CTS-Frequency Controls 416F520X3AST 52 MHz Crystal Equivalent & Substitute Parts

Part Overview

The CTS-Frequency Controls 416F520X3AST is a 52 MHz fundamental mode crystal oscillator in 4-SMD, No Lead surface mount package. This part is discontinued at DiGi Electronics. Equivalent and substitute parts within the CTS 416 series maintain identical electrical and mechanical specifications, enabling direct replacement in applications requiring 52 MHz frequency reference with ±15ppm tolerance and 60 Ohms equivalent series resistance.

Key Parameters

Parameter	Specification
Frequency	52 MHz
Frequency Tolerance	±15ppm
Frequency Stability	±30ppm
ESR (Equivalent Series Resistance)	60 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-10°C to 60°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)
Load Capacitance	Series
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 416F520X3AST are qualified based on the following critical parameters:

Frequency: 52 MHz (exact match required)
Frequency Tolerance: ±15ppm (exact match required)
ESR: 60 Ohms (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)
Operating Temperature Range: -10°C to 60°C (exact match required)
Operating Mode: Fundamental (exact match required)
Load Capacitance: Series (exact match required)

All substitute parts maintain identical mechanical and electrical compatibility with the original 416F520X3AST specification. Variations in frequency stability (±15ppm, ±20ppm, or ±30ppm) and product status do not affect functional interchangeability for applications designed to the 416F520X3AST specification.

Parameter Comparison

Parameter	416F520X3AST	416F520XXASR	416F520X2ASR	416F520X3ASR
Manufacturer	CTS-Frequency Controls	CTS-Frequency Controls	CTS-Frequency Controls	CTS-Frequency Controls
Frequency	52 MHz	52 MHz	52 MHz	52 MHz
Frequency Tolerance	±15ppm	±15ppm	±15ppm	±15ppm
Frequency Stability	±30ppm	±15ppm	±20ppm	±30ppm
ESR	60 Ohms	60 Ohms	60 Ohms	60 Ohms
Operating Mode	Fundamental	Fundamental	Fundamental	Fundamental
Operating Temperature	-10°C to 60°C	-10°C to 60°C	-10°C to 60°C	-10°C to 60°C
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)	0.063" L x 0.047" W (1.60mm x 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)	0.018" (0.45mm)	0.018" (0.45mm)	0.018" (0.45mm)
Load Capacitance	Series	Series	Series	Series
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

The 416F520X3AST is discontinued at DiGi Electronics. All three substitute parts—416F520XXASR, 416F520X2ASR, and 416F520X3ASR—are active products available in Tape & Reel packaging and maintain full electrical and mechanical compatibility with the original specification.

Selection among substitute parts should be based on:

Product Availability: All three substitutes are currently active and in stock.
Frequency Stability Requirements: The 416F520XXASR offers ±15ppm stability; the 416F520X2ASR offers ±20ppm stability; the 416F520X3ASR offers ±30ppm stability. Applications requiring tighter stability should select 416F520XXASR.
Packaging Format: All substitutes are supplied in Tape & Reel format, suitable for automated assembly processes.
Regulatory Compliance: All parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can 416F520X2ASR or 416F520X3ASR be used as direct replacements for 416F520X3AST?

A: Yes. Both parts maintain identical frequency (52 MHz), frequency tolerance (±15ppm), ESR (60 Ohms), package type (4-SMD, No Lead), physical dimensions, operating temperature range, and load capacitance specifications. The difference in frequency stability does not affect functional interchangeability for applications designed to the 416F520X3AST specification.

Q: What is the difference between 416F520XXASR, 416F520X2ASR, and 416F520X3ASR?

A: The three parts differ only in frequency stability: 416F520XXASR provides ±15ppm, 416F520X2ASR provides ±20ppm, and 416F520X3ASR provides ±30ppm. All other electrical and mechanical parameters are identical. Selection depends on the stability requirements of the application.

Q: Is the packaging change from bulk to Tape & Reel significant?

A: Tape & Reel packaging is standard for automated surface mount assembly. If manual assembly or bulk handling is required, consult with your procurement department regarding packaging options.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts—416F520XXASR, 416F520X2ASR, and 416F520X3ASR—are ROHS3 compliant and REACH unaffected.

Q: Can these crystals be used interchangeably in the same PCB design?

A: Yes. All parts share identical footprints, pad layouts, and electrical characteristics within the specified tolerance bands. No PCB redesign is required.

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