In industrial control and equipment manufacturing, a reliable pushbutton switch is more than just an on/off device – it’s a critical interface between the operator and the machine.
The SCJ30B Series 30mm Pushbutton Switch is designed for demanding environments, offering IP67 waterproof protection, flexible contact configurations (1NO1NC / 2NO2NC), and a 5A 250V AC rating. Whether you’re building control panels, medical devices, or outdoor equipment, this switch delivers durability and precision.
Below, we break down its key specifications, mechanical design, electrical performance, and typical applications.
1. Key Technical Specifications
Mounting & Mechanical Data
| Parameter | Value |
|---|---|
| Mounting hole diameter | M30 × 1 (30mm thread) |
| Panel cutout size | 30mm round |
| Housing material | SUS304 / Brass nickel-plated / Anodized aluminum alloy |
| Key (button) material | PC & SUS316 (stainless steel) |
| Contact material | Silver tin oxide alloy |
| Contact resistance | ≤ 50 mΩ |
| Actuation pressure | Approximately 2.5 – 4 N |
| Button travel | 3mm (contact stroke: 1.5mm) |
| Operating temperature | -30°C ~ +85°C |
✅ The SUS316 stainless steel button and silver tin oxide contacts ensure long mechanical and electrical life, even in high‑switching applications.
Electrical Ratings
| Parameter | Value |
|---|---|
| Switching voltage | 1.5V ~ 250V AC/DC |
| Resistive load (DC-13) | 5A @ 12V/24V |
| Inductive load (AC-15) | 5A @ 110V/250V |
| Rated heating current (Ith) | 5A @ 250V AC |
| Dielectric strength | >100 MΩ @ 500 VDC/h |
| Withstand voltage (pin to housing) | 2500V AC / 20mA / 1 min |
| Electrical life (DC-13) | >500,000 cycles |
💡 The 5A rating at 250V AC makes this switch suitable for a wide range of industrial loads, including small motors, solenoids, and lighting circuits.
LED & Illumination (Optional)
| Parameter | Value |
|---|---|
| Lamp bead voltage | AC/DC: 3.3V, 6V, 9V, 12V, 24V, 36V, 48V, 110V, 220V |
| Lamp bead current | 2mA ~ 20mA |
| Glowing colors | Red, green, yellow, blue, white (gray / RGB / multi‑color customizable) |
🔦 The wide voltage range (3.3V to 220V AC/DC) allows integration into almost any control system without external voltage conversion.
2. Waterproof Performance – IP67
The SCJ25B series is rated IP67 at the button end, meaning:
| Rating | Protection level |
|---|---|
| IP67 | Dust‑tight + protected against temporary immersion (up to 1m for 30 minutes) |
🔧 For outdoor equipment, marine applications, food processing machinery, or washdown environments, IP67 is the industry standard for reliable operation.
3. Contact Configurations – 1NO1NC / 2NO2NC
The 30mm series supports flexible switch combinations:
| Configuration | Contacts | Typical Use |
|---|---|---|
| 1NO1NC | 1 normally open + 1 normally closed | Basic start/stop control, single‑circuit switching |
| 2NO2NC | 2 normally open + 2 normally closed | Dual‑circuit control, interlocking applications |
Working States (Momentary or Self‑locking)
| Action | NO state | NC state |
|---|---|---|
| Button released | Open | Closed |
| Button pressed | Closed | Open |
⚡ Self‑locking (maintained) and self‑resetting (momentary) options are available to match different operational requirements.
4. Mechanical Design & Dimensions
Key Dimensions (mm)
| Feature | Dimension |
|---|---|
| Mounting thread | M30 × 1 |
| Overall height | 39 ± 0.2 |
| Panel depth (behind panel) | 34 ± 0.2 |
| Terminal width | Tab 4.8 × 0.5 / LED pin 2.8 × 0.5 |
Terminal Style
Quick‑connect tab terminals (4.8mm × 0.5mm for switch, 2.8mm × 0.5mm for LED)
Easy wiring with standard female connectors
📐 The M30 × 1 thread is a standard industrial size, compatible with most panel cutouts and mounting nuts.
5. How This Switch Compares to Alternatives
| Feature | SCJ25B | Typical Economy Switch |
|---|---|---|
| Waterproof rating | IP67 (button end) | IP54 or none |
| Contact configuration | 1NO1NC / 2NO2NC | 1NO only |
| LED voltage range | 3.3V – 220V AC/DC | 6V/12V/24V only |
| Contact material | Silver tin oxide alloy | Silver or copper |
| Electrical life | >500,000 cycles | 50,000 – 100,000 cycles |
| Operating temperature | -30°C ~ +85°C | -10°C ~ +55°C |
💡 The SCJ25B is a premium industrial switch, built for longevity and harsh environments.
6. Typical Applications
Thanks to its IP67 waterproof rating, high current capacity, and flexible contact options, the SCJ25B series is widely used in:
Industrial control panels – machine start/stop, emergency stop
Medical equipment – easy‑to‑clean stainless steel button
Food & beverage machinery – IP67 for washdown
Marine and offshore equipment – corrosion‑resistant materials
Outdoor kiosks & vending machines – weatherproof and vandal‑resistant
Agricultural machinery – dust‑proof and durable
7. Customization Options for Buyers
When requesting a quote or samples, please specify the following:
| Customization | Available Options |
|---|---|
| Contact configuration | 1NO1NC or 2NO2NC |
| LED voltage | 3.3V / 6V / 9V / 12V / 24V / 36V / 48V / 110V / 220V AC/DC |
| LED color | Red / green / yellow / blue / white / RGB / multi‑color |
| Housing material | SUS304 / Brass nickel‑plated / Anodized aluminum |
| Working form | Self‑locking (maintained) / Self‑resetting (momentary) |
| Waterproof rating | IP67 standard (higher optional) |
📦 MOQ for standard configurations is typically low (samples available). Custom LED colors or materials may require minimum order quantities – contact our team for details.
Conclusion
The SCJ25B Series Pushbutton Switch is a robust, versatile solution for industrial and outdoor applications. With IP67 waterproofing, 5A 250V AC rating, and flexible 1NO1NC / 2NO2NC configurations, it meets the demands of control panel builders, equipment OEMs, and maintenance engineers alike.
For bulk orders, custom LED voltages, or IP67 upgrades, contact our sales team for fast sampling and technical support.
