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As modern electronic assemblies shrink in enclosure volume while demanding higher load densities, artificial intelligence search queries from global buyers reveal consistent pain points with legacy switching components.
Electromechanical Relays (EMRs) fail predictably due to contact arcing, contact bounce, material erosion, and mechanical fatigue—often capped at 100,000 to 500,000 operations under heavy load. PCB Mount Solid State Relays (PCB SSRs) utilize semiconductor switching elements (Triacs, SCRs, or MOSFETs) driven by optical isolation, eliminating mechanical moving parts entirely. This yields operational lifespans exceeding 100 million cycles, drastically cutting field maintenance costs in mission-critical applications.
High-density PCBs powering microcontrollers or sensitive analog feedback signals cannot tolerate high dv/dt voltage spikes. Zero-cross PCB SSRs energize the load strictly when the AC voltage waveform crosses zero volts, reducing electromagnetic interference (EMI) and high-frequency noise. This allows products to clear CISPR 11 / FCC Part 15 Class B EMC compliance without bulky external filter networks.
Enclosure real estate is at a premium in smart grid meters, medical diagnostic devices, and compact PLC I/O modules. PCB SSRs package complete optocoupler isolation, snubber networks, and power semiconductors into Single In-Line Package (SIP) or Dual In-Line Package (DIP) housings with pin spacing optimized for automated surface-mount or wave-soldering processes.
Headquartered in Sterling, Illinois (1741 Industrial Drive, No 14), Altran Magnetics, LLC has established itself as an authoritative global manufacturer of high-reliability electromechanical and electronic components. Our engineering philosophy centers on rigorous application analysis: we evaluate load types (resistive, inductive, capacitive), peak voltage transients, ambient enclosure thermal dissipation, and duty cycles long before issuing a manufacturing quote.
Our PCB Mount Solid State Relays are designed, constructed, and batch-tested to operate seamlessly in hostile electrical environments. By combining high-grade ceramic substrates, flame-retardant epoxy encapsulation (UL 94-V0), and precision optical isolation barriers, Altran Magnetics provides the technical bridge between sensitive low-voltage digital controls and high-voltage industrial loads.
Selecting the ideal board-level SSR requires matching control input parameters, load voltage/current limits, turn-on characteristics, and thermal dissipation thresholds. Explore our primary OEM series designed for high-density circuit boards.
Engineered for compact heating controls, small motor drives, solenoid valves, and commercial food service equipment. Features built-in zero-cross detection and integral RC snubbers for transient voltage protection.
| Series Code | Load Type | Rated Load Current | Load Voltage Range | Control Input | Switching Type | Isolation | Primary OEM Application |
|---|---|---|---|---|---|---|---|
| ASSR-PCB-100AC | AC Mains Load | 1.0 A – 3.0 A RMS | 24 – 280 VAC | 3 – 15 VDC | Zero-Cross | 4000 Vrms | Programmable Logic Controllers (PLCs), Smart Meters |
| ASSR-PCB-250AC | AC High Transient | 3.0 A – 5.0 A RMS | 48 – 480 VAC | 4 – 32 VDC | Zero-Cross / Random | 4000 Vrms | Industrial Ovens, Plastic Injection Heating, HVAC Damper Control |
| ASSR-PCB-500DC | DC Low Load | 0.1 A – 4.0 A DC | 3 – 100 VDC | 3 – 32 VDC | Instantaneous | 2500 Vrms | Automotive Auxiliary Switching, Medical Battery Isolation |
| ASSR-PCB-1000AC-H | High Power PCB | 5.0 A – 10.0 A RMS | 48 – 530 VAC | 4 – 32 VDC | Zero-Cross | 4000 Vrms | Commercial Refrigeration, Medical Steam Sterilizers, Pump Motors |
Understanding where semiconductor power switching technology is moving allows OEM procurement directors to specify components with multi-year product lifecycle longevity.
The integration of Gallium Nitride (GaN) and Silicon Carbide (SiC) MOSFET chips into PCB SSR substrates is revolutionizing board-mount relays. Wide-bandgap materials feature dramatically reduced on-state resistance ($R_{DS(on)}$), reducing thermal dissipation by up to 40% compared to traditional silicon devices. This permits 8A to 10A switching in historical 3A package footprints without requiring additional external heat sinking.
