FH2400051 24 MHz Crystal Equivalent & Substitute Parts

Part Overview

The FH2400051 is a 24 MHz fundamental mode crystal manufactured by Diodes Incorporated in the SaRonix-eCera™ FH series. This surface mount device operates across the industrial temperature range of -40°C to 85°C with ±10ppm frequency tolerance and 12pF load capacitance. The part is Active status and ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified based on matching frequency, operating temperature range, fundamental mode operation, and compliance certifications while accommodating variations in load capacitance, ESR, and package dimensions within acceptable electrical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	FH2400051
Manufacturer	Diodes Incorporated
Frequency	24 MHz
Frequency Tolerance	±10ppm
Frequency Stability	±15ppm
Load Capacitance	12pF
ESR (Equivalent Series Resistance)	40 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FH2400051 are qualified based on the following criteria:

Primary Matching Parameters:

Frequency: 24 MHz (exact match required)
Frequency Tolerance: ±10ppm (exact match required)
Frequency Stability: ±15ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -40°C to 85°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
MSL Rating: 1 (Unlimited) (exact match required)

Allowable Variation Parameters:

Load Capacitance: 9pF, 10pF, or 12pF (circuit design determines compatibility)
ESR: 40 Ohms to 100 Ohms (within acceptable operating margins)
Package Dimensions: Minor variations permitted within SMD assembly tolerances
Height - Seated: Up to 0.028" (0.70mm) maximum

Substitutes are grouped by load capacitance value, as this parameter directly affects circuit resonance and must align with oscillator design specifications. ESR variations are acceptable within the specified range as they do not compromise fundamental frequency stability or temperature performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Frequency Tolerance	Load Capacitance	ESR (Ohms)	Operating Temperature	Package	RoHS Status	MSL Rating	Inventory (Pcs)
FH2400051	Diodes Incorporated	24 MHz	±10ppm	12pF	40	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	932
402F2401XIAR	CTS-Frequency Controls	24 MHz	±10ppm	10pF	100	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	21392
ECS-240-10-37-CWN-TR	ECS Inc.	24 MHz	±10ppm	10pF	80	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	13778
Q 24,0-JXS21-10-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	10pF	80	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	7086
Q 24,0-JXS21-12-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	12pF	80	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	4635
Q 24,0-JXS21-9-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	9pF	80	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	2707
Q 24,0-JXS22-12-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	12pF	50	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	3723
Q 24,0-JXS32-10-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	10pF	40	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	2371
Q 24,0-JXS32-12-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	12pF	40	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	40267
Q 24,0-JXS32-9-10/15-T1-FU-WA-LF	Jauch Quartz	24 MHz	±10ppm	9pF	40	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	9422
TSX-3225 24.0000MF15X-AC3	EPSON	24 MHz	±10ppm	9pF	40	-40°C to 85°C	4-SMD, No Lead	ROHS3 Compliant	1	187569

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance with MSL 1 rating, ensuring regulatory and environmental qualification equivalence to the FH2400051.

For 12pF Load Capacitance Applications (Direct Electrical Match): Q 24,0-JXS21-12-10/15-T1-FU-WA-LF (Jauch Quartz, 80 Ohms ESR) and Q 24,0-JXS22-12-10/15-T1-FU-WA-LF (Jauch Quartz, 50 Ohms ESR) provide 12pF load capacitance matching. Q 24,0-JXS32-12-10/15-T1-FU-WA-LF (Jauch Quartz, 40 Ohms ESR) matches both load capacitance and ESR to the FH2400051.

For 10pF Load Capacitance Applications: 402F2401XIAR (CTS-Frequency Controls, 100 Ohms ESR), ECS-240-10-37-CWN-TR (ECS Inc., 80 Ohms ESR), Q 24,0-JXS21-10-10/15-T1-FU-WA-LF (Jauch Quartz, 80 Ohms ESR), and Q 24,0-JXS32-10-10/15-T1-FU-WA-LF (Jauch Quartz, 40 Ohms ESR) are qualified for circuits designed with 10pF load capacitance specifications.

For 9pF Load Capacitance Applications: Q 24,0-JXS21-9-10/15-T1-FU-WA-LF (Jauch Quartz, 80 Ohms ESR), Q 24,0-JXS32-9-10/15-T1-FU-WA-LF (Jauch Quartz, 40 Ohms ESR), and TSX-3225 24.0000MF15X-AC3 (EPSON, 40 Ohms ESR) are qualified for circuits designed with 9pF load capacitance specifications.

High Availability Option: TSX-3225 24.0000MF15X-AC3 (EPSON) offers the highest inventory level at 187,569 pieces, supporting supply chain continuity for 9pF load capacitance applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 10pF load capacitance crystal for the 12pF FH2400051? A: Load capacitance substitution requires circuit design verification. The oscillator circuit must be designed for the substitute part's load capacitance value. Mismatched load capacitance can result in frequency deviation outside tolerance specifications. Consult your oscillator circuit design documentation before substitution.

Q: What is the significance of ESR variation between 40 Ohms and 100 Ohms? A: ESR affects crystal startup characteristics and power consumption in the oscillator circuit. Lower ESR values (40 Ohms) reduce startup time and power draw. Higher ESR values (100 Ohms) may require circuit design accommodation. All listed ESR values are within acceptable operating margins for 24 MHz fundamental mode crystals.

Q: Are all substitute parts pin-compatible with the FH2400051? A: All substitute parts use 4-SMD, No Lead package configuration with identical pinout. Physical dimensions vary slightly; verify PCB footprint compatibility before assembly. The FH2400051 measures 0.098" L x 0.079" W (2.50mm x 2.00mm), while smaller packages measure 0.079" L x 0.063" W (2.00mm x 1.60mm) and larger packages measure 0.126" L x 0.098" W (3.20mm x 2.50mm).

Q: Do all substitute parts meet the same compliance requirements as the FH2400051? A: All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) rating and Active product status, matching the FH2400051 compliance profile. REACH status is Unaffected for all parts.

Q: Which substitute part provides the closest electrical match to the FH2400051? A: Q 24,0-JXS32-12-10/15-T1-FU-WA-LF (Jauch Quartz) matches the FH2400051 in frequency, tolerance, load capacitance (12pF), and ESR (40 Ohms), providing direct electrical equivalence with 40,267 pieces in inventory.

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