Limited Stock

YAGEO RC0603FR-0749R9L 49.9 Ohm 1% 0603 SMD Thick Film Resistors 65pcs

Resistors • SKU RFB00432

$5.95

Lot of 65 YAGEO RC0603FR-0749R9L general-purpose thick-film surface-mount resistors supplied from surplus electronic inventory. These precision SMD chip resistors provide a resistance value of 49.9 ohms with ±1% tolerance and a 0.1W / 1/10 watt power rating in the extremely common 0603 surface-mount package, also known as 1608 metric.

The original inventory label identifies the manufacturer as YAGEO and shows part number RC0603FR-0749R9L. The label describes the component as a thick-film 0603 resistor with a 49.9 ohm value, 1% tolerance, and 0.1W rating. The original package label indicates an initial quantity of 100 pieces; the current RF Boneyard lot contains 65 pieces.

The RC0603FR-0749R9L is part of YAGEO's RC family of general-purpose thick-film chip resistors. Thick-film SMD resistors are among the most widely used passive components in modern electronics because they provide reliable resistance values in a compact package that works efficiently with automated surface-mount assembly.

This particular 49.9 ohm resistance value is useful wherever a designer requires a value very close to the common 50-ohm impedance found throughout RF and communications electronics. Depending on the circuit design, resistors in this range may be found in signal termination networks, impedance-related circuitry, bias networks, feedback paths, voltage-divider networks, damping circuits, filtering networks, interface circuitry, and general-purpose board-level electronics.

The 49.9 ohm value should not automatically be treated as a direct 50-ohm RF termination in every application, because frequency, resistor construction, PCB layout, parasitic reactance, power level, and circuit topology all affect RF behavior. However, this resistance value is commonly useful in circuits associated with nominal 50-ohm systems and is particularly relevant to RF experimenters, communications technicians, test-equipment builders, and electronic repair work.

The 0603 / 1608 metric package measures approximately 1.6mm by 0.8mm, providing a compact footprint while remaining large enough to be handled by experienced technicians performing manual SMD repair and rework.

Current distributor specifications identify this component as a 49.9 ohm ±1% thick-film chip resistor with a 100mW / 1/10W power rating, approximately ±100ppm/°C temperature coefficient, approximately 75V working voltage rating, and an operating temperature range of approximately -55°C to +155°C.

YAGEO describes its thick-film chip resistor products as suitable for a broad range of electronics including industrial, consumer, communications, automotive-related, alternative-energy, and general electronic applications. Thick-film construction provides a practical combination of small physical size, manufacturing economy, reliability, and stable electrical performance.

These resistors are useful for component-level PCB repair, radio and communications equipment service, test equipment, instrumentation, control circuitry, prototyping, laboratory work, audio equipment, power-supply support circuitry, signal conditioning, and general electronics repair.

HISTORICAL:
YAGEO Corporation was founded in Taiwan in 1977 and developed into one of the world's major manufacturers of passive electronic components. The company became especially important in the development and large-scale manufacture of chip resistors as the electronics industry moved away from traditional leaded components and increasingly adopted compact surface-mount technology.

YAGEO states that it became the world's number-one supplier in the global chip-resistor market in 1990. From its strong position in resistor manufacturing, the company expanded its passive-component portfolio into capacitors, inductors, wireless components, circuit-protection products, and other component technologies used throughout the global electronics industry.

The growth of companies such as YAGEO closely paralleled one of the largest technological changes in electronic manufacturing: the transition from through-hole circuit boards populated with axial lead resistors to densely packed automated surface-mount assemblies.

Earlier electronic equipment commonly used cylindrical carbon-composition, carbon-film, or metal-film resistors with wire leads inserted through holes in a printed circuit board. Although these components remain important in vintage electronics and certain modern applications, they occupy considerably more PCB area and require a different assembly process.

Surface-mount chip resistors dramatically changed circuit-board manufacturing. Their rectangular ceramic construction allowed thousands of components to be supplied on reels, positioned at high speed by automated pick-and-place machines, soldered during reflow processing, and packed into increasingly smaller electronic devices.

Standardized package sizes such as 1206, 0805, 0603, 0402, and even smaller formats became fundamental building blocks of modern electronics. The 0603 package used by this YAGEO resistor became particularly widespread because it offers a useful balance between compact size, automated manufacturing efficiency, and practical electrical performance.

The RC0603FR-0749R9L represents this mature generation of surface-mount resistor technology. Its 49.9 ohm value also makes it especially interesting for RF Boneyard inventory because values near 50 ohms have long played an important role in communications and RF electronics, where 50-ohm systems became a dominant standard for transmitters, receivers, coaxial systems, laboratory instruments, and RF test equipment.

This exact RC0603FR-0749R9L remains an ACTIVE production component and is not obsolete at this time. It therefore serves both as modern production stock and as useful replacement inventory for existing electronic equipment already designed around this exact resistance value, tolerance, power rating, and SMD footprint.

These components are NOS surplus electronic inventory and appear unused. They remain in surface-mount carrier tape. The original inventory label may show normal warehouse storage, marking, and handling wear. Original package quantity was 100 pieces; current sale quantity has been physically identified as 65 pieces.

Sale is for 65 pieces.