The following is a detailed summary of surface mount resistor models and key parameters with 1206 packaging, resistance of 1 Ω (1R), and accuracy of ± 1%, classified and explained in different application scenarios:
1、 Metal film anti surge type (high power/automotive grade)
This type of resistor combines high precision and surge resistance, making it suitable for harsh environments such as industrial and automotive electronics
EGM16FT1R00DES (Billion Energy)
Parameters:
Resistance: 1 Ω± 1%
Rated power: 1W (25 ℃)
Temperature coefficient: ± 50ppm/℃
Surge resistance: 20A/10 μ s (compliant with IEC 6100045)
Certification: AECQ200, RoHS, REACH
Features: Nickel chromium alloy metal film layer, electrode thickening design, heat dissipation efficiency 22% higher than ordinary thick film resistors, temperature rise only 28 ℃ (1W load).
Application: IGBT protection for frequency converters, on-board chargers (OBC), 140W gallium nitride fast charging surge suppression.
EGM16FT1R02DES (Billion Energy)
Parameters:
Resistance: 1.02 Ω± 1%
Power: 1W, temperature coefficient: ± 50ppm/℃
Surge resistance: Optimized electrode structure to withstand 100000 pulse impacts.
Advantages: The thermal conductivity efficiency is 30% higher than that of thick film resistors, and it is suitable for high temperature environments in engine compartments.
2、 Thick film standard type (universal/low-cost)
Suitable for common scenarios such as consumer electronics and power management:
Wangquan 1206 1R ± 1%
Parameters:
Resistance: 1 Ω± 1%
Power: 0.5W (1/2W)
Temperature coefficient: not specified (typical thick film resistance is about ± 100~400ppm/℃)
Features: High cost-effectiveness, simplified PCB design with surface mount technology.
HXTOHM 1206 series
Parameters:
Resistance range: 0 Ω~10M Ω (including 1 Ω)
Accuracy: ± 1%, power: 0.25W (1/4W)
Temperature coefficient: ± 100~400ppm/℃ (depending on resistance)
Features: Anti sulfurization design, suitable for humid environments.
3、 Alloy ultra-low resistance type (dedicated for current detection)
For the demand of milliohm level precision sampling, the resistance is close to 1 Ω but slightly lower:
Thick sound 1206F series (such as 0.056R)
Parameters:
Resistance range: 10m Ω~976m Ω (including nearly 1 Ω models)
Accuracy: ± 1%, power: 1W (70 ℃)
Temperature coefficient: ± 500~1500ppm/℃ (the lower the resistance, the higher the TCR)
Application: Switching power supply current protection, Battery Management System (BMS) balancing circuit.
4、 Parameter comparison and selection suggestions
|Model | Resistance | Power | Temperature Coefficient | Surge Resistance | Applicable Scenarios|
|EGM16FT1R00DES | 1 Ω± 1% | 1W | ± 50ppm/℃ | 20A/10 μ s | Automotive Electronics, Industrial Inverter|
|Wangquan 1206 1R | 1 Ω± 1% | 0.5W | Not specified | No special optimization | Consumer electronics, adapter|
|Thick sound 1206F (e.g. 0.056R) | Near 1 Ω± 1% | 1W | ± 500ppm/℃ ↑ | No special optimization | Current sampling BMS |
Key factors for selection:
Power demand:
Choose a 1W metal film resistor (such as the EGM series) for industrial/automotive scenarios, and a 0.5W thick film resistor for consumer electronics.
Temperature drift and accuracy:
Precision measurement (such as current sampling) requires a low-temperature drift of ± 50ppm/℃, which can be relaxed to ± 200ppm/℃ for general scenarios.
Environmental reliability:
Mandatory requirement for AECQ200 certification in automotive electronics; In humid environments, sulfurization prevention technology is required.
Summary
The mainstream choices for 1206 1 Ω± 1% surface mount resistors include:
High reliability scenario: Yineng EGM series (1W, anti surge, vehicle certification);
Low cost scenario: Wangquan 0.5W thick film resistor;
Precision current sampling: Thick acoustic alloy resistor (such as 1.07 Ω± 1% model).
Note: The actual selection should be based on the working temperature, instantaneous current, and long-term stability requirements. Some models (such as EGM16FT1R07DES) may not have a strict resistance of 1 Ω, but they are often used as alternative options due to their similar performance.
