The 4.2mm SMT tactile switch DW-TS-S05520 is a compact top-actuated, 4-terminal surface-mount tact switch with a 2.50 mm height, 0.20 mm travel and 50 mA/12 V DC rating. It is available with 160 ±50 gf or 250 ±50 gf operating force, offers a specified life of 50,000 cycles, and is supplied in tape-and-reel packaging.
Typical applications for compact SMT tactile switches include:
4.2mm SMT tactile switch DW-TS-S05520 is a compact top-actuated surface-mount switch designed for PCB-based user-interface and control applications. The supplied Dragon Well engineering drawing confirms a compact body measuring 4.20 ±0.15 mm × 3.35 ±0.15 mm, with an overall height of 2.50 ±0.10 mm. Its four-terminal SMT construction enables direct surface mounting onto the recommended PCB pad layout.
The switch uses a momentary normally-open contact arrangement. Its circuit diagram shows terminals 1 and 2 forming one side of the switching circuit and terminals 3 and 4 forming the opposite side, with electrical connection established when the actuator is pressed.
Electrical performance of this 4.2mm SMT tactile switch includes a maximum rating of 50 mA at 12 V DC, maximum contact resistance of 50 mΩ, and minimum insulation resistance of 100 MΩ. The actuator travel is specified at 0.20 ±0.10 mm, providing short-stroke tactile operation for compact electronic controls.
Two operating-force configurations are available. Ordering code 01 provides 160 ±50 gf, while code 02 provides 250 ±50 gf. Both versions are specified for an operating life of 50,000 cycles, allowing the required tactile-force level to be selected according to the application.
The construction combines a PPA stem, LCP case, nickel-plated phosphor-bronze cover, silver-clad SUS contact, and silver-plated phosphor-bronze terminals. These material details are directly specified in the Dragon Well drawing.
The 4.2mm SMT tactile switch DW-TS-S05520 is supplied in tape-and-reel packaging, making it suitable for automated SMT production. Compact surface-mount tactile switches are commonly used where PCB space and profile are important, and major switch manufacturers similarly offer small SMT tactile products for electronic user-interface applications.
| 1. General | |||
| Part Number | DW-TS-S05520-XXTR-01 | Product Name | Tact switch |
| Description | Tact switch | Manufacturer | Dragon Well Electronics Co., Ltd |
| RoHS Compliant | Yes | Packaging | TR: Tape Reel |
| Series | 1 | Revision / Date | A-0: 2016.08.03 (NEW) |
| Illuminated | No | Switch Feedback Type | Tactile |
| Switch Connection | SPST, normally open | Operating Function | Momentary |
| 2.Electrical | |||
| Operating Voltage | DC 12V Max. | Rated Current | 50 mA |
| Contact Resistance | 50mΩ Max. | Insulation Resistance | 100MΩ Min. |
| Withstand Voltage | N/A | Life Requirement | 50,000 cycles |
| Contact Current Rating | 50 mA | Switch Contact Plating | Ag CLAD |
| Contact Base Material | SUS | ||
| 3. Physical | |||
| Actuator Force | 160±50 gf; 250±50 gf | Travel Distance | 0.20±0.10 mm |
| Actuator Material | PPA | Actuator Color | N/A |
| Cover Material | Phosphor bronze | Case Material | LCP |
| Case Color | N/A | Base Material | LCP |
| Spring Material | SUS, Ag CLAD | Low Profile | N/A |
| Process Sealed | N/A | ||
| Height (H) Options | 2.50 mm | H Tolerance | ±0.1 |
| Body Length (Top View) | 4.20±0.15 mm | Side Dimension | 3.35±0.15 mm |
| Vertical Dims (Side) | 1.70±0.1 mm; 0.50±0.05 mm; 0.60 mm; 0.05 mm | Mounting Length | 4.50±0.3 mm |
| Actuator Ø | N/A | Thickness (T) | 0.50±0.05 mm |
| Pad Spacing (PCB) | 5.00 × 3.00 mm | Footprint Spacing | 2.40 mm; 1.40 mm |
| Operating Temp Range | N/A | ||
| 4. Solder Process Data | |||
| Termination Method | SMT | Recommended PCB Layout | Top View (Tolerance: ±0.05) |
