RFCS04029000DBTTS Equivalent & Substitute Parts

Part Overview

The RFCS04029000DBTTS is a 0.9 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 design support and production continuity. The silicon capacitor technology and ultra-low capacitance value position this part for precision RF and high-frequency applications requiring minimal parasitic effects.

Substiute Parts

RFCS04029000DBTTS

Vishay Electro-FilmsIn Stock: 774RFCS04029000DBTTS Datasheet

Current PartRFQ

04021J0R9PBSTR

KYOCERA AVXIn Stock: 125504021J0R9PBSTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RFCS04029000DBTTS is determined by the following critical parameters:

Capacitance value must remain 0.9 pF to maintain circuit performance and frequency response characteristics. The 0402 (1005 Metric) package footprint is mandatory for mechanical and electrical compatibility with existing PCB layouts. Operating temperature range of -55°C ~ 125°C establishes the thermal operating envelope. Voltage rating of the substitute must equal or exceed the original 50 V specification. RoHS3 compliance and MSL 1 classification ensure regulatory and manufacturing process compatibility.

The substitute part 04021J0R9PBSTR from KYOCERA AVX meets these core substitution criteria through matching capacitance, package, temperature range, and compliance certifications, while offering enhanced voltage rating and improved tolerance specifications.

Parameter Comparison

Engineering Selection Recommendations

The 04021J0R9PBSTR substitute part is suitable for direct replacement based on the following factors:

Identical capacitance value and package footprint ensure electrical and mechanical compatibility. The substitute maintains the required operating temperature range and MSL classification. Both parts carry ROHS3 compliance certification. The substitute part is currently in active production status, providing supply chain continuity and availability advantages over the obsolete original part. The enhanced voltage rating (100 V versus 50 V) and improved tolerance (±0.02 pF versus ±0.1 pF) of the substitute provide additional design margin and performance stability.

Frequently Asked Questions (FAQ)

Q: Can the 04021J0R9PBSTR be used as a direct replacement for RFCS04029000DBTTS?

A: Yes. Both parts share identical capacitance (0.9 pF), package (0402), and operating temperature range (-55°C ~ 125°C). The substitute meets or exceeds all critical electrical and mechanical parameters.

Q: What are the key differences between these parts?

A: The substitute offers higher voltage rating (100 V versus 50 V), tighter tolerance (±0.02 pF versus ±0.1 pF), and active product status versus obsolete. The substitute uses thin film technology compared to the original silicon capacitor technology.

Q: Are there any package or footprint compatibility concerns?

A: No. Both parts use the 0402 (1005 Metric) package with identical footprint dimensions, ensuring PCB compatibility without layout modifications.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both parts are ROHS3 compliant with MSL 1 (Unlimited) classification, meeting standard manufacturing and regulatory requirements.

Q: Why is the original part obsolete?

A: The RFCS04029000DBTTS is classified as obsolete by the manufacturer. The 04021J0R9PBSTR provides an active, supported alternative for continued design implementation and production.