Resistors
Metal
Precision
Film Resistors
Precision Metal Film Resistors
RC series
RC series
CECC released products with low TCRs over a wide resistance range
CECC released products with low
Resistance tolerance down to 0.05%
TCRs over a wide resistance range
Express delivery available
Resistance tolerance down to 0.05%
Low noise and negligible voltage coefficient
Express delivery available
Screened parts available for critical applications
Low noise and negligible voltage coefficient
Temperature Coefficient of Resistance down to 5 ppm/°C
Options for RoHS compliant and Lead bearing wire finishes
Screened parts available for critical
applications
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data
RC55
Commercial
Power rating at 70°C
Resistance range
Limiting element voltage
Isolation voltage
TCR (20 to +70°C)
Resistance tolerance
CECC 40101-004 Requirements
Power rating at 70°C
Resistance range
Limiting element voltage
Isolation voltage
TCR
Resistance tolerance
CECC 40101-804 Requirements
Power rating at 70°C
Resistance range
Limiting element voltage
Isolation voltage
TCR
Resistance tolerance
watts
ohms
volts
volts
ppm/°C
%
watts
volts
volts
ppm/°C
%
A
0.125
1R to 1M
200
280
B
0.25
1R to 1M
250
350
watts
ohm
volts
volts
ppm/°C
%
H
0.063
200
280
J
0.125
200
280
K
0.25
250
350
0.25
1R to 4M
350
500
0.5
1R to 4M
350
500
5, 10, 15, 25, 50, 100
0.05, 0.1, 0.25, 0.5 & 1
K
0.25
10R to 1M
250
350
15, 25, 50, 100
0.05, 0.1, 0.25., 0.5 & 1
B
0.25
10R to 1M
250
350
15, 25, 50, 100
0.05, 0.1, 0.25, 0.5 & 1
C
0.5
10R to 1M
350
500
See resistance
restrictions
L
0.5
10R to 1M
350
500
See resistance
restrictions
1.0
1R to 10M
500
700
See resistance
restrictions
RC65
RC70
Notes
ohms 1R to 1M 1R to 1M 1R to 1M
These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding RC series products.
Standard values
Thermal impedance
Ambient temperature range
°C/watt
°C
110
E24, E96 preferred
70
-55 to +155
60
Any value
to order
General
Note
General
Note
TT electronics reserves
the right to make changes in
in product specification without notice or liability.
TT Electronics reserves
the right to make changes
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
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
www.ttelectronics.com/resistors
© TT electronics plc
© TT Electronics plc
07. 11
05.18
Precision Metal
Precision Metal
Film Resistors
Film Resistors
RC series
RC series
Physical Data
Dimensions (mm) & Weight (g)
PCB
mounting
Type
RC55
RC65
RC70
L max
7.2
10.0
15.5
D max
2.5
3.7
5.5
f min
30
30
30
1
Min.
Bend
Radius
0.6
0.6
1.2
Wt. nom
0.24
0.40
1.15
d nom
0.6
0.6
0.8
centres
10.2
12.7
18.4
d
D
L
f
Note 1 - dimension relates only to bulk packed product.
Construction
A metal film is deposited onto a high quality ceramic former.
Nickel-plated steel caps are force fitted to the former and
termination wires are welded to the caps.
The resistor is adjusted to value by a helical cut in the film
and the body is protected with a specially formulated epoxy
coating.
Marking
Type reference, TCR code, resistance value and
tolerance code.
The resistance values conform to IEC 62.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Terminations
Material
Strength
Solderability
Solder coated copper wire
The terminations meet the requirements of
IEC 68.2.21.
