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
SGD0.005
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
SGD0.005
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
SGD23.98
1 Reel of 5000
Reel(s)
100 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 182-3577
Mfr. Part No.CRCW0603100KFKEA
BrandVishay
SGD0.02
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. 732-4968
Mfr. Part No.ERJ2GEJ184X
BrandPanasonic
SGD54.19
1 Reel of 10000
Reel(s)
180 kΩ 0402 (1005M) Thick Film ±5% 0.1W ±200ppm/°C - - - - - ERJ2GEJ -55°C +155°C
RS Stock No. 678-9673
Mfr. Part No.CRCW0603100KFKEA
BrandVishay
SGD0.027
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. 178-1881
Mfr. Part No.RMC1/2K152FTE
BrandKamaya
SGD0.056
Each (On a Reel of 4000)
units
1.5 kΩ 2010 (5025M) Thick Film ±1% 0.75W ±100ppm/°C - - - - - RMC -55°C +155°C
RS Stock No. 180-3737
Mfr. Part No.MMA02040C1008FB300
BrandVishay
SGD0.056
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. 168-8166
Mfr. Part No.MMA02040C1008FB300
BrandVishay
SGD130.18
1 Reel of 3000
Reel(s)
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
SGD0.148
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
SGD0.098
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. 163-8726
Mfr. Part No.3520680RJT
SGD313.60
1 Reel of 4000
Reel(s)
680 Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 163-8721
Mfr. Part No.352033KJT
SGD321.44
1 Reel of 4000
Reel(s)
33 kΩ 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 224-0389
Mfr. Part No.3520680RJT
SGD0.147
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. 224-0468
Mfr. Part No.352033KJT
SGD0.51
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. 215-1914
Mfr. Part No.RN73C2A332RB
SGD0.666
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
SGD0.054
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. 163-8863
Mfr. Part No.RN73C2A332RB
SGD529.20
1 Reel of 1000
Reel(s)
332 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 180-9727
Mfr. Part No.ERA3AEB101V
BrandPanasonic
SGD0.147
Each (On a Reel of 500)
units
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