Smart BLE
TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A 85-265V EasyCon App Remote Control DIN Rail
40A / 63A
85-265V AC
28 Timings
Catalog Direct Delivery
High-Performance Isolating, Switching & Automation Matrix
Explore our export-grade portfolio manufactured directly at our Liushi production facility. Engineered with flame-retardant V0 enclosures, reinforced silver-alloy contacts, and strict compliance with EU low-voltage directives.
7-Day Digital
TOMZN New Type DIN Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay Timer 16A
16A Relay
12V/24V/230V
LCD Display
Heavy Load
TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail Wall-mounted Timing Countdown Loop 40A
40A Breaking
35mm Rail
App Pairing
1NO + 1NC
TOMZN 1NO 1NC DIN Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay Timer 16A
Changeover
Microcontroller
Weekly Sync
Wall / DIN
TOMZN Bluetooth Smart Timer Switch 85-265VAC 10A 30A EasyCon Wall-mounted Countdown Loop
10A / 30A
Surface Mount
Cyclic Pulse
10-in-1 Relay
TORT7 Series Delay-ON Delay-OFF 10in1 Asymmetric Cycler Time Relay Multi-function Switch 0.1S-10D
Multi-voltage
0.1s - 10 Days
Asymmetric
Solar DC 1000V
TOMZN 2P DC 1000V High-Voltage Miniature Isolating Circuit Breaker 16A-63A Photovoltaic Disconnect
1000V DC
IEC 60947-3
Non-Polarized
IP65 Enclosed
TOMZN IP65 Pre-Wired Outdoor Solar PV Isolator Combiner Box with Surge Arrester & DC Disconnector
IP65 Waterproof
UV Protected
Type II SPD
24+
Years Engineering Excellence
5,700m²
TÜV Audited Floorspace
92
Technical Skilled Personnel
$3.3M+
Verified Annual Export Volume
100%
Dielectric & Thermal Tested
Engineering Whitepaper Analysis
German Low-Voltage Norms: Arc Quenching, Clearance & Disconnection Reliability
In the German market, electrical disconnect switches are governed by strict safety principles outlined in DIN EN 60947-3 (VDE 0660-107). Meeting the standards of German industrial panels (Schaltschränke) and modern PV installations requires engineering integrity far exceeding generic standards.
Zero-Crossing Arc Quenching in DC Disconnectors
Alternating current (AC) naturally crosses zero voltage 100 times per second (at 50 Hz in Germany), providing natural extinguishing conditions for electrical arcs. Direct current (DC), ubiquitous in solar strings and EV battery banks, maintains continuous potential without zero crossings.
Our DC isolators employ multi-plate de-ionizing arc chutes (Löschkammern) combined with high-grade permanent magnetic blowouts. When contacts separate, magnetic forces instantly drive the high-voltage plasma arc into copper deion grids, stretching, cooling, and snuffing out 1000V DC arcs under 4 milliseconds.
- Non-polarized bidirectional internal arc splitting
- Silver alloy (AgSnO2) contacts preventing contact welding
- Extended creepage and clearance distances (>8.0mm)
DIN VDE 0100-712 Galvanic Separation Criteria
Under Germany's installation guidelines for solar photovoltaic systems (DIN VDE 0100-712), safety technicians must have a physically locked, unequivocal point of physical air isolation before servicing grid-tied inverters or battery storage assemblies.
Our isolating switches feature a knife-action double-break mechanism with visible positive contact indication (mechanically linked, not reliant on handle friction). The padlockable rotary actuators and DIN handles allow complete Lockout-Tagout (LOTO) protocols compliant with German employers' liability insurance association (BG ETEM) directives.
- Clear visual flag: Red (Closed) / Green (Isolated)
- Three-position padlockable handle in OFF position
- Impulse withstand voltage (Uimp) certified up to 8 kV
Thermal Equilibrium & V0 Polycarbonate Stability
Enclosed distribution units installed in outdoor German environments face severe seasonal differentials (-25°C in Bavarian winters to >45°C ambient within sealed enclosures under mid-day summer solar radiation).
