A FRC standard (general purpose) SMD thick film resistor produced by BEC is the most common, versatile surface-mount passive component used in electronic circuits for precision current/voltage limiting, signal division, load matching, and biasing-it is the surface-mount counterpart to through-hole carbon film/resistor network resistors, optimized for high-volume, automated PCB assembly (reflow soldering) and compact circuit design. It uses a thick film resistive layer deposition process to form the resistive element.
Basic Parameters
|
Product Category |
FRC standard SMD thick film resistor |
|
Resistance Range |
0Ω, 1Ω~100MΩ |
|
Size Range |
0201~2512 |
|
Working Temperature |
-55℃~155℃ |
|
Tolerance |
±1%, ±5% |
|
Certificate |
RoHS, REACH |
|
Applications |
Home entertainment, consumer electronics, LoT & smart devices, Automotive industry |
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: What makes FRC series a "thick film" resistor, and how is this different from a thin film resistor?
A2: The key difference is the thickness and manufacturing of the resistive layer:
Thick film: A metal oxide/cermet paste (ruthenium oxide + glass frit) is screen-printed onto the ceramic substrate and fired at 850–950°C; laser-trimmed for target resistance. Low-cost, high-scalable process (90% of SMD resistors are thick film).
Thin film: A metal alloy layer (<1 μm thick) is sputtered/evaporated onto the substrate; more precise but expensive.
Q2: Are FRC standard SMD thick film resistors fixed or variable resistors?
A2: They are fixed 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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