Bourns 3386R-1-502 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3386R-1-502 is a 5 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3386 series component is actively manufactured and widely used in circuit board calibration and tuning applications. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional equivalence within the through-hole trimmer potentiometer category.

Key Parameters

Parameter	Value
Resistance	5 kOhms
Power Rating	0.5W (1/2W)
Tolerance	±10%
Temperature Coefficient	±100ppm/°C
Number of Turns	1
Adjustment Type	Top Adjustment
Resistive Material	Cermet
Mounting Type	Through Hole
Termination Style	PC Pins
Size	Square - 0.375" x 0.375" (9.53mm x 9.53mm)

Substitute Part Grouping Explanation

Substitute parts for the 3386R-1-502 are classified based on electrical and mechanical parameter alignment:

Direct Equivalent (Identical Specifications): Parts matching all key parameters including resistance, power rating, tolerance, temperature coefficient, number of turns, adjustment type, resistive material, mounting type, termination style, and physical dimensions.

Functional Equivalent (Matching Electrical Specifications with Minor Mechanical Variations): Parts with identical electrical characteristics but differing in physical size, adjustment location, or series designation. These maintain circuit functionality while accommodating different PCB layout constraints.

Key Parameters for Substitution Eligibility:

Resistance value: 5 kOhms
Power rating: 0.5W minimum
Tolerance: ±10% or better
Temperature coefficient: ±100ppm/°C or better
Number of turns: 1
Resistive material: Cermet
Mounting type: Through Hole
Termination style: PC Pins

Parameter Comparison

Part Number	Manufacturer	Resistance	Power (W)	Tolerance	Temp Coeff (ppm/°C)	Turns	Adjustment	Material	Size (Face)	RoHS Status
3386R-1-502	Bourns Inc.	5 kOhms	0.5	±10%	±100	1	Top	Cermet	0.375" x 0.375" (9.53mm)	Non-compliant
3386R-1-502LF	Bourns Inc.	5 kOhms	0.5	±10%	±100	1	Top	Cermet	0.375" x 0.375" (9.53mm)	ROHS3 Compliant
25PR5KLF	TT Electronics/BI	5 kOhms	0.5	±10%	±100	1	Top	Cermet	0.270" x 0.270" (6.86mm)	RoHS Compliant
72PMR5KLF	TT Electronics/BI	5 kOhms	0.5	±10%	±100	1	Top	Cermet	0.375" x 0.375" (9.53mm)	ROHS3 Compliant
72PR5KLF	TT Electronics/BI	5 kOhms	0.5	±10%	±100	1	Top	Cermet	0.375" x 0.375" (9.53mm)	ROHS3 Compliant
82PR5KLF	TT Electronics/BI	5 kOhms	0.5	±10%	±100	1	Top	Cermet	Round - 0.250" Dia (6.35mm)	ROHS3 Compliant
M63P502KB40	Vishay Spectrol	5 kOhms	0.5	±10%	±100	1	Side	Cermet	0.395" x 0.395" (10.03mm)	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (No Design Changes Required):

3386R-1-502LF (Bourns Inc.): Identical to the main part with ROHS3 compliance. Recommended for new designs and RoHS-regulated applications.

Functional Substitutes (Same Electrical Performance, Design Considerations Required):

72PMR5KLF and 72PR5KLF (TT Electronics/BI): Maintain identical electrical specifications and physical footprint (0.375" x 0.375"). Both are ROHS3 compliant. Suitable for direct PCB substitution.
25PR5KLF (TT Electronics/BI): Electrically equivalent but with reduced physical size (0.270" x 0.270"). Requires PCB layout verification for space-constrained applications. RoHS compliant.
82PR5KLF (TT Electronics/BI): Electrically equivalent with round package geometry (0.250" diameter). Requires PCB footprint redesign. ROHS3 compliant.
M63P502KB40 (Vishay Spectrol): Electrically equivalent with side adjustment instead of top adjustment. Requires design modification for adjustment access. ROHS3 compliant.

Compliance Considerations: All substitute parts except the original 3386R-1-502 carry RoHS compliance certifications, making them suitable for regulated markets and new product development.

Frequently Asked Questions (FAQ)

Q: Can 3386R-1-502LF be used as a direct replacement for 3386R-1-502? A: Yes. The 3386R-1-502LF is electrically and mechanically identical to the 3386R-1-502, with the addition of ROHS3 compliance. It is the recommended substitute for all applications.

Q: What is the difference between top adjustment and side adjustment models? A: Top adjustment (3386R-1-502, 72PMR5KLF, 72PR5KLF, 25PR5KLF, 82PR5KLF) allows potentiometer tuning from the component's upper surface. Side adjustment (M63P502KB40) requires access from the component's side. Adjustment type selection depends on PCB layout and accessibility requirements.

Q: Are the TT Electronics/BI 72 series parts (72PMR5KLF, 72PR5KLF) interchangeable with the Bourns 3386R series? A: Yes, electrically and mechanically. Both 72PMR5KLF and 72PR5KLF maintain the same 0.375" x 0.375" footprint, electrical specifications, and top adjustment configuration. Both are ROHS3 compliant.

Q: Can 25PR5KLF be used in place of 3386R-1-502 on existing PCBs? A: 25PR5KLF is electrically equivalent but physically smaller (0.270" x 0.270" versus 0.375" x 0.375"). PCB footprint verification is required before substitution. The smaller size may allow use in space-constrained designs.

Q: What is the significance of the "LF" suffix in part numbers? A: The "LF" suffix indicates lead-free termination, consistent with RoHS compliance requirements. Parts with this designation are suitable for lead-free soldering processes.

Q: Is M63P502KB40 suitable for applications requiring top adjustment? A: No. M63P502KB40 features side adjustment, requiring design modification for potentiometer access. It is electrically equivalent but not mechanically compatible with designs requiring top adjustment.

Q: What packaging formats are available for these substitutes? A: The original 3386R-1-502 and 3386R-1-502LF are supplied in Tube packaging. TT Electronics/BI parts (25PR5KLF, 72PMR5KLF, 72PR5KLF, 82PR5KLF) and Vishay Spectrol M63P502KB40 are supplied in Bulk packaging. Packaging selection depends on procurement and assembly requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message