POC-8.000 Equivalent & Substitute Parts

Part Overview

The POC-8.000 is an 8 MHz ceramic resonator with built-in 30 pF capacitor manufactured by Raltron Electronics. This through-hole component operates across -20°C to 80°C with ±0.3% frequency stability and 25 Ohms impedance. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain core electrical specifications including frequency, impedance, mounting type, and operating temperature range to ensure functional compatibility in existing circuit designs.

Substiute Parts

POC-8.000

Raltron ElectronicsIn Stock: 851POC-8.000 Datasheet

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CSTLS8M00G53-A0

Murata ElectronicsIn Stock: 10395CSTLS8M00G53-A0 Datasheet

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CSTLS8M00G53-B0

Murata ElectronicsIn Stock: 105210CSTLS8M00G53-B0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the POC-8.000 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 8 MHz (exact match required)
• Impedance: 25 Ohms (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial - 3 Lead, 2.50mm Pitch (exact match required)
• Operating Temperature Range: -20°C ~ 80°C (minimum coverage required)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

Allowable Variation Parameters:

• Frequency Stability: The POC-8.000 specifies ±0.3%; substitute parts with equal or superior (tighter) stability are acceptable
• Built-in Capacitance: The POC-8.000 specifies 30 pF; substitute parts with different capacitance values are acceptable if circuit design permits external capacitor adjustment or if the substitute's capacitance is functionally equivalent within the application context
• Physical Dimensions: Minor variations in length, width, and height are acceptable provided the radial 3-lead configuration and 2.50mm pitch are maintained

The substitute parts CSTLS8M00G53-A0 and CSTLS8M00G53-B0 satisfy all mandatory matching parameters. Both are manufactured by Murata Electronics, maintain active product status, and provide superior frequency stability (±0.2%) compared to the obsolete POC-8.000.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes: CSTLS8M00G53-A0 and CSTLS8M00G53-B0

Both Murata CERALOCK® CSTLS series parts are direct functional equivalents for the obsolete POC-8.000. Selection between these two substitute parts is based on packaging requirements:

CSTLS8M00G53-A0 (Cut Tape Packaging): Suitable for automated assembly processes and moderate-volume production runs. Cut tape packaging provides component protection during handling and integration with standard pick-and-place equipment.

CSTLS8M00G53-B0 (Bulk Packaging): Suitable for high-volume manufacturing and manual assembly operations. Bulk packaging offers cost efficiency for large-scale procurement.

Compliance and Status Advantages:

Both substitute parts maintain ROHS3 compliance, matching the regulatory status of the original POC-8.000. The Murata parts carry active product status, ensuring long-term availability and manufacturing support. The CSTLS8M00G53-A0 and CSTLS8M00G53-B0 provide superior frequency stability (±0.2%) compared to the POC-8.000 (±0.3%), delivering improved performance in timing-critical applications.

Capacitance Consideration:

The substitute parts feature 15 pF built-in capacitance compared to the POC-8.000's 30 pF. Circuit designs utilizing the POC-8.000 may require external capacitor adjustment when transitioning to the Murata substitutes. The reduced physical dimensions (8.00mm x 3.00mm versus 10.00mm x 5.00mm) and lower height (6.00mm versus 10.00mm) provide improved board space efficiency.

Frequently Asked Questions (FAQ)

Q: Can CSTLS8M00G53-A0 and CSTLS8M00G53-B0 be used interchangeably with POC-8.000?

A: Both Murata parts are functionally equivalent to the POC-8.000 for core electrical specifications including frequency, impedance, operating temperature, and mounting configuration. The primary difference is built-in capacitance (15 pF versus 30 pF), which may require circuit design evaluation. The choice between CSTLS8M00G53-A0 and CSTLS8M00G53-B0 depends on packaging requirements for your manufacturing process.

Q: What is the difference between CSTLS8M00G53-A0 and CSTLS8M00G53-B0?

A: Both parts are electrically identical 8 MHz ceramic resonators with 15 pF built-in capacitance, 25 Ohms impedance, and identical physical dimensions. The sole difference is packaging: CSTLS8M00G53-A0 is supplied in cut tape format suitable for automated assembly, while CSTLS8M00G53-B0 is supplied in bulk format suitable for high-volume manual assembly or tape-and-reel conversion.

Q: Why do the substitute parts have 15 pF capacitance instead of 30 pF?

A: The Murata CERALOCK® CSTLS series is designed with 15 pF built-in capacitance as the standard configuration for 8 MHz resonators. Circuit designs can accommodate this difference through external capacitor adjustment or by selecting alternative Murata models if 30 pF built-in capacitance is required. Consult application-specific circuit requirements before finalizing component selection.

Q: Are the physical dimensions compatible with existing PCB layouts designed for POC-8.000?

A: The substitute parts maintain the same radial 3-lead configuration and 2.50mm pitch as the POC-8.000, ensuring mechanical compatibility with existing through-hole PCB footprints. However, the Murata parts are physically smaller (8.00mm x 3.00mm versus 10.00mm x 5.00mm) and lower profile (6.00mm versus 10.00mm). Verify that your PCB layout accommodates the reduced dimensions; the smaller size typically provides additional board space without requiring footprint redesign.

Q: Do the substitute parts meet the same regulatory and compliance standards?

A: Yes. Both CSTLS8M00G53-A0 and CSTLS8M00G53-B0 are ROHS3 compliant, matching the regulatory status of the POC-8.000. Both parts carry EAR99 ECCN classification and HTSUS code 8548.00.0000, consistent with the original component. REACH status differs: the POC-8.000 is REACH Unaffected, while the Murata substitutes are REACH Affected. Verify REACH compliance requirements for your specific application and end-market.

Q: What is the frequency stability difference between POC-8.000 and the substitute parts?

A: The POC-8.000 specifies ±0.3% frequency stability, while both CSTLS8M00G53-A0 and CSTLS8M00G53-B0 specify ±0.2% frequency stability. The Murata parts provide tighter frequency tolerance, delivering improved performance in timing-sensitive applications. Both maintain ±0.5% frequency tolerance specification.

Q: Is inventory availability a consideration for component selection?

A: The POC-8.000 is obsolete with limited remaining inventory (767 pieces). The Murata substitutes are active products with substantial inventory: CSTLS8M00G53-A0 has 10,300 pieces available, and CSTLS8M00G53-B0 has 105,200 pieces available. For new designs or long-term production support, the active Murata parts ensure procurement continuity and manufacturing support.