Classification Reflow Profile for SMT components:
Time
Temperature
T
p
t
p
t
L
t
S
T
s max
T
s min
T
C
–5°C
T
L
25
Time 25°C to Peak
Preheat Area
Max. Ramp Up Rate
Max. Ramp Down Rate
Profile Feature Value
Preheat Temperature Min
1)
T
s min
150 °C
Preheat Temperature Max T
s max
200 °C
Preheat Time t
s
from T
s min
to T
s max
t
s
60 - 120 seconds
Ramp-up Rate (T
L
to T
P
) 3 °C/ second max.
Liquidous Temperature T
L
217 °C
Time t
L
maintained above T
L
t
L
60 - 150 seconds
Peak package body temperature T
p
see table
Time within 5°C of actual peak temperaure t
p
20 - 30 seconds
Ramp-down Rate (T
L
to T
P
) 6 °C/ second max.
Time 25°C to peak temperature 8 minutes max.
Classification Reflow Soldering Profile:
1)
refer to IPC/JEDEC J-STD-020D
refer to IPC/ JEDEC J-STD-020E
Properties
Volume mm³
<350
Volume mm³
350-2000
Volume mm³
>2000
PB-Free Assembly | Package Thickness < 1.6 mm
1)
260 °C 260 °C 260 °C
PB-Free Assembly | Package Thickness 1.6 mm - 2.5 mm 260 °C 250 °C 245 °C
PB-Free Assembly | Package Thickness ≥ 2.5 mm 250 °C 245 °C 245 °C
Package Classification Reflow Temperature:
1)
refer to IPC/JEDEC J-STD-020D
refer to IPC/ JEDEC J-STD-020E
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
CREATED CHECKED GENERAL TOLERANCE PROJECTION
METHOD
DaMa SKl DIN ISO 2768-1m
DESCRIPTION
WA-SMSR SMD Steel Spacer
Reverse with internal Thread M3
ORDER CODE
977 506 636 0
REVISION STATUS DATE BUSINESS UNIT PAGE
001.000 Valid 2016-09-22 eiCan 3/5
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
