STUDY FOR THE DERATING CURVE OF SURFACE MOUNT FIXED RESISTORS - DERATING CURVES BASED ON TERMINAL PART TEMPERATURE
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Study for the derating curve of surface mount fixed
resistors
Annex A (informative) - Background of the establishment
of the derating curve based on ambient temperature
Annex B (informative) - The temperature rise of SMD
resistors and the influence of the printed circuit
board
Annex C (informative) - The influence of the number of
resistors mounted on the test board
Annex D (informative) - Influence of the air flow in the
test chamber
Annex E (informative) - Validity of the new derating
curve
Annex F (informative) - The thermal resistance of SMD
resistors
Annex G (informative) - How to measure the surface
hotspot temperature
Annex H (informative) - How the resistor manufacturers
measure the thermal resistance of resistors
Annex I (informative) - Measurement method of the
terminal part temperature of the SMD resistors
Annex J (informative) - The variation of the heat
dissipation fraction caused by the difference
between the resistor and its mounting configuration
Annex K (informative) - Influence of airflow on SMD
resistors
Annex L (informative) - The influence of the spatial
resolution of the thermograph
Annex M (informative) - Future subjects
Bibliography
Pertains to SMD resistors with sizes equal or smaller than the RR6332M, including the typical rectangular and cylindrical SMD resistors mentioned in IEC 60115-8.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 40 |
