Part | RoHS | Manufacturer | Resistor Type | Mounting Type | Resistance | Rated Power Dissipation (P) | Maximum Operating Temperature | Tolerance | Diameter (Lead) | Spacing (Lead) | Rated Temperature | No. of Functions | Technology | Shape (Package) | No. of Elements | Construction | Packing Method | Size Code | Network Type | No. of Terminals | Package Style (Meter) | Terminal Shape | Sub-Category | Dimensions | First Element Resistance | Minimum Operating Temperature | Temperature Coef (ppm/Cel) | Terminal Finish | Length (Lead) | Height (Package) | Manufacturer Series | Operating Voltage | Additional Features | Length (Package) | JESD-609 Code | Series | Diameter (Package) | Reference Standard | Width (Package) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.0625 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0402 |
2 |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
50 V |
LASER TRIMMABLE |
e3 |
|||||||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.1 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0603 |
2 |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
50 V |
LASER TRIMMABLE |
e3 |
|||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.5 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
Rectangular |
TR, PAPER, 7 INCH |
0805 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
100 |
TIN OVER NICKEL |
.5 mm |
150 V |
RATED AC VOLTAGE: 150V |
2 mm |
e3 |
AEC-Q200 |
1.25 mm |
|||||||||||||
|
Panasonic |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.5 W |
175 Cel |
1 % |
105 Cel |
METAL GLAZE/THICK FILM |
Rectangular |
TR, PUNCHED, 7 INCH |
0805 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
-100,600 |
.6 mm |
400 V |
IEC60115-8 |
2 mm |
AEC-Q200 |
1.25 mm |
||||||||||||||||
Vishay Intertechnology |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
250 Cel |
5 % |
.813 mm |
25 Cel |
WIRE WOUND |
TUBULAR PACKAGE |
Welded |
TR |
2 |
Axial |
WIRE |
FIXED RESISTOR |
-65 Cel |
50 |
Tin/Lead (Sn/Pb) |
38.1 mm |
4.517 V |
14.27 mm |
e0 |
4.78 mm |
|||||||||||||||
Vishay Intertechnology |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
4 W |
250 Cel |
5 % |
.813 mm |
25 Cel |
WIRE WOUND |
TUBULAR PACKAGE |
Welded |
TR |
2 |
Axial |
WIRE |
FIXED RESISTOR |
-65 Cel |
50 |
Tin/Lead (Sn/Pb) |
38.1 mm |
5.215 V |
12.7 mm |
e0 |
4.78 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
50 W |
5 % |
25 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
BULK, TRAY |
2 |
Chassis Mount |
LUG |
72.5mm x 30mm x 17mm |
50 |
17 mm |
1250 V |
RATED POWER DISSIPATED USING HEAT SINK: 50W, RATED AC VOLTAGE (V): 1250 |
51 mm |
30 mm |
||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
4 W |
200 Cel |
5 % |
15.2 mm |
WIRE WOUND |
TUBULAR PACKAGE |
Cylindrical |
BULK, BOX |
2 |
Radial |
FLAT |
FIXED RESISTOR |
24.2mm x 5mm |
-55 Cel |
-80, 40 |
24.2 mm |
5 mm |
||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
3 W |
275 Cel |
5 % |
20 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
TR |
4122 |
2 |
SMT |
WRAPAROUND |
10.5mm x 5.5mm x 5mm |
-55 Cel |
200 |
5 mm |
500 V |
FLAME PROOF |
10.5 mm |
5.5 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
100 W |
5 % |
25 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
BULK, TRAY |
2 |
Chassis Mount |
LUG |
87.5mm x 47.5mm x 26mm |
50 |
26 mm |
1900 V |
65.5 mm |
47.5 mm |
|||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
300 W |
5 % |
25 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
BULK, TRAY |
2 |
Chassis Mount |
STUD |
180mm x 41mm x 71.4mm |
50 |
42 mm |
2500 V |
RATED AC VOLTAGE (V): 2500 |
128 mm |
73 mm |
