49.9 ohm Fixed Resistors 177

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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	Minimum Operating Temperature	Temperature Coef (ppm/Cel)	Terminal Finish	Height (Package)	Operating Voltage	Additional Features	Length (Package)	JESD-609 Code	Diameter (Package)	Reference Standard	Width (Package)
RC0402FR-1349R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.0625 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	1 mm	e3			.5 mm
ESR10EZPF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.4 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Chip	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND	FIXED RESISTOR	-55 Cel	100	TIN OVER NICKEL	.55 mm	150 V	STANDARD: AEC-Q200, LASER TRIMMABLE	2 mm	e3		AEC-Q200	1.25 mm
SFR2500004999FR500	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	49.9 ohm	.4 W	155 Cel	1 %	.58 mm	70 Cel	METAL FILM	TUBULAR PACKAGE	Cylindrical	TR		2	Axial	WIRE	FIXED RESISTOR	-55 Cel	100	MATTE TIN		250 V		6.5 mm	e3	2.5 mm
CR1206-FX-49R9ELF	Bourns	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.25 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, Paper, 7 Inch	1206	2	SMT	WRAPAROUND		-55 Cel	100	TIN OVER NICKEL	.55 mm	200 V		3.1 mm	e3			1.55 mm
MCR03EZPFX49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, Paper, 7 Inch	0603	2	SMT	WRAPAROUND		-55 Cel	100	TIN OVER NICKEL	.45 mm	50 V		1.6 mm	e3			.8 mm
RC0201FR-0749R9P	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.05 W	125 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0201	2	SMT	WRAPAROUND		-55 Cel	200	MATTE TIN OVER NICKEL	.23 mm	25 V	LASER TRIMMABLE	.6 mm	e3			.3 mm
RC0402FR-0749R9P	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 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 OVER NICKEL	.35 mm	50 V	LASER TRIMMABLE	1 mm	e3			.5 mm
KTR18EZPF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.25 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE		TR, PAPER, 7 INCH	1206	2		WRAPAROUND		-55 Cel	100	TIN		400 V			e3
MCR01MRTF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.063 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Chip	TR, PAPER, 7 INCH	0402	2	SMT	WRAPAROUND	FIXED RESISTOR	-55 Cel	100	Tin (Sn) - with Nickel (Ni) barrier	.35 mm	50 V		1 mm	e3		TS 16949	.5 mm
MCR10EZHF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 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	100	Tin (Sn) - with Nickel (Ni) barrier	.55 mm	150 V		2 mm	e3			1.25 mm
ESR18EZPF49R9	ROHM	FIXED RESISTOR		49.9 ohm	.33 W	155 Cel	1 %			METAL GLAZE/THICK FILM		Chip	TR, Paper, 7 Inch	1206	2	SMT		FIXED RESISTOR	-55 Cel	100	TIN OVER NICKEL	.55 mm	200 V		3.2 mm	e3		AEC-Q200	1.6 mm
MCR03ERTF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Chip	TR, PAPER, 7 INCH	0603	2	SMT	WRAPAROUND	FIXED RESISTOR	-55 Cel	100	Tin (Sn) - with Nickel (Ni) barrier	.45 mm	50 V		1.6 mm	e3		TS 16949	.8 mm
RC0402F49R9CS	Samsung Electro-mechanics	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.0313 W	125 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, Paper, 7 Inch	01005	2	SMT	WRAPAROUND		-55 Cel	300	TIN OVER NICKEL	.13 mm	15 V		.4 mm	e3			.2 mm
RC1608F49R9CS	Samsung Electro-mechanics	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, Paper, 7 Inch	0603	2	SMT	WRAPAROUND	FIXED RESISTOR	-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier	.45 mm	50 V		1.6 mm	e3			.8 mm
SFR03EZPF49R9	ROHM	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 7 INCH	0603	2	SMT	WRAPAROUND		-55 Cel	100		.45 mm	50 V	ANTI-SULFUR, RATED CURRENT: 1A	1.6 mm			AEC-Q200; IATF 16949	.8 mm
RCL122549R9FKEG	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	2 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, Blister, 7 Inch	1225	2	SMT	WRAPAROUND		-55 Cel	100	Tin (Sn) - with Nickel (Ni) barrier	.7 mm	200 V		3.2 mm	e3		AEC-Q200	6.3 mm
