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. 618-2316
Mfr. Part No.RC1206FR-0710ML
BrandYageo
MYR0.037
Each (In a Pack of 5000)
units
10 MΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RC1206 -55°C +155°C
RS Stock No. 168-9000
Mfr. Part No.ERA6AEB124V
BrandPanasonic
MYR0.151
Each (On a Reel of 5000)
units
120 kΩ 0805 (2012M) Metal Film ±0.1% 0.125W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 802-9618
BrandRS PRO
MYR0.027
Each (On a Reel of 5000)
units
1 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - - -55°C +155°C
RS Stock No. 865-4286
Mfr. Part No.ERJU06F1601V
BrandPanasonic
MYR0.219
Each (In a Bag of 100)
units
1.6 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 161-4466
Mfr. Part No.35205R6JT
MYR0.208
Each (On a Reel of 4000)
units
5.6 Ω 2512 (6432M) Thick Film ±5% 1W ±350ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 224-0115
Mfr. Part No.35205R6JT
MYR1.357
Each (In a Pack of 10)
units
5.6 Ω 2512 (6432M) Thick Film ±5% 1W ±350ppm/°C - - - - - 3520 -55°C +125°C
RS Stock No. 862-6893
Mfr. Part No.ERJPA3F30R0V
BrandPanasonic
MYR0.225
Each (In a Bag of 100)
units
30 Ω 0603 (1608M) Thick Film ±1% 0.25W ±100ppm/°C AEC-Q200 - - - - ERJPA3 -55°C +155°C
RS Stock No. 901-3440
Mfr. Part No.MCR01MZPF1002
BrandROHM
MYR0.281
Each (In a Bag of 100)
units
10 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 123-4387
Mfr. Part No.RK73H2ETTD20R0F
BrandKOA
MYR0.789
Each (In a Bag of 50)
units
20 Ω 1210 (3225M) Thick Film ±1% 0.5W ±100ppm/°C - - - - - RK73H -55°C +155°C
RS Stock No. 617-8935
Mfr. Part No.RC1206FR-074M7L
BrandYageo
MYR0.037
Each (In a Pack of 5000)
units
4.7 MΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - RC1206 -55°C +155°C
RS Stock No. 807-8039
Mfr. Part No.ERJ-12ZYJ102U
BrandPanasonic
MYR0.401
Each (In a Pack of 100)
units
1 kΩ 2010 (5025M) Thick Film ±5% 0.75W ±200ppm/°C AEC-Q200 - - - - ERJ -55°C +155°C
RS Stock No. 901-3437
Mfr. Part No.MCR01MZPF4701
BrandROHM
MYR0.286
Each (In a Bag of 100)
units
4.7 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 114-2851
Mfr. Part No.ERJ6ENF4990V
BrandPanasonic
MYR0.039
Each (On a Reel of 5000)
units
499 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 134-5462
Mfr. Part No.CRG0805F100R
MYR0.021
Each (On a Reel of 5000)
units
100 Ω 0805 (2012M) Thick Film ±1% 0.125W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 701-4924
Mfr. Part No.CPF0402B1K0E1
MYR1.16
Each (In a Pack of 10)
units
1 kΩ 0402 (1005M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 168-0067
Mfr. Part No.FC0402E5000FTBST0
BrandVishay
MYR19.02
Each (On a Tape of 100)
units
500 Ω 0402 (1005M) - ±1% 0.05W ±25ppm/°C - - - - - FC -55°C +125°C
RS Stock No. 162-2543
Mfr. Part No.CR1206-JW-102GLF
BrandBourns
MYR0.043
Each (On a Reel of 10000)
units
1 kΩ 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - CR1206 -55°C +155°C
RS Stock No. 169-1200
Mfr. Part No.ERA6AEB911V
BrandPanasonic
MYR0.154
Each (On a Reel of 5000)
units
910 Ω 0805 (2012M) Thin Film ±0.1% 0.125W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 125-1188
Mfr. Part No.CRG0805F100R
MYR0.046
Each (In a Bag of 100)
units
100 Ω 0805 (2012M) Thick Film ±1% 0.125W ±200ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 164-5478
Mfr. Part No.CRGH1206J150R
MYR0.055
Each (On a Reel of 5000)
units
150 Ω 1206 (3216M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C