RT0402DRD071K78L YAGEO 1.78kΩ 0402 Chip Resistor

ElecSuppliers Part Number GuideAug 22, 2026

RT0402DRD071K78L is a YAGEO RT series thick film chip resistor designed for compact electronic circuits where accurate resistance and a small PCB footprint are required. The component has a nominal resistance of 1.78 kΩ and a tolerance of ±1%.

Its 0402 surface-mount package is designed for high-density PCB assemblies, making it suitable for applications where board space is limited and many passive components need to be placed close to integrated circuits.

RT0402DRD071K78L Key Specifications

RT0402DRD071K78L provides a resistance of 1.78 kΩ with a ±1% tolerance.

The component has a rated power of approximately 0.063 W and uses a 0402 surface-mount package. Its temperature coefficient is specified at ±100 ppm/°C.

The resistor is designed for a broad operating temperature range of approximately -55°C to +155°C.

Its small size makes it particularly suitable for compact consumer electronics, communication equipment, embedded systems and other high-density PCB designs.

1.78kΩ 0402 Resistor

The 1.78 kΩ resistance value can be used in a variety of signal and control circuits.

Common applications for this type of resistor include voltage dividers, pull-up and pull-down networks, transistor biasing, signal conditioning and current limiting.

The ±1% tolerance provides tighter resistance accuracy than a typical ±5% resistor. This can be useful when the resistor value has a direct influence on a circuit's voltage threshold or bias point.

Because the component uses a 0402 package, engineers can place it close to the associated IC or signal trace, helping keep PCB routing compact.

YAGEO RT Series

RT0402DRD071K78L belongs to the YAGEO RT series of thick film chip resistors.

The series covers a wide range of resistance values and package sizes, allowing designers to select different resistance values while maintaining a consistent resistor technology.

Thick film resistors are widely used because they provide a practical combination of cost, electrical performance and compact surface-mount construction.

The exact characteristics depend on the specific RT series size and part number, so the complete ordering code should be checked when selecting a replacement.

RT0402DRD071K78L Power Rating

The rated power of RT0402DRD071K78L is approximately 0.063 W.

Because the 0402 package is extremely small, its ability to dissipate heat is limited compared with larger packages such as 0805, 1206 and 2512.

For this reason, the expected power dissipation should be calculated carefully before using the resistor in a circuit.

At 1.78 kΩ, a relatively small current can produce measurable power dissipation. Designers should consider both continuous power and transient conditions when determining whether the 0402 package is appropriate.

0402 Surface-Mount Package

The 0402 package is one of the most widely used miniature chip-resistor formats.

Its approximate dimensions are 1.0 mm × 0.5 mm, allowing several components to be installed in an extremely small area.

This makes RT0402DRD071K78L suitable for smartphones, wireless devices, compact industrial electronics, sensors and other space-constrained products.

The small package does require more precise PCB assembly and inspection than larger resistors. Solder-pad dimensions, component placement accuracy and solder volume can all affect assembly quality.

RT0402DRD071K78L Temperature Characteristics

The specified temperature coefficient is approximately ±100 ppm/°C.

Temperature coefficient describes how the resistance changes as the component temperature changes. In precision circuits, this specification can affect the stability of voltage dividers, bias networks and other resistance-dependent functions.

The resistor's operating temperature range of approximately -55°C to +155°C provides flexibility for applications exposed to substantial temperature changes.

However, self-heating should also be considered because the resistor's actual temperature can be significantly higher than the surrounding ambient temperature when it is dissipating power.

RT0402DRD071K78L Applications

RT0402DRD071K78L can be used in consumer electronics, communication equipment, industrial control systems, embedded devices, sensor circuits and compact PCB assemblies.

Typical applications include:

Voltage divider circuits

Signal conditioning

Pull-up and pull-down networks

Transistor biasing

Current limiting

Feedback networks

The 1.78 kΩ value makes the component suitable for circuits where a specific resistance is required rather than a standard rounded value.

PCB Layout Considerations

The small 0402 package allows designers to place RT0402DRD071K78L very close to the IC or signal path it serves.

This can be beneficial in high-density PCB layouts because it reduces routing distance and saves board space.

However, the small footprint also requires careful PCB manufacturing. The recommended land pattern should be followed, and excessive solder paste can cause component movement or solder bridging during reflow.

For automated assembly, the component is generally supplied in a format suitable for high-speed pick-and-place production.

RT0402DRD071K78L Replacement

When selecting a replacement for RT0402DRD071K78L, the most important parameters include the 1.78 kΩ resistance, ±1% tolerance, power rating, temperature coefficient and 0402 package.

A replacement with the same resistance but a lower power rating may not be suitable.

Likewise, moving to a larger package may provide better thermal performance but could create PCB clearance or placement problems.

For high-density boards, the physical dimensions and terminal geometry should therefore be checked alongside the electrical specifications.

RT0402DRD071K78L Availability

RT0402DRD071K78L is listed as a YAGEO surface-mount resistor part and is supplied in packaging intended for automated PCB assembly.

Because 0402 resistors are widely used in mass-produced electronics, products in this package are generally supported by large-volume manufacturing and distribution channels.

Availability can vary according to resistance value and packaging quantity, so the exact RT0402DRD071K78L ordering code should be used when checking inventory.

RT0402DRD071K78L for Compact Electronics

RT0402DRD071K78L combines a 1.78 kΩ resistance, ±1% tolerance and approximately 0.063 W power rating in a miniature 0402 package.

Its small footprint makes it suitable for high-density PCB designs where board area is limited. The resistor can be used in signal, bias, feedback and voltage-divider circuits across a wide range of electronic equipment.

For new designs, engineers should evaluate power dissipation and thermal conditions carefully because the 0402 package has limited heat-dissipation capability. For replacement applications, matching both the electrical specifications and package size is important for reliable PCB assembly.