I. Document Overview

️· Type: This document appears to be a specification sheet for a surface mount resistor (likely a thick film resistor). It outlines its electrical and mechanical characteristics, test conditions, and acceptance criteria. It's intended for manufacturers, engineers, and quality control personnel.
️· Standards Referenced: The document frequently references JIS (Japanese Industrial Standards) standards (e.g., JIS C 5201-1). This indicates the resistor's performance is assessed according to these specific, recognized guidelines.
️· Page Structure: The document is divided into pages, each addressing different aspects of the resistor's performance.
️· Units: Units are consistently used. "mm" and "Ω" are prominent.

II. Electrical Characteristics & Tests

️· Resistance Range: Mentioned in the summary, but not explicitly detailed in the provided text.
️· Short Time Overload:
- Condition: 2.5 times the rated power for 5 seconds.
- Requirement: Resistance change (ΔR) within a tolerance (0.5% + 0.0005Ω), no breakdown (sparking, arcing, burning).
️· Insulation Resistance:
- Condition: Resistor clamped in a metal block, 100±15VDC for 1 minute.
- Requirements: Specific minimum resistance values between the electrode and the protection film and between the electrode and the substrate (both in MΩ).
️· Voltage Proof:
- Condition: 100VAC (RMS) for 1 minute.
- Requirement: Resistance change (ΔR) within a tolerance (0.5% + 0.0005Ω), no breakdown.
️· Thermal Shock:
- Condition: Cycles between -55°C and 125°C, 15 minutes at each temperature.
- Requirement: Resistance change (ΔR) within a tolerance (1.0% + 0.0005Ω), no appearance damage.
️· Low Temperature Storage:
- Condition: -55°C for 1000 hours
- Requirement: Resistance change (ΔR) within a tolerance (1.0% + 0.0005Ω), no appearance damage.
️· High Temperature Exposure:
- Condition: 125°C for 1000 hours
- Requirement: Resistance change (ΔR) within a tolerance (1.0% + 0.0005Ω), no appearance damage.
️· Solderability:
- Condition: Solder temperature 245±5°C, immersion duration 2±0.5 seconds.
- Requirement: Uniform solder coverage on at least 95% of the resistor's surface.
️· Resistance to Soldering Heat:
- Condition: Dipped into solder at 270±5°C for 10±1 seconds.
- Requirement: Resistance change (ΔR) within a tolerance (0.5% + 0.0005Ω), no visible deformation.
️· Load Life:
- Condition: Rated voltage for 1.5 hours, pause for 0.5 hours, repeated 1000 times.
- Requirement: Resistance change (ΔR) within a tolerance (1.0% + 0.0005Ω), no damage.
️· Damp Heat with Load:
- Condition: 60±2°C and 90-95% relative humidity, rated voltage for 1.5 hours, off for 0.5 hours, repeated 1000 times.
- Requirement: Resistance change (ΔR) within a tolerance (1.0% + 0.0005Ω), no damage.
️· Mechanical Shock:
- Condition: 100 G’s for 6 milliseconds, 5 pulses.
- Requirement: Resistance change (ΔR) within a tolerance (0.5% + 0.0005Ω), no breakage.
️· Bending Test:
- Condition: Specified dimensions for epoxy board.
- Requirement: Resistance change (ΔR) within a tolerance (0.5% + 0.0005Ω), no breakage.

III. Mechanical Dimensions & Layouts (Figures)

️· The document includes figures with labels like "Test board B" which show dimensional layout and placements of elements.
️· These appear to be specific to testing procedures or the resistor’s intended application.

IV. Packaging Details

️· The specification notes a "Pull D" and refers to "Pre-empted holes" suggesting a reel or tape packaging method.

Key Observations & Points

️· Tight Tolerances: The resistor specifications emphasize very tight tolerances on resistance changes (ΔR). This indicates a requirement for high precision.
️· Reliability Testing: The testing regime is extensive and aimed at assessing long-term reliability under various stress conditions (temperature, humidity, mechanical shock).
️· Visual Inspection: "No damage" and "no visible deformation" criteria are often included, indicating the importance of visual quality control.
️· JIS Standards: These standards provide a level of confidence in the measurement equipment and methodology.


️· Rated Power: The specified rated power value.
️· Resistance Range: The range of resistances this specification covers.
️· Full Figures: The complete dimensional figures.