Equivalent & Substitute Parts for A-1.8432-13 Crystal Oscillator

Part Overview

The Raltron Electronics A-1.8432-13 is a 1.8432 MHz through-hole crystal oscillator in HC-49/U package configuration. This fundamental mode crystal operates across the -20°C to 70°C temperature range with ±30ppm frequency tolerance and 13pF load capacitance. The part is Active status and ROHS3 compliant, making it suitable for legacy and modern electronic applications requiring precise timing references. Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility within the HC-49/U form factor.

Substiute Parts

A-1.8432-13

Raltron ElectronicsIn Stock: 1159A-1.8432-13 Datasheet

Current PartRFQ

LFXTAL015442BULK

IQD Frequency ProductsIn Stock: 1467LFXTAL015442BULK Datasheet

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MP018S

CTS-Frequency ControlsIn Stock: 2323MP018S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A-1.8432-13 are qualified based on the following critical parameters:

Electrical Compatibility:

• Frequency: 1.8432 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 13pF (exact match required)
• Operating Mode: Fundamental (exact match required)

Mechanical Compatibility:

• Package / Case: HC-49/U (exact match required)
• Mounting Type: Through Hole (exact match required)

Environmental & Compliance:

• Operating Temperature Range: -20°C to 70°C (exact match required)
• RoHS Status: ROHS3 Compliant (minimum requirement)

Variable Parameters (Non-Critical for Substitution):

• ESR (Equivalent Series Resistance): 600–800 Ohms (acceptable range)
• Physical dimensions within HC-49/U envelope (minor variations permitted)

All substitute parts meet these criteria and are functionally interchangeable with the main part in applications requiring 1.8432 MHz timing references.

Parameter Comparison

Engineering Selection Recommendations

All three parts—A-1.8432-13, LFXTAL015442BULK, and MP018S—are Active status products with ROHS3 compliance and identical electrical specifications for frequency, tolerance, load capacitance, and operating temperature range. Selection between these parts is based on the following factors:

ESR Considerations: The MP018S (CTS-Frequency Controls) offers the lowest ESR at 600 Ohms, which reduces power consumption in oscillator circuits. The A-1.8432-13 (Raltron Electronics) provides 700 Ohms ESR as a mid-range option. The LFXTAL015442BULK (IQD Frequency Products) operates at 800 Ohms ESR, which is acceptable for applications with higher impedance tolerance.

Regulatory Compliance: The A-1.8432-13 and MP018S are REACH Unaffected, while LFXTAL015442BULK is REACH Affected. For applications subject to REACH regulations, the A-1.8432-13 or MP018S are preferred.

Moisture Sensitivity: The A-1.8432-13 and MP018S both carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints. The LFXTAL015442BULK lists MSL as Not Applicable.

Availability: MP018S (2303 pcs), LFXTAL015442BULK (1441 pcs), and A-1.8432-13 (1110 pcs) are all in stock as new original components.

Frequently Asked Questions (FAQ)

Q: Can I substitute the A-1.8432-13 with LFXTAL015442BULK or MP018S?

A: Yes. Both LFXTAL015442BULK and MP018S are direct electrical and mechanical equivalents. All three parts share identical frequency (1.8432 MHz), frequency tolerance (±30ppm), load capacitance (13pF), operating temperature range (-20°C to 70°C), and HC-49/U package configuration. The parts are functionally interchangeable in applications requiring these specifications.

Q: What is the difference in ESR between these parts?

A: ESR values differ slightly: MP018S operates at 600 Ohms, A-1.8432-13 at 700 Ohms, and LFXTAL015442BULK at 800 Ohms. These variations fall within acceptable operating ranges for HC-49/U crystals and do not affect functional compatibility. Lower ESR (MP018S) results in reduced power dissipation in oscillator circuits.

Q: Are all three parts ROHS3 compliant?

A: Yes. The A-1.8432-13, LFXTAL015442BULK, and MP018S are all ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.

Q: What is the significance of REACH status differences?

A: The A-1.8432-13 and MP018S are REACH Unaffected, meaning they do not contain substances of very high concern (SVHC) listed under REACH regulations. The LFXTAL015442BULK is REACH Affected. For applications in REACH-regulated markets, the A-1.8432-13 or MP018S are the appropriate selections.

Q: Do these parts have moisture sensitivity concerns?

A: The A-1.8432-13 and MP018S carry MSL 1 (Unlimited), indicating no moisture sensitivity limitations during storage or handling. The LFXTAL015442BULK lists MSL as Not Applicable. All three parts are suitable for standard warehouse and assembly environments without special moisture control requirements.

Q: Are the physical dimensions identical across all three parts?

A: All three parts conform to the HC-49/U package standard with minor dimensional variations. The A-1.8432-13 and LFXTAL015442BULK measure 0.435" L × 0.183" W (11.05mm × 4.65mm), while the MP018S measures 0.427" L × 0.150" W (10.85mm × 3.80mm). These variations remain within HC-49/U envelope specifications and do not affect PCB footprint compatibility or mechanical mounting.

Q: Which part should I select for new designs?

A: All three parts are Active status and suitable for new designs. Selection depends on specific requirements: choose MP018S for lowest ESR and power efficiency, A-1.8432-13 for REACH Unaffected status with mid-range ESR, or LFXTAL015442BULK for IQD Frequency Products sourcing preference. All meet identical electrical and environmental specifications.