72XR500LF Equivalent & Substitute Parts

Part Overview

The 72XR500LF is a 500 Ohm, 0.5W through-hole trimmer potentiometer manufactured by TT Electronics/BI. This cermet-based side-adjustment trimmer features PC pin termination and is rated for 1 turn adjustment with ±10% tolerance and ±100ppm/°C temperature coefficient. The part is ROHS3 compliant and maintains active product status. Substitute parts are identified when equivalent electrical specifications, mechanical mounting compatibility, and functional performance characteristics align with the original design requirements.

Key Parameters

Parameter	Specification
Resistance	500 Ohms
Power Rating	0.5W (1/2W)
Tolerance	±10%
Temperature Coefficient	±100ppm/°C
Number of Turns	1
Adjustment Type	Side Adjustment
Resistive Material	Cermet
Mounting Type	Through Hole
Termination Style	PC Pins

Substitute Part Grouping Explanation

Substitute parts for the 72XR500LF are qualified based on matching electrical parameters: 500 Ohms resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1-turn adjustment, side adjustment mechanism, cermet resistive material, through-hole mounting, and PC pin termination. Physical dimensions and packaging format may vary while maintaining functional equivalence. All substitute parts listed maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Power (Watts)	Tolerance	Temperature Coefficient	Turns	Adjustment Type	Resistive Material	Mounting Type	Termination Style	RoHS Status	Product Status
72XR500LF	TT Electronics/BI	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3329W-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3362S-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3362W-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3362X-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3386H-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3386W-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
3386X-1-501LF	Bourns Inc.	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active
CT-6EX501	Nidec Components Corporation	500 Ohms	0.5W	±10%	±100ppm/°C	1	Side Adjustment	Cermet	Through Hole	PC Pins	ROHS3 Compliant	Active

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and active product status, ensuring regulatory alignment with the 72XR500LF. The Bourns Trimpot 3386 series (3386H-1-501LF, 3386W-1-501LF, 3386X-1-501LF) provides direct dimensional compatibility with the original part, featuring identical square 0.375" x 0.375" (9.53mm x 9.53mm) form factors. The Nidec CT-6EX501 offers equivalent electrical performance with a rectangular form factor. The Bourns 3362 series (3362S-1-501LF, 3362W-1-501LF, 3362X-1-501LF) and 3329W-1-501LF provide functional equivalence with alternative rectangular geometries. Selection should account for available inventory levels and specific PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: What electrical parameters must match for a part to substitute for the 72XR500LF?

A: The substitute part must maintain 500 Ohms resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1-turn adjustment, side adjustment mechanism, cermet resistive material, through-hole mounting, and PC pin termination.

Q: Can I use a substitute part with different physical dimensions?

A: Yes, provided the substitute part maintains all electrical specifications and the PCB layout accommodates the alternative form factor. The Bourns 3386 series maintains the original square geometry, while the 3362 series and CT-6EX501 feature rectangular configurations.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and maintain active product status, ensuring regulatory compliance equivalent to the original 72XR500LF specification.

Q: What is the difference between the Bourns 3362 variants (S, W, X)?

A: The 3362S-1-501LF, 3362W-1-501LF, and 3362X-1-501LF are all Trimpot 3362 sealed series parts with identical electrical specifications and form factors. Differences relate to internal construction and sealing characteristics, not electrical performance.

Q: Can I substitute the 72XR500LF with a part having different resistance or power rating?

A: No. Substitution requires exact matching of the 500 Ohms resistance and 0.5W power rating. Parts with different electrical specifications are not functionally equivalent and will not perform as designed in the circuit.

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