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. 807-8105
Mfr. Part No.ERJ-14YJ331U
BrandPanasonic
TWD1.90
Each (In a Pack of 100)
units
330 Ω 1210 (3225M) Thick Film ±5% 0.5W ±200ppm/°C AEC-Q200 - - - - ERJ -55°C +155°C
RS Stock No. 812-1556
Mfr. Part No.CRCW04020000Z0EDHP
BrandVishay
TWD1.00
Each (In a Bag of 100)
units
0 Ω 0402 (1005M) Thick Film ±0% 0.2W - - - - - - CRCW -55°C +155°C
RS Stock No. 810-1726
Mfr. Part No.ERJ6RBD1602V
BrandPanasonic
TWD1.50
Each (In a Bag of 100)
units
16 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 169-0897
Mfr. Part No.ERJ6RBD1602V
BrandPanasonic
TWD0.70
Each (On a Reel of 5000)
units
16 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 168-8201
Mfr. Part No.MMA02040C2709FB300
BrandVishay
TWD1.20
Each (On a Reel of 3000)
units
27 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 180-3783
Mfr. Part No.MMA02040C2709FB300
BrandVishay
TWD1.90
Each (On a Reel of 500)
units
27 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 678-7337
Mfr. Part No.MMA02040C2709FB300
BrandVishay
TWD4.20
Each (In a Pack of 25)
units
27 Ω Melf 0204 Thin Film ±1% 0.25W ±50ppm/°C - - - - - MMA0204 -55°C +125°C
RS Stock No. 647-6166
Mfr. Part No.SMW310RJT
TWD21.60
Each (In a Pack of 5)
units
10 Ω - Wire Wound ±5% 3W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 169-0839
Mfr. Part No.ERJ2RKD16R0X
BrandPanasonic
TWD0.40
Each (On a Reel of 10000)
units
16 Ω 0402 (1005M) Thick Film ±0.5% 0.063W ±100ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 161-6300
Mfr. Part No.SMW310RJT
TWD5.70
Each (On a Reel of 1000)
units
10 Ω - Wire Wound ±5% 3W ±200ppm/°C - - - - - SM -55°C +200°C
RS Stock No. 679-0443
Mfr. Part No.CRCW0603499KFKEA
BrandVishay
TWD1.30
Each (In a Pack of 50)
units
499 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 134-5429
Mfr. Part No.CRG0603F10R
TWD0.10
Each (On a Reel of 5000)
units
10 Ω 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 181-9042
Mfr. Part No.CRCW0402120RFKEDHP
BrandVishay
TWD0.50
Each (On a Reel of 10000)
units
120 Ω 0402 (1005M) Thick Film ±1% 0.2W ±100ppm/K AEC-Q200 - - - - CRCW-HP e3 -55°C +155°C
RS Stock No. 181-9408
Mfr. Part No.CRCW0402120RFKEDHP
BrandVishay
TWD1.10
Each (On a Reel of 1000)
units
120 Ω 0402 (1005M) Thick Film ±1% - - - - - - - CRCW -55°C +155°C
RS Stock No. 812-1574
Mfr. Part No.CRCW0402120RFKEDHP
BrandVishay
TWD1.70
Each (In a Bag of 100)
units
120 Ω 0402 (1005M) Thick Film ±1% 0.2W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 852-6617
Mfr. Part No.CH0402-50RJF
BrandVishay
TWD114.00
Each
units
50 Ω 0402 (1005M) Thin Film ±5% 0.05W ±100ppm/°C - - - - - CH -55°C +155°C
RS Stock No. 123-9301
Mfr. Part No.CPF0603B21RE1
TWD4.20
Each (On a Reel of 1000)
units
21 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 213-2008
Mfr. Part No.CRG0603F10R
TWD0.20
Each (In a Pack of 50)
units
10 Ω 0603 (1608M) Thick Film ±1% 0.1W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 740-9085
Mfr. Part No.CR1206-FX-10R0ELF
BrandBourns
TWD0.70
Each (In a Pack of 50)
units
10 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CR1206 -55°C +155°C
RS Stock No. 181-8077
Mfr. Part No.CRCW0603499KFKEA
BrandVishay
TWD0.20
Each (On a Reel of 1000)
units
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