21ohm Chip SMD Resistors:

44 Products Found
We offer a wide range of Metal Film, Metal Foil, and Thick Film chip SMD resistors, with resistance values from 0.003Ω to 50GΩ and power ratings from 30mW to 50W.

How do I choose a chip SMD resistor?

Chip SMD resistors are commonly used for pull-up/pull-down operations to ensure a signal is at valid logic level when external devices are removed, voltage divisions, current limiting, and filtering signals at certain frequencies in high-pass/low-pass/band-pass filters. You can use 0Ω resistors as jumpers to disable a sub-section of a circuit. There are three kinds of Chip SMD Resistors:

  1. Thin Film or Metal Film resistors are used in high precision applications like audio, medical, or test equipment. They have lower variation (0.1%-2%), a lower temperature coefficient (5 ppm/K), and are less noisy compared to thick film resistors. However, they are more expensive.
  2. Thick Film resistors are the most common type of resistor, and are used for most applications. They have higher variation (1%-5%), a higher temperature coefficient (50 ppm/K), and are noisier than thin film resistors. If there are no specific performance requirements, thick film resistors are usually the preferred choice.
  3. There are also Metal Foil resistors which provide high rated power and excellent load life stability along with extremely low Temperature Coefficient of Resistance (TCR).

SMD resistor sizes

The shape and size of chip SMD resistors are standardized, with most manufacturers using the JEDEC standards. The size of chip SMD resistors is indicated by a numerical code, such as 0603. This code contains the length and width of the package. So, the imperial code 0603 indicates a length of 0.060" and a width of 0.030".

Although SMD package codes can be given in either imperial or metric units, the imperial code is used more often to indicate the package size. Confusingly, even when the imperial naming convention is used, the metric dimensions are often used during the design of the printed circuit boards (PCBs). In general, you can assume the code is in imperial units, but the dimensions used are in mm. The SMD resistor size used depends primarily on the required power rating, the minimum feature size of the PCB manufacturing, and the limitations of the pick-and-place equipment.

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2561875RL

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500+
S$0.048
(S$0.0523)
1000+
S$0.037
(S$0.0403)
2500+
S$0.029
(S$0.0316)
5000+
S$0.020
(S$0.0218)
25000+
S$0.019
(S$0.0207)
More Pricing...
Min: 500 / Mult: 10
21ohm
± 1%
250mW
0603 [1608 Metric]
Thick Film
High Power, Anti-Surge
ERJ-PA3 Series
± 100ppm/°C
150V
1.6mm
0.85mm
-55°C
155°C
AEC-Q200
2561875

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10+
S$0.122
(S$0.133)
100+
S$0.059
(S$0.0643)
500+
S$0.048
(S$0.0523)
1000+
S$0.037
(S$0.0403)
2500+
S$0.029
(S$0.0316)
More Pricing...
Min: 10 / Mult: 10
21ohm
± 1%
250mW
0603 [1608 Metric]
Thick Film
High Power, Anti-Surge
ERJ-PA3 Series
± 100ppm/°C
150V
1.6mm
0.85mm
-55°C
155°C
AEC-Q200
2615153

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1000+
S$0.188
(S$0.2049)
5000+
S$0.155
(S$0.169)
10000+
S$0.152
(S$0.1657)
Min: 1000 / Mult: 1000
21ohm
± 0.1%
62.5mW
0402 [1005 Metric]
Thin Film
Precision Low TCR
CPF Series
± 25ppm/°C
25V
1.02mm
0.5mm
-55°C
155°C
-
2138766

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S$0.062
(S$0.0676)
100+
S$0.033
(S$0.036)
500+
S$0.021
(S$0.0229)
1000+
S$0.018
(S$0.0196)
2500+
S$0.017
(S$0.0185)
Min: 10 / Mult: 10
21ohm
± 1%
125mW
0805 [2012 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
150V
2mm
1.25mm
-55°C
155°C
AEC-Q200
2141198

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S$0.070
(S$0.0763)
100+
S$0.036
(S$0.0392)
500+
S$0.034
(S$0.0371)
1000+
S$0.019
(S$0.0207)
2500+
S$0.017
(S$0.0185)
Min: 10 / Mult: 10
21ohm
± 1%
100mW
0603 [1608 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
75V
1.55mm
0.85mm
-55°C
155°C
AEC-Q200
2302451

