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. 134-5500
Mfr. Part No.CRG1206ZR
TWD0.20
Each (On a Reel of 5000)
units
0 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-1981
Mfr. Part No.CRG1206ZR
TWD1.30
Each (In a Pack of 50)
units
0 Ω 1206 Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 125-1173
Mfr. Part No.CRG0603F10K
TWD0.40
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. 134-5445
Mfr. Part No.CRG0603F10K
TWD0.10
Each (On a Reel of 5000)
units
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 162-2429
Mfr. Part No.FC0402E50R0FTBST0
BrandVishay
TWD162.40
Each (On a Tape of 100)
units
50 Ω 0402 (1005M) - ±1% 0.05W ±25ppm/°C - - - - - FC -55°C +125°C
RS Stock No. 683-4698
Mfr. Part No.FC0402E50R0FTBST0
BrandVishay
TWD238.00
Each
units
50 Ω 0402 (1005M) - ±1% 0.05W ±25ppm/°C - - - - - FC -55°C +125°C
RS Stock No. 167-0057
Mfr. Part No.PWR163S-25-20R0J
BrandBourns
TWD68.80
Each (In a Tube of 50)
units
20 Ω DPAK Metal Film ±5% 25W ±100ppm/°C AEC-Q200 - - - - PWR163 -55°C +155°C
RS Stock No. 678-4697
Mfr. Part No.CRCW040210K0FKED
BrandVishay
TWD1.40
Each (In a Pack of 50)
units
10 kΩ 0402 Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 819-9956
Mfr. Part No.PWR163S-25-20R0J
BrandBourns
TWD89.00
Each
units
20 Ω DPAK Thick Film ±5% 25W ±100ppm/°C AEC-Q200 - - - - PWR163 -55°C +155°C
RS Stock No. 168-8123
Mfr. Part No.CRCW040210K0FKED
BrandVishay
TWD0.30
Each (On a Reel of 10000)
units
10 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 181-9172
Mfr. Part No.CRCW040210K0FKED
BrandVishay
TWD0.50
Each (On a Reel of 1000)
units
10 kΩ 0402 (1005M) Thick Film ±1% - - - - - - - CRCW -55°C +155°C
RS Stock No. 901-3553
Mfr. Part No.MCR03EZPFX1001
BrandROHM
TWD1.70
Each (In a Bag of 100)
units
1 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 134-5502
Mfr. Part No.CRG1206F15R
TWD0.30
Each (On a Reel of 5000)
units
15 Ω 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 810-1877
Mfr. Part No.ERJ6RBD6202V
BrandPanasonic
TWD1.50
Each (In a Bag of 100)
units
62 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 223-2013
Mfr. Part No.CRG1206F15R
TWD0.60
Each (In a Pack of 50)
units
15 Ω 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 103-9269
Mfr. Part No.ERJ6RBD1001V
BrandPanasonic
TWD0.70
Each (On a Reel of 5000)
units
1 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C - - - - - ERJ -55°C +125°C
RS Stock No. 169-0939
Mfr. Part No.ERJ6RBD6202V
BrandPanasonic
TWD0.70
Each (On a Reel of 5000)
units
62 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 810-1678
Mfr. Part No.ERJ6RBD1001V
BrandPanasonic
TWD1.50
Each (In a Bag of 100)
units
1 kΩ 0805 (2012M) Thick Film ±0.5% 0.1W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 181-9032
Mfr. Part No.CRCW04020000Z0EDHP
BrandVishay
TWD0.40
Each (On a Reel of 10000)
units
0 Ω 0402 (1005M) Thick Film - 0.2W - AEC-Q200 - - - - CRCW-HP e3 -55°C +155°C
RS Stock No. 181-9247
Mfr. Part No.CRCW04020000Z0EDHP
BrandVishay
TWD0.80
Each (On a Reel of 1000)
units
0 Ω 0402 (1005M) Thick Film ±1% - - - - - - - CRCW -55°C +155°C