49.9 ohm Fixed Resistors 21

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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	Height (Package)	Operating Voltage	Additional Features	Length (Package)	JESD-609 Code	Diameter (Package)	Reference Standard	Width (Package)
RT1206FRD0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.25 W	155 Cel	1 %		70 Cel	THIN FILM		Rectangular	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier	.55 mm	200 V	HIGH PRECISION, LASER TRIMMABLE	3.1 mm	e3			1.6 mm
RNCF2512BTC49R9	Stackpole Electronics	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	1 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, EMBOSSED PLASTIC, 7 INCH	2512	2	SMT	WRAPAROUND			-55 Cel	50	Matte Tin (Sn) - with Nickel (Ni) barrier	.55 mm	200 V		6.3 mm	e3		AEC-Q200	3.1 mm
RNCF2512DKE49R9	Stackpole Electronics	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	1 W	155 Cel	.5 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR, 7 INCH	2512	2	SMT	WRAPAROUND			-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier	.55 mm	200 V		6.3 mm	e3		AEC-Q200	3.1 mm
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
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
MCR01MZPF49R9	ROHM	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	TIN OVER NICKEL	.35 mm	50 V		1 mm	e3			.5 mm
M55342E09B49D9RWS	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	1 W	150 Cel	1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	Waffle Pack	2512	2	SMT	WRAPAROUND			-65 Cel	25	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier	.8382 mm	200 V	NON-INDUCTIVE	6.5786 mm	e0		MIL-PRF-55342	3.1496 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
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
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
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
RN732ATTD49R9B25	Koa Speer Electronics	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.1 W	155 Cel	.1 %		70 Cel	THIN FILM		Rectangular	TR, PUNCHED PAPER, 7 INCH	0805	2	SMT	WRAPAROUND			-55 Cel	25	MATTE TIN OVER NICKEL	.5 mm	150 V		2 mm	e3			1.25 mm
PCAN1206E49R9BST5	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	2 W	155 Cel	.1 %		70 Cel	THIN FILM	RECTANGULAR PACKAGE	Rectangular	TR	1206	2	SMT	WRAPAROUND			-55 Cel	25	TIN SILVER COPPER OVER NICKEL	.381 mm	100 V	FLAME PROOF, PRECISION	3.2 mm				1.6 mm
ERJ1GEF49R9C	Panasonic	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.05 W	125 Cel	1 %		70 Cel	METAL GLAZE/THICK FILM		Rectangular	TR, PRESSED, 7 INCH	0201	2	SMT	WRAPAROUND			-55 Cel	200	Matte Tin (Sn) - with Nickel (Ni) barrier	.23 mm	25 V	PRECISION	.6 mm	e3		IEC60115-8	.3 mm
RT1206CRD0749R9L	Yageo	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.25 W	155 Cel	.25 %		70 Cel	THIN FILM		Rectangular	TR, PAPER, 7 INCH	1206	2	SMT	WRAPAROUND			-55 Cel	25	Matte Tin (Sn) - with Nickel (Ni) barrier	.55 mm	200 V	HIGH PRECISION, LASER TRIMMABLE	3.1 mm	e3			1.6 mm
RU73X1E49R9LTDF	TE Connectivity	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	.063 W	155 Cel	.01 %		70 Cel	THIN FILM		RECTANGULAR PACKAGE	TR	0402	2	SMT	WRAPAROUND		1mm x .5mm x .3mm	-55 Cel	3		.3 mm	25 V	ULTRA PRECISION	1 mm				.5 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
M55342E09B49A9RWI	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 ohm	1 W	150 Cel	.1 %		70 Cel	THIN FILM		Rectangular	Waffle Pack	2512	2	SMT	WRAPAROUND			-65 Cel	25	Tin/Lead (Sn60Pb40) - with Nickel (Ni) barrier	.8382 mm	200 V	NON-INDUCTIVE	6.5786 mm	e0		MIL-PRF-55342	3.1496 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
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
CRCW060349R9FKECC	Vishay Intertechnology	FIXED RESISTOR	SURFACE MOUNT	49.9 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	RATED AC COLTAGE(V): 75	1.6 mm	e3			.8 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.