RT0805BRD0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.125 W	155 Cel	.1 %		70 Cel	THIN FILM		Rectangular	TR, PAPER, 7 INCH	0805	2	SMT	WRAPAROUND		-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier	.5 mm	150 V	HIGH PRECISION, LASER TRIMMABLE	2 mm	e3			1.25 mm
AC0201FR-0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.05 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0201	2	SMT	WRAPAROUND		-55 Cel	200	MATTE TIN OVER NICKEL	.23 mm	25 V	LASER TRIMMABLE	.6 mm			AEC-Q200	.3 mm
CPF349R900FEE36	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	49.9 ohm	3 W	230 Cel	1 %	.81 mm	70 Cel	METAL FILM	TUBULAR PACKAGE	Tubular	TR, 11.5 INCH		2	Axial	WIRE	Fixed Resistors	-65 Cel	25	Matte Tin (Sn)		500 V	FLAME PROOF, PRECISION	14.1 mm	e3	4.57 mm
CPF349R900FEEE6	Vishay Intertechnology	FIXED RESISTOR	THROUGH HOLE MOUNT	49.9 ohm	3 W	230 Cel	1 %	.81 mm	70 Cel	METAL FILM	TUBULAR PACKAGE	Tubular	TR, 7.5 INCH		2	Axial	WIRE	Fixed Resistors	-65 Cel	25	Matte Tin (Sn)		500 V	FLAME PROOF, PRECISION	14.1 mm	e3	4.57 mm
CR0402-16W-49R9FT	Venkel	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.063 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 7 INCH	0402	2	SMT	WRAPAROUND		-55 Cel	100	MATTE TIN OVER NICKEL	.35 mm	50 V		1 mm	e3			.5 mm
CRCW121049R9FKEAHP	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.75 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Rectangular	TR, PAPER, 7 INCH	1210	2	SMT	WRAPAROUND		-55 Cel	100	MATTE TIN OVER NICKEL	.6 mm	200 V	RATED AC VOLTAGE: 200V	3.2 mm	e3		AEC-Q200	2.5 mm
M55342K11B49D9RS2	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.05 W	150 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, 7 INCH	0402	2	SMT	WRAPAROUND		-65 Cel	100	TIN LEAD OVER NICKEL	.33 mm	30 V	ANTI-SULFUR	.99 mm			MIL-PRF-55342	.51 mm
MFR-50FRE52-49R9	Yageo	FIXED RESISTOR	THROUGH HOLE MOUNT	49.9 ohm	.5 W	155 Cel	1 %	.55 mm	70 Cel	METAL FILM	CYLINDRICAL PACKAGE	Tubular	TR, 12 INCH		2	Axial	WIRE	Fixed Resistors	-55 Cel	50	Matte Tin (Sn)		350 V		9 mm	e3	3.3 mm	AEC-Q200
MFR25SFRF52-49R9	Yageo	FIXED RESISTOR	THROUGH HOLE MOUNT	49.9 ohm	.25 W	155 Cel	1 %	.45 mm	70 Cel	METAL FILM	TUBULAR PACKAGE	Tubular	TR, 12 INCH		2	Axial	WIRE	Fixed Resistors	-55 Cel	100	Matte Tin (Sn)		200 V		3.4 mm	e3	1.9 mm	AEC-Q200
NTRH12B49R9CTRF	Nic Components	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.25 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, Paper, 7 Inch	1206	2	SMT	WRAPAROUND	FIXED RESISTOR	-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier	.55 mm	200 V		3.05 mm	e3			1.55 mm
PATT0603E49R9BGT1	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 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
RC0100FR-0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.0312 W	125 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0100	2	SMT	WRAPAROUND		-55 Cel	300	MATTE TIN OVER NICKEL	.13 mm	15 V	LASER TRIMMABLE	.4 mm	e3			.2 mm
RC0402FR-7D49R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.0625 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM	RECTANGULAR PACKAGE	Chip	TR, PAPER, 7 INCH	0402	2	SMT	WRAPAROUND	Fixed Resistors	-55 Cel	100	Matte Tin (Sn) - with Nickel (Ni) barrier	.35 mm	50 V	LASER TRIMMABLE	1 mm	e3			.5 mm
RC0603FR-0749R9P	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PAPER, 7 INCH	0603	2	SMT	WRAPAROUND		-55 Cel	100	MATTE TIN OVER NICKEL	.45 mm	75 V	LASER TRIMMABLE	1.6 mm	e3			.8 mm
RT0603BRE0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	.1 %		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
TNPW120649R9BEEA	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 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
WR04X49R9FTL	Walsin Technology	FIXED RESISTOR	SURFACE MOUNT	49.9 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	.35 mm	50 V	LASER TRIMMABLE; RATED AC VOLTAGE (V): 50	1 mm	e3			.5 mm

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.