A RT high precision and high stability) SMD thin film resistor produced by Yageo group is built for ultra-stable, low-noise performance in precision electronics, leveraging sputtered NiCr thin film on 96% alumina substrates with laser trimming for tight tolerances and low TCR. It is the go-to for industrial, telecom, automotive infotainment, and server applications requiring long-term accuracy and minimal drift. Below is a detailed breakdown of its core traits, specs, construction, and key uses. It uses a thin film resistive layer deposition process to form the resistive element. BEC represents and sells Yageo's RT series of resistors.
Basic Parameters
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Product Category |
RT high precision and high stability SMD thin film resistor |
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Resistance Range |
0Ω, 1Ω~5MΩ |
|
Size Range |
0100~2512 |
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Working Temperature |
-55℃~155℃ |
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Tolerance |
0.01%, ±0.05%, ±0.1%, ±0.25%, ±0.5%. ±1%, ±5% |
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Certificate |
RoHS, REACH |
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Applications |
Medical equipment, LoT & smart devices, Automotive industry, 5G/6G telecom equipment |
Characteristics
Moisture Sensitivity
MSL (Moisture Sensitivity Level): MSL 1 (unlimited floor life)
No baking required before soldering
Exception: Some high-reliability parts may be MSL 3
Humidity: 85% RH typical rating
Flame Retardancy
Coating material: Typically UL94 V-0 rated
Self-extinguishing: <30 seconds after flame removal
No halogens: Many are halogen-free (RoHS compliant)
Environmental Compliance
RoHS compliant: Lead-free (since ~2006)
REACH SVHC: Free of Substances of Very High Concern
Halogen-free: Many manufacturers offer
Conflict minerals: DRC conflict-free reporting
Production Process
Parts of Our Production Facilities
FAQ
Q1: Is the RT series AEC-Q200 qualified for automotive applications?
A1: Yes-Yageo offers AEC-Q200 qualified RT series variants (marked in the part number with an automotive grade suffix) for automotive electronics. These variants meet the strict automotive reliability standard (AEC-Q200 Rev. C) and are tested for:
Wide temperature range: -55°C → +175°C (enhanced from standard -55°C→+155°C).
Severe vibration/shock: 100g shock (0.5ms), 30g vibration (10–2000Hz).
Thermal cycling: -55°C→+155°C (1000 cycles) with ≤±0.5% resistance shift.
Humidity: 85°C/85% RH (1000h) with ≤±0.5% resistance shift.
AEC-Q200 RT resistors are ideal for automotive infotainment, ADAS sensor interfaces, BMS auxiliary
Q2: Are RT series SMD thin film resistors fixed or variable resistors?
A2: They are fixed precision resistors - their resistance value is set during manufacturing (laser-trimmed) and cannot be adjusted in-circuit. Variable SMD resistors (trimmers/potentiometers) are a separate component type for calibration/ tuning.
Q3: What is TCR, and what are the typical TCR values for chip resistors?
A3: TCR (Temperature Coefficient of Resistance) is the change in resistance per degree Celsius temperature shift (ppm/°C = parts per million per °C), a measure of temp stability. For general purpose SMD thick film resistors:
Typical specs: ±100 ppm/°C (±1% tolerance parts) and ±200 ppm/°C (±5% tolerance parts).
Example: A 1kΩ ±100 ppm/°C resistor changes by 0.1Ω per °C (0.01% resistance shift) - sufficient for standard consumer circuits (no ultra-precise temp stability needed).
Thin film resistors have far lower TCR (±10/25 ppm/°C) for precision applications (medical, aerospace).
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