Overview
The IRC RN75B1211F is a MIL-spec precision metal film axial resistor delivering stable, accurate resistance values of 1.21kΩ with ±1% tolerance. Built to military standards for aerospace, industrial, and critical electronics applications, this resistor combines reliability with precision performance. Its compact axial lead design enables easy PCB integration and hand-soldering for both prototype and production work.
Key Features
- Precision Tolerance: ±1% tolerance ensures tight resistance tolerance for signal conditioning, biasing, and feedback networks
- MIL-Spec Rated: Qualified to military standards for long-term stability and performance in harsh environments
- Low Temperature Coefficient: Minimal resistance drift across operating temperature range
- Axial Lead Configuration: Solderable copper leads with tin finish for reliable PCB mounting and rework compatibility
- Color-Coded Marking: EIA standard color bands for quick visual identification of resistance value and tolerance
Technical Specifications
- Resistance Value: 1.21 kΩ
- Tolerance: ±1%
- Termination Style: Axial leads (solder/weldable copper)
- Series: RN75B
- Package Quantity: Single unit (or bulk available)
- Temperature Coefficient: Low (MIL-spec grade)
- Operating Temperature Range: -65°C to +175°C (typical for military RN series)
- Resistor Type: Metal Film
- Standards Compliance: MIL-R-10509 qualified
Typical Applications
- Aerospace and avionics instrumentation circuits
- Military-grade analog signal conditioning and measurement systems
- Precision voltage dividers and biasing networks
- Instrumentation amplifier and op-amp feedback networks
- Industrial control and monitoring equipment requiring high accuracy
- Medical device electronics and diagnostic instruments
Compatibility & Replacements
Compatible With
- Standard PCB layouts for axial resistors (0.3″ to 0.4″ lead spacing)
- EIA/IEC standard resistor footprints
- Manual soldering (iron or wave soldering)
- All analog circuit designs requiring 1.21kΩ ±1% precision resistors
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering for OEM applications
- Direct replacement in circuits originally specifying IRC RN75B 1.21k ±1% resistors
Works With
- Analog circuit design software (SPICE simulation, circuit CAD)
- Standard PCB assembly equipment and hand-soldering techniques
- Passive component test and measurement instruments
- Quality control and incoming inspection procedures per MIL-R-10509
