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. 901-3692
Mfr. Part No.MCR10EZPF1002
BrandROHM
€0.016
Each (In a Bag of 100)
units
10 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - MCR -55°C +155°C
RS Stock No. 721-9346
Mfr. Part No.ERJT14J111U
BrandPanasonic
€0.022
Each (In a Pack of 5)
units
110 Ω 1210 (3225M) Thick Film ±5% 0.5W ±200ppm/°C AEC-Q200 - - - - ERJT14 -55°C +155°C
RS Stock No. 134-5485
Mfr. Part No.CRG0805F10K
€0.005
Each (On a Reel of 5000)
units
10 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 213-2222
Mfr. Part No.CRG0603F470R
€0.012
Each (In a Pack of 50)
units
470 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 168-9297
Mfr. Part No.ERA6ARB8871V
BrandPanasonic
€0.18
Each (On a Reel of 5000)
units
8.87 kΩ 0805 (2012M) Metal Film ±0.1% 0.125W ±10ppm/°C AEC-Q200 - - - - ERA -55°C +155°C
RS Stock No. 812-6973
Mfr. Part No.ERJ8ENF1201V
BrandPanasonic
€0.025
Each (In a Bag of 100)
units
1.2 kΩ 1206 (3216M) Thick Film ±1% 0.25W ±100ppm/°C AEC-Q200 - - - - ERJ8EN -55°C +155°C
RS Stock No. 168-8450
Mfr. Part No.CRCW040244K2FKED
BrandVishay
€0.005
Each (On a Reel of 10000)
units
44.2 kΩ 0402 (1005M) Thick Film ±1% 0.063W ±100ppm/°C - - - - - CRCW -55°C +155°C
RS Stock No. 168-9321
Mfr. Part No.ERJ2RHD5100X
BrandPanasonic
€0.011
Each (On a Reel of 10000)
units
510 Ω 0402 (1005M) Thick Film ±0.5% 0.063W ±50ppm/°C AEC-Q200 - - - - ERJ -55°C +125°C
RS Stock No. 134-5495
Mfr. Part No.CRG0805F100K
€0.005
Each (On a Reel of 5000)
units
100 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS Stock No. 223-0152
Mfr. Part No.CRG0805F10R
€0.009
Each (In a Pack of 50)
units
10 Ω 0805 Thick Film ±1% 0.125W ±200ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C
RS Stock No. 812-1653
Mfr. Part No.CRCW040233K0FKEDHP
BrandVishay
€0.076
Each (In a Bag of 100)
units
33 kΩ 0402 (1005M) Thick Film ±1% 0.2W ±100ppm/K - - - - - CRCW -55°C +155°C
RS Stock No. 666-2092
Mfr. Part No.CPF0603B4K7E
€0.216
Each (In a Pack of 5)
units
4.7 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +125°C
RS Stock No. 869-5485
Mfr. Part No.TLM3ADR020FTE
€0.495
Each (In a Bag of 10)
units
20 mΩ 2512 (6432M) Metal Strip ±1% 1W ±50ppm/°C - - - - - TLM -55°C ++55°°C
RS Stock No. 164-6201
Mfr. Part No.352230RFT
€0.255
Each (On a Reel of 2000)
units
30 Ω 2512 (6432M) Thick Film ±1% 3W - - - - - - 3522 -55°C +155°C
RS Stock No. 164-0403
Mfr. Part No.CPF0603B4K7E
€0.107
Each (On a Reel of 1000)
units
4.7 kΩ 0603 (1608M) Thin Film ±0.1% 0.063W ±25ppm/°C - - - - - CPF -55°C +125°C
RS Stock No. 763-7274
Mfr. Part No.Y16291K00000T9R
€15.79
Each
units
1 kΩ 0805 (2012M) Metal Foil ±0.01% 0.1W ±0.2ppm/°C - - - - - VFCP -55°C +125°C
RS Stock No. 740-8978
Mfr. Part No.CR0805-FX-1000ELF
BrandBourns
€0.013
Each (In a Pack of 50)
units
100 Ω 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CR0805 -55°C +155°C
RS Stock No. 717-1578
BrandRS PRO
€0.008
Each (On a Reel of 5000)
units
0 Ω 0805 (2012M) Thick Film ±5% 0.125W ±200ppm/°C - - - - - RS -55°C +155°C
RS Stock No. 105-8469
Mfr. Part No.ERJ3EKF20R0V
BrandPanasonic
€0.005
Each (On a Reel of 5000)
units
20 Ω 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C AEC-Q200 - - - - ERJ3EK -55°C +155°C
RS Stock No. 795-5134
Mfr. Part No.ERA6ARB8871V
BrandPanasonic
€0.427
Each (On a Tape of 100)
units
8.87 kΩ 0805 (2012M) Thin Film ±0.1% 0.125W ±10ppm/°C AEC-Q200 - - - - ERA -55°C +155°C