AF2512FK-071KL YAGEO 1kΩ 1W 2512 Chip Resistor

ElecSuppliers Part Number GuideAug 22, 2026

AF2512FK-071KL is a YAGEO AF series thick film chip resistor designed for automotive and other demanding electronic applications. It provides a resistance of 1 kΩ, a tolerance of ±1% and a rated power of 1 W.

The resistor uses a large 2512 surface-mount package and combines automotive qualification with moisture-resistant and anti-sulfur characteristics. This makes it a useful option for PCB designs where a compact resistor needs to handle relatively high power while maintaining stable electrical performance.

AF2512FK-071KL Key Specifications

AF2512FK-071KL has a nominal resistance of 1 kΩ with a ±1% tolerance. Its rated power is 1 W and its temperature coefficient is ±100 ppm/°C.

The component uses a 2512 package with dimensions of approximately 6.35 mm × 3.20 mm. The maximum seated height is about 0.67 mm.

Its operating temperature range is approximately -55°C to +155°C.

The resistor is manufactured using thick film technology and has two surface-mount terminals.

1kΩ 1W Thick Film Resistor

The 1 kΩ resistance value is widely used in electronic circuits for voltage division, biasing, current limiting, signal conditioning and control functions.

The ±1% tolerance provides relatively tight resistance accuracy, which can be useful when the resistor forms part of a voltage divider or another circuit where resistance variation affects the final operating point.

The 1 W power rating gives AF2512FK-071KL substantially more power capability than smaller chip resistors commonly used for low-power signal circuits.

However, the actual usable power depends on temperature and PCB conditions. When the resistor operates close to its maximum rating, appropriate power derating should be considered.

YAGEO AF Series Resistor

AF2512FK-071KL belongs to the YAGEO AF series of thick film chip resistors.

The series includes multiple resistance values while maintaining the same general 2512 package format. This allows designers to select different resistance values without significantly changing the PCB footprint.

The AF series also incorporates characteristics intended for demanding environments, including anti-sulfur protection, moisture resistance and automotive AEC-Q200 qualification.

These features make the series particularly relevant to automotive electronics and industrial equipment where component reliability can be more important than simply minimizing cost or package size.

AF2512FK-071KL Automotive Applications

Automotive electronics can expose passive components to temperature changes, electrical transients, vibration and long operating periods.

A 1 W resistor in a 2512 package can be useful in automotive control modules, power circuits, lighting systems, sensor interfaces and other electronic assemblies where higher power dissipation is required.

The AEC-Q200 qualification of the AF series is relevant for designers developing automotive products that require qualified passive components.

The exact qualification requirements of the final application should still be checked against the relevant automotive design standards.

Anti-Sulfur Chip Resistor

One of the notable characteristics of AF2512FK-071KL is its anti-sulfur construction.

Sulfur-containing environments can cause problems for certain resistor structures. Sulfur can react with exposed conductive materials and, over time, contribute to increased resistance or open-circuit failures.

Anti-sulfur construction is intended to provide additional protection against this type of environmental degradation.

This can be valuable in automotive and industrial equipment, especially when electronic assemblies may be exposed to environments containing sulfur compounds.

AF2512FK-071KL Power Rating

The 1 W power rating is one of the main advantages of the 2512 package.

When current passes through a resistor, electrical energy is converted into heat according to the relationship between resistance and current. At 1 kΩ, even relatively small currents can produce measurable power dissipation.

For example, a current of 10 mA through a 1 kΩ resistor produces 0.1 W of power. A current of approximately 31.6 mA would produce about 1 W under ideal calculation conditions.

Actual component operation should include appropriate thermal margin rather than operating continuously at the absolute maximum rating.

2512 Surface-Mount Package

AF2512FK-071KL uses the 2512 package, also known as 6332 in metric package notation.

The relatively large surface-mount body provides more physical area for heat dissipation than smaller resistor packages such as 0603, 0805 or 1206.

The package measures approximately 6.35 mm in length and 3.20 mm in width, making it suitable for applications where board space is available for a higher-power resistor.

During PCB design, engineers should follow the recommended land pattern and consider the copper area around the component when thermal performance is important.

AF2512FK-071KL Temperature Performance

The specified operating temperature range extends from approximately -55°C to +155°C.

The ±100 ppm/°C temperature coefficient indicates the expected resistance variation caused by temperature changes.

For circuits where the 1 kΩ resistance directly affects voltage or current, temperature coefficient can be an important design parameter.

The actual resistor temperature is influenced by both ambient temperature and self-heating. Therefore, a resistor operating at high power in a warm automotive environment may require significant derating even though its nominal power rating is 1 W.

AF2512FK-071KL Applications

AF2512FK-071KL can be used in automotive control electronics, industrial equipment, power management circuits, lighting systems, sensor circuits and general-purpose electronic assemblies.

Typical functions include voltage division, current limiting, biasing, signal conditioning and power dissipation.

The 1 kΩ value is particularly common in control and interface circuits, while the 1 W rating allows the component to be used in positions where a standard low-power 1/8 W or 1/4 W resistor would not provide sufficient margin.

AF2512FK-071KL Replacement Considerations

When replacing AF2512FK-071KL, engineers should match the resistance value, tolerance, power rating, temperature coefficient and package size.

A replacement 1 kΩ resistor with a smaller package may not provide the same thermal performance. Similarly, a resistor without the required automotive qualification or anti-sulfur characteristics may not be appropriate for the original application.

The 2512 footprint and terminal dimensions should also be checked before selecting an alternative.

For automotive designs, qualification and environmental characteristics should be treated as part of the replacement specification rather than optional features.

AF2512FK-071KL Availability

AF2512FK-071KL remains listed as an active YAGEO product in current component distributor databases. The part is available in tape-and-reel packaging for automated surface-mount production.

Current distributor listings indicate that the component may have a manufacturer lead time rather than being continuously held as local stock. For production planning, buyers should therefore check current inventory and lead time before placing larger orders.

Using the complete manufacturer part number is important because the AF2512 family contains many resistance values with very similar ordering codes.

AF2512FK-071KL for Automotive and Industrial PCB Designs

AF2512FK-071KL combines a 1 kΩ resistance, ±1% tolerance and 1 W power rating with a 2512 thick film package.

Its AEC-Q200 automotive qualification, anti-sulfur construction and moisture-resistant characteristics make it suitable for applications where environmental reliability is an important consideration.

For new designs, engineers should evaluate power dissipation, PCB thermal conditions, operating temperature and resistance stability together. For replacement applications, matching the complete electrical, mechanical and environmental characteristics is more reliable than selecting another 1 kΩ resistor based only on resistance value.