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. 717-2008
BrandRS PRO
kr 0,015
Each (On a Reel of 5000)
Units
24.9Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-7098
BrandRS PRO
kr 0,012
Each (On a Reel of 10000)
Units
200Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-7127
BrandRS PRO
kr 0,007
Each (On a Reel of 10000)
Units
510Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 717-0834
BrandRS PRO
kr 0,01
Each (On a Reel of 5000)
Units
3.57kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 713-4239
BrandRS PRO
kr 0,015
Each (On a Reel of 5000)
Units
120kΩ 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-0872
BrandRS PRO
kr 0,01
Each (On a Reel of 5000)
Units
4.87kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 183-9545
BrandRS PRO
kr 0,006
Each (On a Reel of 10000)
Units
3.01kΩ 0402 (1005M) Thick Film ±1% 0.063W ±200ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 183-9558
BrandRS PRO
kr 0,007
Each (On a Reel of 10000)
Units
6.04kΩ 0402 (1005M) Thick Film ±1% 0.063W ±200ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 802-9832
BrandRS PRO
kr 0,025
Each (On a Reel of 5000)
Units
560kΩ 0603 (1608M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-4052
BrandRS PRO
kr 0,052
Each (On a Reel of 5000)
Units
4.7Ω 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-5801
BrandRS PRO
kr 0,047
Each (On a Reel of 5000)
Units
4.02kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-1790
BrandRS PRO
kr 0,072
Each (On a Reel of 1000)
Units
75kΩ Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 169-0319
BrandRS PRO
kr 0,081
Each (On a Reel of 3000)
Units
47kΩ Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 169-1695
BrandRS PRO
kr 0,18
Each (On a Reel of 1000)
Units
220kΩ Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 183-9626
BrandRS PRO
kr 0,141
Each (On a Reel of 4000)
Units
33Ω 2512 (6432M) Thick Film ±5% 1W ±100ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 717-5928
BrandRS PRO
kr 0,015
Each (On a Reel of 5000)
Units
10.2kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 802-9664
BrandRS PRO
kr 0,081
Each (On a Reel of 5000)
Units
4.3kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 169-0220
BrandRS PRO
kr 0,167
Each (On a Reel of 3000)
Units
12Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 804-6322
BrandRS PRO
kr 0,026
Each (On a Reel of 5000)
Units
33Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 804-7007
BrandRS PRO
kr 0,007
Each (On a Reel of 10000)
Units
10Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
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