CS20-5.000MABJ-UT Equivalent & Substitute Parts

Part Overview

The CS20-5.000MABJ-UT is a 5 MHz crystal oscillator manufactured by Citizen Finedevice Co Ltd, designed for surface mount applications requiring fundamental mode operation. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications. The crystal operates at 5.0000 MHz with ±30ppm frequency tolerance and 18pF load capacitance, housed in a 4-SMD, No Lead package measuring 11.60mm x 5.50mm.

Substiute Parts

CS20-5.000MABJ-UT

Citizen Finedevice Co LtdIn Stock: 918CS20-5.000MABJ-UT Datasheet

Current PartRFQ

ABC2-5.000MHZ-4-T

Abracon LLCIn Stock: 798ABC2-5.000MHZ-4-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS20-5.000MABJ-UT is determined by the following critical parameters:

• Frequency: 5 MHz (exact match required)
• Frequency Tolerance: ±30ppm (exact match required)
• Load Capacitance: 18pF (exact match required)
• Operating Mode: Fundamental (exact match required)
• Operating Temperature Range: -10°C ~ 60°C (exact match required)
• Package / Case: 4-SMD, No Lead (exact match required)
• Mounting Type: Surface Mount (exact match required)

The ABC2-5.000MHZ-4-T from Abracon LLC meets all critical substitution criteria. While the ESR differs (80 Ohms versus 150 Ohms), both values fall within acceptable ranges for 5 MHz crystal applications and do not prevent functional substitution. Physical dimensions show minor variations within acceptable tolerances for the same package classification.

Parameter Comparison

Engineering Selection Recommendations

The ABC2-5.000MHZ-4-T is a direct functional substitute for the CS20-5.000MABJ-UT. The primary advantage of selecting the Abracon part is its active product status, ensuring long-term availability and supply chain continuity. The lower ESR value (80 Ohms) may provide improved performance characteristics in certain circuit topologies, though both parts operate within the same fundamental frequency and tolerance specifications.

Both parts share identical export classification (EAR99) and tariff codes (8541.60.0030), simplifying regulatory and procurement documentation. The ABC2-5.000MHZ-4-T carries ROHS3 compliance certification, whereas the original part lists REACH Unaffected status. The Abracon part's MSL classification as Not Applicable indicates different moisture handling requirements compared to the Citizen part's MSL 1 rating.

Physical dimensions are compatible within standard PCB layout tolerances, with the Abracon part measuring 0.20mm longer and 0.20mm shorter in height, representing negligible differences for surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the ABC2-5.000MHZ-4-T replace the CS20-5.000MABJ-UT in existing designs?

A: Yes. Both parts operate at 5 MHz with ±30ppm frequency tolerance, 18pF load capacitance, and identical operating temperature range. The 4-SMD, No Lead package and surface mount configuration are identical, allowing direct PCB substitution without layout modifications.

Q: What is the significance of the ESR difference between the two parts?

A: The CS20-5.000MABJ-UT has 150 Ohms ESR while the ABC2-5.000MHZ-4-T has 80 Ohms ESR. Both values are within acceptable ranges for 5 MHz crystal applications. The lower ESR of the Abracon part may result in lower power consumption and improved frequency stability in certain circuit configurations, but both parts meet the specified frequency tolerance requirements.

Q: Are there any compliance or certification differences?

A: The ABC2-5.000MHZ-4-T carries ROHS3 compliance and REACH Affected status, while the CS20-5.000MABJ-UT lists REACH Unaffected status. Both parts share the same EAR99 export classification and HTSUS tariff code. Verify compliance requirements for your specific application and regulatory jurisdiction.

Q: What are the physical dimension differences?

A: The Abracon part measures 11.80mm x 5.50mm with 2.00mm maximum seated height, compared to the Citizen part at 11.60mm x 5.50mm with 2.20mm maximum seated height. These differences are within standard PCB layout tolerances for surface mount assembly and do not require design modifications.

Q: Why is the original part listed as obsolete?

A: The CS20-5.000MABJ-UT is classified as obsolete by the manufacturer, indicating discontinued production. The ABC2-5.000MHZ-4-T maintains active product status, ensuring continued availability and manufacturer support for new designs and production runs.

Q: Are moisture sensitivity requirements different between the two parts?

A: The CS20-5.000MABJ-UT carries MSL 1 (Unlimited) rating, while the ABC2-5.000MHZ-4-T lists MSL as Not Applicable. Verify moisture handling and storage requirements with the respective manufacturer datasheets for your specific production environment and storage conditions.