PANASONIC SG-B1 — Safety Door Switches
Panasonic SG-B1: ultra-slim safety door switch with solenoid interlock, interlock force ≥500 N, 5 contacts, spring or magnet lock, IP67.
Status: In production
Brand: Panasonic
Product: Ultra-slim safety door switch with solenoid interlock
Interlock force: min. 500 N (GS-ET-19)
Contacts: main 1NC + 1NC, door monitor 2NC, lock monitor 1NC or 1NO
Lock type: spring lock (-S) or magnet lock (-M)
Solenoid: 24 V DC, 100 % duty cycle, 110 mA
Degree of protection: IP67 (IEC 60529)
The Panasonic SG-B1 is an ultra-slim safety door switch with solenoid interlock; the manufacturer states it is among the world’s thinnest class based on its own research as of May 2025. It has five built-in contacts: main circuit 1NC + 1NC, door monitor 2NC and lock monitor 1NC (-A) or 1NO (-B). Interlock force is min. 500 N. Two lock types are offered: spring lock (-S) and magnet lock (-M). The magnet lock type locks when energized and unlocks when de-energized. Cables are pre-installed at the factory, and the angled cable exit saves space.
It conforms to EN 60947-5-1 and GS-ET-19 and is intended for use with ISO 14119 and IEC 60204-1. Direct opening travel is min. 8 mm and force min. 60 N. The solenoid is 24 V DC, 100 % duty cycle, drawing 110 mA (solenoid 100 mA, LED 10 mA), with a green LED indicator. Mechanical durability is min. 1,000,000 operations and B10d is 2,000,000. The enclosure is PA66, protection IP67 and operating temperature -25 to +50 °C. The manufacturer states that the magnet lock type must not be used in applications where locking is strictly required for safety.
Panasonic SG-B1 technical specifications
| General | |
|---|---|
| Applicable standards | EN 60947-5-1:2017, GS-ET-19:2019 |
| Standards for use | IEC 60204-1 / EN 60204-1, ISO 14119, EN ISO 14119, IEC 60947-5-1, UL 508, CSA C22.2 No.14 |
| Regulations | CE (Machinery Directive 2006/42/EC, RoHS), UKCA |
| Safety ratings | |
| Interlock force | min. 500 N (GS-ET-19) |
| Direct opening travel / force | min. 8 mm / min. 60 N |
| B10d | 2,000,000 (ISO 13849-1 Annex C Table C.1) |
| Electric shock protection class | Class II (IEC 61140), double insulated |
| Electrical characteristics | |
| Rated insulation voltage (Ui) | 300 V (door monitor), 150 V (main and lock monitor), 30 V (LED, solenoid) |
| Impulse withstand voltage (Uimp) | 2.5 kV (door monitor), 1.5 kV (main and lock monitor), 0.5 kV (LED, solenoid) |
| Thermal current (Ith) | -25 to +35 °C: 2.5 A (up to 2 circuits), 1.0 A (3 or more circuits); 35 to 50 °C: 1.0 A (1 circuit), 0.5 A (2 or more circuits) |
| Rated operational current, main and lock monitor | AC-12: 2 A / 125 V; AC-15: 1 A / 125 V; DC-12: 2 A / 30 V, 0.4 A / 125 V; DC-13: 1 A / 30 V, 0.22 A / 125 V |
| Rated operational current, door monitor | AC-12: 2.5 A / 125 V, 1.5 A / 250 V; AC-15: 1.5 A / 125 V, 0.75 A / 250 V; DC-12: 2.5 A / 30 V; DC-13: 2.3 A / 30 V |
| Solenoid / indicator | 24 V DC, 100 % duty cycle, 110 mA (solenoid 100 mA, LED 10 mA), green LED |
| Mechanical durability | min. 1,000,000 operations (GS-ET-19) |
| Electrical durability | min. 100,000 operations (AC-12 125 V 2 A, DC-12 125 V 0.4 A); min. 1,000,000 operations (24 V AC/DC 0.1 A) |
