/°C,
50ppm/°C,
±1%, Pb-free)
Example: WRM0204HPC-2K49FT3
(WRM0204HP, 50ppm/°C, 2.49
kilohms
±1%, Pb-free)
Example: WRM0204HPC-2K49FT3
(WRM0204HP,
2.49 kilohms
2.49
kilohms
±1%, Pb-free)
Example: WRM0204HVC-1M0FT3 (WRM0204HV, 50ppm/°C, 1 megohm ±1%, Pb-free)
Example: WRM0204HVC-1M0FT3 (WRM0204HV, 50ppm/°C, 1 megohm ±1%, Pb-free)
Ordering Procedure
W
R
W
M
R
0
M
2
1
0
0
2
10,000
1
4
Lightning
C
0
1.2/50µs
H P
Surge
-
4
H
V
C
2
2
3
-
0207
2
0207
0204
0204
1
M
K
3
4
3
0
4
9
F
4
F
4
T
T
3
5
3
10/700µs Lightning Surge
10,000
0207
0207
0204
5
0207
Peak Voltage (V)
Peak Voltage (V)
2
TCR
3
Value
4
5
Tolerance
Packing
Type
TCR
Value
Tolerance
T3 0204 3000 / 7” reel
0204
Packing
0204
WRM0204HP Y = ±15ppm/°C
3/4 characters B = ±0.1%
100
100
C = ±0.25%
T3 0204
2000 /
/ 7” reel
WRM0207HP D = ±25ppm/°C
T2 0207
3000
7” reel
R = ohms
B = ±0.1%
WRM0204HV D = ±25ppm/°C
3/4 characters
K = kilohms
C
D = ±0.5%
T2 0207 2000 / 7” reel
C = ±50ppm/°C
= ±0.25%
WRM0207HV C = ±50ppm/°C
K = kilohms
10
10
Z = ±100ppm/°C
=
M = megohms F = ±1%
M megohms D
100,000
10
100
1,000
10,000
= ±0.5%
10
100
1,000
10,000
1,000,000
J = ±5%
Value (ohms)
Value (ohms)
F = ±1%
Type
1
1
1,000
2
0207
1,000
5
0204
100,000
1,000,000
Ordering
Procedure
Ordering Procedure
Ordering
Procedure
Example: WRM0204HPC-2K49FT3
(WRM0204HP, 50ppm/°C, 2.49 kilohms
2.49
kilohms
±1%, Pb-free)
Example: WRM0204HPC-2K49FT3
(WRM0204HP, 50ppm/°C, 2.49
kilohms
±1%, Pb-free)
Example: WRM0204HPC-2K49FT3
(WRM0204HP, 50ppm/°C,
±1%, Pb-free)
General Note
W
R
W
M
R
0
M
2
1
0
0
2
1
4
0
4
H
H
V
P
C
2
C
2
3
-
-
1
2
M
K
3
4
3
0
4
9
F
4
F
4
T
T
3
5
3
5
03.17
BI Technologies IRC Welwyn
All in formation is su bject to TT Electronics’ own da ta and is considered accu rate at time of going to print.
3/4 characters B = ±0.1%
C = ±0.25%
D = ±25ppm/°C
WRM0207HP
±25ppm/°C
R = ohms
B = ±0.1%
WRM0204HV D =
3/4 characters
K = kilohms
C
D = ±0.5%
C = ±50ppm/°C
General Note
WRM0207HV C = ±50ppm/°C
= ±0.25%
General Note
K = kilohms
M
Z
TT Electronics reserves the right to make changes
=
in
product specification
= megohms
or liability.
TT Electronics reserves the right to make changes
in
±100ppm/°C
= megohms D
or liability.
product specification
without notice
F = ±1%
without notice
= ±0.5%
M
All information is subject to TT Electronics’ own data and is considered accurate at time of
J
going
to print.
= ±5%
All information is subject to TT Electronics’ own data and is considered accurate at time of
going
to print.
1
Type
2
TCR
© TT Electronics plc
Type
TCR
WRM0204HP Y = ±15ppm/°C
1
2
Value
3
Value
Tolerance
4
Tolerance
Packing
T3 0204 3000 / 7” reel
T2 0207
3000
7” reel
T3 0204
2000 /
/ 7” reel
5
Packing
5
www.t telectronics.com/resistors
03.17
03.17
T2 0207 2000
BI Technologies
/ 7” reel
BI Technologies
IRC Welwyn
IRC Welwyn
F = ±1%
www.ttelectronics.com/resistors
www.ttelectronics.com/resistors
© TT Electronics plc
© TT Electronics plc
09.17
06.18
Mouser Electronics
Authorized Distributor
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:
WRM0207HVC-360KFT2 WRM0207HVC-560KFT2 WRM0204HVC-1M6FT3 WRM0204HVC-1M8FT3
WRM0207HVC-1M1FT2 WRM0204HVC-750KFT3 WRM0204HVC-2M2FT3 WRM0207HVC-3M3FT2 WRM0204HVC-
680KFT3 WRM0207HVC-510KFT2 WRM0207HVC-1M0FT2 WRM0207HVC-1M2FT2 WRM0204HVC-620KFT3
WRM0204HVC-1M0FT3 WRM0204HVC-1M5FT3 WRM0204HVC-2M4FT3 WRM0207HVC-1M8FT2 WRM0204HVC-
1M3FT3 WRM0207HVC-3M0FT2 WRM0207HVC-1M3FT2 WRM0204HVC-820KFT3 WRM0207HVC-2M2FT2
WRM0207HVC-390KFT2 WRM0207HVC-430KFT2 WRM0204HVC-360KFT3 WRM0207HVC-2M4FT2
WRM0204HVC-2M7FT3 WRM0207HVC-910KFT2 WRM0204HVC-390KFT3 WRM0204HVC-470KFT3
WRM0204HVC-510KFT3 WRM0207HVC-750KFT2 WRM0204HVC-910KFT3 WRM0207HVC-820KFT2
WRM0204HVC-1M2FT3 WRM0207HVC-680KFT2 WRM0204HVC-3M3FT3 WRM0204HVC-1M1FT3 WRM0207HVC-
470KFT2 WRM0204HVC-560KFT3 WRM0207HVC-620KFT2 WRM0204HVC-3M0FT3 WRM0204HVC-430KFT3
WRM0207HVC-1M6FT2 WRM0207HVC-590KFT2 WRM0207HVC-2M0FT2 WRM0207HVC-1M5FT2 WRM0204HVC-
2M0FT3
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