RCD Fuse Resistor Questionnaire RESISTORS · CAPACITORS · COILS · DELAY LINES
RCD offers the widest range of fuse resistors in the industry including wire, film, and thermally fused models (current ratings from
10mA to >100A). If one of our standard fuse resistors won’t readily meet your requirement, we’ll offer a custom or modified version.
In order to ensure that we supply the most cost effective model, please complete this questionnaire with as much detail as possible.
NAME: E-mail: DATE:
1. Resistance value: tolerance:
2. Package type: surface mount is preferred , through-hole is preferred , whichever is most economical
(SM fuse resistors are typically more costly). List the preferred size, model, or competitor p/n
3. Please advise quantity level that you'd like quoted (reply required): target price:
4. What is the nominal wattage, voltage, or current that the resistor must dissipate during normal (non-fault)
conditions? If ambient temp is above 25ºC, indicate temp here:
5. What is the wattage, voltage, or current of the fault condition? Examples: “240VAC”, “60A”, “12W”, 12VDC”, or “fault can
be anywhere from 2A to 50A”:
6. Does the resistor have to blow within a specific amount of time? Or just in an amount of time brief enough to prevent
the PCB and adjacent components from charring? If a specific amount of time, what is the minimum blow
time? Max blow time?
7. Is there a “hold-off” voltage requirement (voltage level that the part must be able to hold-off after fusing)?
If yes, what is the hold-off voltage?
8. Will the resistor body be mounted directly on PCB or very close to adjacent components? Indicate distance:
Do you prefer a device with standoffs to position body above PCB?
9. Depending on the overload, RCD can sometimes offer resistors which will safely withstand the fault instead of fusing
(generally requires a larger body size). Would this be of interest? If yes, indicate the largest body size that you can
10. Are there any surges that the resistor must withstand? If yes, a) What is the peak wattage, voltage, or current that
a single resistor must withstand during the surge? b)What is source of the surge? Lightning Capacitor
Discharge Capacitor Charge In-Rush Current ESD If none of these, describe
c)Indicate the duration or waveform of the surge (e.g. “Square wave pulse 100mS duration”, “10uS rise time x 1000uS
decay to 50%”, etc.). Be sure to distinguish between mS (milliSec) and uS (microSec):
d) If a capacitor charge or discharge circuit, list the capacitance value:
e) How many surges must the parts withstand, and what is the repetition rate and stability requirement? Examples:
“Single pulse, 2% max shift”, “20 pulses, 60 sec apart, 5-10% max shift”, “10,000 pulses, 60Hz repetition rate, must
not open”, etc:
f) If the energy (joule) level of the surge is known, please indicate here:
11. Is low inductance design req’d?(often adds considerably to price)? If so, please approximate the max H:
12. Is this a new or existing application? If existing, indicate present Manufacturer: Model:
and description: Are there any problems or deficiencies with the parts that you'd like RCD to improve
If a new application, have you found parts made by any other firm which are working OK or seem promising?
If so, please list Mfr: Model: Desc:
13. If there are any UL, CSA, IEC, FCC, Bellcore or other specifications that must be met in addition to the info provided
above, please indicate the pertinent sections of the spec (and include copy with this survey form):
Disclaimer: Any information, recommendations, and opinions resulting from this inquiry are offered solely for your consideration and verification, and are not, in part
or total, to be construed as constituting a warranty or representation for which RCD Components Inc., or its officers and employees, assume legal responsibility.
RCD Components Inc, 520 E. Industrial Park Dr., Manchester, NH USA 03109
TEL:(603)669-0054 FAX:(603) 669-5455 E-mail: email@example.com www.rcdcomponents.com EF-112 Rev.C