FH4000046Z Equivalent & Substitute Parts

Part Overview

The FH4000046Z is a 40 MHz crystal oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FH series. This surface mount crystal is designed for fundamental mode operation with a 12pF load capacitance and 50 Ohms equivalent series resistance. The component is actively produced and widely used in timing and frequency control applications requiring precise 40 MHz oscillation. Substitute parts are identified when original inventory is unavailable or when design flexibility permits alternative specifications within acceptable electrical and mechanical tolerances.

Substiute Parts

FH4000046Z

Diodes IncorporatedIn Stock: 1076FH4000046Z Datasheet

Current PartRFQ

8Z-40.000MAAV-T

TXC CORPORATIONIn Stock: 8338Z-40.000MAAV-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FH4000046Z is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40 MHz (exact match required)
• Package / Case: 4-SMD, No Lead (mechanical compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)
• Size / Dimension: 0.098" L x 0.079" W (2.50mm x 2.00mm) (PCB footprint compatibility)

Allowable Variation Parameters:

• Frequency Tolerance: ±3ppm (main part) to ±30ppm (substitute)
• Load Capacitance: 12pF (main part) to 8pF (substitute)
• ESR: 50 Ohms (main part) to 60 Ohms (substitute)
• Operating Temperature Range: -5°C ~ 100°C (main part) to -20°C ~ 70°C (substitute)

The substitute part 8Z-40.000MAAV-T meets all mandatory matching parameters and represents a valid alternative when the FH4000046Z is unavailable.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (FH4000046Z): Use the FH4000046Z when the design requires the tighter frequency tolerance of ±3ppm and the extended operating temperature range of -5°C ~ 100°C. This part is ROHS3 compliant and maintains active production status.

Substitute Selection (8Z-40.000MAAV-T): The 8Z-40.000MAAV-T from TXC CORPORATION is a valid substitute when the FH4000046Z is unavailable. Both parts share identical frequency (40 MHz), package type (4-SMD, No Lead), and physical dimensions (2.50mm x 2.00mm). The substitute is RoHS compliant and maintains active production status. The substitute exhibits a lower seated height (0.022" vs 0.028"), which may provide assembly advantages in space-constrained applications.

Compliance Considerations: Both parts are RoHS compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8541.60.0060. Both maintain MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can the 8Z-40.000MAAV-T directly replace the FH4000046Z on the PCB? A: Yes. Both parts share identical package type (4-SMD, No Lead) and physical dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm), ensuring PCB footprint compatibility and direct mechanical substitution.

Q: What are the key electrical differences between these parts? A: The FH4000046Z offers tighter frequency tolerance (±3ppm vs ±30ppm) and lower ESR (50 Ohms vs 60 Ohms). The FH4000046Z also supports a wider operating temperature range (-5°C ~ 100°C vs -20°C ~ 70°C). Load capacitance differs: 12pF for the FH4000046Z and 8pF for the 8Z-40.000MAAV-T.

Q: Does the lower seated height of the 8Z-40.000MAAV-T affect assembly? A: The 8Z-40.000MAAV-T has a maximum seated height of 0.022" compared to 0.028" for the FH4000046Z. This lower profile may provide benefits in applications with height constraints but does not prevent substitution in standard assembly processes.

Q: Are both parts suitable for industrial temperature applications? A: The FH4000046Z supports -5°C ~ 100°C, making it suitable for extended industrial temperature ranges. The 8Z-40.000MAAV-T operates within -20°C ~ 70°C, which covers standard commercial and light industrial ranges but does not extend to the upper temperature limit of the primary part.

Q: What is the impact of different load capacitance values? A: Load capacitance affects crystal oscillation characteristics. The FH4000046Z is specified for 12pF load, while the 8Z-40.000MAAV-T is specified for 8pF load. Circuit design must accommodate the specified load capacitance of the selected crystal to maintain frequency accuracy.