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. 134-5501
Mfr. Part No.CRG1206F10R
MYR0.034
Each (On a Reel of 5000)
units
10Ω 0402 (1005M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-1997
Mfr. Part No.CRG1206F10R
MYR0.231
Each (In a Pack of 50)
units
10Ω 1206 (3216M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1189
Mfr. Part No.CRG0805F10K
MYR0.083
Each (In a Bag of 100)
units
10kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5485
Mfr. Part No.CRG0805F10K
MYR0.021
Each (On a Reel of 5000)
units
10kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 664-1679
Mfr. Part No.SMW5330RJT
MYR3.448
Each (In a Pack of 5)
units
330Ω - Wire Wound ±5% 5W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 223-0427
Mfr. Part No.CRG0805F1K0
MYR0.215
Each (In a Pack of 50)
units
1kΩ 0805 Thick Film ±1% 0.125W ±100ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C
RS Stock No. 134-5474
Mfr. Part No.CRG0805F1K0
MYR0.023
Each (On a Reel of 5000)
units
1kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 164-0540
Mfr. Part No.SMW5330RJT
MYR1.448
Each (On a Reel of 500)
units
330Ω - Wire Wound ±5% 5W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 134-5452
Mfr. Part No.CRG0603F330K
MYR0.013
Each (On a Reel of 5000)
units
330kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 213-2604
Mfr. Part No.CRG0603F330K
MYR0.039
Each (In a Pack of 50)
units
330kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 122-9653
Mfr. Part No.CPF0603B866KE1
MYR2.061
Each (In a Bag of 20)
units
866kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 223-0691
Mfr. Part No.CRG0805F100K
MYR0.144
Each (In a Pack of 50)
units
100kΩ 0805 Thick Film ±1% 0.125W ±100ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C
RS Stock No. 134-5495
Mfr. Part No.CRG0805F100K
MYR0.021
Each (On a Reel of 5000)
units
100kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 123-9886
Mfr. Part No.CPF0603B866KE1
MYR0.683
Each (On a Reel of 1000)
units
866kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 224-0115
Mfr. Part No.35205R6JT
MYR1.357
Each (In a Pack of 10)
units
5.6Ω 2512 (6432M) Thick Film ±5% 1W ±350ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 161-4466
Mfr. Part No.35205R6JT
MYR0.208
Each (On a Reel of 4000)
units
5.6Ω 2512 (6432M) Thick Film ±5% 1W ±350ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 164-8725
Mfr. Part No.CRG0603F330R
MYR0.013
Each (On a Reel of 5000)
units
330Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 807-1139
Mfr. Part No.CRGH1206J150R
MYR0.14
Each (In a Bag of 100)
units
150Ω 1206 (3216M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C
RS Stock No. 701-4924
Mfr. Part No.CPF0402B1K0E1
MYR1.16
Each (In a Pack of 10)
units
1kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 164-5478
Mfr. Part No.CRGH1206J150R
MYR0.055
Each (On a Reel of 5000)
units
150Ω 1206 (3216M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C