Surface Mount Fixed Resistors

Resistors are referred to as a Passive Component. Surface Mount Resistors are more commonly known as SMD (surface mount device) or SMT (Surface mount technology) Resistors. These resistors offer advantages in space saving on Printed Circuit Boards (PCB’s).


Some common package sizes are 0201,0402,0603,0805,1206,1210,2020,2512


SMD Resistors are used in large volumes and are the preferred choice in electronics equipment due to their small size and high reliability. SMD resistors are particularly used in telecommunication, automotive (AEC Q200 qualified) and medical equipment, they also found in personal devices, displays and advanced technology research instruments.


SMD Fixed Resistors


Surface mount fixed resistors are the most widely used resistors as they reduce the flow of the electrical current in circuits. Similar to water flowing along a pipe, the tap controls the flow of water, a resistor controls the flow of current. They work to a fixed value the resistance does not change in temperature or voltage. The most commonly used fixed resistors values are 100KΩ,10kΩ,100Ω, 10Ω


Types of surface mount fixed resistors


  • Thin Film Resistors have a higher precision than the thick film

  • Thick Film Resistors are used for general use due to a lower price point.

  • Moulded Wirewound Resistors offer higher power

  • Foil Resistors for ultra-high precision and really low-Temperature coefficient of resistance

  • Shunts (current sense) Low ohmic values for where current measurement is critical

  • Melf (cylindrical) offering superb pulse load capability

What are surface mount fixed resistors used for?


SMD fixed resistors are very compact and used in most electronic board design. Due to their compact size and the continuous development of ever smaller footprints, this has allowed for the development of ever smaller PCB designs and the ability to get more from the board. The resistors can assist in the reduction of component count on the board.


High Power / Surge / pulse protection


Many manufacturers offer a higher power alternative for the various packages they have available. As an example the 0603 resistor package can vary from 0.1W to 0.25W (rated dissipation 70°C). The higher power alternatives can be used in applications where there is a need to protect against surges / pulses.


What is the difference between Thin Film Resistors and Thick Film Resistors?


The main difference being that the thick film resistors have a paste fired on to the manufacturers chosen substrate. Thin film resistors as the name suggests has an extremely thin metal film that is generally vacuum deposited on to the manufacturers chosen substrate.


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Description Price Resistance Package/Case Technology Tolerance Power Rating Temperature Coefficient Automotive Standard Dimensions Length Depth Height Series Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 809-8875
Mfr. Part No.RWS5 470R F B
BrandArcol
HK$8.73
Each
units
470 Ω - Wire Wound ±1% 5W ±20ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 172-2182
Mfr. Part No.RWS10 1R J
BrandArcol
HK$13.951
Each (In a Bag of 100)
units
1 Ω - Wire Wound ±5% 10W ±50ppm/°C - - - - - RWS -55°C +275°C
RS Stock No. 809-8878
Mfr. Part No.RWS5 R12 J B
BrandArcol
HK$8.56
Each
units
120 mΩ 0805 (2012M) Wire Wound ±5% 5W ±90ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 809-8761
Mfr. Part No.RWS5 R27 F B
BrandArcol
HK$8.73
Each
units
270 mΩ 0805 (2012M) Wire Wound ±1% 5W ±90ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 668-8331
Mfr. Part No.ACPP06031K0BE
BrandArcol
HK$2.654
Each (In a Pack of 5)
units
1 kΩ 0603 (1608M) Metal Film ±0.1% 0.063W ±25ppm/°C - - - - - ACPP -55°C +155°C
RS Stock No. 668-8325
Mfr. Part No.ACPP060316KBE
BrandArcol
HK$2.654
Each (In a Pack of 5)
units
16 kΩ 0603 (1608M) Metal Film ±0.1% 0.063W ±25ppm/°C - - - - - ACPP -55°C +155°C
RS Stock No. 809-8850
Mfr. Part No.RWS5 150R F B
BrandArcol
HK$8.73
Each
units
150 Ω - Wire Wound ±1% 5W ±20ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 809-8976
Mfr. Part No.RWS5 100R J B
BrandArcol
HK$8.56
Each
units
100 Ω - Wire Wound ±5% 5W ±20ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 668-8687
Mfr. Part No.ACPP080547RBE
BrandArcol
HK$4.004
Each (In a Pack of 5)
units
47 Ω 0805 (2012M) Metal Film ±0.1% 0.1W ±25ppm/°C - - - - - ACPP -55°C +155°C
RS Stock No. 172-2121
Mfr. Part No.ACPP080522KBE
BrandArcol
HK$2.173
Each (On a Reel of 5000)
units
22 kΩ 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - ACPP -55°C +125°C
RS Stock No. 809-8904
Mfr. Part No.RWS5 1R J B
BrandArcol
HK$8.56
Each
units
1 Ω - Wire Wound ±5% 5W ±50ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 172-2090
Mfr. Part No.ACPP060320KBE
BrandArcol
HK$1.497
Each (On a Reel of 5000)
units
20 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - ACPP -55°C +125°C
RS Stock No. 668-8592
Mfr. Part No.ACPP0805200RBE
BrandArcol
HK$4.024
Each (In a Pack of 5)
units
200 Ω 0805 (2012M) Metal Film ±0.1% 0.1W ±25ppm/°C - - - - - ACPP -55°C +155°C
RS Stock No. 809-8989
Mfr. Part No.RWS5 390R J B
BrandArcol
HK$8.56
Each
units
390 Ω - Wire Wound ±5% 5W ±20ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 809-8881
Mfr. Part No.RWS5 R22 J B
BrandArcol
HK$8.56
Each
units
220 mΩ - Wire Wound ±5% 5W ±90ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 809-8913
Mfr. Part No.RWS5 2R2 J B
BrandArcol
HK$8.56
Each
units
2.2 Ω - Wire Wound ±5% 5W ±50ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 781-1292
Mfr. Part No.RWS7 20R J
BrandArcol
HK$11.72
Each
units
20 Ω - Wire Wound ±5% 7W ±20ppm/°C - - - - - RWS -55°C +275°C
RS Stock No. 809-8838
Mfr. Part No.RWS5 39R F B
BrandArcol
HK$8.73
Each
units
39 Ω 0805 (2012M) Wire Wound ±1% 5W ±20ppm/°C - - - - - RWS -55°C +155°C
RS Stock No. 172-2137
Mfr. Part No.RWS7 R1 J
BrandArcol
HK$10.146
Each (In a Bag of 100)
units
100 mΩ - Wire Wound ±5% 7W ±90ppm/°C - - - - - RWS -55°C +275°C
RS Stock No. 172-2122
Mfr. Part No.ACPP0805300RBE
BrandArcol
HK$2.173
Each (On a Reel of 5000)
units
300 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - ACPP -55°C +125°C