1111Y5000820FUT Equivalent & Substitute Parts

Part Overview

The 1111Y5000820FUT is a 82 pF ±1% 500V ceramic capacitor manufactured by Knowles Syfer in the FlexiCap™ series. This surface mount multilayer ceramic capacitor (MLCC) features C0G/NP0 temperature coefficient characteristics and is designed for RF, microwave, and high-frequency applications requiring low loss and ultra-low ESR performance. The part is currently obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

1111Y5000820FUT

Knowles SyferIn Stock: 10931111Y5000820FUT Datasheet

Current PartRFQ

1111Y5000820FQT

Knowles SyferIn Stock: 8201111Y5000820FQT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1111Y5000820FUT is determined by strict equivalence across the following electrical and mechanical parameters:

• Capacitance value: 82 pF (exact match required)
• Tolerance: ±1% (exact match required)
• Voltage rating: 500V (exact match required)
• Temperature coefficient: C0G/NP0 (exact match required)
• Operating temperature range: -55°C ~ 125°C (exact match required)
• Package designation: 1111 (2828 Metric) (exact match required)
• Mounting type: Surface Mount, MLCC (exact match required)
• Physical dimensions: 0.110" L x 0.110" W x 0.070" max thickness (exact match required)
• Moisture sensitivity: MSL 1 (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

The 1111Y5000820FQT meets all substitution criteria as a direct equivalent manufactured by the same supplier with identical electrical specifications and mechanical form factor.

Parameter Comparison

Engineering Selection Recommendations

The 1111Y5000820FQT is the direct equivalent substitute for the obsolete 1111Y5000820FUT. Both parts are manufactured by Knowles Syfer and share identical electrical and mechanical specifications. The substitute part maintains active product status, ensuring continued availability and supply chain support. Both parts comply with ROHS3 requirements and carry MSL 1 moisture sensitivity rating, indicating no special handling requirements. The transition from the FUT to FQT variant represents a standard product line update within the same manufacturer series, with no functional or performance differences in RF, microwave, and high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can the 1111Y5000820FQT be used as a direct replacement for the 1111Y5000820FUT?

A: Yes. The 1111Y5000820FQT is a direct equivalent substitute. Both parts share identical capacitance (82 pF), tolerance (±1%), voltage rating (500V), temperature coefficient (C0G/NP0), operating temperature range (-55°C ~ 125°C), package designation (1111/2828 Metric), and physical dimensions. No circuit modifications or re-qualification are required.

Q: What is the difference between the FUT and FQT part number suffixes?

A: The suffix designates the packaging configuration. Both variants use identical core capacitor elements and electrical specifications. The FQT represents the current active production variant, while the FUT is obsolete. Selection between packaging options should be based on current supply availability and procurement requirements.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant, carry EAR99 ECCN classification, and share identical HTSUS codes (8532.24.0020). Moisture sensitivity level is MSL 1 for both, requiring no special storage or handling procedures.

Q: Can this capacitor be used in high-frequency and RF applications?

A: Yes. The C0G/NP0 temperature coefficient, low ESR, and high Q characteristics make this capacitor suitable for RF, microwave, and high-frequency applications. The 1111 (2828 Metric) package provides appropriate form factor for surface mount assembly in these applications.

Q: What is the physical footprint compatibility?

A: Both parts use the 1111 (2828 Metric) package with identical dimensions: 0.110" L x 0.110" W (2.79mm x 2.79mm) and maximum thickness of 0.070" (1.78mm). PCB footprints and assembly tooling are fully compatible.