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Resistor Metal Element Current Sense SMT

This specific product line is not for new designs. Our RNC Series Current Sense resistors utilize a precision metal alloy element to control the high currents. These products are available in 3 standard EIA sizes for high volume SMT placement and are designed for high current low voltage applications. Resistances are available form 0.5 milliohms up 10 milliohms with power ratings up to 3 Watts. The compact design makes them a great choice for applications where size constraints and performance are critical.
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Electrical & Mechanical Characteristics

Package Code Power Rating (W) Resistance Value (Ω) L (Length) [mm] EB (End Bend) [mm] W (Width) [mm] T (Thickness) [mm]
RNC18
1
 0.5 3.20 ±0.25 1.35 ±0.25 1.60 ±0.10 0.60 ±0.20
0.75 3.20 ±0.25 1.23 ±0.25 1.60 ±0.10 0.60 ±0.20
1, 4, 5, 6 3.20 ±0.25 1.10 ±0.25 1.60 ±0.10 0.60 ±0.20
2, 3, 10 3.20 ±0.25 0.60 ±0.25 1.60 ±0.10 0.60 ±0.20
7, 8, 9 3.20 ±0.25 0.90 ±0.25 1.60 ±0.10 0.60 ±0.20
RNC19
1.5
 0.5 5.08 ±0.25 2.17 ±0.25 2.54 ±0.15 0.60 ±0.20
0.75 5.08 ±0.25 2.04 ±0.25 2.54 ±0.15 0.60 ±0.20
1 5.08 ±0.25 1.84 ±0.25 2.54 ±0.15 0.60 ±0.20
2, 6, 7, 8 5.08 ±0.25 1.54 ±0.25 2.54 ±0.15 0.60 ±0.20
3 5.08 ±0.25 1.04 ±0.25 2.54 ±0.15 0.60 ±0.20
4, 5 5.08 ±0.25 1.84 ±0.25 2.54 ±0.15 0.60 ±0.20
9, 10 5.08 ±0.25 1.29 ±0.25 2.54 ±0.15 0.60 ±0.20
RNC20
1
 0.5 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 1.25 ±0.20
0.75 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.75 ±0.20
1 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.65 ±0.20
1.5 6.35 ±0.254 1.30±0.38 3.18 ±0.254 0.45 ±0.20
2 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.35 ±0.20
2.5 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.65 ±0.20
3 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.55 ±0.20
4 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.45 ±0.20
5 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.35 ±0.20
6 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.32 ±0.20
6.5 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.30 ±0.20
7 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.27 ±0.20
10 6.35 ±0.254 1.30 ±0.38 3.18 ±0.254 0.25 ±0.20
RNC20
w/Green Coating
1 to 3
 0.5 6.35 ±0.25 2.68 ±0.25 3.00 ±0.20 0.60 ±0.20
0.75 6.35 ±0.25 2.48 ±0.25 3.00 ±0.20 0.60 ±0.20
1, 5, 6 6.35 ±0.25 1.93 ±0.25 3.00 ±0.20 0.60 ±0.20
1.5, 6.5, 7 6.35 ±0.25 1.43 ±0.25 3.00 ±0.20 0.60 ±0.20
2, 3 6.35 ±0.25 1.18 ±0.25 3.00 ±0.20 0.60 ±0.20
4, 4.5 6.35 ±0.25 2.18 ±0.25 3.00 ±0.20 0.60 ±0.20
8 to 15 6.35 ±0.25 1.18 ±0.25 3.00 ±0.20 0.60 ±0.20

Specifications

  Specification  
Test Black Coating Green Coating Test Method
Solderability 95% min. coverage 245 ±5°C for 3 seconds
Temperature Coefficient of Resistance As Spec. +25/-55/+25/+125/+25°C
Dry Heat ± 1.0% ± 1.0% at +170°C for 1000 hrs
Load Life
± 1.0%
± 1.0%
 70 ±2°C, Max. working voltage for 1000 hrs with
1.5 hrs “ON”and 0.5 hrs “OFF”
Short Time Overload ± 0.5% ± 1.0% 5x rated power for 5 seconds
Resistance to Soldering Heat ± 0.5% ± 1.0% 260 ±5°C for 10 seconds
Thermal Shock ± 0.5% ± (0.5% + 0.05Ω) -55°C ~ 150°C, 100 cycles

Note: Green coating cannot be used in solder bath

Packaging Information

Package Code RNC18 (Reel Size 1206) RNC19 (Reel Size 2010) RNC20 (Reel Size 2512)
Quantity 2000
Type Embossed Tape

* Moisture Sensitivity Level: MSL-1

Available Options (Consult Factory)

  • Special Testing Requirements

KEY FEATURES:

  • Resistances from 0.5 mOhm to 15 mOhm
  • Resistance Tolerances to ± 1%
  • Customized Resistance available
  • Power Rating up to 3 Watts
  • TCR's to ± 50 ppm/ºC
  • Available in sizes 1206 / 2010 / 2512
  • RoHS Compliant

APPLICATIONS:

  • Engine Sensors
  • Surge Protection
  • Data Recorders
  • Temperature Sensors

PRODUCT SUMMARY:
PRODUCT SERIES (RNC) POWER RATING (W) at 80ºC RESISTANCES (mΩ) TCR (ppm/ºC) TOLERANCES TEMPERATURE RANGE
RNC18A
1
0.5 - 10
 ± 50
± 200 (0.5 mΩ)
1%
3%
5%
-55ºC to +170ºC
RNC19B
1.5
0.5 - 10
 ± 50
± 100 (0.5 mΩ)
RNC20A 1
1
0.5, 0.75, 1, 1.5, 2, 11, 12, 13, 14, 15 ± 50
6, 6.5, 7 ± 75
4, 5, 10 ± 100
2.5, 3 ± 150
RNC20C 2
2
0.5, 0.75, 1, 1.5, 2, 6.5, 7, 8, 9, 10 ± 50
6, 6.5, 7 ± 75
4, 5, 10 ± 100
2.5, 3 ± 150
RNC20D 3 2.5 4, 4.5, 5, 6 ± 50
RNC20E 3
3
 0.5, 0.75 ± 100
1, 1.5, 2, 2.5, 3, 3.5 ± 50
Resistor Metal Element Current Sense SMT Calculation for Maximum operating voltage

1 11, 12, 13, 14, 15 mΩ - coating is green
2 6.5, 7, 8, 9, 10 mΩ at 50ppm - coating is green
3 All values contain green coating