A-27.145-30-3OT-CL

Crystals Overview

The A-27.145-30-3OT-CL is a parallel resonance quartz crystal manufactured by Raltron Electronics, designed for through-hole mounting in the HC-49/U package. It operates at a nominal frequency of 27.145 MHz with a load capacitance of 30 pF and an equivalent series resistance (ESR) of 50 ohms. The component offers a frequency tolerance of ±50 ppm and stability of ±100 ppm across an operating temperature range of -20°C to +70°C. It is RoHS3 compliant and features UL listing certifications.

Crystals Feature Summary

• Parallel resonance quartz crystal construction
• Through-hole mounting capability in standard HC-49/U housing
• Certified compliance with RoHS3 standards

Crystals Applications

• General purpose clock generation circuits
• Microcontroller oscillator interfaces
• Communication module timing references

Crystals Procurement Notes

Verify that the specific order matches the exact part number A-27.145-30-3OT-CL to ensure correct frequency and package specifications. Confirm RoHS3 compliance requirements if applicable to your manufacturing process. Check for any specific UL listing requirements relevant to your end-product safety approvals before finalizing procurement.

Crystals Selection Notes

Select this component when a 27.145 MHz reference is required in a through-hole design. Ensure the circuit load capacitance matches the specified 30 pF for accurate frequency operation. Consider the 50 ohm ESR value for oscillator drive level calculations. Verify that the operating temperature range of -20°C to +70°C meets environmental constraints.

Crystals Part Context

This crystal belongs to Raltron's general-purpose quartz crystal lineup, utilizing the widely adopted HC-49/U form factor. It serves as a fundamental timing element in electronic systems requiring stable frequency references. The part is distinct from surface-mount variants and higher-frequency overtone crystals within the manufacturer's catalog.

Crystals Replacement Considerations

Cross-reference with other manufacturers offering HC-49/U packaged crystals at 27.145 MHz with 30 pF load capacitance. Ensure substitute parts match the 50 ohm ESR and ±50 ppm tolerance specifications. Verify that alternative components support the same through-hole mounting style and temperature range.