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S$0.044
(S$0.048)
100+
S$0.025
(S$0.0272)
500+
S$0.020
(S$0.0218)
2500+
S$0.013
(S$0.0142)
5000+
S$0.011
(S$0.012)
Min: 10 / Mult: 10
21ohm
± 1%
100mW
0402 [1005 Metric]
Thick Film
Precision
ERJ-2RK Series
± 100ppm/°C
50V
1.02mm
0.5mm
-55°C
155°C
AEC-Q200
2330550RL

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S$0.266
(S$0.2899)
250+
S$0.249
(S$0.2714)
500+
S$0.231
(S$0.2518)
Min: 100 / Mult: 10
21ohm
± 0.1%
62.5mW
0402 [1005 Metric]
Thin Film
Precision Low TCR
CPF Series
± 25ppm/°C
25V
1.02mm
0.5mm
-55°C
155°C
-
2330550

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S$0.430
(S$0.4687)
50+
S$0.337
(S$0.3673)
100+
S$0.266
(S$0.2899)
250+
S$0.249
(S$0.2714)
500+
S$0.231
(S$0.2518)
Min: 1 / Mult: 1
21ohm
± 0.1%
62.5mW
0402 [1005 Metric]
Thin Film
Precision Low TCR
CPF Series
± 25ppm/°C
25V
1.02mm
0.5mm
-55°C
155°C
-
2139278

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10+
S$0.092
(S$0.1003)
100+
S$0.050
(S$0.0545)
500+
S$0.040
(S$0.0436)
1000+
S$0.030
(S$0.0327)
2500+
S$0.028
(S$0.0305)
Min: 10 / Mult: 10
21ohm
± 1%
250mW
1206 [3216 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
200V
3.2mm
1.6mm
-55°C
155°C
AEC-Q200
2303363RL

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500+
S$0.033
(S$0.036)
1000+
S$0.025
(S$0.0272)
2500+
S$0.024
(S$0.0262)
Min: 500 / Mult: 10
21ohm
± 1%
125mW
0805 [2012 Metric]
Thick Film
Precision
ERJ-6EN Series
± 100ppm/°C
150V
2.01mm
1.25mm
-55°C
155°C
AEC-Q200
2302451RL

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500+
S$0.020
(S$0.0218)
2500+
S$0.013
(S$0.0142)
5000+
S$0.011
(S$0.012)
Min: 500 / Mult: 10
21ohm
± 1%
100mW
0402 [1005 Metric]
Thick Film
Precision
ERJ-2RK Series
± 100ppm/°C
50V
1.02mm
0.5mm
-55°C
155°C
AEC-Q200
2303363

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10+
S$0.058
(S$0.0632)
100+
S$0.042
(S$0.0458)
500+
S$0.033
(S$0.036)
1000+
S$0.025
(S$0.0272)
2500+
S$0.024
(S$0.0262)
Min: 10 / Mult: 10
21ohm
± 1%
125mW
0805 [2012 Metric]
Thick Film
Precision
ERJ-6EN Series
± 100ppm/°C
150V
2.01mm
1.25mm
-55°C
155°C
AEC-Q200
2138766RL

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500+
S$0.021
(S$0.0229)
1000+
S$0.018
(S$0.0196)
2500+
S$0.017
(S$0.0185)
Min: 500 / Mult: 10
21ohm
± 1%
125mW
0805 [2012 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
150V
2mm
1.25mm
-55°C
155°C
AEC-Q200
2139278RL

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500+
S$0.040
(S$0.0436)
1000+
S$0.030
(S$0.0327)
2500+
S$0.028
(S$0.0305)
Min: 500 / Mult: 10
21ohm
± 1%
250mW
1206 [3216 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
200V
3.2mm
1.6mm
-55°C
155°C
AEC-Q200
2141198RL

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500+
S$0.034
(S$0.0371)
1000+
S$0.019
(S$0.0207)
2500+
S$0.017
(S$0.0185)
Min: 500 / Mult: 10
21ohm
± 1%
100mW
0603 [1608 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
75V
1.55mm
0.85mm
-55°C
155°C
AEC-Q200
2838618

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1+
S$0.710
(S$0.7739)
10+
S$0.366
(S$0.3989)
100+
S$0.220
(S$0.2398)
500+
S$0.217
(S$0.2365)
1000+
S$0.157
(S$0.1711)
More Pricing...
Min: 1 / Mult: 1
21ohm
± 0.1%
100mW
0402 [1005 Metric]
Thin Film
High Power
RP73P Series
± 25ppm/°C
50V
1.02mm
0.5mm
-55°C
155°C
-
2838618RL

