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
MYR0.035
Each (On a Reel of 5000)
units
10 Ω 0402 (1005M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-1997
Mfr. Part No.CRG1206F10R
MYR0.087
Each (In a Pack of 50)
units
10 Ω 1206 (3216M) Thick Film ±1% 0.25W 100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 618-5163
Mfr. Part No.RC0805FR-0710KL
BrandYageo
MYR0.022
Each (In a Pack of 5000)
units
10 kΩ 0805 Thick Film ±1% 0.125W ±100ppm/°C - - - - - RC0805 -55°C +155°C
RS Stock No. 880-2182
Mfr. Part No.RCP2512W25R0GEB
BrandVishay
MYR19.074
Each (In a Bag of 5)
units
25 Ω 2512 (6432M) Thick Film ±2% 3.5W ±100ppm/°C - - - - - RCP -55°C +155°C
RS Stock No. 125-1189
Mfr. Part No.CRG0805F10K
MYR0.051
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
MYR0.022
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. 566-800
Mfr. Part No.ERA3AEB102V
BrandPanasonic
MYR1.092
Each (In a Pack of 5)
units
1 kΩ 0603 Thin Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 740-9192
Mfr. Part No.CRL1206-FW-R750ELF
BrandBourns
MYR0.421
Each (In a Pack of 50)
units
750 mΩ 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRL -55°C +125°C
RS Stock No. 167-5434
Mfr. Part No.CRL1206-FW-R750ELF
BrandBourns
MYR0.222
Each (On a Reel of 5000)
units
750 mΩ 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRL -55°C +125°C
RS Stock No. 180-9728
Mfr. Part No.ERA3AEB102V
BrandPanasonic
MYR0.416
Each (On a Reel of 500)
units
- - - - - - - - - - - - - -
RS Stock No. 741-9785
Mfr. Part No.ERA3AEB102V
BrandPanasonic
MYR0.162
Each (On a Reel of 5000)
units
1 kΩ 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - ERA -55°C +155°C
RS Stock No. 134-5474
Mfr. Part No.CRG0805F1K0
MYR0.022
Each (On a Reel of 5000)
units
1 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 664-1679
Mfr. Part No.SMW5330RJT
MYR3.55
Each (In a Pack of 5)
units
330 Ω 5329 (13573M) Wire Wound ±5% 5W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 122-9395
Mfr. Part No.ERJ3EKF7500V
BrandPanasonic
MYR0.035
Each (On a Reel of 5000)
units
750 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 164-0540
Mfr. Part No.SMW5330RJT
MYR2.145
Each (On a Reel of 500)
units
330 Ω 5329 (13573M) Wire Wound ±5% 5W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 618-0528
Mfr. Part No.RC1206FR-071KL
BrandYageo
MYR0.04
Each (In a Pack of 5000)
units
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RC1206 -55°C +155°C
RS Stock No. 223-0427
Mfr. Part No.CRG0805F1K0
MYR0.206
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. 167-4485
Mfr. Part No.CRM2512-FX-R100ELF
BrandBourns
MYR2.22
Each (On a Reel of 4000)
units
100 mΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - CRM -55°C +155°C
RS Stock No. 720-3215
Mfr. Part No.CRM2512-FX-R100ELF
BrandBourns
MYR5.414
Each (In a Pack of 5)
units
100 mΩ 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - CRM -55°C +155°C
RS Stock No. 179-9589
Mfr. Part No.ERA3AEB302V
BrandPanasonic
MYR0.512
Each (On a Reel of 250)
units
3 kΩ 0603 (1608M) Thin Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - E24 -55°C +155°C