Our enclosures and isolator switch casings are injection molded from premium self-extinguishing polycarbonates rated UL 94 V-0 and glow wire tested (GWFI) at 960°C per DIN EN 60695-2-12. Terminals are cold-stamped with high-conductivity electrolytic copper with anti-corrosion tin-plating, ensuring low contact resistance (<0.15 mΩ) to prevent localized overheating under full rated current.
- Low thermal dissipation reduces internal cabinet heating
- UV-stabilized outdoor casing (IK08 impact / IP65 waterproof)
- Torque-tolerant tunnel clamps up to 3.5 Nm
Field Deployments
Localized Applications Across German Industrial & Energy Infrastructure
German contractors, distributors, and switchgear manufacturers demand components that fit seamlessly into modular DIN-rail enclosures (Hutschienen-Montage) conforming to standard 35mm DIN EN 60715 specifications.
Balkonkraftwerk & Rooftop Solar (Photovoltaikanlagen)
With millions of micro-PV balcony setups and residential PV installations flourishing across Germany, our miniature DC isolators and pre-wired combiner assemblies serve as the primary rapid-disconnection failsafe between rooftop strings and micro-inverters.
EV Charging Infrastructure (Wallbox-Installationen)
Under KfW funding guidelines and VDE-AR-N 4100 technical connection requirements, EV charging stations require dedicated upstream isolation, overvoltage protection, and timing switches for off-peak smart grid charging.
Industrial Automation & Schaltanlagenbau
Control engineers in Baden-Württemberg and North Rhine-Westphalia integrate our multi-function cycler relays (TORT7) and 63A disconnectors into machine safety circuits, ensuring rapid emergency stop and galvanic maintenance isolation.
Commercial Heat Pump Management (Wärmepumpen)
German grid operators (Netzbetreiber) enforce Section 14a of the Energy Industry Act (EnWG) to throttle interruptible loads. Our digital timer switches and contactors automate utility ripple control signals and heat pump tariff schedules.
Agricultural Automation & Biogas Switching
Moisture-resistant IP65 enclosed switchgear designed for agricultural enterprises in Lower Saxony and Bavaria. Ensures reliable load-break isolation for ventilation motors, manure scrapers, and biomass conveyor feeds.
Battery Energy Storage Systems (BESS)
Commercial lithium battery installations need high-rated DC MCCBs and disconnectors capable of interrupting severe DC prospective fault currents before thermal runaway conditions can develop in the DC busbar system.
Strategic Market Outlook
Emerging Trends Shaping German Electrical Procurement (2025–2030)
Analyzing key structural shifts across German energy policy, building codes, and international supply-chain optimization.
EnWG §14a Smart Meter Gateway Transition
German energy networks are transitioning to mandatory remote controllability for consumers over 4.2 kW (EV chargers, heat pumps, battery storage). Demand is surging for DIN-rail modular switches, contactors, and digital timers with external dry contact inputs capable of communicating with Smart Meter Gateways (SMGWs) to execute automated demand response cycles.
Decentralized Commercial Solar & Battery Mandates
With multiple German federal states (Bundesländer) enacting statutory solar roof mandates (Solarpflicht) for commercial and new residential construction, OEM panel builders are moving toward standardized, pre-wired, CE-marked combiner boxes containing pre-matched DC disconnectors, Class II surge protection, and string monitoring.
Direct-from-Factory Tier-1 Supply Chains
German electrical wholesalers (Elektrogroßhandel) and engineering EPCs are seeking direct partnerships with verified Asian manufacturers to bypass intermediary branding markups. Crucial prerequisites include certified ISO 9001 quality infrastructure, complete transparent compliance documentation, and flexible private-label customization.
Factory Direct Manufacturing
Zhejiang TMB Electric: Liushi Engineering with European Quality Benchmarks
Combining the world's most concentrated low-voltage manufacturing supply chain with systematic testing verified on-site by TÜV Rheinland.
24 Years of Precision Assembly & Component Traceability
Operating from Huabei Village in Liushi Town—globally recognized as the capital of low-voltage electrical equipment—Zhejiang TMB Electric Co., Ltd. controls the end-to-end manufacturing cycle. By managing internal stamping, molding, calibration, and dielectric testing, we guarantee batch-to-batch consistency for our European partners.
