CTS-Frequency Controls 416F25035AKT 25 MHz Crystal Equivalent & Substitute Parts

Part Overview

The CTS-Frequency Controls 416F25035AKT is a 25 MHz fundamental mode crystal oscillator in 4-SMD, No Lead surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 416F25035AKT delivers 25 MHz frequency output with ±30ppm tolerance and 8pF load capacitance in a compact 1.60mm × 1.20mm form factor suitable for space-constrained applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	416F25035AKT
Manufacturer	CTS-Frequency Controls
Frequency	25 MHz
Frequency Tolerance	±30ppm
Frequency Stability	±50ppm
Load Capacitance	8pF
ESR (Equivalent Series Resistance)	120 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 × 0.047" W (1.60mm × 1.20mm)
Height - Seated (Max)	0.018" (0.45mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution of 25 MHz crystals in the 416 series is determined by the following critical parameters:

Frequency Match: All substitute parts must operate at 25 MHz with ±30ppm tolerance to maintain circuit timing specifications.

Load Capacitance Compatibility: The 416F25035AKT specifies 8pF load capacitance. Substitute parts with different load capacitance values (6pF, 10pF) are classified as similar alternatives rather than direct equivalents, as they require circuit tuning adjustments.

Electrical Characteristics: ESR of 120 Ohms and fundamental operating mode are consistent across all listed substitutes.

Package and Mounting: All substitutes maintain the 4-SMD, No Lead surface mount package with identical physical dimensions (1.60mm × 1.20mm), ensuring PCB layout compatibility.

Frequency Stability: The main part specifies ±50ppm stability. The parametric equivalent 416F25033AKR offers improved ±30ppm stability, while 416F25035AKR maintains ±50ppm stability.

Product Status and Availability: Active status substitutes ensure ongoing supply chain access and manufacturing support.

Parameter Comparison

Parameter	416F25035AKT (Main)	416F25035AAR	416F25035ATR	416F25033AKR	416F25035AKR
Frequency	25 MHz	25 MHz	25 MHz	25 MHz	25 MHz
Frequency Tolerance	±30ppm	±30ppm	±30ppm	±30ppm	±30ppm
Frequency Stability	±50ppm	±50ppm	±50ppm	±30ppm	±50ppm
Load Capacitance	8pF	10pF	6pF	8pF	8pF
ESR	120 Ohms	120 Ohms	120 Ohms	120 Ohms	120 Ohms
Operating Mode	Fundamental	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	-10°C to 60°C
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	1.60mm × 1.20mm	1.60mm × 1.20mm	1.60mm × 1.20mm	1.60mm × 1.20mm	1.60mm × 1.20mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Parametric Equivalent: The 416F25035AKR is the primary substitute for the discontinued 416F25035AKT. Both parts share identical load capacitance (8pF), frequency stability (±50ppm), and all electrical characteristics. The 416F25035AKR is currently active with Tape & Reel packaging, ensuring production availability.

Enhanced Stability Alternative: The 416F25033AKR offers improved frequency stability at ±30ppm compared to the main part's ±50ppm specification, while maintaining the same 8pF load capacitance. This part is suitable for applications requiring tighter frequency control.

Load Capacitance Variants: The 416F25035AAR (10pF) and 416F25035ATR (6pF) are functionally similar but require circuit tuning adjustments due to different load capacitance values. These parts are appropriate only when the application circuit can accommodate alternative load capacitance specifications.

Compliance and Supply: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 416F25035AKT with 416F25035AKR?

A: Yes. Both parts share identical electrical specifications including 25 MHz frequency, ±30ppm tolerance, 8pF load capacitance, and 120 Ohms ESR. The 416F25035AKR is the active production equivalent.

Q: What is the difference between 416F25035AKR and 416F25033AKR?

A: The primary difference is frequency stability. The 416F25035AKR specifies ±50ppm stability, while the 416F25033AKR specifies ±30ppm stability. Both maintain 8pF load capacitance and are otherwise electrically identical. Select 416F25033AKR for applications requiring tighter frequency tolerance.

Q: Can I use 416F25035AAR or 416F25035ATR as substitutes?

A: These parts are similar alternatives but not direct equivalents. The 416F25035AAR has 10pF load capacitance and the 416F25035ATR has 6pF load capacitance, compared to the main part's 8pF specification. Substitution requires circuit tuning adjustments to the oscillator load network.

Q: Are all substitute parts available in the same packaging as the original?

A: The original 416F25035AKT is supplied in bulk packaging. All substitute parts are available in Tape & Reel (TR) packaging, which is standard for production environments and offers improved handling and automated assembly compatibility.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory and environmental specifications.

Q: What is the physical footprint compatibility?

A: All substitute parts maintain the identical 4-SMD, No Lead package with 1.60mm × 1.20mm dimensions and 0.45mm maximum seated height. PCB layout and land pattern compatibility is assured across all substitutes.

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