4990 ohm Fixed Resistors 149

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Part	Manufacturer	Resistor Type	Mounting Type	Resistance	Rated Power Dissipation (P)	Maximum Operating Temperature	Tolerance	Diameter (Lead)	Rated Temperature	Technology	Shape (Package)	Construction	Packing Method	Size Code	No. of Terminals	Package Style (Meter)	Terminal Shape	Sub-Category	Dimensions	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)
ERA6AEB4991V	Panasonic	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	.1 %		85 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, PUNCHED, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	25	MATTE TIN OVER NICKEL		.5 mm		100 V	IEC60115-8	2 mm	e3			AEC-Q200	1.25 mm
M55342K06B4E99RS3	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.15 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, 7 INCH	0705	2	SMT	WRAPAROUND			-65 Cel	100	TIN LEAD OVER NICKEL		.51 mm		50 V	ANTI-SULFUR	2.03 mm				MIL-PRF-55342	1.27 mm
M55342K06B4E99RS2	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.15 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, 7 INCH	0705	2	SMT	WRAPAROUND			-65 Cel	100	TIN LEAD OVER NICKEL		.51 mm		50 V	ANTI-SULFUR	2.03 mm				MIL-PRF-55342	1.27 mm
D55342K07B4E99RWB	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	WAFFLE PACK	1206	2	SMT	WRAPAROUND			-65 Cel	100	TIN LEAD OVER NICKEL		.51 mm		100 V	ANTI-SULFUR	3.18 mm				MIL-PRF-55342	1.6 mm
M55342K12B4E99RWB	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	WAFFLE PACK	0603	2	SMT	WRAPAROUND			-65 Cel	100	TIN LEAD OVER NICKEL		.46 mm		50 V	ANTI-SULFUR	1.6 mm				MIL-PRF-55342	.81 mm
AC0402FR-074K99L	Yageo	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.0625 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0402	2	SMT	WRAPAROUND			-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier		.32 mm		50 V	LASER TRIMMABLE	1 mm	e3			AEC-Q200	.5 mm
CR0805-FX-4991ELF	Bourns	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, Paper, 7 Inch	0805	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.5 mm		150 V		2 mm	e3				1.25 mm
CRCW08054991FRT1	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	100	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier		.45 mm		150 V	STANDARD: CECC40000/40400/40401-004,-006,-007,-802; IEC 60115-1	2 mm	e0				1.25 mm
CRCW08054991FRT5	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE		TR, PAPER, 10 INCH	0805	2		WRAPAROUND			-55 Cel	100	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier				150 V	STANDARD: CECC40000/40400/40401-004,-006,-007,-802; IEC 60115-1		e0
CRCW20104K99FKEFHP	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, BLISTER, 7 INCH	2010	2	SMT	WRAPAROUND			-55 Cel	100	TIN OVER NICKEL		.6 mm		400 V	RATED AC VOLTAGE: 400V	5 mm	e3			AEC-Q200	2.5 mm
CRCW08054991FRT2	Vishay Dale	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE		TR, PUNCHED PLASTIC, 7 INCH	0805	2		WRAPAROUND			-55 Cel	100	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier				100 V			e0
RNC55H4991FSB14	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	4990 ohm	.1 W	175 Cel	1 %	.64 mm	125 Cel	METAL FILM		Tubular	BULK		2	Axial	WIRE			-65 Cel	50	TIN LEAD	38.1 mm			200 V	PRECISION	6.35 mm	e0		2.39 mm	MIL-PRF-55182
AC0805FR-074K99L	Yageo	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier		.5 mm		150 V	LASER TRIMMABLE	2 mm	e3			AEC-Q200	1.25 mm
CPF-A-0402B4K99E1	TE Connectivity	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.063 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	0402	2	SMT	WRAPAROUND		1mm x .5mm x .3mm	-55 Cel	25			.3 mm		25 V	PRECISION	1 mm				AEC-Q200	.5 mm
CRCW06034K99FKEC	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 13 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.45 mm		75 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 75	1.55 mm	e3			AEC-Q200	.85 mm
CRT0603-FY-4991EAS	Bourns	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	THIN FILM		Rectangular	TR, Plastic, 7 Inch	0603	2	SMT	WRAPAROUND			-55 Cel	25	MATTE TIN OVER NICKEL		.45 mm		75 V	ANTI-SULFUR	1.55 mm	e3				.8 mm
