The BTA2 is a high-performance relay designed for applications requiring higher switching capacities and enhanced safety features. With contact ratings up to 13A and available in 1 pole, 2 pole, and 3 pole configurations, it is ideal for industrial controls, power distribution, and heavy-duty switching. The relay offers optional magnetic arc extinguishing, a manual test button, LED status indication, and complies with RoHS and REACH environmental standards.
Key Features:
- High Contact Capacity:1C:13A, 2C:12A, 3C:11A
- Contact Forms:1C (SDPDT), 2C (DPDT), 3C (3PDT)
- Optional Magnetic Arc Extinguishing:Available for 2C DC models only
- LED Indicator:Shows coil ON/OFF status (AC: red, DC: green)
- Manual Test Button:For circuit testing and operation verification
- Environmental Compliance:RoHS and REACH
- Multiple Shell & Terminal Options:Various housing styles and terminal sizes
- Wide Coil Voltage Range:6–110VDC, 6–240VAC
Model Description:
| Code | Description |
| BTA2 | Base Model |
| 1C / 2C / 3C | Contact Form (1C=SDPDT, 2C=DPDT, 3C=3PDT) |
| (Blank) | Contact Load: 1C:13A, 2C:12A, 3C:11A |
| S1 / S2 / P2 / P3 | Terminal Type (S1:4.8×0.8mm, S2:4.8×0.5mm, P2:1.2×0.8mm, P3:1.2×0.5mm) |
| C / C1 / C3 / C4 | Shell Type (C=Standard, C1=Side Flange, C3=Top Flange, C4=Clamp Rail) |
| M | Manual Test Button (Optional) |
| L | LED Indicator (AC=Red, DC=Green) |
| B | Magnetic Arc Extinguishing Device (for 2C DC only) |
Coil Specifications (at 23°C):
| Rated Voltage | Coil Resistance (Ω) – 1C/2C | Coil Resistance (Ω) – 3C |
| 6VDC | 32Ω | 32Ω |
| 12VDC | 120Ω | 120Ω |
| 24VDC | 472Ω | 472Ω |
| 48VDC | See manufacturer’s data | See manufacturer’s data |
| 110VDC | 10000Ω | 10000Ω |
| 6VAC | 4.2Ω | 6Ω |
| 12VAC | 18Ω | 21Ω |
| 24VAC | 72Ω | 85Ω |
| 48VAC | 280Ω | 350Ω |
| 110VAC | 1500Ω | 1900Ω |
| 120VAC | 1700Ω | 2250Ω |
| 220/230VAC | 6000Ω | 7200Ω |
| 240VAC | 9110Ω | 7200Ω (estimated) |
Note: Maximum withstand voltage = 110% of rated voltage for short periods.
Contact Specifications:
| Parameter | 1C | 2C | 3C |
| Resistive Load | 13A @ 28VDC/240VAC | 12A @ 28VDC/240VAC; 13A @ 120VAC | 11A @ 28VDC/240VAC; 13A @ 120VAC |
| Motor Load | 1/3 HP @ 120VAC; 1/2 HP @ 240VAC | Same as 1C | Same as 1C |
| Switching Power | 364W / 3120VA | 364W / 2880VA | 308W / 2640VA |
| Contact Material | AgSnO₂ Alloy | AgSnO₂ Alloy | AgSnO₂ Alloy |
| Initial Contact Resistance | ≤50mΩ | ≤50mΩ | ≤50mΩ |
| Electrical Life | 100,000 operations | 100,000 operations | 100,000 operations |
| Mechanical Life | 10,000,000 operations | 10,000,000 operations | 10,000,000 operations |
General Electrical & Mechanical Parameters:
| Parameter | Value |
| Pickup Voltage (23°C) | DC: ≤80%, AC: ≤85% of rated voltage |
| Release Voltage (23°C) | DC: ≥10%, AC: ≥30% of rated voltage |
| Max. Voltage | 110% of rated voltage |
| Coil Power | DC: 1.2W, AC: 2.0–3.0VA |
| Pickup Time | AC: ≤30ms, DC: ≤20ms |
| Release Time | AC: ≤25ms, DC: ≤15ms |
| Insulation Resistance | 1000MΩ @ 500VDC |
Dielectric Strength (1 min):
| Withstand Voltage Test | Value |
| Between Same Pole Contacts | 1000VAC |
| Between Opposite Pole Contacts | 1500VAC |
| Between Coil and Contact | 1500VAC |
Environmental & Mechanical Specifications:
| Parameter | Value |
| Operating Temperature | –30°C to +65°C (no ice or frost) |
| Humidity | 5% to 85% RH |
| Atmospheric Pressure | 86–106 kPa |
| Vibration Resistance | 10–55Hz, 1.0mm double amplitude |
| Impact Stability | 98 m/s² |
| Impact Strength | 980 m/s² |
Physical Specifications:
| Parameter | 1C | 2C | 3C |
| Dimensions (L × W × H) | 35mm × 35mm × 53mm | 35mm × 35mm × 53mm | 35mm × 35mm × 53mm |
| Weight | Approx. 88g | Approx. 90g | Approx. 92g |
| Terminal Types | Plug-in or PCB (depending on model) | Plug-in or PCB | Plug-in or PCB |
