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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Omschrijving Prijs Resistance Package/Case Technology Tolerance Power Rating Temperature Coefficient Automotive Standard Dimensions Length Depth Height Series Minimum Operating Temperature Maximum Operating Temperature
RS-stocknr. 126-0366
FabrikantnummerFC4L64R010FER
FabrikantArcol Ohmite
€ 1,43
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Aantal stuks
10 mΩ 2512 (6432M) Metal Foil ±1% 2W ±50ppm/°C - - - - - FC4L -55°C +155°C
RS-stocknr. 126-0376
FabrikantnummerFCSL110R050FER
FabrikantArcol Ohmite
€ 2,018
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Aantal stuks
50 mΩ 4320 Metal Foil ±1% 5W ±50ppm/°C - - - - - FCSL -55°C +155°C
RS-stocknr. 126-0395
FabrikantnummerMCS1632R010FER
FabrikantArcol Ohmite
€ 0,532
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10 mΩ 1632 Metal Film ±1% 1W ±50ppm/°C - - - - - MCS -25°C +125°C
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RS-stocknr. 210-4695
FabrikantnummerTKH45P300RFE-TR
FabrikantArcol Ohmite
€ 0,974
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Aantal stuks
300 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
RS-stocknr. 136-4775
FabrikantnummerAS25J1001ET
FabrikantArcol Ohmite
€ 0,164
Each (On a Tape of 100)
Aantal stuks
1 kΩ 2512 (6432M) Thick Film ±5% 1.5W ±100ppm/°C - - - - - AS25 -55°C +155°C
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RS-stocknr. 210-4702
FabrikantnummerTKH45P50R0FE-TR
FabrikantArcol Ohmite
€ 0,974
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50 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
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RS-stocknr. 210-4705
FabrikantnummerTKH45P5K00FE-TR
FabrikantArcol Ohmite
€ 2,002
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5 kΩ TO-252 Thick Film ±1% 45W - - - - - - - - -
RS-stocknr. 126-0379
FabrikantnummerLVK12R010FER
FabrikantArcol Ohmite
€ 0,626
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10 mΩ 0402 (1005M) - ±1% 0.5W ±50ppm/°C - - - - - LVK12 -40°C +125°C
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RS-stocknr. 210-4703
FabrikantnummerTKH45P50R0FE-TR
FabrikantArcol Ohmite
€ 2,002
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Aantal stuks
50 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
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RS-stocknr. 210-4696
FabrikantnummerTKH45P300RFE-TR
FabrikantArcol Ohmite
€ 2,002
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300 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
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RS-stocknr. 210-4672
FabrikantnummerTKH45P100RFE-TR
FabrikantArcol Ohmite
€ 2,002
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100 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
RS-stocknr. 136-4770
FabrikantnummerAS25J10R0ET
FabrikantArcol Ohmite
€ 0,165
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10 Ω 2512 (6432M) Thick Film ±5% 1.5W ±400ppm/°C - - - - - AS25 -55°C +155°C
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RS-stocknr. 210-4707
FabrikantnummerTKH45P5R00FE-TR
FabrikantArcol Ohmite
€ 2,002
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5 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
RS-stocknr. 136-3326
FabrikantnummerAS25J1001ET
FabrikantArcol Ohmite
€ 0,093
Each (On a Reel of 4000)
Aantal stuks
1 kΩ 2512 (6432M) Thick Film ±5% 1.5W ±100ppm/°C - - - - - AS25 -55°C +155°C
RS-stocknr. 136-4750
FabrikantnummerAS12J1R00ET
FabrikantArcol Ohmite
€ 0,049
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Aantal stuks
1 Ω 1206 (3216M) Thick Film ±5% 0.5W ±400ppm/°C - - - - - AS12 -55°C +155°C
RS-stocknr. 126-0348
FabrikantnummerFC4L110R005FER
FabrikantArcol Ohmite
€ 1,116
Each (In a Bag of 5)
Aantal stuks
5 mΩ 4320 Metal Foil ±1% 5W ±50ppm/°C - - - - - FC4L -55°C +155°C
RS-stocknr. 126-0369
FabrikantnummerFCSL05R010FER
FabrikantArcol Ohmite
€ 0,185
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Aantal stuks
10 mΩ - Metal Foil ±1% 0.2W - - - - - - FCSL -55°C +155°C
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RS-stocknr. 210-4689
FabrikantnummerTKH45P25R0FE-TR
FabrikantArcol Ohmite
€ 2,002
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Aantal stuks
25 Ω TO-252 Thick Film ±1% 45W - - - - - - - - -
RS-stocknr. 126-0402
FabrikantnummerMCS3264R020FER
FabrikantArcol Ohmite
€ 0,168
Each (In a Bag of 20)
Aantal stuks
20 mΩ 1225 (3264M) Metal Film ±1% 2W ±50ppm/°C - - - - - MCS -25°C +125°C
RS-stocknr. 126-0380
FabrikantnummerLVK12R020DER
FabrikantArcol Ohmite
€ 0,724
Each (In a Bag of 5)
Aantal stuks
20 mΩ 1206 (3216M) Thick Film ±0.5% 0.5W ±50ppm/°C - - - - - LVK12 -40°C +125°C