Traffic Control Power Supplies: Engineering 24/7 Roadside Reliability
Rugged German-engineered DIN-rail AC/DC power supplies, DC-UPS buffer modules, and surge limiters specifically designed for extreme outdoor roadside traffic cabinets and smart city corridors.
Uncompromised Quality
Made in Germany for Zero Downtime
Engineered to meet strict NEMA TS2 and EN 50121-4 standards. Operating flawlessly from -40°C to +75°C without fan failures.
Uninterruptible Traffic Architecture
Integrated DC-UPS & Wearless Switching
Zero-millisecond switchover buffering, temperature-compensated battery chargers, and arc-free MosFET switches for modern traffic light controllers.
100 % Made in GermanyIn-house Pfinztal manufacturing
MTBF > 1.2M HoursCalculated field durability
NEMA TS2 / EN 50121-4Traffic & rail standard compliance
Engineering Insight & Technical Architecture
Next-Generation Traffic Control Power Supplies: Solving Roadside Infrastructure Challenges
Modern Intelligent Transportation Systems (ITS) demand an unprecedented level of electrical resilience. As municipal traffic cabinets evolve from simple light-switching boxes into high-density computing hubs containing AI edge-vision processors, Vehicle-to-Everything (V2X) roadside units, automatic number plate recognition (ANPR) cameras, and radar speed sensors, the primary point of failure remains the power supply.
Standard commercial off-the-shelf power units rapidly degrade when exposed to harsh outdoor traffic cabinet conditions: solar heat gain exceeding +70°C, extreme night-to-day thermal cycling, severe line voltage sags, salt fog, and lightning-induced switching surges. CAMTEC Traffic Control Power Supplies are purposefully engineered in Germany to eliminate these failure vectors through robust topology design, heavy-duty surge suppression, and fanless convection cooling.
Industrial Extended Temperature Range: Cold start capability from -40°C with nominal continuous output up to +75°C without forced-air cooling.
High Immunity to Electrical Line Noise: Class B EMI suppression with built-in surge protection up to 4kV (EN 61000-4-5) to survive violent grid spikes.
Active PFC & Extended Hold-Up Time: Power factor >0.98 and hold-up time up to 50ms at full load to ride through micro-outages without resetting traffic control PLCs.
Optional Conformal Coating: Protection against moisture condensation, atmospheric pollution, airborne particulates, and corrosive roadside salt spray.
Procurement & Technological Trends in Traffic Control Power Supplies
Global smart city initiatives and next-generation traffic infrastructure upgrades are rapidly transforming the specifications required by municipal transportation authorities and system integrators.
1. Transition to Smart 24V DC Corridors & Microgrids
Legacy traffic signal infrastructure relying on direct 120V/230V AC lines is undergoing a global shift toward standardized 24V DC low-voltage distribution. Modern LED signal heads, radar units, and edge AI hardware run natively on DC. Transitioning to centralized 24V DC DIN-rail power architectures eliminates dangerous AC shock hazards for roadside field technicians, dramatically improves energy efficiency, and simplifies battery buffering backup.
2. Total Cost of Ownership (TCO) Over Purchase Price
System integrators and municipal traffic engineering departments are shifting focus from initial capital expenditure (CapEx) to lifetime operational expenditure (OpEx). Deploying a cheap power supply that fails after 18 months results in expensive maintenance truck rolls, signal downtime liabilities, and manual reset costs exceeding $800 per incident. High-reliability German power supplies with 15+ year operational lifespans deliver vastly lower TCO.
3. AI Vision & V2X Peak Power Reserve Demands
Unlike old static timer-based signal controllers, AI camera vision sensors, thermal analytics, and 5G V2X communication modules require high peak current during initial bootup and complex multi-object compute loads. Future-proof traffic power supplies must feature power boosts up to 150% for several seconds without voltage droops, preventing sensor reboot loops during traffic bursts.
