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 (PCBs).

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. 180-4449
Mfr. Part No.MMA02040E1800BB100
BrandVishay
€0.496
Each (On a Reel of 500)
units
180 Ω Melf 0204 Thin Film ±0.1% 0.07W ±15ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 180-4084
Mfr. Part No.MMA02040E1800BB100
BrandVishay
€0.315
Each (On a Reel of 3000)
units
180 Ω Melf 0204 Thin Film ±0.1% 0.07W ±15ppm/K AEC-Q200 - - - - MMA -55°C +125°C
RS Stock No. 678-7630
Mfr. Part No.MMA02040E1800BB100
BrandVishay
€0.826
Each (In a Pack of 5)
units
180 Ω Melf 0204 Thin Film ±0.1% 0.25W ±15ppm/°C - - - - - MMA0204 -55°C +175°C
RS Stock No. 170-1954
Mfr. Part No.CRCW0805100RFKEAHP
BrandVishay
€0.01
Each (On a Reel of 5000)
units
100 Ω 0805 (2012M) Thick Film ±1% 0.5W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 812-3362
Mfr. Part No.CRCW0805100RFKEAHP
BrandVishay
€0.012
Each (In a Bag of 25)
units
100 Ω 0805 (2012M) Thick Film ±1% 0.5W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 679-2402
Mfr. Part No.CRCW2512100RFKEG
BrandVishay
€0.255
Each (In a Pack of 25)
units
100 Ω 2512 (6432M) Thick Film ±1% 1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 678-9295
Mfr. Part No.CRCW04023M00FKED
BrandVishay
€0.003
Each (In a Pack of 50)
units
3 MΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 182-3716
Mfr. Part No.CRCW04023M00FKED
BrandVishay
€0.011
Each (On a Reel of 1000)
units
3 MΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/K AEC-Q200 - - - - CRCW -55°C +155°C
RS Stock No. 168-8438
Mfr. Part No.CRCW04023M00FKED
BrandVishay
€0.002
Each (On a Reel of 10000)
units
3 MΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 134-5482
Mfr. Part No.CRG0805F4K7
€0.005
Each (On a Reel of 5000)
units
4.7 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 116-9353
Mfr. Part No.ERJ8GEYJ200V
BrandPanasonic
€0.011
Each (On a Reel of 5000)
units
20 Ω 0603 (1608M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - ERJ8GE -55°C +155°C
RS Stock No. 223-0528
Mfr. Part No.CRG0805F4K7
€0.027
Each (In a Pack of 50)
units
4.7 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. 181-9283
Mfr. Part No.CRCW040234K8FKED
BrandVishay
€0.012
Each (On a Reel of 1000)
units
34.8 kΩ 0402 (1005M) Thick Film ±1% - - - - - - - CRCW -55°C +155°C
RS Stock No. 168-8415
Mfr. Part No.CRCW040234K8FKED
BrandVishay
€0.011
Each (On a Reel of 10000)
units
34.8 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 678-9207
Mfr. Part No.CRCW040234K8FKED
BrandVishay
€0.032
Each (In a Pack of 50)
units
34.8 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 701-4992
Mfr. Part No.CPF0402B4K7E1
€0.266
Each (In a Pack of 10)
units
4.7 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 169-4494
Mfr. Part No.CRCW08050000Z0EA
BrandVishay
€0.011
Each (On a Reel of 5000)
units
0 Ω 0805 (2012M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 737-9120
BrandRS PRO
€0.004
Each (On a Reel of 10000)
units
10 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 812-1773
Mfr. Part No.CRCW12060000Z0EAHP
BrandVishay
€0.107
Each (In a Bag of 25)
units
0 Ω 1206 (3216M) Thick Film ±0% 0.5W - - - - - - CRCW -55°C +155°C
RS Stock No. 812-3394
Mfr. Part No.CRCW0805150RFKEAHP
BrandVishay
€0.012
Each (On a Tape of 25)
units
150 Ω 0805 (2012M) Thick Film ±1% 0.5W ±100ppm/K - - - - - CRCW -55°C +155°C
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