0805 SMD Chip Resistor 0R

Description

0805 SMD Chip Resistor (0Ω) – Key Specifications

Model Example: RC0805JR-070RL (Yageo) or equivalent

1. Basic Parameters

• Resistance Value (R): 0Ω (Jumper / Zero-Ohm Resistor)
• Tolerance: Typically ±20% (since it’s a jumper, tolerance is not critical).
• Power Rating (P): 1/8W (0.125W) or 1/10W (0.1W) (depends on manufacturer).
• Maximum Working Voltage: 150V (standard for 0805).
• Temperature Coefficient (TCR): Not applicable (0Ω resistor).

2. Physical Dimensions

• Package Size: 0805 (Imperial) / 2012 (Metric).
  • Length: 2.0mm (0.08″).
  • Width: 1.25mm (0.05″).
  • Height: 0.5mm (typical).
• Termination: Pure Sn (tin) or SnPb (lead-based) plating.

3. Electrical Characteristics

• Current Rating:
  • 1A to 2A (depends on manufacturer, e.g., 1A continuous, 2A surge).
• DC Resistance (DCR):
  • Typically <50mΩ (milliohms) for a good-quality 0Ω resistor.
• Frequency Response:
  • Acts as a short circuit at low frequencies; may have slight inductance (~1nH) at high frequencies.

4. Material & Construction

• Substrate: Ceramic (Al₂O₃).
• Conductive Layer: Thick-film ruthenium oxide (RuO₂) or carbon-based.
• Protection: Glass glaze coating.

5. Operating Conditions

• Temperature Range:
  • -55°C to +155°C (standard commercial grade).
• Soldering Conditions:
  • Reflow soldering peak temp: 260°C max (10 sec).

6. Applications

• PCB trace jumper (replacing wire links).
• Fuse replacement (acts as a sacrificial element in overcurrent conditions).
• Noise isolation between ground/power planes.
• Debugging/test point bridging.

7. Manufacturer Part Numbers

• Yageo: RC0805JR-070RL
• Vishay: CRCW08050000Z0EA
• Samsung: CL21F0000GQ12NE

Why Use a 0Ω Resistor?

• Cheaper and easier to place than a wire jumper in automated PCB assembly.
• Can be removed/replaced for debugging (unlike a direct trace).
• Minimal parasitic effects compared to wire jumpers.