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. 162-2543
Mfr. Part No.CR1206-JW-102GLF
BrandBourns
MYR415.55
1 Reel of 10000
Reel(s)
1 kΩ 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - CR1206 -55°C +155°C
RS Stock No. 701-4924
Mfr. Part No.CPF0402B1K0E1
MYR1.628
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. 164-5478
Mfr. Part No.CRGH1206J150R
MYR339.08
1 Reel of 5000
Reel(s)
150 Ω 1206 (3216M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C
RS Stock No. 763-4168
Mfr. Part No.ERJP08F49R9V
BrandPanasonic
MYR0.251
Each (On a Reel of 500)
units
49.9 Ω 1206 (3216M) Thick Film ±1% 0.66W ±100ppm/°C AEC-Q200 - - - - ERJP08 -55°C +155°C
RS Stock No. 893-5070
Mfr. Part No.LVK12R010DER
BrandOhmite
MYR1.533
Each (In a Pack of 50)
units
10 mΩ 1206 (3216M) Metal Strip ±0.5% 0.5W ±50ppm/°C - - - - - LVK12 -40°C +125°C
RS Stock No. 901-3406
Mfr. Part No.MCR01MZPF1501
BrandROHM
MYR0.253
Each (In a Bag of 100)
units
1.5 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 866-7437
Mfr. Part No.CPF-A-0805B470RE1
MYR1.594
Each (In a Bag of 10)
units
470 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - CPF-A -55°C +155°C
RS Stock No. 164-8725
Mfr. Part No.CRG0603F330R
MYR169.54
1 Reel of 5000
Reel(s)
330 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 794-4219
Mfr. Part No.CRL1206-FW-R240ELF
BrandBourns
MYR0.454
Each (In a Pack of 10)
units
240 mΩ 1206 (3216M) Thick Film ±1% 0.25W ±200ppm/°C - - - - - CRL -55°C +125°C
RS Stock No. 167-5163
Mfr. Part No.CRL1206-JW-R100ELF
BrandBourns
MYR0.235
Each (On a Reel of 5000)
units
100 mΩ 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - CRL -55°C +125°C
RS Stock No. 740-9117
Mfr. Part No.CR1206-JW-102GLF
BrandBourns
MYR0.111
Each (In a Pack of 50)
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
MYR1,337.71
1 Reel of 5000
Reel(s)
910 Ω 0805 (2012M) Thin Film ±0.1% 0.125W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 114-2851
Mfr. Part No.ERJ6ENF4990V
BrandPanasonic
MYR259.22
1 Reel of 5000
Reel(s)
499 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 828-0807
Mfr. Part No.ERA6AEB911V
BrandPanasonic
MYR0.586
Each (In a Bag of 5)
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
MYR0.186
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. 123-4451
Mfr. Part No.RK73HW2HTTE3001F
BrandKOA
MYR0.919
Each (In a Bag of 50)
units
3 kΩ 2010 (5025M) Thick Film ±1% 0.75W ±100ppm/°C - - - - - RK73H -55°C +155°C
RS Stock No. 794-4238
Mfr. Part No.CRL1206-JW-R100ELF
BrandBourns
MYR0.463
Each (In a Pack of 10)
units
100 mΩ 1206 (3216M) Thick Film ±5% 0.25W ±200ppm/°C - - - - - CRL -55°C +125°C
RS Stock No. 223-2142
Mfr. Part No.CRG1206F150R
MYR0.21
Each (In a Pack of 50)
units
150 Ω 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 807-1139
Mfr. Part No.CRGH1206J150R
MYR10.85
1 Bag of 100
Bag(s)
150 Ω 1206 (3216M) Thick Film ±5% 0.5W ±200ppm/°C - - - - - CRGH -55°C +155°C
RS Stock No. 103-8749
Mfr. Part No.ERJP08F49R9V
BrandPanasonic
MYR690.69
1 Reel of 5000
Reel(s)
49.9 Ω 1206 (3216M) Thick Film ±1% 0.66W ±100ppm/°C - - - - - ERJP08 -55°C +155°C
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