9C12076001 12 MHz Crystal 18pF SMD Equivalent & Substitute Parts

Part Overview

The 9C12076001 is a 12 MHz surface mount crystal manufactured by TXC CORPORATION, specified for HC-49/US package with 18pF load capacitance and 40 Ohms equivalent series resistance. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The crystal operates across the industrial temperature range of -40°C to 85°C and complies with ROHS3 and REACH regulations.

Substiute Parts

9C12076001

TXC CORPORATIONIn Stock: 11259C12076001 Datasheet

Current PartRFQ

ABLS2-12.000MHZ-D4Y-T

Abracon LLCIn Stock: 2429ABLS2-12.000MHZ-D4Y-T Datasheet

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ABLS3-12.000MHZ-D4Y-T

Abracon LLCIn Stock: 4030ABLS3-12.000MHZ-D4Y-T Datasheet

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ECS-120-18-5PLX-GN-TR

ECS Inc.In Stock: 2644ECS-120-18-5PLX-GN-TR Datasheet

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ECS-120-18-5PVX-GN-TR

ECS Inc.In Stock: 1557ECS-120-18-5PVX-GN-TR Datasheet

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J49SMH-F-G-G-K-12M0

Jauch QuartzIn Stock: 12411J49SMH-F-G-G-K-12M0 Datasheet

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J49SML-F-G-G-K-12M0

Jauch QuartzIn Stock: 23793J49SML-F-G-G-K-12M0 Datasheet

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LP120F33IDT

CTS-Frequency ControlsIn Stock: 1117LP120F33IDT Datasheet

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LP120F33IET

CTS-Frequency ControlsIn Stock: 1086LP120F33IET Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9C12076001 is determined by strict alignment of the following critical parameters:

Primary Matching Criteria:

• Frequency: 12 MHz (exact match required)
• Frequency Stability: ±30ppm (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 18pF (primary specification; 20pF variants listed for reference only)
• ESR: 40 Ohms (nominal; variants with 35 Ohms, 50 Ohms, and 60 Ohms are acceptable within circuit design tolerances)
• Compliance: ROHS3 and REACH status

Substitute parts are grouped into two categories based on load capacitance alignment:

Group A - 18pF Load Capacitance (Direct Substitutes): ABLS2-12.000MHZ-D4Y-T, ABLS3-12.000MHZ-D4Y-T, ECS-120-18-5PLX-GN-TR, ECS-120-18-5PVX-GN-TR, J49SMH-F-G-G-K-12M0, J49SML-F-G-G-K-12M0, LP120F33IDT

Group B - 20pF Load Capacitance (Application-Dependent): LP120F33IET

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

1. J49SML-F-G-G-K-12M0 (Jauch Quartz) - Highest inventory availability (23,722 pcs). Active product status ensures long-term supply continuity. ESR of 35 Ohms is lower than the original 40 Ohms, providing improved performance margin. ROHS3 and REACH compliant. Identical 18pF load capacitance and HC-49/US package.

2. J49SMH-F-G-G-K-12M0 (Jauch Quartz) - Active product with substantial inventory (12,320 pcs). ESR of 35 Ohms. Identical electrical and mechanical specifications to J49SML variant with different height profile (4.00mm vs 3.00mm seated height).

3. LP120F33IDT (CTS-Frequency Controls) - Exact ESR match (40 Ohms) to original part. Active product status. Identical 18pF load capacitance. Compact dimensions (11.10mm x 4.83mm) with 3.20mm seated height.

Secondary Substitutes (ESR Variation Acceptable):

4. ABLS3-12.000MHZ-D4Y-T (Abracon LLC) - Highest inventory among Abracon variants (4,000 pcs). Active product. ESR of 50 Ohms represents 25% increase from original specification. Compact seated height of 2.50mm. REACH unaffected status.

5. ABLS2-12.000MHZ-D4Y-T (Abracon LLC) - Active product with 2,400 pcs inventory. ESR of 50 Ohms. Seated height of 3.30mm.

6. ECS-120-18-5PLX-GN-TR (ECS Inc.) - Active product with 2,583 pcs inventory. ESR of 50 Ohms. Identical dimensions to original part (11.40mm x 4.80mm). MSL rating of 1 (Unlimited) matches original specification.