ERJPB6B4991V	Panasonic	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	.1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PUNCHED, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	50			.6 mm		150 V	HIGH PRECISION, IEC60115-8	2 mm				AEC-Q200	1.25 mm
M55342H11B4E99RWS	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.05 W	150 Cel	1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	Waffle Pack	0402	2	SMT	WRAPAROUND			-65 Cel	50	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier		.8382 mm		30 V	NON-INDUCTIVE	1.016 mm	e0			MIL-PRF-55342	.5588 mm
RNC55H4991FSR36	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	4990 ohm	.1 W	175 Cel	1 %	.64 mm	125 Cel	METAL FILM		Tubular	TR, 11.5 INCH		2	Axial	WIRE			-65 Cel	50	TIN LEAD				200 V	PRECISION	6.35 mm	e0		2.39 mm	MIL-PRF-55182
RNC55H4991FSR3665	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	4990 ohm	.1 W	175 Cel	1 %	.64 mm	125 Cel	METAL FILM		Tubular	TR, 11.5 INCH		2	Axial	WIRE			-65 Cel	50	Tin/Lead (Sn/Pb)				200 V	PRECISION	6.35 mm	e0		2.39 mm	MIL-PRF-55182
RNC55H4991FSRE5	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	4990 ohm	.1 W	175 Cel	1 %	.64 mm	125 Cel	METAL FILM		Tubular	TR		2	Axial	WIRE			-65 Cel	50					200 V		6.35 mm			2.39 mm
TNPW12064K99BEEA	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	125 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	25	MATTE TIN OVER NICKEL		.55 mm		200 V	ANTI-SULFUR; LASER TRIMMABLE; PRECISION; RATED AC VOLTAGE (V): 200	3.2 mm	e3			AEC-Q200	1.6 mm
CRCW06034K99FKEB	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 11.25 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.45 mm		75 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 75	1.55 mm	e3			AEC-Q200	.85 mm
CRCW06034K99FKEBC	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 10 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.45 mm		75 V	RATED AC COLTAGE(V): 75	1.6 mm	e3				.8 mm
CRCW06034K99FKTB	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 11.25 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier		.45 mm		75 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 75	1.55 mm	e0			AEC-Q200	.85 mm
CRCW06034K99FKTC	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 13 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier		.45 mm		75 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 75	1.55 mm	e0			AEC-Q200	.85 mm
ERJ8ENF4991V	Panasonic	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PUNCHED, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.6 mm		200 V	PRECISION, STANDARD: IEC60115-8	3.2 mm	e3			AEC-Q200	1.6 mm
ERJPA3F4991V	Panasonic	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	1 %		105 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PUNCHED, 7 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.45 mm		150 V	HIGH PRECISION, IEC60115-8	1.6 mm	e3			AEC-Q200	.8 mm
M55342H11B4E99RT5	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.05 W	150 Cel	1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	0402	2	SMT	WRAPAROUND			-65 Cel	50	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier		.8382 mm		30 V	NON-INDUCTIVE	1.016 mm	e0			MIL-PRF-55342	.5588 mm
PATT0603E4991BGT1	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.15 W	250 Cel	.1 %		155 Cel	THIN FILM		Rectangular	TR	0603	2	SMT	WRAPAROUND			-55 Cel	25	Gold (Au) - with Nickel (Ni) barrier		.381 mm		75 V	ANTI-SULFUR, LASER TRIMMABLE, PRECISION	1.6256 mm	e4			AEC-Q200	.8128 mm
RT1206FRE074K99L	Yageo	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	1 %		70 Cel	THIN FILM		Rectangular	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	50	Matte Tin (Sn) - with Nickel (Ni) barrier		.55 mm		200 V	HIGH PRECISION, LASER TRIMMABLE	3.1 mm	e3				1.6 mm
TNPW04024K99BETD	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.063 W	125 Cel	.1 %		70 Cel	THIN FILM		Rectangular	TR, CARDBOARD, 7 INCH	0402	2	SMT	WRAPAROUND			-55 Cel	25	Tin/Lead (Sn/Pb) - with Nickel (Ni) barrier		.35 mm		50 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 50	1 mm	e0				.5 mm
CRCW08054K99FKTA	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	100	TIN LEAD OVER NICKEL		.45 mm		150 V	LASER TRIMMABLE, RATED AC VOLTAGE (V):150	2 mm	e0			AEC-Q200	1.25 mm