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
Performance Data
CECC 40101-004 CECC 40101-804
Requirements
Load at commercial rating: 1000 hours at 70°C
Load at CECC rating: 1000 hours at 70°C
Dry heat: 1000 hours at 155°C
Shelf life: 12 months at room temperature
Derating from rated power at 70°C
Short term overload
Climatic
Climatic category
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise (in a decade of frequency)
Voltage coefficient of resistance
∆R%
∆R%
∆R%
∆R%
µV/V
ppm/V
∆R%
∆R%
∆
R%
∆R%
∆R%
∆R%
0.5
0.5
Not specified
Zero at 155°C
0.1
0.5
55/155/56
0.5
0.1
0.1
0.1
Not specified
Not specified
0.5
0.5
Not specified
50% at 125°C
0.1
0.5
55/125/56
0.5
0.1
0.1
0.1
Not specified
Not specified
Requirements
*Actual Performance
Maximum
0.3
0.3
**1.0
0.1
0.1
0.3
55/155/56
0.5
**0.2
0.06
0.06
1.0
0.1
0.05
0.03
0.02
0.1
<1
Typical
0.1
0.05
0.15
0.03
0.02
0.1
50% at 125°C & Zero at 155°C
Note:
*An 0.01 ohm addition to be added to the performance claims of all resistors <10R.
** All products within the specified approved range meet CECC requirements.
General Note
General Note
TT Electronics reserves the right to make changes in product specification without notice or liability.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
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.
© TT Electronics plc
© TT electronics plc
05.18
07. 11
Precision Metal
Precision Metal
Film Resistors
RC series
RC series
Film Resistors
Table of Resistance Restrictions
Tolerance
TCR
ppm/°C
5
1
10
15
25
50
100
2
2
RC55
0.05%
10R to 1M
10R to 1M
10R to 1M
10R to 1M
10R to 1M
0.1 - 0.25%
10R to 1M
2R49 to 1M
2R49 to 2M
2R49 to 2M
1R to 2M
0.5%
3
- 1%
3
1R to 500K
1R to 1M
1R to 1M
1R to 2M
1R to 4M
1R to 4M
0.05%
10R to 1M
10R to 1M
10R to 1M
10R to 1M
10R to 1M
10R to 500K 10R to 500K
RC65
0.1 - 0.25%
10R to 1M
5R to 1M
5R to 2M
5R to 2M
1R to 2M
0.5%
3
- 1%
3
1R to 500K
1R to 1M
1R to 1M
1R to 2M
1R to 4M
1R to 4M
0.05%
10R to 1M
10R to 1M
10R to 1M
10R to 1M
10R to 1M
10R to 500K 10R to 500K
RC70
0.1 - 0.25% 0.5%
3
- 1%
3
10R to 1M
10R to 2M
10R to 5M
5R to 10M
1R to 10M
1R to 1M
1R to 2M
1R to 5M
1R to 10M
1R to 10M
10R to 750K 10R to 750K 10R to 750K
Note1:
1. Based on sampling. 100% screened product is available.
2. For maximum availability, where the ohmic value permits, 25ppm/˚C is preferred to 50 or 100ppm/˚C.
3. For maximum availability, where the ohmic value permits, 0.25% is preferred to 0.5% or 1%
Application Notes
Matched Sets and Networks
TT electronics has many years experience in the supply of
matched set of precision resistors.
Resistors can be supplied matched for tolerance and TCR
down to ±0.02% and ±2ppm/°C, either as separate resistors
or pre-assembled and encapsulated within a plastic box.
The individual resistors within a set or module can be
manufactured with a tolerance of ±0.05% and TCR of
±5ppm/°C.
Packaging
RC55 and RC65 standard packing is in tape, as shown below,
whilst RC70 is bulk packed. Taped resistors on reel or loose
packed components can also be supplied by special request.
5
f
1
6
52
f
2
6
A low inductance version is available in the range
5R0 to 1K0 at 1% tolerance. For low inductance
version add suffix N.
Body location f
1
– f
2
≤
1.4 mm
General
Note
General
Note
TT Electronics
TT electronics reserves
the right to make changes in
in product specification without notice or liability.
the right to make changes
product specification without notice or liability.
All
information
is subject to TT Electronics’ own data and is considered accurate at time
time of going to print.
information
is subject to TT electronics’ own data and is considered accurate at
of going to print.
