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72PMR500LF Equivalent & Substitute Parts
Part Overview
The 72PMR500LF is a 500 Ohm, 0.5W through-hole trimmer potentiometer manufactured by TT Electronics/BI. This cermet-based component features top adjustment, PC pin termination, and a square 0.375" x 0.375" form factor. The part is active and ROHS3 compliant. Substitute parts are necessary when the primary part is unavailable, when alternative adjustment types or form factors better suit application requirements, or when different packaging options are preferred for production workflows.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 500 Ohms |
| 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) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by strict electrical and mechanical parameter matching. All substitute parts share the core electrical specifications: 500 Ohms resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, and 1-turn operation with cermet resistive material. All parts feature through-hole mounting with PC pin termination and are ROHS3 compliant.
Substitutes are grouped into two categories based on adjustment type and form factor:
Category 1: Top Adjustment, Rectangular Form Factor (6.99mm x 6.60mm) Parts with top adjustment and smaller rectangular dimensions: 3362H-1-501, 3362H-1-501LF, 3362P-1-501LF, 3362R-1-501LF, 3362U-1-501LF, 3362U-1-501RLF
Category 2: Top Adjustment, Square Form Factor (9.53mm x 9.53mm) Parts with top adjustment and matching square dimensions: 3386G-1-501LF, 3386K-1-501LF, 3386P-1-501LF
Category 3: Side Adjustment, Square Form Factor (10.03mm x 10.03mm) Part with side adjustment and slightly larger square dimensions: M63M501KB40
Parameter Comparison
| Part Number | Manufacturer | Resistance | Power | Tolerance | Temp Coeff | Turns | Adjustment | Material | Termination | Size (Face) | RoHS | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 72PMR500LF | TT Electronics/BI | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.375" x 0.375" (9.53mm) | ROHS3 | 747 Pcs |
| 3362H-1-501 | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | Non-compliant | 1117 Pcs |
| 3362H-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | ROHS3 | 3800 Pcs |
| 3362P-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | ROHS3 | 65800 Pcs |
| 3362R-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | ROHS3 | 5543 Pcs |
| 3362U-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | ROHS3 | 1146 Pcs |
| 3362U-1-501RLF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.275" x 0.260" (6.99mm x 6.60mm) | ROHS3 | 1700 Pcs |
| 3386G-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.375" x 0.375" (9.53mm) | ROHS3 | 1002 Pcs |
| 3386K-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.375" x 0.375" (9.53mm) | ROHS3 | 987 Pcs |
| 3386P-1-501LF | Bourns Inc. | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Top | Cermet | PC Pins | 0.375" x 0.375" (9.53mm) | ROHS3 | 4393 Pcs |
| M63M501KB40 | Vishay Spectrol | 500Ω | 0.5W | ±10% | ±100ppm/°C | 1 | Side | Cermet | PC Pins | 0.395" x 0.395" (10.03mm) | ROHS3 | 1310 Pcs |
Engineering Selection Recommendations
Direct Form Factor Match (Recommended for Direct Substitution)
The 3386G-1-501LF, 3386K-1-501LF, and 3386P-1-501LF maintain the original 0.375" x 0.375" square form factor with top adjustment. All three are ROHS3 compliant and active products. The 3386P-1-501LF offers the highest inventory availability at 4393 pieces. These parts are suitable for applications where PCB layout and mechanical fit are critical constraints.
Compact Form Factor Alternative
The 3362H-1-501LF, 3362P-1-501LF, 3362R-1-501LF, 3362U-1-501LF, and 3362U-1-501RLF feature a smaller rectangular form factor (0.275" x 0.260"). All are ROHS3 compliant and active. The 3362P-1-501LF provides the largest inventory at 65800 pieces and is suitable for space-constrained applications. The 3362U-1-501RLF is available in cut tape packaging for automated assembly workflows.
Side Adjustment Alternative
The M63M501KB40 from Vishay Spectrol provides side adjustment instead of top adjustment, with a slightly larger square form factor (0.395" x 0.395"). This part is ROHS3 compliant and active, with 1310 pieces in inventory. Side adjustment is suitable for applications where top-mounted components create accessibility or assembly constraints.
Legacy Compliance Consideration
The 3362H-1-501 is RoHS non-compliant and should be selected only when legacy system requirements explicitly mandate non-compliant components.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 72PMR500LF with a 3362 series trimmer potentiometer?
A: Yes. The 3362H-1-501LF, 3362P-1-501LF, 3362R-1-501LF, 3362U-1-501LF, and 3362U-1-501RLF are electrically equivalent with identical resistance, power rating, tolerance, and temperature coefficient. The primary difference is the rectangular form factor (0.275" x 0.260" versus 0.375" x 0.375"). Verify PCB layout compatibility before substitution.
Q: What is the difference between the 3362 and 3386 series?
A: Both series share identical electrical specifications for the 500 Ohm, 0.5W configuration. The 3386 series maintains the original square form factor (0.375" x 0.375"), while the 3362 series uses a smaller rectangular form factor (0.275" x 0.260"). The 3386 series is suitable for direct mechanical replacement.
Q: Can I use the M63M501KB40 as a direct replacement?
A: The M63M501KB40 is electrically equivalent but features side adjustment instead of top adjustment and a slightly larger form factor (0.395" x 0.395"). Use this part only when side adjustment is compatible with your application and PCB layout accommodates the larger dimensions.
Q: What packaging options are available?
A: The 72PMR500LF is supplied in bulk packaging. Substitute parts are available in tube packaging (3362H, 3362P, 3362R, 3362U, 3386G, 3386K, 3386P series) and cut tape packaging (3362U-1-501RLF). The M63M501KB40 is supplied in box packaging.
Q: Are all substitute parts ROHS3 compliant?
A: All substitute parts listed are ROHS3 compliant except the 3362H-1-501, which is RoHS non-compliant. Verify compliance requirements for your application before selection.
Q: Which substitute offers the highest inventory availability?
A: The 3362P-1-501LF offers the highest inventory at 65800 pieces, followed by the 3362H-1-501LF at 3800 pieces.
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