Choosing a Suntan TSR Trimming Potentiometer
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Choose a Suntan TSR trimming potentiometer by matching the required resistance, tolerance, terminal layout and adjustment access to the exact model and style datasheet. A 6mm or 8mm description is a starting point; the mounting drawing determines how the part fits the board. Use the documented options from Suntan Technology Company Limited to check the complete requirement before confirming a selection.
What is a trimming potentiometer?
A trimming potentiometer provides an adjustable resistance setting. It typically has two end terminals and a movable contact, called the wiper. The circuit symbol and terminal numbering in the selected model’s datasheet identify how those connections relate to the component.
The Suntan TSR models discussed here are single-turn types. For selection, the useful question is how the chosen configuration meets the electrical requirement and allows access for adjustment after installation.
How do you choose a Suntan TSR trimming potentiometer?
- Set the nominal resistance. Start with the circuit requirement, then check the model’s standard resistance table. A published range does not establish that every intermediate resistance value is a standard option.
- Specify resistance tolerance separately. Record the permitted variation in the nominal end-to-end resistance. Keep this requirement separate from the resistance setting or circuit output you intend to adjust.
- Match the terminal layout and mounting arrangement. Compare body dimensions, terminal spacing, mounting holes and clearance with the actual PCB drawing. Check the terminal numbering as well as the physical fit.
- Check adjustment access. Decide whether the adjustment tool approaches from the front or above, and review the selected style drawing. Include nearby components, enclosure clearance and the intended board orientation in the check.
- Review the applicable working conditions. Check the model-specific power, working-voltage, temperature and process information. Retain distinctions such as TK-specific entries, and ask Suntan to clarify any rating or condition that is unclear.
How do you choose between TSR-625 and TSR-805?
Start with the installation drawing. The TSR-625 datasheet identifies a 6mm round single-turn cermet open-frame type, while the TSR-805 datasheet identifies an 8mm type. Both list a 100Ω–1MΩ resistance range and ±20% resistance tolerance, with TK entries at ±25%.
Those shared electrical headings do not establish the same mounting arrangement. Compare the exact style’s footprint and adjustment access, then review its applicable ratings. Use the official TSR-625 product page as a starting point for a model-specific inquiry.
Does 6mm or 8mm specify the complete mounting dimensions?
No. The size description identifies a product category, while the chosen style drawing gives the dimensions needed for installation. Body height, terminal position, hole spacing and access around the adjuster still require individual checks.
For example, the TSR-3318 datasheet includes F and K terminal-style drawings. A part with the same nominal size or resistance should still be compared against its own drawing before it is considered for an existing footprint.
How should you compare TSR-805, TSR-825 and TSR-855?
Read the TSR-805 datasheet, TSR-825 datasheet and TSR-855 datasheet alongside the PCB requirement. Check the chosen style’s terminal geometry, body outline, adjustment direction and any specified cover or shaft configuration.
Use the full model and style reference in your comparison notes. A similar product photo is not evidence of dimensional equivalence or electrical compatibility. Confirm the complete requirement with Suntan before approving a replacement.
What needs confirmation for TSR-105H and TSR-103H?
A TSR-103H drawing appears in the TSR-105H datasheet. Ask Suntan which specification and style apply to a TSR-103H request. The presence of that drawing does not, by itself, establish that TSR-105H electrical ratings also apply to TSR-103H.
What should you include in a selection inquiry?
Send the preferred model and style, nominal resistance, required tolerance, adjustment direction and mounting restrictions. Add the intended circuit conditions, sample quantity and estimated order quantity. For an existing design, attach the current part number, datasheet or PCB drawing.
You can review the TSR-625 model information, browse the official TSR series, or contact Suntan with the complete requirement.
What other questions matter before making a selection?
Does ±20% resistance tolerance mean ±20% adjustment accuracy?
No. Resistance tolerance describes the allowed deviation of the nominal end-to-end resistance. For example, a nominal 10kΩ value at ±20% corresponds to 8–12kΩ. This calculated interval is not a specification for adjustment accuracy, circuit output accuracy or measured matching between individual parts.
Does a matching resistance value guarantee a PCB fit?
No. Confirm the selected style’s body dimensions, terminal spacing, mounting holes and adjustment clearance. Electrical suitability and mechanical fit are separate parts of the review, even when two components have the same nominal resistance.
Can you identify the wiper terminal from a product photo?
Use the circuit symbol and terminal numbering for the selected model and style. A photo alone may not establish the viewing direction or terminal assignment. Check the drawing before connecting the part or evaluating an alternative.
Should the style suffix be included in the parts list?
Yes. Record the complete model and style reference together with resistance and tolerance. This helps keep the requested mounting arrangement and adjustment access identifiable when the requirement is reviewed for samples or purchasing.
For final specification confirmation, discuss the selected model, style and working conditions with Suntan Technology Company Limited.
