Equivalent & Substitute Parts for 1111J500P900CUT

Part Overview

The 1111J500P900CUT is a 0.9 pF ceramic capacitor manufactured by Knowles Syfer, rated for 500V with C0G/NP0 temperature coefficient characteristics. This component is designed for RF and microwave applications requiring high Q, low loss, and ultra-low ESR performance. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

1111J500P900CUT

Knowles SyferIn Stock: 7641111J500P900CUT Datasheet

Current PartRFQ

1111J500P900CQT

Knowles SyferIn Stock: 8821111J500P900CQT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1111J500P900CUT is determined by the following critical parameters:

• Capacitance value: 0.9 pF (exact match required)
• Tolerance: ±0.25pF (exact match required)
• Voltage rating: 500V (minimum requirement)
• Temperature coefficient: C0G/NP0 (required for stability)
• Operating temperature range: -55°C ~ 125°C (minimum requirement)
• Package type: 1111 (2828 Metric) surface mount MLCC (physical compatibility)
• Physical dimensions: 0.110" L x 0.110" W, 0.070" max thickness (PCB layout compatibility)
• Moisture sensitivity: MSL 1 (handling and storage compatibility)

The 1111J500P900CQT meets all substitution criteria as a direct equivalent, with identical electrical specifications and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

The 1111J500P900CQT is the direct substitute for the obsolete 1111J500P900CUT. Both components share identical electrical and physical specifications, ensuring drop-in compatibility in existing designs. The substitute part offers the advantage of active product status, ensuring continued availability and supply chain stability. The 1111J500P900CQT carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for new designs and manufacturing environments. Both parts are classified under ECCN EAR99 and HTSUS 8532.24.0020, maintaining consistent export and tariff classification.

Frequently Asked Questions (FAQ)

Q: Can the 1111J500P900CQT be used as a direct replacement for the 1111J500P900CUT?

A: Yes. Both parts are manufactured by Knowles Syfer with identical capacitance (0.9 pF), tolerance (±0.25pF), voltage rating (500V), temperature coefficient (C0G/NP0), operating temperature range (-55°C ~ 125°C), and physical package dimensions (1111/2828 Metric). No circuit modifications or PCB layout changes are required.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. The 1111J500P900CUT is obsolete, while the 1111J500P900CQT is active. The substitute part also includes ROHS3 compliance and REACH unaffected certifications. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with PCB assembly?

A: No. Both parts use the same 1111 (2828 Metric) surface mount package with identical dimensions (0.110" L x 0.110" W, 0.070" max thickness). Existing PCB designs, pick-and-place programming, and reflow profiles require no modification.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling procedures for surface mount components apply without special moisture control requirements.

Q: Are export classifications the same for both parts?

A: Yes. Both parts are classified as ECCN EAR99 and HTSUS 8532.24.0020, maintaining identical export control and tariff treatment.