830009678 Würth Elektronik WE-XTAL 32.768 kHz Quartz Crystal Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 830009678 is a 32.768 kHz tuning fork quartz crystal designed for real-time clock (RTC) and timing applications in embedded systems. This surface-mount component operates at a fundamental frequency of 32.768 kHz with a frequency tolerance of ±20ppm and a load capacitance of 12.5pF. The part is classified as Active and maintains full RoHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure direct replacement capability in circuit designs.

Key Parameters

Parameter	Specification
Frequency	32.768 kHz
Frequency Tolerance	±20ppm
Load Capacitance	12.5pF
ESR (Equivalent Series Resistance)	70 kOhms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	2-SMD, No Lead
Size / Dimension	0.126" L x 0.059" W (3.20mm x 1.50mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 830009678 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Parameters:

Frequency: 32.768 kHz (exact match required)
Frequency Tolerance: ±20ppm (exact match required)
Load Capacitance: 12.5pF (exact match required)
ESR: 70 kOhms (exact match required)
Operating Mode: Fundamental (exact match required)

Mechanical Parameters:

Package Type: 2-SMD, No Lead (exact match required)
Physical Dimensions: 0.126" L x 1.50mm W (3.20mm x 1.50mm) (exact match required)
Mounting Type: Surface Mount (exact match required)

Environmental Parameters:

Operating Temperature Range: -40°C to 85°C (exact match required)

All substitute parts listed meet these criteria and are therefore electrically and mechanically interchangeable with the main part in circuit applications.

Parameter Comparison

Manufacturer	Part Number	Frequency	Frequency Tolerance	Load Capacitance	ESR	Package	Size (mm)	Height Max (mm)	Operating Temp	RoHS Status	Packaging Type
Würth Elektronik	830009678	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Tape & Reel
FTS	9HT10-32.768KDZF-T	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.85	-40 to 85°C	RoHS	Tape & Reel
Micro Crystal	CM7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.65	-40 to 85°C	ROHS3	Tape & Reel
Seiko Instruments	SC32S-12.5PF20PPM	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.85	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel
YIC	32.768K12.5PI/3215E	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel
Abracon LLC	ABS07-32.768KHZ-T	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel
Micro Crystal AG	CC7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Tape & Reel
Citizen Finedevice Co Ltd	CM315D32768DZFT	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel
Ecliptek	E8WSDC12-32.768K TR	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Tape & Reel
ECS Inc.	ECS-.327-12.5-34B-TR	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel
EPSON	FC-135 32.7680KA-A0	32.768 kHz	±20ppm	12.5pF	70 kOhms	2-SMD, No Lead	3.20 x 1.50	0.90	-40 to 85°C	ROHS3	Cut Tape & Digi-Reel

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 830009678 and are suitable for direct replacement in circuit designs. Selection among these alternatives is based on the following factors:

Compliance and Certification: All substitute parts maintain ROHS3 compliance or equivalent RoHS certification, ensuring regulatory compliance for consumer and industrial applications. The EPSON FC-135 32.7680KA-A0 carries REACH Affected status, which may require additional documentation in certain jurisdictions.

Product Status: All substitute parts are classified as Active, indicating current manufacturing and availability.

Packaging Availability: Parts are available in two packaging formats: Tape & Reel (TR) and Cut Tape with Digi-Reel. Selection depends on assembly line requirements and volume needs. Tape & Reel packaging is suitable for high-volume automated assembly, while Cut Tape & Digi-Reel options provide flexibility for lower-volume or mixed-component applications.

Physical Height Considerations: Substitute parts exhibit minor variations in seated height, ranging from 0.65mm to 0.90mm. The Micro Crystal CM7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC offers the lowest profile at 0.65mm, which may be advantageous in space-constrained designs. The FTS 9HT10-32.768KDZF-T and Seiko Instruments SC32S-12.5PF20PPM provide intermediate height at 0.85mm.

Inventory Availability: Substitute parts demonstrate varying inventory levels. The Seiko Instruments SC32S-12.5PF20PPM and EPSON FC-135 32.7680KA-A0 offer the highest stock levels, providing supply chain reliability for large-scale production.

Frequently Asked Questions (FAQ)

Q: Can I substitute the Würth Elektronik 830009678 with any of the listed parts?

A: Yes. All listed substitute parts meet the identical electrical and mechanical specifications: 32.768 kHz frequency, ±20ppm tolerance, 12.5pF load capacitance, 70 kOhms ESR, 2-SMD No Lead package, and 3.20mm x 1.50mm dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Tape & Reel packaging is continuous and optimized for high-speed automated pick-and-place assembly. Cut Tape & Digi-Reel packaging provides individual tape segments on a reel, suitable for lower-volume production or mixed-component assembly where continuous tape is not required.

Q: Does the variation in seated height affect circuit performance?

A: No. The seated height variation (0.65mm to 0.90mm) does not affect electrical performance. Height differences are relevant only for mechanical clearance in densely populated PCB layouts. Verify clearance requirements in your specific application.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either ROHS3 or equivalent RoHS certification. The EPSON FC-135 32.7680KA-A0 is marked as REACH Affected; consult REACH documentation if your application requires REACH Unaffected status.

Q: What is the significance of the 70 kOhms ESR specification?

A: The 70 kOhms Equivalent Series Resistance is a critical parameter for oscillator circuit design. All substitute parts maintain this specification, ensuring compatibility with existing oscillator designs without requiring circuit recalibration.

Q: Can I use these parts interchangeably in production?

A: Yes. All substitute parts are electrically and mechanically interchangeable. However, verify packaging format compatibility with your assembly equipment. Tape & Reel and Cut Tape & Digi-Reel formats require different feeder configurations on automated assembly lines.

Q: What operating temperature range do these crystals support?

A: All parts operate across the -40°C to 85°C temperature range, suitable for industrial and commercial applications. Frequency tolerance of ±20ppm is maintained throughout this range.

Q: Is the 12.5pF load capacitance critical for circuit operation?

A: Yes. The 12.5pF load capacitance is a fundamental parameter that must match the oscillator circuit design. All substitute parts maintain this specification. Do not substitute with parts having different load capacitance values.

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