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庫存編號 647-5270
製造零件編號SMW28R2JT
HK$1.966
/個 (每包:5個)
單位
8.2 Ω - Wirewound ±5% 2W ±200ppm/°C - - - - - SM -55°C +200°C
RS庫存編號 161-6298
製造零件編號SMW28R2JT
HK$2,157.89
毎卷:2000 個
Reel(s)
8.2 Ω - Wire Wound ±5% 2W ±200ppm/°C - - - - - SM -55°C +200°C
RS庫存編號 134-5438
製造零件編號CRG0603F1K0
HK$121.89
毎卷:5000 個
Reel(s)
1 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 213-2266
製造零件編號CRG0603F1K0
HK$0.019
/個 (每包:50個)
單位
1 kΩ 0603 Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 164-5059
製造零件編號TLR3A20DR006FTDG
HK$2.698
個 (在毎卷:2000)
單位
6 mΩ 2512 (6432M) Metal Strip ±1% 2W ±50ppm/°C - - - - - TLR -55°C +170°C
RS庫存編號 771-7828
製造零件編號TLR3A20DR006FTDG
HK$8.774
/個 (每包:5個)
單位
6 mΩ 2512 (6432M) Metal Strip ±1% 2W ±50ppm/°C - - - - - TLR -55°C +170°C
RS庫存編號 134-5450
製造零件編號CRG0603F100K
HK$89.50
毎卷:5000 個
Reel(s)
100 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 213-2531
製造零件編號CRG0603F100K
HK$0.019
/個 (每包:50個)
單位
100 kΩ 0603 Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 755-1110
製造零件編號352115RFT
HK$2.592
/個 (每包:10個)
單位
15 Ω 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - 3521 -55°C +155°C
RS庫存編號 125-1173
製造零件編號CRG0603F10K
HK$0.12
個 (以毎袋:100)
單位
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 134-5445
製造零件編號CRG0603F10K
HK$64.76
毎卷:5000 個
Reel(s)
10 kΩ 0603 (1608M) Thick Film ±1% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 164-4805
製造零件編號352115RFT
HK$3,978.00
毎卷:4000 個
Reel(s)
15 Ω 2512 (6432M) Thick Film ±1% 2W ±100ppm/°C - - - - - 3521 -55°C +155°C
RS庫存編號 161-4049
製造零件編號352056RJT
HK$1,601.73
毎卷:4000 個
Reel(s)
56 Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS庫存編號 134-5474
製造零件編號CRG0805F1K0
HK$126.27
毎卷:5000 個
Reel(s)
1 kΩ 0805 (2012M) Thick Film ±1% 0.125W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 164-5054
製造零件編號TLR3A20DR0045FTDG
HK$2.698
個 (在毎卷:2000)
單位
4.5 mΩ 2512 (6432M) Metal Strip ±1% 2W ±50ppm/°C - - - - - TLR -55°C +170°C
RS庫存編號 224-0238
製造零件編號352056RJT
HK$0.776
/個 (每包:10個)
單位
56 Ω 2512 (6432M) Thick Film ±5% 1W ±200ppm/°C - - - - - 3520 -55°C +125°C
RS庫存編號 125-1171
製造零件編號CRG0603ZR
HK$0.016
個 (以毎袋:100)
單位
0 Ω 0402 (1005M) Thick Film ±0% 0.1W - - - - - - CRG -55°C +125°C
RS庫存編號 134-5428
製造零件編號CRG0603ZR
HK$73.80
毎卷:5000 個
Reel(s)
0 Ω 0603 (1608M) Thick Film ±0% 0.1W ±100ppm/°C - - - - - CRG -55°C +125°C
RS庫存編號 771-7815
製造零件編號TLR3A20DR0045FTDG
HK$4.366
/個 (每包:5個)
單位
4.5 mΩ 2512 (6432M) Metal Strip ±1% 2W ±50ppm/°C - - - - - TLR -55°C +170°C
RS庫存編號 223-0427
製造零件編號CRG0805F1K0
HK$0.223
/個 (每包:50個)
單位
1 kΩ 0805 Thick Film ±1% 0.125W ±100ppm/°C - 2 x 0.5mm 2mm 1.25mm 0.5mm CRG -55°C +125°C