TG 65M

TG 65M Ultra-Small Precision Trimmer Potentiometer

Product Overview

The TG 65M is an ultra-small trimmer potentiometer specially designed for internal circuit board applications, ideal for one-time or occasional precision calibration scenarios. It uses a metal-ceramic (Cermet) or carbon film resistor element and comes in two types: single-turn and multi-turn (such as 12-turn or 25-turn worm-gear drive). By driving the brush with a precision screw, it achieves extremely fine resistance adjustments, providing accurate resistance tuning support for various precision circuits.

Technical Principle

The core operating principle of this potentiometer is based on the relative positional change between the resistor element and the brush: the resistor element is made of metal-ceramic or carbon film, offering excellent stability and precision; a precision screw mechanism drives the brush to move microscopically along the resistor surface, thereby altering the effective resistance length connected to the circuit and enabling fine resistance adjustment. For multi-turn models, a worm-gear transmission structure amplifies the screw’s rotation, allowing even smaller brush movements and achieving higher adjustment resolution—up to 0.01% of the total resistance value—fully meeting the stringent demands of precision calibration.

Key Performance Parameters

1. Rated Power: 0.25W~0.5W
2. Resistance Accuracy: ±10% or ±5%
3. Temperature Coefficient (TCR): as low as ±100ppm/°C
4. Resistance Drift Stability: under long-term operation at 85°C, drift ≤ 1%
5. Adjustment Resolution: multi-turn models can achieve precision down to 0.01% of the total resistance value
6. Structure Type: single-turn, multi-turn (12-turn, 25-turn worm-gear drive)
7. Resistor Material: metal-ceramic (Cermet), carbon film

Core Product Advantages

1. Ultra-High Adjustment Precision: Multi-turn models offer adjustment accuracy up to 0.01% of the total resistance value, satisfying the most demanding precision calibration needs within circuit boards and easily achieving precise resistance matching and parameter calibration.
2. Extremely Low Temperature Drift: With a temperature coefficient as low as ±100ppm/°C and resistance drift ≤ 1% under long-term operation at 85°C, the resistance changes minimally with temperature, ensuring stable circuit parameters across varying temperatures without frequent recalibration.
3. Excellent Vibration-Resistant Locking: Its robust structural design prevents resistance values from shifting under vibration or impact, keeping calibrated parameters locked over time and guaranteeing stable device operation.
4. Ultra-Small Size Design: Specifically engineered for internal circuit board use, its compact dimensions take up minimal space, making it suitable for various tight circuit layouts—especially ideal for precision instruments, medical devices, and other applications with strict space requirements.
5. Outstanding Long-Term Stability: With drift ≤ 1% under long-term operation at 85°C, it ensures that precision measurement equipment requires no recalibration for at least 3–5 years, significantly reducing maintenance costs and calibration frequency.

Core Product Value

1. Precise Calibration Capability: Solves circuit precision challenges, effectively compensating for system accuracy deviations caused by fixed resistor tolerances and enhancing overall device performance and measurement accuracy.
2. Extremely Low Temperature Drift and Long-Term Stability: Reduces equipment calibration frequency, lowers operational costs, and extends the stable operating life of devices.
3. Ultra-Small Size Compatible with Compact Circuit Designs: Provides reliable component support for the miniaturization and integration of precision equipment.

Target Customer Groups

Precision instrument manufacturers, medical device developers, telecommunications base station suppliers, and military electronics research institutions—companies whose products often demand exceptionally high circuit precision and stability. The TG 65M’s precision calibration capabilities and stable performance perfectly align with their product R&D and manufacturing needs.

Typical Application Scenarios

1. Zero-Point Calibration of Sensor Amplifier Circuits: Zero-point offsets in sensor output signals directly affect measurement accuracy; using the TG 65M allows precise adjustment of amplifier circuit zero-point parameters, ensuring accurate and reliable sensor data.
2. Precise Fine-Tuning of Switching Power Supply Output Voltage: Switching power supply output voltages may deviate due to component tolerances; this potentiometer enables fine adjustment of feedback circuits, precisely locking the output voltage to meet equipment’s high-precision power supply requirements.
3. Impedance Matching in RF Circuits: RF circuits have extremely strict impedance-matching requirements; even minor impedance deviations can lead to signal loss and increased reflection. The TG 65M’s ultra-high adjustment precision enables accurate impedance matching, improving RF signal transmission efficiency and quality.

Industry Pain Points Addressed

1. Solving Fixed Resistor Tolerance Issues: Tolerances in fixed resistors can compromise overall system accuracy; the TG 65M’s precise fine-tuning compensates for these deviations, ensuring circuit parameters meet design specifications.
2. Avoiding Common Potentiometer Adjustment Errors: Ordinary potentiometers have low adjustment precision and are prone to “over-adjustment” with slight hand tremors, failing to meet precision calibration needs. In contrast, the TG 65M’s ultra-high-resolution fine-tuning provides precise control, completely resolving this calibration challenge.
3. Reducing Equipment Maintenance Costs: Ordinary potentiometers suffer from significant temperature drift and poor stability, requiring frequent recalibration. The TG 65M’s low temperature drift and long-term stability ensure equipment remains calibrated for 3–5 years, dramatically cutting maintenance expenses and calibration frequency.

Common Questions FAQ

Q1: What is the adjustment precision of the TG 65M?
A: Multi-turn models can achieve precision down to 0.01% of the total resistance value, while single-turn models also offer excellent fine-tuning capability, fully meeting the precision calibration needs of circuit boards.
Q2: How stable is this potentiometer’s temperature performance?
A: Its temperature coefficient is as low as ±100ppm/°C, and under long-term operation at 85°C, resistance drift is ≤ 1%, meaning resistance changes minimally with temperature and maintains stable performance across different thermal environments.
Q3: Which industries are suitable for using the TG 65M?
A: It is widely applicable to precision instruments, medical devices, telecommunications base stations, military electronics, and other industries with extremely high demands for circuit precision and stability, providing precise calibration support for various precision circuits.
Q4: How often does equipment need recalibration after using the TG 65M?
A: Under normal usage conditions, it ensures that precision measurement equipment requires no recalibration for at least 3–5 years, significantly reducing maintenance frequency.