680K Ohm 684 0805 SMD Resistor 1/8W ±5% Tolerance Mega High Value Precision Chip Resistor for Ultra High Impedance & Low Current Circuits

Description

Specifications  

• 680K Ohm 684 0805 SMD Resistor 1/8W
• Resistance Value: 680K Ohm (684)  
• Package Size: 0805 (2012 Metric)  
• Power Rating: 1/8W (0.125W)  
• Tolerance: ±5%  
• Technology: Thick Film  
• Operating Temperature Range: -55°C to +155°C  
• Maximum Working Voltage: 150V  
• Dimensions (L x W x H): 2.0 mm × 1.25 mm × 0.50 mm  
• RoHS Compliant: Yes  

Features  

• Compact 0805 package delivers excellent isolation at mega-ohm levels  
• ±5% tolerance for reliable accuracy in the 600k+ ohm domain  
• 1/8W power rating optimized for ultra-low-current / near-zero power applications  
• Thick film technology provides picoampere-level leakage & ultra-high insulation resistance  
• Wide operating temperature range (-55°C to +155°C) for rock-solid ultra-precision behavior  
• RoHS compliant and lead-free production  
• Ideal for electrometer-grade, medical, scientific and ultra-sensitive instrumentation 
• The 680K Ohm (684) 0805 SMD Resistor is a mega-high value precision resistor engineered for the most critical ultra-high-impedance and ultra-low-current applications in modern precision electronics. With ±5% tolerance and a conservative 1/8W power rating, it serves as the core element in ultra-high-impedance voltage divider networks for precision analog sensor front-ends, high-accuracy ADC signal conditioning, ultra-low-noise reference voltage generation, picoammeter input protection, electrometer-grade current measurement, and any circuit where input bias currents must be restricted to the picoampere or femtoampere domain. It is also the preferred choice for ultra-low-leakage pull-up/pull-down resistors in high-impedance digital sensor interfaces, nanowatt-class or deep-sleep microcontroller GPIO configurations, specialized open-drain setups in battery-powered scientific instrumentation, and any mixed-signal or digital circuit where leakage must be minimized to extreme levels to preserve signal integrity or extend battery life. Additionally, it performs exceptionally as the high-resistance component in transimpedance amplifiers with pico/femtoampere resolution, feedback networks in ultra-low-power op-amps, leakage current monitoring in high-voltage insulation testers, guard-ring biasing in pico-level measurement systems, and the most sensitive analog signal paths found in scientific, medical, and industrial precision instruments.
• The thick film process achieves world-class insulation resistance in the teraohm range, leakage currents in the picoampere to femtoampere domain, vanishingly low parasitic capacitance and inductance, negligible voltage and temperature coefficients at mega-ohm levels, ultra-low thermal and current noise, and outstanding long-term stability against humidity, voltage stress, temperature cycling, and aging—making the 680K 0805 an indispensable component in high-accuracy scientific instrumentation, medical diagnostic & therapeutic devices, radiation & particle detectors, ultra-low-power environmental monitoring nodes, precision electrometers, femtoampere current sources, and any application where resistance values in the high hundreds of kilo-ohms must remain exceptionally accurate and virtually drift-free over years of operation in demanding environmental conditions.
• The compact 0805 footprint maintains excellent electrical isolation even at 680kΩ while providing reliable thermal behavior for its power class and strong soldering integrity, enabling seamless use in both ultra-dense high-reliability production PCBs and individual laboratory-grade ultra-precision prototypes.
• Fully RoHS compliant and manufactured under the most rigorous high-value resistor process controls with special focus on leakage, drift, noise, and stability at mega-ohm levels, the 680K 0805 is one of the most trusted, highest-performance mega-ohm resistors available—delivering unmatched precision, ultra-low leakage, and rock-solid long-term accuracy for the most critical ultra-high-impedance and ultra-precision analog measurement and control applications.

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FAQ  

1. What is the resistance value?
   Exactly 680K Ohms (680,000 Ohms), marked as 684.  
2. What package is it?
   Standard 0805 SMD (2012 Metric).  
3. Power rating?
   1/8W (0.125W).  
4. Tolerance?
   ±5%.  
5. Maximum voltage?
   150V.  
6. Temperature range?
   -55°C to +155°C.  
7. Soldering method?
   Reflow/hand supported.  
8. RoHS?
   Yes, compliant.  
9. Marking?
   “684”.  
10. Common applications?
    Ultra-high-impedance voltage dividers, pico/femto-level sensor/electrometer circuits, ultra-low-leakage digital pull-up/pull-down, near-zero current applications, highest-precision analog/instrumentation biasing.