ERJ-2RHD104X Datasheet, PDF (5/5 Pages) Panasonic Semiconductor – Precision Thick Film Chip Resistors

Precision Thick Film Chip Resistors
s Recommended Land Pattern
In the case of flow soldering, the land width must be smaller than the Chip Resistor width to control the solder amount
properly. Generally, the land width should be 0.7 to 0.8 times (W) of the width of chip resistor. In the case of reflow soldering,
solder amount can be adjusted, therefor the land width should be set to 1.0 to 1.3 times chip resistor width (W).
Chip Resistor
a
b
Type
(inches)
ERJ2R
(0402)
ERJ3R, 3EK
(0603)
ERJ6R, 6EN
(0805)
ERJ8EN
(1206)
ERJ14N
(1210)
ERJ12N
(1812)
ERJ12S
(2010)
Dimensions (mm)
a
b
c
0.5 to 0.6 1.4 to 1.6 0.4 to 0.6
0.7 to 0.9 2 to 2.2
0.8 to 1
1 to 1.4 3.2 to 3.8 0.9 to 1.4
2 to 2.4
4.4 to 5 1.2 to 1.8
2 to 2.4
4.4 to 5 1.8 to 2.8
3.3 to 3.7 5.7 to 6.5 2.3 to 3.5
3.6 to 4
6.2 to 7 1.8 to 2.8
s Recommended Soldering Conditions
Recommendations and precautions are described below.
q Recommended soldering conditions for reflow
áReflow soldering shall be two times maximum.
áPlease contact us for additional information when you
use in conditions other than those specified.
áPlease measure a temperature of terminations and study
solderability every kind of solder and board, before actual
use.
Peak
Preheating
Heating
For solder (Example : Sn/Pb)
Temperature
Preheating 140 ¡C to 160 ¡C
Main heating Above 200 ¡C
Peak
235 ± 5 ¡C
Time
60 s to 120 s
30 s to 40 s
max. 10 s
For lead-free solder (Example : Sn/Ag/Cu)
Temperature
Time
Preheating 150 ¡C to 180 ¡C 60 s to 120 s
Main heating Above 230 ¡C 30 s to 40 s
Peak
max. 260 ¡C
max. 10 s
Time
q Recommended soldering conditions for flow
For solder
Temperature
Time
Preheating
140 ¡C to 160 ¡C
60 s to 120 s
Soldering
245±5 ¡C
20 s to 30 s
For lead-free solder
Temperature
Time
150 ¡C to 180 ¡C
60 s to 120 s
max. 260 ¡C
max. 10 s
Cautions for Safety
1. If transient load (heavy load in a short time) like pulse is expected to be applied, carry out evaluation and
confirmation test with the resistors actually mounted on your own board.
When the load of more than rated power is applied under the load condition at steady state, it may
impair performance and/or reliability of resistor.
Never exceed the rated power.
2. Chlorine type or other high-activity flux is not recommended as the residue may affect performance or reliability of
resistors.
3. When soldering with soldering iron, never touch the body of the chip resistor with a tip of the soldering iron. When
using a soldering iron with a tip at high temperature, solder for a time as short as possible (three seconds or less
up to 350 ¡C).
4. Avoid physical shock to the resistor and nipping of the resistor with hard tool (a pair of pliers or tweezers) as it may
damage protective film or the body of resistor and may affect resistorÕs performance.
Design, Specifications are subject to change without notice. Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.