Product Introduction
The RB121G-H is a 12mm dual-gang rotary potentiometer with a plastic shaft, horizontal mounting structure, and support bracket. It is designed for compact electronic equipment where two circuits need synchronized rotary adjustment. The dual-section construction allows one shaft to control both channels, while the PCB terminals support direct board assembly. Its compact 12mm body helps reduce installation space in control panels and electronic assemblies. The component is suitable for audio equipment, control interfaces, and other electronic products requiring practical manual adjustment and stable mechanical mounting.
The RB121G-H supports multiple resistance values within the RB12 series. The supplied specification lists a 300° ±10° rotational angle, 20–200 gf·cm rotational torque, and center click position.
The specified rotational life is ≥10,000 cycles. MOQ is 3,000 pieces, with a reference price of US$0.15 per piece. Better pricing is available for larger quantities.
Key Features
1. Compact 12mm Size
The RB121G-H uses a 12mm series design for applications with limited installation space. Its compact body can help reduce the required PCB area compared with larger rotary control components. This makes it suitable for compact audio equipment, electronic control panels, and other space-sensitive assemblies.
2. Dual-Gang Rotary Construction
The dual-gang structure contains two variable resistance sections operated by one shaft. This allows two circuits to be adjusted at the same time. It is particularly useful when synchronized control is needed, such as left and right channels in audio equipment or two related control circuits.
3. Horizontal PCB Mounting
The RB121G-H is designed for horizontal PCB mounting. Its terminals extend from the component body for direct circuit-board assembly. This mounting orientation allows the shaft to remain accessible from the equipment panel while the main body sits horizontally relative to the PCB.
4. Plastic Shaft and Support Bracket
The product uses a plastic shaft with a support bracket structure. The bracket provides an additional mechanical mounting point for the component. The supplied dimensional drawings show the shaft and mounting structure for the RB12 series, allowing engineers to check PCB and panel compatibility before production.
5. Center Click Position
The supplied RB12 series specification lists a center click position and a rotational torque of 20–200 gf·cm. The click provides a tactile reference during adjustment. This can be useful for applications where the center position needs to be located easily during manual operation.
6. 10,000-Cycle Rotational Life
The RB12 series specification lists a rotational life of at least 10,000 cycles. Other mechanical specifications include a total rotational angle of 300° ±10°, click slip-out force of 30–250 gf·cm, and push-and-pull strength of at least 5 kgf·cm.
Technical Specifications
| Parameter | RB121G-H Specification |
|---|---|
| Model | RB121G-H |
| Series | RB12 Series |
| Product Type | Dual-Gang Rotary Potentiometer |
| Size | 12mm |
| Shaft Type | Plastic Shaft |
| Mounting | Horizontal PCB Mount |
| Mechanical Structure | With Support Bracket |
| Gang | Dual-Gang |
| Total Rotational Angle | 300° ±10° |
| Rotational Torque | 20–200 gf·cm |
| Click Position | Center Click |
| Click Slip-Out Force | 30–250 gf·cm |
| Shaft Stop Strength | ≤2.5 kgf·cm |
| Push & Pull Strength | ≥5 kgf·cm |
| Total Resistance Range | 1KΩ < R < 1MΩ ±20%; 1KΩ ≤ R ≥ 1MΩ ±30% |
| Resistance Taper | Refer to series specification |
| Power Rating | ≤0.05W |
| Maximum Operating Voltage | 50V AC / 20V DC |
| Residual Resistance | R1–2 <10Ω; R2–3 <20Ω |
| Rotational Noise | ≤100mV |
| Tracking Error | ≤±3dB at -40 to 0dB |
| Insulation Resistance | 100MΩ min. at 500V DC |
| Withstanding Voltage | 500V AC for 1 minute |
| Rotational Life | ≥10,000 cycles |
| MOQ | 3,000 pcs |
| Reference Unit Price | US$0.15/pc |
| Bulk Pricing | Available for larger quantities |
Customization Options
The RB121G-H is part of the RB12 series, which provides several shaft and mounting configurations. The supplied drawings show different shaft types, shaft lengths, and mounting structures. Engineers can select the suitable configuration according to panel depth, knob requirements, and PCB layout.
For OEM and ODM projects, customers can confirm the required resistance value, resistance taper, shaft length, shaft type, mounting dimensions, and terminal arrangement before production.
The standard product uses a plastic shaft and horizontal mounting structure with a support bracket. If your existing PCB has fixed hole positions, it is recommended to provide the PCB layout or mechanical drawing for engineering confirmation.
For volume orders, technical requirements can be reviewed before mass production.
Applications
The RB121G-H is suitable for electronic equipment requiring dual-channel rotary adjustment and horizontal PCB mounting. Typical applications include stereo audio equipment, audio amplifiers, speaker systems, mixing equipment, electronic instruments, control panels, consumer electronics, home audio systems, PCB control boards, industrial electronic equipment, and compact control devices. The dual-gang structure allows two circuits to be adjusted through one shaft. Its 12mm size is useful for compact designs. The center click provides a tactile reference position. The support bracket adds mechanical stability during PCB installation. For OEM applications, engineers can select suitable resistance values and shaft configurations according to circuit and mechanical requirements.
FAQ
1. What is the RB121G-H?
The RB121G-H is a 12mm dual-gang rotary potentiometer with a plastic shaft, horizontal PCB mounting, and support bracket.
2. Is the RB121G-H a dual-gang model?
Yes. Two resistance sections are operated by one shaft, allowing simultaneous adjustment of two related circuits or channels.
3. What mounting method does it use?
The RB121G-H uses horizontal PCB mounting with a support bracket and fixed PCB terminals for circuit-board assembly.
4. What is the rotational life?
The RB12 series specification lists a rotational life of at least 10,000 cycles under specified test conditions.
5. What is the minimum order quantity?
The standard MOQ for RB121G-H is 3,000 pieces, making it suitable for OEM and volume electronic equipment production.
6. What is the unit price?
The reference price is US$0.15 per piece. Larger order quantities can receive more competitive pricing based on volume.
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