| Environmental | |
| Degree of protection | IP67 (IEC 60529) |
| Operating temperature | -25 to +50 °C (no condensation or icing) |
| Storage temperature | -40 to +80 °C |
| Ambient humidity | 45–85 % RH |
| Shock resistance | malfunction 100 m/s², destruction 1,000 m/s² |
| Mechanical and connection | |
| Actuator operating speed | 0.05–1.0 m/s |
| Operating frequency | 900 operations per hour |
| Enclosure material | PA66 |
| Cable | UL style 2464, No.22 AWG 12-core |
| Weight | SG-B1-□-G1 approx. 220 g, SG-B1-□-G5 approx. 600 g |
Panasonic SG-B1 models
| Model | Lock type | Main contacts | Door monitor | Lock monitor | 1 m / 5 m cable code |
|---|---|---|---|---|---|
| SG-B1-SA | spring lock | 1NC + 1NC | 2NC | 1NC | SG-B1-SA-G1 / SG-B1-SA-G5 |
| SG-B1-SB | spring lock | 1NC + 1NC | 2NC | 1NO | SG-B1-SB-G1 / SG-B1-SB-G5 |
| SG-B1-MA | magnet lock | 1NC + 1NC | 2NC | 1NC | SG-B1-MA-G1 / SG-B1-MA-G5 |
| SG-B1-MB | magnet lock | 1NC + 1NC | 2NC | 1NO | SG-B1-MB-G1 / SG-B1-MB-G5 |
Key features
- Ultra-slim solenoid interlock body with five built-in contacts
- Space-saving angled cable exit
- Cable pre-installed at the factory; less wiring work
- Choice of spring lock or magnet lock
- Easy-to-see LED operation indicator
- Interlock force min. 500 N, IP67 protection
SG-B1 ordering codes
| Part number | Description |
|---|---|
| SG-B1-SA-G1 | spring lock, lock monitor 1NC, 1 m cable |
| SG-B1-SA-G5 | spring lock, lock monitor 1NC, 5 m cable |
| SG-B1-SB-G1 | spring lock, lock monitor 1NO, 1 m cable |
| SG-B1-SB-G5 | spring lock, lock monitor 1NO, 5 m cable |
| SG-B1-MA-G1 | magnet lock, lock monitor 1NC, 1 m cable |
| SG-B1-MA-G5 | magnet lock, lock monitor 1NC, 5 m cable |
| SG-B1-MB-G1 | magnet lock, lock monitor 1NO, 1 m cable |
| SG-B1-MB-G5 | magnet lock, lock monitor 1NO, 5 m cable |
SG-B1 accessories
Accessories listed by the manufacturer for this product (ordered separately):
| Part number | Description |
|---|---|
| SG-K11 | straight actuator |
| SG-K12 | right-angle actuator (tensile strength 100 N) |
| SG-K12A | right-angle actuator with plate |
| SG-K13 | horizontal/vertical angle adjustable actuator (0–20°) |
| SG-K14 | horizontal/vertical angle adjustable actuator, metal tip reversed 180° |
Other Panasonic Safety Door Switches
- PANASONIC SG-A1 — Ultra-slim safety door switch with actuator
Models from other brands: Safety Door Switches
Is this safety switch right for your application?
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All product specifications are subject to change without notice. Validation of the safety function and the risk assessment remain the responsibility of the machine builder. Source: Panasonic Industry, https://industry.panasonic.com/global/en/products/fasys/sensor/safety/sg-b1, https://industry.panasonic.com/global/en/products/fasys/sensor/safety/number/sg-b1-sa-g1, https://industry.panasonic.com/global/en/products/fasys/sensor/safety/number/sg-b1-sb-g1, https://industry.panasonic.com/global/en/products/fasys/sensor/safety/number/sg-b1-ma-g1, https://industry.panasonic.com/global/en/products/fasys/sensor/safety/number/sg-b1-mb-g1 (accessed 25 September 2026).