||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.125 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0805 |
2 |
WRAPAROUND |
-55 Cel |
200 |
MATTE TIN OVER NICKEL |
150 V |
RATED AC VOLTAGE (V) : 150 |
e3 |
AEC-Q200 |
||||||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.0625 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
Rectangular |
TR, PAPER, 7 INCH |
0402 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
.35 mm |
50 V |
LASER TRIMMABLE |
1 mm |
e3 |
.5 mm |
|||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.25 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
Rectangular |
TR, PAPER, 7 INCH |
1206 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
.55 mm |
200 V |
LASER TRIMMABLE |
3.1 mm |
e3 |
1.6 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
3 W |
155 Cel |
5 % |
70 Cel |
THICK FILM |
RECTANGULAR PACKAGE |
RECTANGULAR PACKAGE |
TR |
2512 |
2 |
SMT |
WRAPAROUND |
6.35mm x 3.2mm x .55mm |
-55 Cel |
400 |
1.1 mm |
250 V |
6.35 mm |
AEC-Q200 |
3.2 mm |
|||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.063 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0402 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
200 |
MATTE TIN OVER NICKEL |
.35 mm |
50 V |
RATED AC VOLTAGE: 50 V |
1 mm |
e3 |
AEC-Q200 |
.5 mm |
||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.1 W |
155 Cel |
5 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0603 |
2 |
WRAPAROUND |
Fixed Resistors |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
RC |
50 V |
LASER TRIMMABLE |
e3 |
|||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
100 W |
260 Cel |
5 % |
40 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
BULK, BOX |
2 |
WIRE |
110mm x 60mm x 15mm |
200 |
1100 V |
|||||||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
1.5 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
Rectangular |
TR, BLISTER, 7 INCH |
2512 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
100 |
MATTE TIN OVER NICKEL |
.6 mm |
500 V |
RATED AC VOLTAGE: 500V |
6.3 mm |
e3 |
AEC-Q200 |
3.15 mm |
|||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.0625 W |
155 Cel |
5 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR, PAPER, 7 INCH |
0402 |
2 |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
50 V |
LASER TRIMMABLE |
e3 |
|||||||||||||||||||
|
Stackpole Electronics |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
3 W |
275 Cel |
5 % |
70 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
TR, PLASTIC, 13 INCH |
6227 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
100 |
Matte Tin (Sn) |
6.35 mm |
4.5166 V |
15.88 mm |
e3 |
6.99 mm |
|||||||||||||||
|
Tt Electronics Plc |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
200 Cel |
5 % |
.8 mm |
25 Cel |
WIRE WOUND |
TUBULAR PACKAGE |
Tubular |
AMMO PACK |
2 |
Axial |
WIRE |
-55 Cel |
200 |
TIN SILVER COPPER OVER NICKEL |
100 V |
12.7 mm |
5.6 mm |
|||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
5 W |
5 % |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR |
4320 |
2 |
WRAPAROUND |
200 |
300 V |
|||||||||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
350 Cel |
5 % |
.8 mm |
25 Cel |
WIRE WOUND |
TUBULAR PACKAGE |
Tubular |
TR |
2 |
Axial |
WIRE |
Fixed Resistors |
75 |
Tin/Silver/Copper (Sn99.0Ag0.3Cu0.7) |
25 mm |
120 V |
FLAME PROOF, STANDARD: CECC40201-001 |
12 mm |
e8 |
5.5 mm |
||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
5 W |
275 Cel |
5 % |
20 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
TR |
5329 |
2 |
SMT |
WRAPAROUND |
13.5mm x 7.3mm x 6.8mm |
-55 Cel |
200 |
6.8 mm |
500 V |
FLAME PROOF |
13.5 mm |
