3D Models
Note! To download footprints and symbols, use the build and request forms below
Request (48 hours)
- Datasheet Download Datasheet
- Stock & Prices $ Price & Stock for S4040R
- Part Number S4040R
- Manufacturer LITTELFUSE
- Last Modified Date Oct 6, 2025 1:29 PM UTC
- Pinout / Pin List Click Here (Member Only)
S4040R Details
-
Manufacturer Part Number:
S4040R
-
Pbfree Code:
No
-
Rohs Code:
Yes
-
Part Life Cycle Code:
Obsolete
-
Part Package Code:
TO-220AB
-
Package Description:
ROHS COMPLIANT, PLASTIC PACKAGE-3
-
Pin Count:
3
-
ECCN Code:
EAR99
-
HTS Code:
8541.30.00.80
-
Manufacturer:
Littelfuse Inc
-
YTEOL:
0
S4040R Frequently Asked Questions (FAQs)
-
Littelfuse recommends a thermal pad on the bottom of the device, connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2 oz copper thickness is recommended, and the thermal pad should be connected to a ground plane or a dedicated heat sink.
-
Littelfuse recommends using a soldering iron with a temperature of 250°C to 260°C, and a solder with a melting point of 217°C to 220°C. The device should be soldered within 3 seconds to 5 seconds, and the solder joints should be inspected for proper wetting and filleting.
-
The S4040R has a maximum surge current rating of 40 kA, which is specified in the datasheet. However, it's essential to note that the device's surge current rating is dependent on the PCB layout, trace width, and other system-level factors.
-
The S4040R is rated for operation up to 150°C, but its performance may degrade at higher temperatures. Littelfuse recommends derating the device's current rating by 1.5% per degree Celsius above 125°C to ensure reliable operation.
-
Littelfuse recommends using a fuse holder or clip that is specifically designed for the S4040R's package type and size. The fuse holder or clip should provide secure retention, low contact resistance, and adequate clearance for the device's thermal pad.
Trust Checks
Trust Score Unavailable
S4040R Overview
Use the download button to access the S4040R 3D model. You can still request or build the schematic symbol and PCB footprint by using the respective build or request forms on this page.
To find more CAD model downloads similar to this part, try a partial part number search, like S4040,
or try a keyword search, such as Silicon Controlled Rectifiers
