ERQ14AJ101P Datasheet, PDF (7/8 Pages) Panasonic Semiconductor – Metal Film Fusing Resistors, ERQA, Z

Metal Film
Fusing Resistors, ERQA, Z
Safety Precautions
The following are precautions for individual products. Please also refer to the precautions common to Fixed Resistors
shown on page ER3 of this catalog.
1. Checking the fusing conditions
1) Fusing characteristics differ depending on the type, shape, and resistance. Check the fusing conditions before
selecting the type of Metal Film Fusing Resistors (hereafter called the fusing resistor) to be used.
2) Use the fusing resistors under the maximum open circuit voltage. Otherwise, arcing may occur when a voltage
much higher than the rated one is applied in the event of an abnormality in the circuit, or when a high voltage
is applied after fusing.
3) Under abnormal conditions of a constant voltage circuit, a current of about 2 or 3 times the initial abnormal
current passes through, accelerating the speed at which the fusing resistors blows. When using a constant
current circuit, carefully check the conditions because the fusing resistors may not blow in a constant current
circuit.
2. Checking for pulse voltage, impact voltage, and transient voltage
Make sure to evaluate and check the fusing resistors mounted on your product if they are to be mounted on a
circuit that generates an impact voltage, or if there is a possibility that the transient phenomenon (significantly
high voltage applied in a short time) may occur or that a pulse voltage with a high peak voltage may be applied.
Make sure to consult our sales staff before using the fusing resistors under special conditions.
3. Conditions of use in a steady state
Make sure that the load conditions have a sufficient allowance for the power derating curve. The characteristics of
the fusing resistors are set by using a constant voltage circuit.
4. The solvent resistance of the fusing resistors is not assured. If you use a solvent for cleaning after soldering or
other processes, make sure to consult our sales staff before use and perform a prior test and evaluation to
ensure that the solvent will not affect the reliability of the fusing resistors.
(Data for Reference)
■ Pulse Characteristics (Usual)
t
T
PP : Pulse limit power (W)
VP : Pulse limit voltage (V)
t : Pulse continuous time (s)
T : Period (s)
VR : Rated voltage (V)
P : Rated power (W)
R : Resistance value (ȑ)
Vp max. : Max. pulse limit voltage (V)
Withstand pulse limit power is calculated by the next
method.
PP = K · P · T/t
VP = ǰ K · P · R · T/t
Reference to the right about a fixed number of VPmax.
Type
ERQ14A
ERQ12A
ERQ1AB
ERQ2AB
K
Vp max. (V)
0.6
200
0.6
250
0.6
250
0.4
250
● T>1(s) ৎ T=1(s)
● T/t>100 ৎ T/t=100
● PP<P ৎ P stands for PP
(VP<VR ৎ VR stands for VP)
● Added voltage<Vp max.
● PP or VP is reference value
Conditions : Pulse added time=1000 h, Resistance change=±5 %
Room temperature
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Feb. 2006