4. Cybersecurity & Remote Telemetry Integration
As traffic cabinets connect to central Smart City Traffic Management Centers (TMC), monitoring power parameters in real time has become essential. Modern power supplies feature analog and digital status signals (Modbus, CAN, dry contacts) to transmit internal temperature, output voltage health, and battery charge status, allowing predictive maintenance dispatch before signal failure occurs.
5. Harsh Environmental Climate Adaptation
Accelerating global climate volatility means traffic equipment must survive ambient surface temperatures exceeding +60°C inside dark metal cabinets under direct sunlight, as well as sub-zero winter blasts down to -40°C. Robust power supplies must utilize high-grade 105°C long-life electrolytic capacitors, solid metal housings, and potting solutions to thrive without active cooling fans that easily clog with dust.
6. Renewable & Solar Hybrid DC Integration
Modern highway and remote junction traffic control installations are increasingly adopting hybrid power feeds, blending municipal grid power with solar PV panels and battery banks (480V DC mini-grids). Power converters must support wide DC input ranges (450–820 VDC) to seamlessly integrate into renewable roadside power backbones.
Product Portfolio
CAMTEC Power Electronics for Traffic Control Systems
Engineered specifically for demanding outdoor infrastructure, railway level crossings, smart intersections, and highway tolling operations.
1-Phase AC/DC · 10 W – 2000 W
Single-Phase Traffic Cabinet Power Supplies
Ultra-compact DIN-rail switch mode power supplies designed for 115V/230V AC municipal grids. Features wide AC input ranges (85-264VAC), power factor correction >0.98, and high efficiency up to 95% to minimize cabinet heat dissipation.
Designed for major highway toll plazas, tunnel illumination hubs, and complex multi-lane signal intersections. Delivers balanced load distribution across all three phases, mitigating phase loss issues and keeping control electronics rock-solid.
Continuous backup power systems for critical intersections. Features zero-millisecond switchover to battery reserve upon grid loss, intelligent temperature-compensated battery charging, and extended battery lifecycle protection.
Prevents nuisance tripping of roadside circuit breakers during cold starts or power restoration. Clamps extreme inrush peaks drawn by multiple power supplies, inductive loads, and signal lamps instantly.
Replaces mechanical switching contactors in traffic light controllers. Zero mechanical contact wear, arcing-free switching, and immune to road vibration, enabling over 100 million maintenance-free switching operations.
Allows direct step-down conversion from municipal DC microgrids or solar storage lines to regulated 24V DC cabinet voltage without intermediate high-loss AC inverters.
Traffic Control Power Supply Comparison & Specification Matrix
Compare performance parameters across CAMTEC product lines to match your roadside cabinet requirements, output load profiles, and environmental conditions.
Technical Parameters for Traffic Control Power Supplies & Auxiliary Modules
Product Series
Input Voltage Range
Nominal Output
Operating Temperature
Surge / EMI Immunity
Key Traffic Infrastructure Application
HSE / HSE UI Series
90–264 VAC / 120–370 VDC
12V, 24V, 48V, 72V DC (up to 1000W)
-40°C to +75°C
EN 61000-6-2 / EN 61000-6-3, 4kV Surge
Intersection Traffic Signal Controllers, Roadside ANPR Cameras
Uninterruptible Power for Traffic PLCs, V2X Roadside Units (RSU)
ESB 101 / ESB 201
115 VAC / 230 VAC (16A / 30A)
Active Inrush Current Clamping
-40°C to +70°C
Clamps Inrush Peak to <12A
Prevents MCB Tripping in Multi-Device Traffic Cabinets
UMS Electronic Relay
12V DC – 48V DC Control
Up to 50A Wearless Solid-State Output
-40°C to +85°C
Arc-Free, Unlimited Cycles
Fast High-Frequency Traffic Signal & Variable Message Sign Switching
Why CAMTEC Power Supplies GmbH
Pro-Power Made in Germany: E-E-A-T Excellence for Critical Infrastructure
When public safety, traffic flow optimization, and municipal uptime depend on continuous electrical power, compromise is not an option. For over 25 years, CAMTEC Power Supplies GmbH has engineered and manufactured industrial power electronics exclusively in Pfinztal near Karlsruhe, Germany.