7.3 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
5 W |
1 % |
WIRE WOUND |
RECTANGULAR PACKAGE |
TR |
5329 |
2 |
WRAPAROUND |
13.5mm x 7.3mm x 6.8mm |
200 |
500 V |
||||||||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
5 W |
1 % |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
TR |
4320 |
2 |
WRAPAROUND |
200 |
300 V |
|||||||||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
250 Cel |
5 % |
.8 mm |
40 Cel |
WIRE WOUND |
Tubular |
AMMO PACK |
2 |
Axial |
WIRE |
-55 Cel |
-10,-80 |
MATTE TIN |
4.5167 V |
FLAME PROOF |
13 mm |
e3 |
4.8 mm |
||||||||||||||||
|
Panasonic |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
5 W |
200 Cel |
5 % |
.8 mm |
70 Cel |
METAL FILM |
Tubular |
BULK |
2 |
Axial |
WIRE |
-55 Cel |
200 |
Tin (Sn) |
38 mm |
500 V |
FLAME PROOF, IEC60115-4 |
24 mm |
e3 |
8 mm |
IEC60115-2 |
||||||||||||||
|
Yageo |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
.1667 W |
155 Cel |
1 % |
.45 mm |
70 Cel |
METAL FILM |
CYLINDRICAL PACKAGE |
Tubular |
Ammo Pack |
2 |
Axial |
WIRE |
Fixed Resistors |
-55 Cel |
100 |
Matte Tin (Sn) |
200 V |
3.4 mm |
e3 |
1.9 mm |
AEC-Q200 |
||||||||||||||
|
Ohmite Manufacturing |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
2 W |
220 Cel |
10 % |
.8 mm |
70 Cel |
CERAMIC COMPOSITION |
TUBULAR PACKAGE |
Cylindrical |
TR, 13 INCH |
2 |
Axial |
WIRE |
Fixed Resistors |
-40 Cel |
1600 |
TIN COPPER |
38 mm |
400 V |
19 mm |
e2 |
7 mm |
||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
15 W |
5 % |
25 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
Rectangular |
BULK, TRAY |
8383 |
2 |
Chassis Mount |
LUG |
FIXED RESISTOR |
36.5mm x 21mm x 11mm |
50 |
11 mm |
265 V |
RATED POWER WITH HEATSINK: 15 |
21 mm |
21 mm |
||||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.1 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
Rectangular |
TR, PAPER, 7 INCH |
0603 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
.45 mm |
75 V |
LASER TRIMMABLE |
1.6 mm |
e3 |
.8 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
235 Cel |
5 % |
.7 mm |
70 Cel |
METAL OXIDE FILM |
TUBULAR PACKAGE |
Tubular |
AMMO PACK |
2 |
Axial |
WIRE |
Fixed Resistors |
16mm x 5.5mm |
-55 Cel |
350 |
28 mm |
350 V |
FLAME PROOF |
16 mm |
5.5 mm |
||||||||||||||
|
Tt Electronics Plc |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
3 W |
155 Cel |
5 % |
.81 mm |
25 Cel |
WIRE WOUND |
Tubular |
AMMO PACK |
2 |
Axial |
WIRE |
-55 Cel |
200 |
24.55 mm |
4.517 V |
FLAME PROOF |
14.5 mm |
5.2 mm |
|||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
7 W |
5 % |
WIRE WOUND |
TUBULAR PACKAGE |
AMMO PACK |
2 |
WIRE |
22mm x 8.5mm |
200 |
350 V |
|||||||||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.33 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
Rectangular |
TR, PAPER, 7 INCH |
0603 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
100 |
MATTE TIN OVER NICKEL |
.45 mm |
75 V |
RATED AC VOLTAGE: 75V |
1.6 mm |
e3 |
AEC-Q200 |
.85 mm |
|||||||||||||
|
Ohmite Manufacturing |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
100 W |
200 Cel |
5 % |
25 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
RECTANGULAR PACKAGE |
2 |
Chassis Mount |
LUG |
100 |
24.1 mm |
1900 V |
FREE AIR POWER: 30W |
65.2 mm |
47.5 mm |
|||||||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
1 W |
155 Cel |
1 % |
70 Cel |
THIN FILM |
Cylindrical |
TR, BLISTER, 7 INCH |
2309 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
50 |
MATTE TIN OVER NICKEL |
350 V |
ANTI-SULFUR; LASER TRIMMABLE; RATED AC VOLTAGE (V): 350; STANDARD: CECC40401-803 |
5.8 mm |
2.2 mm |
AEC-Q200 |
