72PR100LF Equivalent & Substitute Parts

Part Overview

The 72PR100LF is a 100 Ohm, 0.5W through-hole trimmer potentiometer manufactured by TT Electronics/BI. This cermet-based component features top adjustment via PC pins and is designed for applications requiring precision resistance tuning in compact form factors. The part is currently active in production with ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Specification
Resistance Value	100 Ohms
Power Rating	0.5W (1/2W)
Tolerance	±10%
Temperature Coefficient	±100ppm/°C
Number of Turns	1.0 Turn
Adjustment Type	Top Adjustment
Resistive Material	Cermet
Mounting Type	Through Hole
Termination Style	PC Pins
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 72PR100LF is determined by strict alignment with the following critical parameters: 100 Ohm resistance value, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1.0 turn configuration, cermet resistive material, through-hole mounting, and PC pin termination. All identified substitutes maintain these core electrical and mechanical specifications. Adjustment type (top vs. side) and physical dimensions represent secondary variations that may affect PCB layout compatibility but do not alter electrical function. Regulatory compliance status (ROHS3, REACH) is documented for each part to support procurement requirements.

Parameter Comparison

Part Number	Manufacturer	Resistance	Power	Tolerance	Temp Coeff	Turns	Adjustment	Material	Mounting	Termination	Size (Face)	RoHS Status
72PR100LF	TT Electronics/BI	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.375" × 0.375" (9.53mm × 9.53mm)	ROHS3
M63M101KB40	Vishay Spectrol	100Ω	0.5W	±10%	±100ppm/°C	1.0	Side	Cermet	Through Hole	PC Pins	0.395" × 0.395" (10.03mm × 10.03mm)	ROHS3
3362F-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.275" × 0.260" (6.99mm × 6.60mm)	ROHS3
3362H-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.275" × 0.260" (6.99mm × 6.60mm)	ROHS3
3362P-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.275" × 0.260" (6.99mm × 6.60mm)	ROHS3
3362R-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.275" × 0.260" (6.99mm × 6.60mm)	ROHS3
3362U-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.275" × 0.260" (6.99mm × 6.60mm)	ROHS3
3386F-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.375" × 0.375" (9.53mm × 9.53mm)	ROHS3
3386G-1-101LF	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.375" × 0.375" (9.53mm × 9.53mm)	ROHS3
3386P-1-101	Bourns Inc.	100Ω	0.5W	±10%	±100ppm/°C	1.0	Top	Cermet	Through Hole	PC Pins	0.375" × 0.375" (9.53mm × 9.53mm)	RoHS non-compliant

Engineering Selection Recommendations

All listed substitutes maintain electrical equivalence to the 72PR100LF across resistance, power rating, tolerance, and temperature coefficient specifications. Selection among substitutes should prioritize ROHS3 compliance for regulatory alignment. The 3362 series (3362F-1-101LF, 3362H-1-101LF, 3362P-1-101LF, 3362R-1-101LF, 3362U-1-101LF) and 3386 series with ROHS3 designation (3386F-1-101LF, 3386G-1-101LF) are fully compliant alternatives. The M63M101KB40 from Vishay Spectrol provides equivalent electrical performance with ROHS3 compliance but features side adjustment and slightly larger dimensions (0.395" × 0.395" vs. 0.375" × 0.375"), requiring PCB layout verification. The 3386P-1-101 is electrically equivalent but carries RoHS non-compliant status and should be avoided in applications with regulatory requirements. Bourns Trimpot 3362 series variants differ primarily in internal construction and packaging format (tube vs. bulk) while maintaining identical electrical and mechanical interfaces. Physical footprint differences between square (0.375" × 0.375") and rectangular (0.275" × 0.260") configurations must be evaluated against PCB design constraints.

Frequently Asked Questions (FAQ)

Q: Can the M63M101KB40 replace the 72PR100LF directly on the PCB?

A: Electrical substitution is valid; however, the M63M101KB40 features side adjustment versus top adjustment on the 72PR100LF, and its slightly larger footprint (0.395" × 0.395" vs. 0.375" × 0.375") requires PCB layout verification to confirm clearance and accessibility for adjustment.

Q: What is the difference between the 3362 and 3386 Bourns series?

A: Both series maintain identical electrical specifications (100Ω, 0.5W, ±10%, ±100ppm/°C, 1.0 turn, cermet, through-hole, PC pins). The 3362 series uses a rectangular footprint (0.275" × 0.260"), while the 3386 series uses a square footprint (0.375" × 0.375") matching the 72PR100LF. Series selection depends on available PCB space and design requirements.

Q: Are all substitutes ROHS3 compliant?

A: No. The 3386P-1-101 is RoHS non-compliant and should not be used in applications requiring regulatory compliance. All other listed substitutes carry ROHS3 compliance status.

Q: Does adjustment type (top vs. side) affect electrical performance?

A: No. Adjustment type is a mechanical interface characteristic only and does not alter electrical function, resistance value, or performance specifications. Selection is based on PCB layout and operator accessibility requirements.

Q: Can I use the smaller 3362 series in place of the 72PR100LF?

A: Electrical substitution is valid. However, the 3362 series has a smaller rectangular footprint (0.275" × 0.260" vs. 0.375" × 0.375"), which may require PCB redesign. Verify mounting hole spacing and clearance before implementation.

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