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500+
S$0.217
(S$0.2365)
1000+
S$0.157
(S$0.1711)
2000+
S$0.148
(S$0.1613)
10000+
S$0.138
(S$0.1504)
25000+
S$0.131
(S$0.1428)
More Pricing...
Min: 500 / Mult: 1
21ohm
± 0.1%
100mW
0402 [1005 Metric]
Thin Film
High Power
RP73P Series
± 25ppm/°C
50V
1.02mm
0.5mm
-55°C
155°C
-
1575441

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10+
S$0.349
(S$0.3804)
100+
S$0.126
(S$0.1373)
500+
S$0.097
(S$0.1057)
1000+
S$0.080
(S$0.0872)
2500+
S$0.072
(S$0.0785)
More Pricing...
Min: 10 / Mult: 10
21ohm
± 0.1%
125mW
0805 [2012 Metric]
Thin Film
General Purpose
MCTC05 Series
± 25ppm/°C
150V
2.01mm
1.25mm
-55°C
155°C
-
2302994

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Each (Supplied on Cut Tape)
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10+
S$0.033
(S$0.036)
100+
S$0.025
(S$0.0272)
500+
S$0.021
(S$0.0229)
1000+
S$0.013
(S$0.0142)
2500+
S$0.011
(S$0.012)
More Pricing...
Min: 10 / Mult: 10
21ohm
± 1%
100mW
0603 [1608 Metric]
Thick Film
Precision
ERJ-3EK Series
± 100ppm/°C
75V
1.6mm
0.85mm
-55°C
155°C
AEC-Q200
1575441RL

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500+
S$0.097
(S$0.1057)
1000+
S$0.080
(S$0.0872)
2500+
S$0.072
(S$0.0785)
5000+
S$0.062
(S$0.0676)
25000+
S$0.061
(S$0.0665)
Min: 500 / Mult: 1
21ohm
± 0.1%
125mW
0805 [2012 Metric]
Thin Film
General Purpose
MCTC05 Series
± 25ppm/°C
150V
2.01mm
1.25mm
-55°C
155°C
-
2302994RL

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500+
S$0.021
(S$0.0229)
1000+
S$0.013
(S$0.0142)
2500+
S$0.011
(S$0.012)
5000+
S$0.009
(S$0.0098)
Min: 500 / Mult: 50
21ohm
± 1%
100mW
0603 [1608 Metric]
Thick Film
Precision
ERJ-3EK Series
± 100ppm/°C
75V
1.6mm
0.85mm
-55°C
155°C
AEC-Q200
2688216RL

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500+
S$0.434
(S$0.4731)
1000+
S$0.423
(S$0.4611)
5000+
S$0.421
(S$0.4589)
Min: 500 / Mult: 1
21ohm
± 0.1%
100mW
0805 [2012 Metric]
Thin Film
Precision
RN73 Series
± 10ppm/°C
100V
2.01mm
1.25mm
-55°C
155°C
-
2688216

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1+
S$1.240
(S$1.3516)
50+
S$0.670
(S$0.7303)
100+
S$0.590
(S$0.6431)
250+
S$0.545
(S$0.594)
500+
S$0.434
(S$0.4731)
More Pricing...
Min: 1 / Mult: 1
21ohm
± 0.1%
100mW
0805 [2012 Metric]
Thin Film
Precision
RN73 Series
± 10ppm/°C
100V
2.01mm
1.25mm
-55°C
155°C
-
2121388

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Each (Supplied on Full Reel)
Full Reel
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10000+
S$0.015
(S$0.0164)
50000+
S$0.013
(S$0.0142)
100000+
S$0.012
(S$0.0131)
Min: 10000 / Mult: 10000
21ohm
± 1%
62.5mW
0402 [1005 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
50V
1mm
0.5mm
-55°C
155°C
AEC-Q200
2140606RL

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Each (Supplied on Cut Tape)
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500+
S$0.021
(S$0.0229)
2500+
S$0.018
(S$0.0196)
5000+
S$0.016
(S$0.0174)
Min: 500 / Mult: 10
21ohm
± 1%
62.5mW
0402 [1005 Metric]
Thick Film
General Purpose
CRCW e3 Series
± 100ppm/K
50V
1mm
0.5mm
-55°C
155°C
AEC-Q200
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