Every single batch of isolator switches, digital relays, and circuit breakers undergoes standard 100% dielectric withstand tests at 2,500V AC, contact resistance verification, and automated mechanical trip calibration prior to packaging. OEM laser etching, customized German-language packaging, and modular terminal blocks are fully supported.
| Electrical Parameter | Residential Solar Isolator | Industrial Main Load Break Switch | Electronic Timer / Contactor Switch |
|---|---|---|---|
| Standard Conformity | DIN EN 60947-3 / VDE 0660-107 | IEC/EN 60947-1 / EN 60204-1 | DIN EN 60669-2-1 / DIN EN 61095 |
| Rated Operational Voltage (Ue) | 500V – 1000V DC | 400V / 690V AC (50/60 Hz) | 12V – 240V AC/DC |
| Rated Operational Current (Ie) | 16A, 25A, 32A, 63A | 63A, 100A, 125A | 16A, 32A, 40A, 63A |
| Utilization Category | DC-PV1 / DC-PV2 / DC-21B | AC-21A / AC-22A / AC-23A | AC-1 / AC-7a (Resistive / Lighting) |
| Dielectric Withstand Test | 3,500V AC (1 min) | 3,000V AC (1 min) | 2,500V AC (1 min) |
| Enclosure Protection Class | IP20 (DIN Rail) / IP65 (Enclosed) | IP20 / IP66 Rotary Actuator | IP20 Finger-safe (VBG4 / BGV A3) |
| Flammability Rating | UL 94 V-0 (Self-extinguishing) | UL 94 V-0 Glow-wire 960°C | UL 94 V-0 Flame-retardant PA66 |
Direct Answers
German Electrical Procurement: Technical & Commercial FAQ
Addressing the core technical, regulatory, and logistics questions submitted by German Einkaufsleiter (Procurement Managers) and electrical engineers.
Do your isolator switches comply with German CE and RoHS/REACH regulations?
Yes. All low-voltage switches and circuit components exported to the European Union strictly fulfill the European Low Voltage Directive (LVD 2014/35/EU) and Electromagnetic Compatibility Directive (EMC 2014/30/EU), bearing legitimate CE marking. Furthermore, our raw materials conform to EU RoHS 2.0 (2011/65/EU) and REACH (EC 1907/2006) chemical environmental restrictions.
Why is standard AC switchgear dangerous when used in DC PV string circuits?
AC current has natural sinusoidal zero-crossings where voltage drops to zero twice per cycle, quenching arcs naturally. Direct current generated by photovoltaic strings maintains continuous potential. An AC-rated switch attempting to break 600V–1000V DC cannot extinguish the resulting continuous plasma arc, causing terminal melting, switch fires, or explosive destruction. Only purpose-built DC-PV isolators should be specified.
What is your sample policy and Minimum Order Quantity (MOQ) for German buyers?
To support German panel builders and distributors in conducting bench tests and certification validations, standard catalog items feature low initial MOQs starting from 5 pieces (with selected smart timers available from 1 piece). For customized OEM runs (custom laser branding, tailored amperages, or dedicated German packaging), volume thresholds start from 200–500 units depending on the model.
How does your factory ensure contact reliability and avoid overheating?
We utilize high-grade silver tin oxide (AgSnO2) sintered contacts rather than inexpensive silver-plated copper. AgSnO2 provides exceptional resistance against material transfer and anti-welding under severe short-circuit stresses. Combined with high-pressure stainless steel springs, our terminal blocks maintain constant clamping torque preventing resistance climb over years of continuous load.
Can you supply full DDP (Delivered Duty Paid) shipping to German warehouses?
Yes. We regularly supply German B2B clients under EXW, FOB Ningbo/Shanghai, CIF Hamburg/Bremerhaven, and full DDP arrangements directly to your logistics hubs in Frankfurt, Munich, Stuttgart, or Hamburg. Air express courier services (DHL/FedEx) are utilized for rapid engineering pre-production samples.
Can we request factory audit documentation from TÜV Rheinland?
Certainly. Zhejiang TMB Electric Co., Ltd. has undergone on-site physical auditing by TÜV Rheinland. We provide complete third-party inspection reports, corporate registration certificates, factory walkthrough footage, and declaration of conformity dossiers upon request to verified enterprise procurement teams.