Unlike companies that outsource assembly overseas, our entire lifecycle—from circuit architecture topology design, thermal simulation, SMT mounting, automated optical inspection (AOI), and individual high-voltage burn-in testing—takes place under one roof in our TÜV-inspected facility. This guarantees absolute quality control, full component traceability, and long-term product availability spanning decades for municipal master contracts.
In-House German FAB: Every product engineered and hand-assembled in Pfinztal, Germany.
Certified Quality Systems: Fully certified to DIN EN ISO 9001:2015, UL, CSA, and CE directives.
100% Individual Load Burn-In: Every power supply undergoes rigorous automatic full-load burn-in testing before shipment to guarantee zero out-of-box failures.
Direct Engineering Consultation: Speak directly to our senior power supply designers for custom modifications, conformal coating options, or application reviews.
Traffic Control Power Supplies: Technical FAQ for Procurement & Systems Engineers
Addressing essential technical questions regarding specification, environmental durability, and operational safety in traffic infrastructure.
Traffic Control Power Supplies are engineered to operate in unconditioned outdoor roadside cabinets subject to thermal extremes (-40°C to +75°C), high relative humidity, intense vibration from passing heavy vehicles, and severe voltage spikes from grid sags or lightning transients. They incorporate extended hold-up times (>40ms), enhanced active power factor correction (PFC >0.98), optional protective conformal coating, and strict electromagnetic compatibility (EMC) compliance with traffic standards such as NEMA TS2 and EN 50121-4.
CAMTEC power supplies are built using premium high-temperature 105°C ultra-long-life electrolytic capacitors, high-efficiency power MOSFETs, and optimized heavy-gauge aluminum chassis heat dissipation structures. This fanless convection design allows full continuous power delivery at high ambient temperatures without requiring dust-prone cooling fans that frequently fail in outdoor environments.
When power is restored to a traffic intersection after a utility blackout, the simultaneous charging of multiple switch-mode power supply input capacitors creates a massive peak inrush current (often exceeding 100 Amperes for several milliseconds). This surge trips upstream Miniature Circuit Breakers (MCBs) or fuses, causing the intersection to remain dark and requiring expensive emergency service truck dispatches. A CAMTEC ESB inrush limiter actively restricts this peak to safe levels (<12A), enabling smooth, reliable cabinet power-up.
Yes. Because our engineering research lab and manufacturing plant share the same facility in Pfinztal, Germany, CAMTEC excels at custom modifications. We can customize DC output voltages (e.g., 12V, 24V, 36V, 48V, 72V, 110V), supply custom connector harnesses, apply acrylic or silicone conformal coatings for harsh environments, adjust firmware set-points, or modify mounting brackets for legacy cabinet retrofits.
A DC-UPS buffer module maintains output voltage for short duration power glitches (from several seconds to minutes) using ultra-capacitors or small maintenance-free batteries with zero-millisecond switchover, keeping sensitive traffic PLCs and AI vision sensors alive. A heavy-duty DC battery charger is designed for long-term continuous backup (hours to days), utilizing intelligent temperature-compensated charging curves to maintain large external battery banks without overcharging during hot summer months.
Traditional mechanical relay contactors in signal controllers suffer from electrical arcing, contact erosion, and contact welding due to constant cycle switching of signal heads, leading to stuck light hazards. CAMTEC UMS solid-state MosFET relays switch purely electronically without moving parts or mechanical contacts, eliminating arcing and providing practically infinite operational switching cycles with zero maintenance.
We provide comprehensive documentation packages including ISO 9001:2015 certificates, UL/CSA test reports, CE compliance declarations, RoHS & REACH environmental declarations, detailed MTBF calculations (MIL-HDBK-217F / Telcordia), 3D STEP mechanical models, and derating curves.
Consult with a German Power Electronics Engineer
Upgrading a traffic corridor or specifying power supplies for next-generation ITS cabinets? Contact our engineering team for technical sizing, samples, and direct quotation.