All
BI Technologies IRC Welwyn
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
www.ttelectronics.com/resistors
© TT Electronics plc
© TT electronics plc
05.18
07. 11
Precision Metal
Film Resistors
RC series
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: RC55V-31K6BI
(RC55 with TCR ±5ppm/°C at 31.6 kilohms ±0.1%, Pb-free)
Ordering Procedure
R C 5 5 V
-
3
This product has two valid part numbers:
1
2
1
3
K
6
B
4
I
5
European (Welwyn) Part Number: RC55V-31K6BI
(RC55 with TCR ±5ppm/°C at 31.6 kilohms ±0.1%, Pb-free)
1
2
R C 5 5 V
Type TCR (ppm/°C)
1
2
RC55
V = ±5
RC65
T = ±10
1
RC70
Y =
2
±15
Type TCR (ppm/°C)
D = ±25
C = ±50
RC55
V = ±5
Z = ±100
RC65
T = ±10
RC70
3
1 K 6
Value
3
E24 = 3/4 characters
E96 = 4/5 characters
3
R = ohms
K = kilohms
Value
M = megohms
E24 = 3/4 characters
E96 = 4/5 characters
R = ohms
K = kilohms
M = megohms
-
3
4
5
B
I
Tolerance
Finish, Screening & Packing
4
5
W = ±0.05% I
Pb-free (RoHS)
B = ±0.1% SC Pb-free with screened TCR (5ppm only)
4
5
C = ±0.25% PB
Sn(95)Pb(5) finish
Tolerance
HL
Finish, Screening & Packing
D = ±0.5%
Sn(60)Pb(40) high lead finish
All above in Standard Packing
WF = ±1%
= ±0.05% I
Pb-free (RoHS)
RC55
Up to (5ppm only)
B = ±0.1% SC Pb-freeAmmo
with screened TCR5000/box
RC65
Up to 2500/box
C = ±0.25% PB
Sn(95)Pb(5) finish
RC70
Bulk
250/box
D = ±0.5% HL
Sn(60)Pb(40) high lead finish
Y = ±15
D = ±25
C = ±50
F = ±1%
All above
For CECC released product state on order the CECC number and style. Example:
RC55Y-31K6BI CECC40101-004 JY
in Standard Packing
For CECC 40101-804 the TCR
= ±100
and E relate to 15 and 25ppm/°C and are coded in the MPN as Y and D respectively. Also an additional
Z
codes T
RC55
Up to 5000/box
Ammo
suffix -804 is added after the Finish, Screening & Packing code, and, in the case of Pb-free, this code (I) is omitted. Example:
RC65Y-31K6B-804 CECC 40101-804BT
RC65
USA (IRC) Part Number: RC55LFV3162BA
(RC55 with TCR ±5ppm/°C at 31.6 kilohms
Up to 2500/box
±0.1%, Pb-free)
RC70
Bulk
250/box
R
C
1
5
5
L
2
F
V
3
3
1
4
6
2
B
5
A
6
USA (IRC) Part Number: RC55LFV3162BA
(RC55 with TCR ±5ppm/°C at 31.6 kilohms ±0.1%, Pb-free)
1
2
3
R C 5 5 L F V 3 1
Type Termination TCR (ppm/°C)
1
2
3
RC55
Omit for
V = ±5
RC65 Sn(95)Pb(5)
T = ±10
1
2
RC70 LF = Pb-free
Y =
3
±15
Type Termination TCR (ppm/°C)
D = ±25
C = ±50
RC55
Omit for
V = ±5
Z = ±100
RC65 Sn(95)Pb(5)
T = ±10
RC70 LF = Pb-free
Y = ±15
D = ±25
C = ±50
Z = ±100
4
5
2 B A
Value
Tolerance
4
5 6
3 digits + multiplier A = ±0.05%
RC55
A
B = ±0.1%
RC65
R = ohms for
4
5
values <100 ohms C = ±0.25% B RC70
Value
Tolerance
D = ±0.5%
3 digits + multiplier A F = ±1%
= ±0.05%
RC55
A
B = ±0.1%
RC65
R = ohms for
values <100 ohms C = ±0.25% B RC70
D = ±0.5%
F = ±1%
6
6
Packing
Ammo, up to 5000/box
Ammo, up to 2500/box
6
Bulk, 250/box
Packing
Ammo, up to 5000/box
Ammo, up to 2500/box
Bulk, 250/box
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
05.18
Switching Power Supply Study Group
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