FH4000075Z Equivalent & Substitute Parts

Part Overview

The FH4000075Z is a 40 MHz fundamental mode crystal oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FH series. This surface mount device operates at ±10ppm frequency stability with a 10pF load capacitance and 60 Ohms equivalent series resistance. The component is actively produced, RoHS3 compliant, and available in high volume (3776 pieces in stock). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific parameter optimization.

Key Parameters

Parameter	Value
Frequency	40 MHz
Frequency Stability	±10ppm
Load Capacitance	10pF
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FH4000075Z is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Frequency: 40 MHz (exact match required)
Frequency Stability: ±10ppm (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)
Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Parameters:

Load Capacitance: 7pF, 8pF, or 10pF (circuit design dependent)
ESR: 40 Ohms, 50 Ohms, or 60 Ohms (circuit design dependent)
Physical Dimensions: Variations permitted within PCB layout constraints
RoHS Compliance: ROHS3 or equivalent environmental standard

Substitute parts must satisfy all primary criteria. Secondary parameters may vary based on specific circuit requirements and board layout capabilities.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Frequency Stability	Load Capacitance	ESR (Ohms)	Operating Temperature	Package / Case	Size (mm)	RoHS Status	Inventory (Pcs)
FH4000075Z	Diodes Incorporated	40 MHz	±10ppm	10pF	60	-20°C ~ 70°C	4-SMD, No Lead	2.50 x 2.00	ROHS3	3776
8Q-40.000MEEV-T	FTS	40 MHz	±10ppm	8pF	80	-20°C ~ 70°C	4-SMD, No Lead	1.60 x 1.20	RoHS	4147
ABM10W-40.0000MHZ-7-B1U-T3	Abracon LLC	40 MHz	±10ppm	7pF	40	-20°C ~ 70°C	4-SMD, No Lead	2.50 x 2.00	ROHS3	3109
ABM10W-40.0000MHZ-8-B1U-T3	Abracon LLC	40 MHz	±10ppm	8pF	40	-20°C ~ 70°C	4-SMD, No Lead	2.50 x 2.00	ROHS3	4899
ABM11-40.000MHZ-B1U-T3	Abracon LLC	40 MHz	±10ppm	10pF	60	-20°C ~ 70°C	4-SMD, No Lead	2.00 x 1.60	ROHS3	16251
ABM11W-40.0000MHZ-7-B1U-T3	Abracon LLC	40 MHz	±10ppm	7pF	40	-20°C ~ 70°C	4-SMD, No Lead	2.00 x 1.60	ROHS3	3794
ABM11W-40.0000MHZ-8-B1U-T3	Abracon LLC	40 MHz	±10ppm	8pF	40	-20°C ~ 70°C	4-SMD, No Lead	2.00 x 1.60	ROHS3	2133
ABM12W-40.0000MHZ-7-B1U-T3	Abracon LLC	40 MHz	±10ppm	7pF	50	-20°C ~ 70°C	4-SMD, No Lead	1.60 x 1.20	ROHS3	1086
ABM12W-40.0000MHZ-8-B1U-T3	Abracon LLC	40 MHz	±10ppm	8pF	50	-20°C ~ 70°C	4-SMD, No Lead	1.60 x 1.20	ROHS3	11063
ECS-400-10-37-CKM-TR	ECS Inc.	40 MHz	±10ppm	10pF	50	-20°C ~ 70°C	4-SMD, No Lead	2.00 x 1.60	ROHS3	35571
ECS-400-8-36CKM	ECS Inc.	40 MHz	±10ppm	8pF	40	-20°C ~ 70°C	4-SMD, No Lead	2.50 x 2.00	ROHS3	22675

Engineering Selection Recommendations

All listed substitute parts meet the mandatory electrical and mechanical criteria for direct substitution with the FH4000075Z. Selection among alternatives is determined by circuit load capacitance requirements and available inventory.

Direct Electrical Match (10pF Load Capacitance, 60 Ohms ESR): ABM11-40.000MHZ-B1U-T3 provides identical electrical specifications with the highest inventory availability (16251 pieces). This part is ROHS3 compliant and actively produced.

Alternative Load Capacitance Options: Parts with 7pF or 8pF load capacitance are substitutable when circuit design permits. ESR variations (40 Ohms or 50 Ohms) are acceptable within the operating temperature range of -20°C to 70°C.

Compact Package Alternatives: ABM12W and 8Q series parts offer reduced physical dimensions (1.60mm x 1.20mm) while maintaining all electrical specifications. These are suitable for space-constrained PCB layouts.

High Inventory Availability: ECS-400-10-37-CKM-TR (35571 pieces) and ABM12W-40.0000MHZ-8-B1U-T3 (11063 pieces) provide maximum supply security for high-volume production.

All substitute parts carry ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the environmental and handling requirements of the original FH4000075Z.

Frequently Asked Questions (FAQ)

Q: Can I substitute the FH4000075Z with a part having different load capacitance? A: Yes, if your circuit design accommodates the alternative load capacitance value. The FH4000075Z specifies 10pF; substitutes with 7pF or 8pF load capacitance are electrically valid provided the oscillator circuit is designed for that capacitance. Verify circuit schematic requirements before selection.

Q: What is the impact of ESR differences between substitute parts? A: ESR variations (40 Ohms, 50 Ohms, or 60 Ohms) affect oscillator startup time and power consumption. The FH4000075Z operates at 60 Ohms. Lower ESR values (40 or 50 Ohms) reduce power consumption and improve startup characteristics. Higher ESR values increase power draw. Selection depends on circuit power budget and startup timing requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitutes meet ROHS3 compliance or equivalent environmental standards. The FH4000075Z and all Abracon, ECS, and FTS alternatives are ROHS3 compliant.

Q: Can I use a substitute with different physical dimensions? A: Physical dimensions vary among substitutes. Verify PCB footprint compatibility before selection. Compact packages (1.60mm x 1.20mm) require smaller PCB land patterns than standard packages (2.50mm x 2.00mm). Consult PCB layout guidelines and component datasheets for dimensional verification.

Q: Which substitute offers the best supply availability? A: ECS-400-10-37-CKM-TR provides the highest inventory (35571 pieces) with identical electrical specifications to the FH4000075Z (10pF load capacitance, 50 Ohms ESR). ABM11-40.000MHZ-B1U-T3 offers the second-highest availability (16251 pieces) with exact electrical match (10pF, 60 Ohms ESR).

Q: Are moisture sensitivity levels equivalent across all substitutes? A: The FH4000075Z specifies Moisture Sensitivity Level 1 (Unlimited). All Abracon substitutes specify MSL as Not Applicable, indicating equivalent or superior moisture handling. ECS and FTS parts specify MSL 1 (Unlimited), matching the original specification.

Q: What is the operating temperature range for all substitutes? A: All substitute parts operate within -20°C to 70°C, matching the FH4000075Z specification. This range is consistent across all manufacturers and part numbers listed.

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