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. 164-8744
Mfr. Part No.RN73C1J10KB
$1.54
Each (In a Bag of 250)
units
10 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 472-799
Mfr. Part No.RN73C1J10KB
$2.224
Each (In a Pack of 5)
units
10 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 125-1189
Mfr. Part No.CRG0805F10K
$0.042
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. 134-5485
Mfr. Part No.CRG0805F10K
$0.005
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. 223-0427
Mfr. Part No.CRG0805F1K0
$0.078
Each (In a Pack of 50)
units
1 kΩ 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
$22.47
1 Reel of 5000
Reel(s)
1 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5516
Mfr. Part No.CRG1206F1K0
$60.00
1 Reel of 5000
Reel(s)
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1190
Mfr. Part No.CRG1206F1K0
$0.05
Each (In a Bag of 100)
units
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5445
Mfr. Part No.CRG0603F10K
$22.22
1 Reel of 5000
Reel(s)
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5495
Mfr. Part No.CRG0805F100K
$60.00
1 Reel of 5000
Reel(s)
100 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1173
Mfr. Part No.CRG0603F10K
$0.024
Each (In a Bag of 100)
units
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-0691
Mfr. Part No.CRG0805F100K
$0.022
Each (In a Pack of 50)
units
100 kΩ 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. 125-1192
Mfr. Part No.CRG1206F10K
$0.043
Each (In a Bag of 100)
units
10 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5524
Mfr. Part No.CRG1206F10K
$65.00
1 Reel of 5000
Reel(s)
10 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 807-1069
Mfr. Part No.CRGH1206F10K
$4.08
1 Bag of 100
Bag(s)
10 kΩ 1206 (3216M) Thick Film ±1% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C
RS Stock No. 164-5464
Mfr. Part No.CRGH1206F10K
$145.00
1 Reel of 5000
Reel(s)
10 kΩ 1206 (3216M) Thick Film ±1% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C
RS Stock No. 134-5507
Mfr. Part No.CRG1206F150R
$90.00
1 Reel of 5000
Reel(s)
150 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1183
Mfr. Part No.RN73C2A1K0B
$1.253
Each (In a Bag of 10)
units
1 kΩ 0805 (2012M) Thin Film ±0.1% 0.1W ±10ppm/°C - - - - - RN73 -55°C +155°C
RS Stock No. 223-2142
Mfr. Part No.CRG1206F150R
$0.06
Each (In a Pack of 50)
units
150 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 134-5438
Mfr. Part No.CRG0603F1K0
$39.27
1 Reel of 5000
Reel(s)
1 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C