CTS-Frequency Controls 416F520X2CST 52 MHz Crystal Equivalent & Substitute Parts

Part Overview

The CTS-Frequency Controls 416F520X2CST is a 52 MHz fundamental mode crystal oscillator in a 4-SMD, no-lead surface mount package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part delivers 52.0000 MHz frequency with ±15 ppm tolerance and 60 ohms equivalent series resistance, suitable for precision timing applications requiring stable frequency generation across industrial temperature ranges.

Key Parameters

Parameter	Value
Frequency	52 MHz
Frequency Tolerance	±15 ppm
Frequency Stability	±20 ppm
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-20°C to 70°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60 mm x 1.20 mm)
Height - Seated (Max)	0.018" (0.45 mm)
Load Capacitance	Series
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 416F520X2CST are determined by strict equivalence across all critical electrical and mechanical parameters. The substitution criteria are:

Frequency: 52 MHz (exact match required)
Frequency Tolerance: ±15 ppm (exact match required)
ESR: 60 Ohms (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -20°C to 70°C (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Physical Dimensions: 0.063" L x 0.047" W, 0.018" max height (exact match required)
Load Capacitance: Series (exact match required)
RoHS and REACH Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The identified substitute parts maintain identical electrical performance and physical form factor, differing only in packaging configuration (Tape & Reel vs. bulk) and product status (Active vs. Discontinued).

Parameter Comparison

Parameter	416F520X2CST (Main)	416F520X2CSR (Substitute)	416F520XXCSR (Substitute)
Manufacturer	CTS-Frequency Controls	CTS-Frequency Controls	CTS-Frequency Controls
Frequency	52 MHz	52 MHz	52 MHz
Frequency Tolerance	±15 ppm	±15 ppm	±15 ppm
Frequency Stability	±20 ppm	±20 ppm	±15 ppm
ESR	60 Ohms	60 Ohms	60 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental
Operating Temperature	-20°C to 70°C	-20°C to 70°C	-20°C to 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60 mm x 1.20 mm)	0.063" L x 0.047" W (1.60 mm x 1.20 mm)	0.063" L x 0.047" W (1.60 mm x 1.20 mm)
Height - Seated (Max)	0.018" (0.45 mm)	0.018" (0.45 mm)	0.018" (0.45 mm)
Load Capacitance	Series	Series	Series
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Discontinued at DiGi Electronics	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both 416F520X2CSR and 416F520XXCSR are direct electrical and mechanical equivalents to the discontinued 416F520X2CST. Selection between these active alternatives depends on procurement and inventory requirements:

416F520X2CSR maintains identical frequency stability specification (±20 ppm) to the original part and is available in Tape & Reel packaging with 766 units in stock.

416F520XXCSR offers improved frequency stability (±15 ppm) compared to the original specification and is available in Tape & Reel packaging with 794 units in stock.

Both substitute parts satisfy ROHS3 compliance and REACH requirements. The choice between them should be based on supply chain availability, packaging format requirements for automated assembly, and whether the enhanced frequency stability of 416F520XXCSR provides value for the specific application.

Frequently Asked Questions (FAQ)

Q: Can 416F520X2CSR and 416F520XXCSR be used interchangeably with 416F520X2CST?

A: Yes. Both substitute parts are electrically and mechanically equivalent. They maintain the same 52 MHz frequency, ±15 ppm tolerance, 60 ohms ESR, operating temperature range, and 4-SMD no-lead package dimensions. The primary differences are product status (active vs. discontinued) and packaging format (Tape & Reel vs. bulk).

Q: What is the difference between 416F520X2CSR and 416F520XXCSR?

A: The primary difference is frequency stability. 416F520X2CSR specifies ±20 ppm stability, matching the original part. 416F520XXCSR specifies ±15 ppm stability, which is tighter. Both maintain ±15 ppm frequency tolerance. All other electrical and mechanical parameters are identical.

Q: Are these parts available in different packaging formats?

A: The original 416F520X2CST was supplied in bulk packaging. Both substitute parts (416F520X2CSR and 416F520XXCSR) are supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly.

Q: Do these crystals meet RoHS and REACH compliance requirements?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What is the moisture sensitivity level for these crystals?

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices are sufficient.

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