||||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
1 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
Rectangular |
TR, EMBOSSED PLASTIC, 7 INCH |
2512 |
2 |
SMT |
WRAPAROUND |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
.55 mm |
200 V |
LASER TRIMMABLE |
6.35 mm |
e3 |
3.1 mm |
|||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
2 W |
200 Cel |
10 % |
CERAMIC COMPOSITION |
TUBULAR PACKAGE |
BULK, BOX |
2 |
WIRE |
19mm x 7mm |
-40 Cel |
1300 |
400 V |
|||||||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
100 W |
260 Cel |
5 % |
40 Cel |
WIRE WOUND |
RECTANGULAR PACKAGE |
BULK, BOX |
2 |
WIRE |
110mm x 60mm x 15mm |
200 |
1100 V |
|||||||||||||||||||||||
|
Yageo |
FIXED RESISTOR |
SURFACE MOUNT |
6.8 ohm |
.125 W |
155 Cel |
1 % |
70 Cel |
METAL GLAZE/THICK FILM |
RECTANGULAR PACKAGE |
Chip |
TR, PAPER, 7 INCH |
0805 |
2 |
SMT |
WRAPAROUND |
Fixed Resistors |
-55 Cel |
200 |
Matte Tin (Sn) - with Nickel (Ni) barrier |
.5 mm |
RC |
150 V |
LASER TRIMMABLE |
2 mm |
e3 |
2322734X |
1.25 mm |
|||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
2 W |
200 Cel |
10 % |
.8 mm |
70 Cel |
CERAMIC COMPOSITION |
Tubular |
TAPE |
2 |
Axial |
WIRE |
19mm x 7mm |
-40 Cel |
1300 |
38 mm |
400 V |
19 mm |
7 mm |
|||||||||||||||||
|
Ohmite Manufacturing |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
100 W |
175 Cel |
5 % |
25 Cel |
RECTANGULAR PACKAGE |
2 |
FLAT |
-65 Cel |
100 |
700 V |
NON INDUCTIVE, FREE AIR POWER: 3.5W |
||||||||||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
CHASSIS MOUNT |
6.8 ohm |
100 W |
125 Cel |
10 % |
THICK FILM |
RECTANGULAR PACKAGE |
Rectangular |
BULK, TRAY |
2 |
Chassis Mount |
SCREW |
Fixed Resistors |
38mm x 25.5mm x 21mm |
-55 Cel |
150 |
15.5 mm |
500 V |
37.8 mm |
25.4 mm |
|||||||||||||||||
|
TE Connectivity |
FIXED RESISTOR |
THROUGH HOLE MOUNT |
6.8 ohm |
.25 W |
125 Cel |
5 % |
.6 mm |
70 Cel |
CARBON COMPOSITION |
TUBULAR PACKAGE |
Cylindrical |
AMMO PACK |
2 |
Axial |
WIRE |
Fixed Resistors |
6.3mm x 2.4mm |
-55 Cel |
-700,400 |
27 mm |
250 V |
6.3 mm |
2.4 mm |
|||||||||||||||
|
Vishay Intertechnology |
FIXED RESISTOR |
PANEL MOUNT |
6.8 ohm |
750 W |
350 Cel |
5 % |
40 Cel |
WIRE WOUND |
Tubular |
BULK |
2 |
Panel Mount |
LUG |
-55 Cel |
-10,-80 |
370 mm |
52 mm |
Fixed resistors are passive electronic components that are used to resist the flow of electric current in a circuit. They have a fixed value of resistance, meaning their resistance cannot be adjusted once they are manufactured. They are commonly used to set the bias of transistors, control the gain of amplifiers, or limit the current flowing through an LED. Fixed resistors come in various sizes, power ratings, and tolerances.
There are two types of fixed resistors: through-hole and surface mount. Through-hole resistors have leads that are inserted into holes on the printed circuit board (PCB), while surface mount resistors have terminals that are soldered directly to the surface of the PCB. Through-hole resistors are larger and easier to work with, but surface mount resistors are smaller and more suitable for miniaturized electronic devices.
Fixed resistors can be made from a variety of materials, including carbon, metal, and wire-wound. Carbon resistors are inexpensive and widely used, but they have a lower tolerance and are more susceptible to noise than other types. Metal film resistors have a higher tolerance and better stability, making them ideal for use in precision circuits. Wire-wound resistors have a higher power rating and are used in high power applications, such as power supplies and amplifiers.