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. 717-3221
BrandRS PRO
SGD0.003
Each (On a Reel of 5000)
units
274kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 716-7706
BrandRS PRO
SGD0.004
Each (On a Reel of 15000)
units
1.8kΩ 0201 (0603M) Thick Film ±1% 0.05W ±200ppm/°C - - - - - RS -55°C +125°C
RS Stock No. 804-6411
BrandRS PRO
SGD0.004
Each (On a Reel of 5000)
units
510Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 717-5924
BrandRS PRO
SGD0.004
Each (On a Reel of 5000)
units
9.76kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 717-5435
BrandRS PRO
SGD0.005
Each (On a Reel of 5000)
units
249Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-7057
BrandRS PRO
SGD0.002
Each (On a Reel of 10000)
units
47Ω 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 183-9616
BrandRS PRO
SGD0.042
Each (On a Reel of 4000)
units
1kΩ 2512 (6432M) Thick Film ±5% 1W ±100ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 717-2654
BrandRS PRO
SGD0.003
Each (On a Reel of 5000)
units
3.48kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 183-9621
BrandRS PRO
SGD0.024
Each (On a Reel of 4000)
units
220Ω 2512 (6432M) Thick Film ±5% 1W ±100ppm/°C - - - - - CR -55°C +155°C
RS Stock No. 804-7274
BrandRS PRO
SGD0.001
Each (On a Reel of 10000)
units
68kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 713-4258
BrandRS PRO
SGD0.002
Each (On a Reel of 5000)
units
560kΩ 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 804-9075
BrandRS PRO
SGD0.005
Each (On a Reel of 5000)
units
620kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 717-2657
BrandRS PRO
SGD0.003
Each (On a Reel of 5000)
units
3.32kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
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RS Stock No. 183-9505
BrandRS PRO
SGD0.002
Each (On a Reel of 15000)
units
10Ω 0201 (0603M) Thick Film ±1% 50mW ±200ppm/°C - - - - - CR -55°C +125°C
RS Stock No. 717-3158
BrandRS PRO
SGD0.003
Each (On a Reel of 5000)
units
162kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-1719
BrandRS PRO
SGD0.059
Each (On a Reel of 1000)
units
4.7Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 802-9627
BrandRS PRO
SGD0.004
Each (On a Reel of 5000)
units
1.1kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 169-1827
BrandRS PRO
SGD0.053
Each (On a Reel of 500)
units
1kΩ Melf 0207 Thin Film ±0.5% 0.5W ±50ppm/°C AEC Q200 - - - - RSAMMF -55°C +155°C
RS Stock No. 717-1008
BrandRS PRO
SGD0.002
Each (On a Reel of 5000)
units
12.7kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 169-1664
BrandRS PRO
SGD0.086
Each (On a Reel of 1000)
units
150Ω Melf 0102 Thin Film ±1% 0.2W - AEC-Q200 Qualified - - - - - -55°C +155°C
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