Knowles Johanson Manufacturing 17273 Trimmer Capacitor - Equivalent & Substitute Parts

Part Overview

The Knowles Johanson Manufacturing 17273 is an active, production-status trimmer capacitor designed for surface mount applications. This component is a 0.6 ~ 4.5pF variable capacitor rated at 500V with top-side adjustment capability, part of the Giga-Trim® series. Finding equivalent and substitute parts may be necessary due to inventory constraints, lead time requirements, or specific application needs while maintaining electrical and mechanical compatibility.

Substiute Parts

17273

Knowles Johanson ManufacturingIn Stock: 104517273 Datasheet

Current PartRFQ

47273

Knowles Johanson ManufacturingIn Stock: 1299347273 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Knowles Johanson Manufacturing 47273 is classified as a parametric equivalent to the 17273 based on the following critical substitution criteria:

Matching Parameters (Substitution Basis):

• Capacitance Range: 0.6 ~ 4.5pF (identical)
• Voltage - Rated: 500 V (identical)
• Adjustment Type: Top (identical)
• Dielectric Material: Alumina (identical)
• Size / Dimension: 0.150" Dia (3.81mm) (identical)
• Height - Seated (Max): 0.330" (8.38mm) (identical)
• Operating Temperature: -65°C ~ 125°C (identical)
• Mounting Type: Surface Mount (identical)
• Series: Giga-Trim® (identical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)

Differing Parameters:

• Q @ Freq: 17273 = 2000 @ 250MHz; 47273 = 3000 @ 250MHz
• RoHS Status: 17273 = RoHS Compliant; 47273 = ROHS3 Compliant

The 47273 maintains full electrical and mechanical compatibility with the 17273 across all critical substitution parameters. The higher Q factor in the 47273 represents an improvement in performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both the 17273 and 47273 are active production components from Knowles Johanson Manufacturing. The 47273 carries ROHS3 compliance, representing current regulatory alignment. Both parts meet identical electrical specifications for capacitance range, voltage rating, and operating temperature. The 47273 demonstrates a higher Q factor at 250MHz (3000 versus 2000), indicating superior performance in high-frequency applications. Selection between these parts should be based on inventory availability, lead time requirements, and specific application frequency performance needs.

Frequently Asked Questions (FAQ)

Q: Can the 47273 be used as a direct replacement for the 17273?

A: Yes. The 47273 is a parametric equivalent with identical capacitance range (0.6 ~ 4.5pF), voltage rating (500V), adjustment type (top), dielectric material (alumina), physical dimensions (0.150" diameter, 0.330" max height), operating temperature range (-65°C ~ 125°C), and mounting type (surface mount). Both are Giga-Trim® series components with MSL 1 rating.

Q: What is the difference in Q factor between these parts?

A: The 17273 has a Q factor of 2000 @ 250MHz, while the 47273 has a Q factor of 3000 @ 250MHz. The higher Q factor in the 47273 indicates lower losses and better performance in high-frequency circuit applications.

Q: Are there any compliance differences?

A: The 17273 is RoHS Compliant, while the 47273 is ROHS3 Compliant. Both meet environmental and regulatory requirements. ROHS3 represents the current regulatory standard.

Q: Will these parts fit in the same PCB footprint?

A: Yes. Both parts have identical physical dimensions: 0.150" diameter (3.81mm) and maximum seated height of 0.330" (8.38mm). They are both surface mount components and will occupy the same board space.

Q: Are there any moisture sensitivity concerns?

A: No. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity limitations for storage or handling.