Application-Specific Consideration:

7. LP120F33IET (CTS-Frequency Controls) - Load capacitance of 20pF differs from original 18pF specification. Selection requires circuit design verification to confirm compatibility with oscillator load capacitance requirements. Active product status with 991 pcs inventory.

Compliance Status: All substitute parts maintain ROHS3 compliance. REACH status varies: REACH Affected (ABLS2, ECS-120-18-5PLX-GN-TR, LP120F33IDT, LP120F33IET), REACH Unaffected (ABLS3, ECS-120-18-5PVX-GN-TR, J49SMH, J49SML). Selection based on supply chain and regulatory requirements.

Frequently Asked Questions (FAQ)

Q1: Can I substitute the 9C12076001 with any of the listed parts without circuit modification?

A: Parts with identical 18pF load capacitance and ±30ppm frequency stability (ABLS2-12.000MHZ-D4Y-T, ABLS3-12.000MHZ-D4Y-T, ECS-120-18-5PLX-GN-TR, ECS-120-18-5PVX-GN-TR, J49SMH-F-G-G-K-12M0, J49SML-F-G-G-K-12M0, LP120F33IDT) are direct substitutes. ESR variations (35 Ohms to 60 Ohms) are within acceptable operating margins for standard oscillator circuits. LP120F33IET with 20pF load capacitance requires circuit design verification.

Q2: What is the significance of ESR differences between the original part and substitutes?

A: ESR (Equivalent Series Resistance) affects crystal startup characteristics and power consumption. The original 9C12076001 specifies 40 Ohms. Substitutes with lower ESR (35 Ohms: J49SMH, J49SML) provide faster startup and lower power dissipation. Substitutes with higher ESR (50 Ohms: ABLS2, ABLS3, ECS-120-18-5PLX-GN-TR; 60 Ohms: ECS-120-18-5PVX-GN-TR) are acceptable for standard applications but may require oscillator circuit tuning verification.

Q3: Are there physical dimension constraints I should consider?

A: All substitute parts use HC-49/US package with identical length (11.40mm) and width (4.80mm or 4.70mm). Seated height varies: original 4.10mm, substitutes range from 2.50mm to 4.00mm. Lower profile variants (ABLS3 at 2.50mm, ECS-120-18-5PVX-GN-TR at 2.60mm) may provide PCB layout advantages. Verify clearance requirements for your specific application.

Q4: What is the difference between J49SMH-F-G-G-K-12M0 and J49SML-F-G-G-K-12M0?

A: Both are Jauch Quartz 12 MHz crystals with identical electrical specifications (18pF load capacitance, 35 Ohms ESR, ±30ppm stability). The primary difference is seated height: J49SMH is 4.00mm, J49SML is 3.00mm. J49SML offers more compact profile with higher inventory availability (23,722 pcs vs 12,320 pcs).

Q5: Why is LP120F33IET listed if it has 20pF load capacitance instead of 18pF?

A: LP120F33IET is included for reference as a CTS-Frequency Controls alternative with matching ESR (40 Ohms) and identical physical dimensions to LP120F33IDT. The 20pF load capacitance specification requires verification against your oscillator circuit design. Use only if circuit load capacitance tolerance accommodates this variation.

Q6: Which substitute offers the best long-term supply availability?

A: J49SML-F-G-G-K-12M0 (Jauch Quartz) provides the highest inventory level at 23,722 pcs with active product status, ensuring sustained availability. ABLS3-12.000MHZ-D4Y-T (Abracon LLC) with 4,000 pcs inventory and active status is the second option.

Q7: Are all substitutes RoHS3 and REACH compliant?

A: All substitute parts are ROHS3 compliant. REACH status differs: ABLS3-12.000MHZ-D4Y-T and ECS-120-18-5PVX-GN-TR are REACH Unaffected; remaining substitutes are REACH Affected. Verify compliance requirements for your specific regulatory jurisdiction before selection.

Q8: Can I use ECS-120-18-5PVX-GN-TR with 60 Ohms ESR as a direct replacement?

A: ECS-120-18-5PVX-GN-TR is electrically compatible with identical frequency, stability, and load capacitance. The 60 Ohms ESR represents a 50% increase from the original 40 Ohms specification. This variant is acceptable for standard oscillator applications but may exhibit slower startup transients. Oscillator circuit verification is recommended for timing-critical applications.