Overall Purpose:

These documents contain technical specifications for a surface mount resistor. They detail the required electrical, mechanical, and environmental performance characteristics. They also reference Japanese Industrial Standards (JIS) for testing and validation. The intention is to ensure the resistor meets a high standard of quality and reliability.

1. General Information / Document Structure:

️· Document Type: These are specifications for a resistor, likely to be used in electronic circuits.
️· Document Format: The document is broken up into multiple pages, each containing tables and descriptions of tests and specifications.
️· Referenced Standards: Heavily relies on JIS standards for testing methods. (JIS is a set of voluntary consensus standards maintained by the Japanese Industrial Standards Committee.)

2. Electrical Specifications & Tests

️· Short Time Overload: The resistor must withstand a short, high-power surge (2.5 times the rated power for 5 seconds) without significant damage.
- Metric: Change in Resistance (∆R) limited to a specified value, plus a percentage related to the nominal resistance. No burning or arcing allowed.
️· Insulation Resistance: Tests the resistance between the resistor's terminals and its protective film, and between the terminals and the substrate. High values are required.
️· Voltage Proof (Dielectric Withstand): Tests the resistor's ability to withstand a high AC voltage without breakdown.
- Metric: Limited change in resistance (∆R), no breakdown (arcing, fire).
️· Thermal Shock: Tests performance after repeated cycles between very low and very high temperatures.
- Metric: Limited change in resistance (∆R).
️· Low Temperature Storage: Tests performance after storage at a low temperature.
- Metric: Limited change in resistance (∆R).
️· High Temperature Exposure: Tests performance after exposure to a high temperature.
- Metric: Limited change in resistance (∆R).
️· Load Life: Tests performance under continuous rated voltage and power conditions over an extended period (1000 hours).
- Metric: Limited change in resistance (∆R).
️· Damp Heat with Load: Tests performance under high humidity and temperature while carrying a load.
- Metric: Limited change in resistance (∆R).
️· Mechanical Shock: Tests the resistance’s ability to endure a mechanical shock.
- Metric: Change in resistance (∆R).
️· Bending Test: Tests the resistor’s capability to withstand bending forces.
- Metric: Change in resistance (∆R).

3. Mechanical/Soldering Specifications

️· Solderability: The resistor’s surface must be easily solderable with good coverage (95% or greater).
️· Resistance to Soldering Heat: Resistor must withstand immersion in molten solder.
- Metric: Limited deformation in appearance, and change in resistance (∆R).

4. Dimensional Information

️· Diagrams: Page 7 contains a diagram with various dimensions labeled with "Col" numbers. This provides physical dimensions of the resistor's footprint and components.
️· Table on Page 6: This table, labeled "Col1" through "Col36," provides a list of numerical values. The meaning of these values isn't explicitly defined but likely represents critical dimensions and spacing.

5. Packaging Information

️· Reel Dimensions: Page 8 includes dimensions and specifications for the reel used to package the resistors, including the number of holes.



Key Takeaways:

️· The resistor is intended for high-reliability electronic applications.
️· Testing is rigorous and covers a wide range of environmental and electrical stressors.
️· Compliance with JIS standards is a critical requirement.
️· Detailed dimensional information is provided for manufacturing and assembly.