RFCS04028000DBTTS Equivalent & Substitute Parts

Part Overview

The RFCS04028000DBTTS is a 0.8 pF silicon capacitor manufactured by Vishay Electro-Films, rated for 50 V operation in a 0402 (1005 Metric) surface mount package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The silicon capacitor technology and ultra-low capacitance value position this part for high-frequency RF and precision circuit applications where stable, low-loss performance is required.

Substiute Parts

RFCS04028000DBTTS

Vishay Electro-FilmsIn Stock: 1129RFCS04028000DBTTS Datasheet

Current PartRFQ

04021J0R8PBSTR

KYOCERA AVXIn Stock: 169004021J0R8PBSTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RFCS04028000DBTTS is determined by the following critical parameters:

• Capacitance Value: 0.8 pF (exact match required)
• Package / Case: 0402 (1005 Metric) surface mount form factor
• Operating Temperature Range: -55°C ~ 125°C minimum
• Voltage Rating: Minimum 50 V (higher ratings acceptable)
• Moisture Sensitivity Level: MSL 1 or better
• RoHS Compliance: ROHS3 Compliant

The substitute part 04021J0R8PBSTR from KYOCERA AVX meets all substitution criteria. While the original part uses silicon capacitor technology and the substitute employs thin film technology, both deliver the required 0.8 pF capacitance in the identical 0402 package with compatible electrical and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The 04021J0R8PBSTR substitute part is suitable for direct replacement of the RFCS04028000DBTTS based on the following factors:

• Identical Capacitance: Both parts deliver 0.8 pF with compatible tolerance specifications
• Package Compatibility: Identical 0402 (1005 Metric) footprint ensures PCB layout compatibility without modification
• Voltage Margin: The substitute's 100 V rating exceeds the original 50 V requirement, providing additional safety margin
• Temperature Performance: Matching -55°C ~ 125°C operating range ensures thermal compatibility across all specified conditions
• Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 rating, supporting identical supply chain and storage requirements
• Active Product Status: The substitute is in active production, ensuring long-term availability and supply chain stability

Frequently Asked Questions (FAQ)

Q: Can the 04021J0R8PBSTR be used as a direct drop-in replacement for the RFCS04028000DBTTS?

A: Yes. Both parts share identical 0402 package dimensions, capacitance value, and operating temperature range. No PCB modifications are required.

Q: What is the difference between silicon and thin film capacitor technology in this application?

A: The original uses silicon capacitor technology while the substitute uses thin film technology. Both technologies deliver the specified 0.8 pF capacitance with stable performance across the -55°C ~ 125°C operating range. The thin film substitute offers tighter tolerance (±0.02 pF vs. ±0.1 pF).

Q: Does the higher voltage rating of the substitute part affect circuit performance?

A: No. The 100 V rating of the substitute exceeds the 50 V requirement, providing additional voltage margin without affecting capacitance value or frequency response characteristics.

Q: Are there any supply chain advantages to using the substitute part?

A: Yes. The substitute (04021J0R8PBSTR) is in active production status, whereas the original RFCS04028000DBTTS is obsolete. This ensures consistent availability and eliminates long-lead-time risk.

Q: Do both parts meet the same compliance and moisture sensitivity requirements?

A: Yes. Both parts are ROHS3 compliant with MSL 1 (Unlimited) rating, ensuring identical handling, storage, and environmental compliance requirements.