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. 187-0190
Mfr. Part No.35601R2JT
kr 8,965
Each (On a Reel of 1000)
Units
1.2 Ω 4257 (11070M Thick Film ±5% 6W ±200ppm/°C - - - - - 3560 -55°C +155°C
RS Stock No. 172-8286
Mfr. Part No.RN73C1J13RB
kr 7,636
Each (On a Reel of 1000)
Units
13 Ω 0603 (1608M) Thin Film ±0.1% 0.063W ±10ppm/°C - - - - - RN73 -55°C +125°C
RS Stock No. 732-4921
Mfr. Part No.ERJ2GEJ150X
BrandPanasonic
kr 0,03
Each (On a Reel of 10000)
Units
15 Ω 0402 (1005M) Thick Film ±5% 0.1W ±200ppm/°C AEC-Q200 - - - - ERJ2GEJ -55°C +155°C
RS Stock No. 732-6182
Mfr. Part No.ERJ6ENF20R0V
BrandPanasonic
kr 0,07
Each (On a Reel of 5000)
Units
20 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C AEC-Q200 - - - - ERJ6EN -55°C +155°C
RS Stock No. 123-3032
Mfr. Part No.CPF0805B590RE1
kr 2,194
Each (In a Bag of 20)
Units
590 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 820-6975
Mfr. Part No.CRCW060347K0JNEAIF
BrandVishay
kr 1,117
Each (In a Bag of 25)
Units
47 kΩ 0603 (1608M) Thick Film ±5% 0.1W ±200ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 922-6046
Mfr. Part No.ERJ12ZSFR18U
BrandPanasonic
kr 2,611
Each (On a Reel of 5000)
Units
180 mΩ 2010 (5025M) Thick Film ±1% 0.5W ±200ppm/°C - - - - - ERJ12Z -55°C +125°C
RS Stock No. 122-9010
Mfr. Part No.CPF0603B15K8E1
kr 3,47
Each (In a Bag of 20)
Units
15.8 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 169-1715
BrandRS PRO
kr 0,12
Each (On a Reel of 1000)
Units
2.2 Ω Melf 0204 Thin Film ±1% 0.4W - AEC-Q200 Qualified - - - - - -55°C +155°C
RS Stock No. 169-1510
Mfr. Part No.ERA3AEB361V
BrandPanasonic
kr 0,516
Each (On a Reel of 5000)
Units
360 Ω 0603 (1608M) Metal Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 167-5101
Mfr. Part No.PWR4318WR500JE
BrandBourns
kr 3,605
Each (On a Reel of 1500)
Units
500 mΩ 4318 Wire Wound ±5% 2W ±90ppm/°C - - - - - PWR4318 -55°C +155°C
RS Stock No. 114-2828
Mfr. Part No.ERJ6ENF30R9V
BrandPanasonic
kr 0,098
Each (On a Reel of 5000)
Units
30.9 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - ERJ -55°C +155°C
RS Stock No. 666-2746
Mfr. Part No.CPF0805B750KE
kr 2,432
Each (In a Pack of 5)
Units
750 kΩ 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - CPF -55°C +125°C
New
RS Stock No. 198-5521
Mfr. Part No.RT0603FRE0733K2L
BrandYageo
kr 0,062
Each (On a Reel of 5000)
Units
- 0603 (1608M) Thin Film ± 1% 0.05W - - - - - - - - -
RS Stock No. 819-9969
Mfr. Part No.PWR163S-25-2R20J
BrandBourns
kr 23,83
Each
Units
2.2 Ω DPAK Thick Film ±5% 25W ±100ppm/°C AEC-Q200 - - - - PWR163 -55°C +155°C
RS Stock No. 164-5068
Mfr. Part No.TLRS157550ER0005FTDG
kr 9,792
Each (On a Reel of 2000)
Units
500 µΩ 1575 Metal Strip ±1% 5W ±100ppm/°C - - - - - TLRS -55°C +170°C
RS Stock No. 106-8978
Mfr. Part No.ERA3AEB9532V
BrandPanasonic
kr 0,204
Each (On a Reel of 5000)
Units
95.3 kΩ 0603 (1608M) Metal Film ±0.1% 0.1W ±25ppm/°C - - - - - ERA -55°C +155°C
RS Stock No. 123-2941
Mfr. Part No.CPF0805B39R2E1
kr 1,526
Each (In a Bag of 20)
Units
39.2 Ω 0805 (2012M) Thin Film ±0.1% 0.1W ±25ppm/°C - - - - - CPF -55°C +155°C
RS Stock No. 168-9156
Mfr. Part No.ERA3AEB2613V
BrandPanasonic
kr 0,232
Each (On a Reel of 5000)
Units
261 kΩ 0603 (1608M) Metal Film ±0.1% 0.1W ±25ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 678-9973
Mfr. Part No.CRCW060320R0FKEA
BrandVishay
kr 0,385
Each (In a Pack of 50)
Units
20 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRCW -55°C +155°C
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