Bourns 3366P-1-503 Equivalent & Substitute Parts

Part Overview

The Bourns 3366P-1-503 is a 50 kOhms, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. The 3366 series has been superseded by the active 3362 series, which maintains electrical and mechanical compatibility while offering improved availability and current manufacturing status.

Substiute Parts

3366P-1-503

Bourns Inc.In Stock: 21633366P-1-503 Datasheet

Current PartRFQ

3362P-1-503

Bourns Inc.In Stock: 45003362P-1-503 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3366P-1-503 can be substituted with the Bourns 3362P-1-503 based on the following matching parameters:

• Resistance value: 50 kOhms (identical)
• Power rating: 0.5W, 1/2W (identical)
• Tolerance: ±10% (identical)
• Temperature coefficient: ±100ppm/°C (identical)
• Number of turns: 1 (identical)
• Adjustment type: Top Adjustment (identical)
• Resistive material: Cermet (identical)
• Mounting type: Through Hole (identical)
• Termination style: PC Pins (identical)

The 3362P-1-503 represents the current-generation equivalent within the Bourns trimmer potentiometer portfolio, with active product status and improved market availability.

Parameter Comparison

Engineering Selection Recommendations

The 3362P-1-503 is the appropriate substitute for the obsolete 3366P-1-503 based on electrical parameter equivalence and active product status. All critical electrical specifications—resistance, power rating, tolerance, temperature coefficient, and adjustment characteristics—are identical between the two parts.

The 3362P-1-503 carries active product status with current manufacturing support, whereas the 3366P-1-503 is obsolete. The 3362 series is designated as Trimpot® 3362 - Sealed, indicating enhanced sealing characteristics compared to the legacy 3366 series.

Dimensional differences are minimal: the 3362P-1-503 features a rectangular face (0.275" x 0.260") compared to the square face (0.276" x 0.276") of the 3366P-1-503. These dimensions fall within typical PCB layout tolerances for through-hole trimmer potentiometers.

The 3362P-1-503 is RoHS non-compliant and REACH Affected, consistent with the component category and manufacturing date of this product line.

Frequently Asked Questions (FAQ)

Q: Are the 3366P-1-503 and 3362P-1-503 electrically interchangeable?

A: Yes. Both parts share identical electrical specifications: 50 kOhms resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1-turn adjustment, top adjustment type, and cermet resistive material.

Q: What are the physical differences between these parts?

A: The 3366P-1-503 has a square face measuring 0.276" x 0.276" (7.00mm x 7.00mm), while the 3362P-1-503 has a rectangular face measuring 0.275" x 0.260" (6.99mm x 6.60mm). Both use PC pin through-hole termination. The dimensional difference is approximately 0.001" in width and 0.016" in length.

Q: Why is the 3366P-1-503 listed as obsolete?

A: The 3366 series has been superseded by the 3362 series in Bourns' product portfolio. The 3362 series offers improved sealing and current manufacturing availability.

Q: Can I use the 3362P-1-503 in existing designs specified for the 3366P-1-503?

A: Yes, provided PCB layout accommodates the rectangular face dimension of the 3362P-1-503. The electrical performance and pin configuration are fully compatible.

Q: What is the packaging difference?

A: The 3366P-1-503 is supplied in standard packaging, while the 3362P-1-503 is supplied in tube packaging.