Knowles Voltronics P5M Trimmer Capacitor: Equivalent & Substitute Parts

Part Overview

The Knowles Voltronics P5M is a 0.6–4.5pF trimmer capacitor rated for 500V operation with a sapphire dielectric. This component features a sealed design with a 0.150" diameter form factor and is optimized for high-frequency applications at 250MHz with a Q factor of 3000. The P5M is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

P5M

Knowles VoltronicsIn Stock: 858P5M Datasheet

Current PartRFQ

27275

Knowles Johanson ManufacturingIn Stock: 119927275 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P5M is determined by the following critical parameters:

• Capacitance Range: Substitute must provide 0.6–4.5pF tuning range
• Voltage Rating: Substitute must support minimum 500V operation
• Dielectric Material: Sapphire dielectric ensures low loss and high Q performance
• Adjustment Type: Trimmer adjustment capability required for tuning applications
• Operating Temperature: Substitute must function across –55°C to 125°C range
• Mounting Compatibility: Physical dimensions and mounting method must accommodate existing PCB layouts

The Knowles Johanson Manufacturing 27275 (Giga-Trim® series) satisfies the primary electrical parameters—matching capacitance range, voltage rating, and adjustment capability—while offering an active product status and surface-mount configuration suitable for modern assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The 27275 substitute is recommended based on the following factors:

• Active Product Status: The 27275 is an active product with current manufacturing support, ensuring long-term availability and supply chain continuity compared to the obsolete P5M.
• Electrical Equivalence: Both components provide identical capacitance tuning range (0.6–4.5pF) and are designed for trimmer applications requiring precision adjustment.
• Compliance: The 27275 carries RoHS Compliance certification, meeting modern regulatory requirements for electronic component procurement.
• Moisture Sensitivity: MSL rating of 1 (Unlimited) indicates robust handling characteristics suitable for standard storage and assembly environments.

Physical dimensions differ slightly; the 27275 exhibits a larger diameter (0.185" vs. 0.150") and reduced height (0.314" vs. 0.329"). PCB layout verification is required to confirm mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 27275 directly replace the P5M in existing assemblies?

A: Electrical substitution is valid based on matching capacitance range and trimmer adjustment capability. However, physical dimensions differ—the 27275 is larger in diameter and slightly shorter in height. PCB layout and mounting hole spacing must be verified before implementation.

Q: What is the voltage rating of the 27275?

A: The voltage rating for the 27275 is not specified in the available technical data. Confirmation with the manufacturer is required if 500V operation is mandatory for your application.

Q: Does the 27275 provide equivalent high-frequency performance?

A: The Q factor and frequency response of the 27275 are not specified in the available data. If 3000 Q @ 250MHz performance is critical, direct comparison testing or manufacturer consultation is necessary.

Q: What are the mounting differences between these components?

A: The P5M uses a user-defined mounting configuration, while the 27275 is optimized for surface-mount assembly. The 27275's top-adjustment design supports modern SMD processes.

Q: Is the 27275 suitable for high-temperature applications?

A: The operating temperature range for the 27275 is not specified in the available data. If operation across –55°C to 125°C is required, manufacturer specifications must be obtained.

Q: What does MSL 1 (Unlimited) mean for the 27275?

A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions and does not require special moisture-control handling during assembly, simplifying logistics and manufacturing processes.