HC-49/US COMPONENT PACKAGE
HC-49/US Component Package
Article by:Geoffrey Hunter
Date Published: | |
Last Modified: |
Contents
1. Overview
This page contains info on the HC-49/U-S SMD component package that is commonly used to house older SMD crystal. For info on un-named SMD crystal packages (which are more common than the HC-49/U-S due to their smaller size), see the SMD Crystal Packages page.
Name | HC-49/U-S |
Synonyms | HC49/US, HC-49US, HC49-US |
Variants | There a four variants for different height sizes (but same PCB land pattern). |
Similar To | HC-49/S (though-hole version) |
Mounting | SMD |
Pin Count | 2 |
Pitch | 9.5mm |
Solderability | Easy to solder, as the leads extrude beyond the edge of the package. |
Thermal Resistance | n/a (this package is used for low power crystals, not normally relevant) |
Land Area | 57.8mm2 (12.3x4.7mm) |
Height |
|
3D Models | |
Common Uses | Crystals |
2. Comments
Common footprint for larger SMD crystals. Internal circuitry is shielded by metal case. Comes in 4 height variants (A, B, C and D). The power consumption of crystals in these package usually ranges from 1nW to 1mW, with a typical value being 50uW.
3. Photos

Figure 1. A photo of the HC-49/US component package.
4. Images

Figure 2. The dimensions and recommended land pattern for the HC-49/U-S component package.

Figure 3. HC-49/US.
Authors

This work is licensed under a Creative Commons Attribution 4.0 International License .
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