ERJ-2RKF1001X vs ERJ-3EKF2001V
| Part Number |
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| Category | Chip Resistor - Surface Mount | Chip Resistor - Surface Mount |
| Manufacturer | Panasonic Electronic Components | Panasonic Electronic Components |
| Description | RES SMD 1K OHM 1% 1/10W 0402 | RES SMD 2K OHM 1% 1/10W 0603 |
| Package | Cut Tape (CT) | Cut Tape (CT) |
| Series | ERJ-2RK | ERJ-3EK |
| Features | Automotive AEC-Q200 | Automotive AEC-Q200 |
| Operating Temperature | -55°C ~ 155°C | -55°C ~ 155°C |
| Package / Case | 0402 (1005 Metric) | 0603 (1608 Metric) |
| Supplier Device Package | 0402 | 0603 |
| Tolerance | ±1% | ±1% |
| Temperature Coefficient | ±100ppm/°C | ±100ppm/°C |
| Size / Dimension | 0.039" L x 0.020" W (1.00mm x 0.50mm) | 0.063" L x 0.031" W (1.60mm x 0.80mm) |
| Power (Watts) | 0.1W, 1/10W | 0.1W, 1/10W |
| Ratings | AEC-Q200 | AEC-Q200 |
| Height - Seated (Max) | 0.016\" (0.40mm) | 0.022\" (0.55mm) |
| Failure Rate | - | - |
| Resistance | 1 kOhms | 2 kOhms |
| Composition | Thick Film | Thick Film |
| Number of Terminations | 2 | 2 |
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1. What is a Chip Resistor?
Chip Resistor, also known as chip fixed resistors, are resistors designed for surface mounting. They can be mounted directly to the surface of a printed circuit board (PCB) without drilling holes like traditional through-hole components.
Such resistors are usually much smaller than traditional resistors, so they take up much less space on the circuit board. The use of SMD resistors is due to the invention of surface mount technology (SMT), which not only reduces the size of components, but also greatly reduces the time to manufacture circuits. SMD resistors are mainly used in professionally manufactured PCBs, while through-hole resistors are more commonly used in most homemade circuits because they are more convenient to install and do not require specialized equipment.
There are many ways to express the resistance value of SMD resistors, including direct marking, three-digit digital representation, four-digit digital representation, EIAJ code representation, etc. These methods enable the resistance value of the resistor to be clearly marked on the resistor for easy identification and use. In addition, SMD resistors are also resistant to moisture and high temperatures, and have a small temperature coefficient, which allows them to maintain good performance in various environments. -
2. Characteristics of chip fixed resistors?
Characteristics of chip fixed resistors mainly include small size, light weight, adaptability to reflow soldering and wave soldering, stable electrical performance and high reliability, low assembly cost, compatibility with automatic mounting equipment, high mechanical strength, and superior high-frequency characteristics.
Chip fixed resistors are small and light, which facilitates the layout and installation of circuits and saves space. Adapting to the technical requirements of reflow soldering and wave soldering makes them highly applicable in modern electronic manufacturing processes. The stability and high reliability of electrical performance ensure the long-term stable operation of the circuit and reduce the failure rate. The low assembly cost and compatibility with automatic mounting equipment improve production efficiency and reduce manufacturing costs. -
3. Resistance value representation method
In the digital identification of chip resistors, the first three digits are usually used to indicate the resistance value. These digits are interpreted in decimal, such as "100" means the resistance value is 100 ohms. In some cases, if the resistor value is large, "R" may be used to indicate the decimal point position, such as "1R0" for a resistor value of 1.0 ohm.
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4. Resistors Guide
When interpreting the digital identification of chip resistors, you need to pay attention to the following points:
1. Make sure to correctly identify each digit in the digital identification to avoid misreading and misjudging the resistance value or accuracy.
2. Be familiar with the digital representation methods corresponding to different accuracy levels so that you can quickly and accurately judge the tolerance accuracy of the resistor.
3. In actual applications, you also need to consider the operating temperature range, power and other parameters of the resistor to ensure its stable and reliable performance.
