MC-406 32.7680K-A0: ROHS

Crystals Overview

The EPSON MC-406 32.7680K-A0: ROHS is a surface-mount tuning fork crystal operating at 32.768 kHz with a frequency tolerance of ±20 ppm. It features a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 35 kOhms. The component utilizes a 4-SOJ package with a 2.29 mm pitch, measuring 9.60 mm in length, 4.06 mm in width, and 3.60 mm in maximum height. It supports fundamental mode operation across a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Tuning fork crystal design optimized for low power consumption
• Surface mount 4-SOJ package for automated assembly
• Fundamental oscillation mode stability

Crystals Applications

• Real-time clock circuits
• Microcontroller system timing
• Portable electronic devices

Crystals Procurement Notes

This specific part number is officially obsolete and no longer manufactured by EPSON. Procurement should focus on verified parametric equivalents or alternative series components that match the required electrical specifications and physical footprint. Verify RoHS compliance status through current datasheets of substitute parts.

Crystals Selection Notes

Designers must account for the discontinuation of this component when planning long-term production. Selection should prioritize substitutes with identical load capacitance and ESR values to ensure circuit compatibility without re-verification of oscillator stages. Check manufacturer PCNs for historical context regarding the obsolescence date.

Crystals Part Context

The MC-406 series represents Epson's standard surface-mount tuning fork crystals. This specific variant belongs to the discontinued lineup, replaced by newer generations offering improved availability. It remains a reference point for legacy designs requiring 32.768 kHz timing in compact form factors.

Crystals Replacement Considerations

Parametric equivalents include RSE-32.768-6-B-TR from Raltron Electronics and SWS1446D48A-32.768K from Suntsu Electronics. These alternatives offer similar electrical characteristics for migration purposes.