By Suntan Technology Company Limited · Updated
A trimming potentiometer provides adjustable resistance for setting a circuit during setup or calibration. When selecting among the Suntan TSR models covered here, combine the required electrical characteristics with a terminal layout and adjustment direction that suit the PCB. Use the 6 mm or 8 mm category where listed to begin a shortlist, then check the exact model and style drawing before making a selection.
What can the 6 mm and 8 mm categories tell you?
These labels help organize the model range, but they do not specify a complete installation footprint. Body dimensions, terminal spacing, PCB mounting holes and adjustment clearance must come from the drawing for the chosen configuration.
| Model / Product page | Published category / construction | Drawing check for selection | Datasheet |
|---|---|---|---|
| TSR-105H | Sealed phenolic type; use its model-specific dimensions | Match the identified model to its drawing; confirm any TSR-103H reference separately. | |
| TSR-625 | 6 mm round, cermet, open frame | Compare the selected C/M style drawing with the PCB layout and tool access. | |
| TSR-805 | 8 mm round, cermet, open frame | Review both PDF pages for the selected terminal pattern and body/cover dimensions. | |
| TSR-825 | 8 mm round, cermet, open frame | Use its own style drawings to assess lead positions, mounting direction and clearance. | |
| TSR-855 | 8 mm round, cermet, open frame | Compare the M-F, M-R, S-F and S-R drawings for the required configuration. | |
| TSR-3318 | 6 mm, sealed phenolic type | Compare the K and F drawings, including their PCB mounting patterns. |
How do you choose between TSR-625 and TSR-805?
Start with the PCB layout and the direction from which the adjustment tool will approach. TSR-625 belongs to the 6 mm group and TSR-805 to the 8 mm group; both datasheets describe single-turn cermet open-frame types with mounting and adjustment options. Check the exact terminal style and available space, then compare each model's electrical and environmental requirements with the circuit conditions.
How should TSR-805, TSR-825 and TSR-855 be compared?
Place the selected style drawings beside the proposed PCB layout. Compare pin positions, body and cover dimensions, mounting orientation and adjustment access. Similar product photographs or a shared 8 mm category do not confirm that the same PCB footprint can be used.
Which checks belong in a trimmer selection checklist?
- Define the adjustment requirement. Record the target resistance, allowable tolerance, taper where applicable and intended setup procedure.
- Check the operating conditions. Review the chosen model's power, voltage, temperature and other relevant limits. Keep any TK-specific entries separate.
- Match the mechanical drawing. Check terminal positions, mounting holes, component height and surrounding clearance for the exact style.
- Confirm adjustment access. Allow room for the tool after nearby components, shields and the enclosure are fitted.
- Evaluate the selected configuration. Record the full model/style and verify a suitable sample in the intended design before final selection.
If your reference is TSR-103H, ask Suntan Technology Company Limited to confirm its applicable ratings and mechanical details separately. Its appearance in the TSR-105H PDF drawing does not establish that TSR-105H specifications apply.
What questions help during PCB and assembly review?
Can a product photograph confirm the PCB footprint?
Use the photograph to identify a candidate for review. Obtain the selected dimensional drawing and compare it with the PCB layout before purchasing parts or releasing the board.
When should adjustment-tool access be checked?
Check it while reviewing the PCB and enclosure together. Show the proposed tool approach and resolve clearance around nearby parts before choosing the final terminal style.
What helps compare samples consistently?
Use the same defined setup procedure and circuit conditions for the shortlisted parts. Record the adjustment result, mechanical fit and tool access against each complete model/style reference.
Use the official Suntan trimming potentiometer series page and the model datasheets above to continue your comparison. For a sample or quotation review, send your preferred model/style, resistance and tolerance, circuit conditions, mounting restrictions and estimated quantities to Suntan.