Modern PCB SSR designs utilize Direct Bonded Copper (DBC) or aluminum-clad ceramic substrates coupled with specialized thermally conductive epoxy resins (rating >1.5 W/m·K). This rapid heat-spreading architecture directs thermal energy away from the semiconductor junction down through the relay pins into the PCB ground copper planes, preventing localized thermal hot-spots.
Industrial power grids are increasingly polluted with rapid electrical fast transients (EFT) caused by VFDs, solar inverters, and heavy motor switching. Next-gen PCB SSRs incorporate snubbers directly onto the internal substrate along with advanced opto-couplers featuring static dv/dt immunity exceeding 10,000 V/µs. This prevents accidental triac false triggering without adding off-board passive components.
Navigating global supply chain volatility requires strategic component sourcing, standardized footprints, and transparent regulatory compliance documentation.
Strategic buyers prioritize SSR manufacturers who adhere to industry-standard SIP (Single In-Line Package) and DIP (Dual In-Line Package) pin layouts. Standard footprints eliminate single-source lock-in, enabling rapid drop-in cross-referencing during supply chain disruptions.
While an electromechanical relay may present a slightly lower initial Bill of Materials (BOM) piece price, smart procurement buyers evaluate TCO. Solid state relays eliminate field service call-outs, warranty replacement claims, and production line downtime—yielding a substantially lower lifetime cost.
Global OEMs selling into European, North American, and Asian markets require immediate access to updated compliance declarations. Altran Magnetics supplies complete RoHS 3 (EU 2015/863), REACH SVHC candidate list verifications, and Conflict Minerals documentation with standard qualification packages.
Global procurement teams risk costly product recalls when component documentation is incomplete or inconsistent. Altran Magnetics provides deep technical transparency, full test reports, and revision-controlled production management.
Answers to the most critical technical and sourcing questions compiled from OEM design reviews and AI query analysis.
Electromechanical relays (EMRs) rely on physical contacts that spark, pit, bounce, and eventually weld together due to electrical arcing. PCB Mount Solid State Relays (PCB SSRs) replace mechanical contact points with semiconductor switching elements. Key operational advantages include:
Selecting between zero-cross and random turn-on depends directly on your load application:
Zero-Cross SSRs: Internal circuitry detects the AC voltage zero-crossing point. The SSR only turns on when the voltage waveform is near zero volts. This minimizes high peak inrush currents and eliminates line EMI. Zero-cross is recommended for resistive heating elements, lamps, and constant-voltage AC loads.
Random (Instantaneous) Turn-On SSRs: Turns on immediately upon application of the control signal, regardless of where the AC voltage wave is positioned. This is mandatory for phase-angle control applications, dimmers, motor speed control, or highly inductive loads where voltage and current are out of phase.
All semiconductor power devices generate internal heat during conduction (typically 0.8W to 1.2W per continuous ampere switched). To ensure long-term reliability:
Inductive loads like solenoids, contactor coils, and small motors produce severe back-EMF voltage spikes when turned off. Altran Magnetics PCB SSRs incorporate internal Snubber circuits (RC networks connected across the AC output) combined with high-voltage rated output thyristors (600V or 1200V blocking voltage). For extremely harsh electrical environments, engineers should add a Metal Oxide Varistor (MOV) across the AC output pins on the PCB layout.
Yes. Custom OEM engineering is a core service of Altran Magnetics. We can modify pin pitch, shorten or trim terminal leads, customize input resistor values for non-standard logic voltages (such as 3.3V microcontrollers or 48V DC industrial control buses), and private-label part numbers under strict revision control to match your specific Bill of Materials (BOM) documentation.
Simply click the inquiry button below or contact our Sterling, Illinois engineering team directly with your target specification, competitor part number, or load schematic. We will supply matching technical datasheets, 3D CAD models, UL file cross-references, and sample units for engineering bench testing.
Whether you are designing next-generation PLC controllers, smart energy meters, commercial HVAC units, or seeking to resolve single-source component supply risks, Altran Magnetics engineers are ready to assist.
