Knowles Voltronics P5F Trimmer Capacitor: Equivalent & Substitute Parts

Part Overview

The Knowles Voltronics P5F is a 0.6–4.5 pF trimmer capacitor rated for 500 V operation with top-adjustment capability and sapphire dielectric construction. Designed for surface mount applications, this component delivers a Q factor of 3000 at 250 MHz and operates across the temperature range of –65°C to 125°C. The P5F is classified as obsolete, making identification of functionally equivalent active alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P5F

Knowles VoltronicsIn Stock: 1235P5F Datasheet

Current PartRFQ

27273

Knowles Johanson ManufacturingIn Stock: 108127273 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P5F is determined by strict equivalence across the following critical parameters:

• Capacitance Range: 0.6–4.5 pF (exact match required)
• Voltage Rating: 500 V (exact match required)
• Dielectric Material: Sapphire (exact match required)
• Adjustment Type: Top (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Q Factor @ 250 MHz: 3000 (exact match required)
• Operating Temperature Range: –65°C to 125°C (exact match required)
• Physical Footprint: 0.140" Dia (4.66 mm) (exact match required)

The Knowles Johanson Manufacturing part number 27273 (Giga-Trim® series) meets all substitution criteria and is classified as an active product, providing long-term availability and design continuity.

Parameter Comparison

Engineering Selection Recommendations

The Knowles Johanson Manufacturing 27273 is the direct functional equivalent for the obsolete P5F. Both components share identical electrical specifications, dielectric properties, and physical footprints. The 27273 offers the advantage of active product status, ensuring continued availability and supply chain reliability. The 27273 is ROHS3 compliant, meeting current environmental and regulatory standards. The marginal height difference (0.314" versus 0.329") is within typical PCB layout tolerances and does not affect electrical performance or mechanical fit in standard surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the 27273 be used as a direct replacement for the P5F in existing designs?

A: Yes. The 27273 meets all electrical and mechanical specifications of the P5F. The minor height difference (0.015") is negligible for surface mount assembly and does not impact circuit performance or board layout.

Q: What is the significance of the Giga-Trim® designation on the 27273?

A: Giga-Trim® is the product series name assigned by Knowles Johanson Manufacturing. It does not alter the electrical or mechanical equivalence of the component.

Q: Does the ROHS3 compliance of the 27273 affect compatibility with the P5F?

A: No. ROHS3 compliance indicates adherence to environmental standards and does not change the component's electrical characteristics or physical compatibility.

Q: Are there any packaging differences between the P5F and 27273?

A: The P5F is specified with dash packaging, while the 27273 is supplied in bulk packaging. This distinction applies only to procurement and handling; the components themselves are electrically and mechanically identical.

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

A: Both components carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices apply.