CRCW12064K99FKEAE6	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	125 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Chip	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND	FIXED RESISTOR		-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier		.5 mm	CRCW1206EN802	200 V	LASER TRIMMABLE; RATED AC VOLTAGE (V): 200	3.2 mm	e3	CRCW-EN802			1.6 mm
M55342K12B4B99RT0	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	150 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	0603	2	SMT	WRAPAROUND			-65 Cel	100	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier		.8382 mm		50 V	NON-INDUCTIVE	1.6256 mm	e0			MIL-PRF-55342	.8128 mm
RC1206FR-074K99L	Yageo	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier		.55 mm		200 V	LASER TRIMMABLE	3.1 mm	e3				1.6 mm
RN73R1ETTP4991B25	Koa Speer Electronics	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.063 W	155 Cel	.1 %		85 Cel	THIN FILM		Rectangular	TR, PUNCHED PAPER, 7 INCH	0402	2	SMT	WRAPAROUND			-55 Cel	25	MATTE TIN OVER NICKEL		.35 mm		50 V	ANTI-SULFUR, PRECISION	1 mm	e3			AEC-Q200	.5 mm
RT0603DRE074K99L	Yageo	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	.5 %		70 Cel	THIN FILM		Rectangular	TR, PAPER, 7 INCH	0603	2	SMT	WRAPAROUND			-55 Cel	50	Matte Tin (Sn) - with Nickel (Ni) barrier		.45 mm		75 V	HIGH PRECISION, LASER TRIMMABLE	1.6 mm	e3				.8 mm
CRCW02014K99FKED	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.05 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0201	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.23 mm		30 V	RATED AC VOLTAGE: 30V	.6 mm	e3				.3 mm
CRCW04024K99FKEE	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.063 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 13 INCH	0402	2	SMT	WRAPAROUND			-55 Cel	100	MATTE TIN OVER NICKEL		.35 mm		50 V	LASER TRIMMABLE, RATED AC VOLTAGE (V): 50	1 mm	e3			AEC-Q200	.5 mm
ERA6ARB4991V	Panasonic	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	155 Cel	.1 %		85 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, PUNCHED, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	10	TIN OVER NICKEL		.5 mm		100 V	IEC60115-8	2 mm	e3			AEC-Q200	1.25 mm
M55342E06B4B99RT5	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.15 W	150 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	0705	2	SMT	WRAPAROUND			-65 Cel	25	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier		.8382 mm		50 V	NON-INDUCTIVE	2.032 mm	e0			MIL-PRF-55342	1.27 mm
M55342K02B4B99RT5	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.125 W	150 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	0505	2	SMT	WRAPAROUND			-65 Cel	100	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier		.8382 mm		40 V	NON-INDUCTIVE	1.397 mm	e0			MIL-PRF-55342	1.27 mm
M55342K06B4E99RS6	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.15 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, 7 INCH	0705	2	SMT	WRAPAROUND			-65 Cel	100	TIN LEAD OVER NICKEL		.51 mm		50 V	ANTI-SULFUR	2.03 mm				MIL-PRF-55342	1.27 mm
RN73C1E4K99BTG	TE Connectivity	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.063 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	TAPE	0402	2	SMT	WRAPAROUND		1mm x .5mm x .3mm	-55 Cel	10	MATTE TIN OVER NICKEL		.3 mm		25 V	PRECISION	1 mm	e3				.5 mm
RN73C2A4K99BTDF	TE Connectivity	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.1 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	TR	0805	2	SMT	WRAPAROUND		2mm x 1.25mm x .55mm	-55 Cel	10	MATTE TIN OVER NICKEL		.55 mm		100 V	PRECISION	2 mm	e3				1.25 mm
RNCF0805BTE4K99	Stackpole Electronics	FIXED RESISTOR	SURFACE MOUNT	4990 ohm	.25 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier		.55 mm		150 V		2 mm	e3			AEC-Q200	1.25 mm
RWR71S4991FRS73	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	4990 ohm	2 W	250 Cel	1 %	.813 mm	25 Cel	WIRE WOUND		Tubular	TR		2	Axial	WIRE			-55 Cel	20	Tin/Lead (Sn60Pb40)	38.1 mm			99.8999 V		20.62 mm	e0		4.75 mm	MIL-PRF-39007

Fixed Resistors

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.