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. 134-5485
Mfr. Part No.CRG0805F10K
SGD0.008
Each (On a Reel of 5000)
units
10 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1189
Mfr. Part No.CRG0805F10K
SGD0.014
Each (In a Bag of 100)
units
10 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 169-4218
Mfr. Part No.CRCW0603100KFKEA
BrandVishay
SGD0.006
Each (On a Reel of 5000)
units
100 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 678-9673
Mfr. Part No.CRCW0603100KFKEA
BrandVishay
SGD0.057
Each (In a Pack of 50)
units
100 kΩ 0603 Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 182-3577
Mfr. Part No.CRCW0603100KFKEA
BrandVishay
SGD0.009
Each (On a Reel of 1000)
units
100 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/K AEC-Q200 - - - - CRCW -55°C +155°C
RS Stock No. 224-0389
Mfr. Part No.3520680RJT
SGD0.412
Each (In a Pack of 10)
units
680 Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 163-8726
Mfr. Part No.3520680RJT
SGD0.079
Each (On a Reel of 4000)
units
680 Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 180-3737
Mfr. Part No.MMA02040C1008FB300
BrandVishay
SGD0.149
Each (On a Reel of 500)
units
1 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 224-0468
Mfr. Part No.352033KJT
SGD0.492
Each (In a Pack of 10)
units
33 kΩ 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 168-8166
Mfr. Part No.MMA02040C1008FB300
BrandVishay
SGD0.075
Each (On a Reel of 3000)
units
1 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 678-7179
Mfr. Part No.MMA02040C1008FB300
BrandVishay
SGD0.341
Each (In a Pack of 25)
units
1 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/°C - - - - - MMA0204 -55°C +125°C
RS Stock No. 901-3522
Mfr. Part No.MCR03EZPFX49R9
BrandROHM
SGD0.086
Each (In a Bag of 100)
units
49.9 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 558-681
Mfr. Part No.RMC1/2K152FTE
BrandKamaya
SGD0.264
Each (In a Pack of 50)
units
1.5 kΩ 2010 (5025M) Thick Film ±1% 0.75W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 163-8721
Mfr. Part No.352033KJT
SGD0.079
Each (On a Reel of 4000)
units
33 kΩ 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 172-4304
Mfr. Part No.ERJU06F36R0V
BrandPanasonic
SGD0.024
Each (On a Reel of 5000)
units
36 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 163-8863
Mfr. Part No.RN73C2A332RB
SGD0.60
Each (On a Reel of 1000)
units
332 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 566-535
Mfr. Part No.ERA3AEB101V
BrandPanasonic
SGD0.528
Each (In a Pack of 5)
units
100 Ω 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 215-1914
Mfr. Part No.RN73C2A332RB
SGD1.378
Each (In a Pack of 5)
units
332 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 741-9767
Mfr. Part No.ERA3AEB101V
BrandPanasonic
SGD0.056
Each (On a Reel of 5000)
units
100 Ω 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - ERA -55°C +155°C
RS Stock No. 180-9727
Mfr. Part No.ERA3AEB101V
BrandPanasonic
SGD0.176
Each (On a Reel of 500)
units
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