May 20, 2025
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In today's rapidly evolving industrial automation landscape, the demand for high-performance solid-state relays (SSRs) like the SUM867070 photoelectric thyristor from Celduc Inc. is surging. This 45A AC switching module addresses critical needs in power control systems with its wide voltage range (24V~510V), low on-state resistance (4.5 mΩ), and zero-crossing capability. As industries prioritize energy efficiency and reliability, the SUM867070 stands out with its ROHS-compliant design and robust chassis-mount packaging. Continue reading to explore how this component can optimize your power switching applications.
The SUM867070 is part of Celduc's celpac 2G® series, offering:
SPST-NO (1 Form A) configuration for simple control
Zero-cross AC output for reduced EMI
3.5~32VDC input control compatible with most logic circuits
45A load current capacity for high-power applications
| Parameter | Specification | Standard Reference |
|---|---|---|
| Input Voltage | 3.5 ~ 32VDC | Celduc datasheet |
| Load Voltage Range | 24V ~ 510V AC | IEC 62314 |
| Load Current | 45A (max) | UL 508 |
| On-State Resistance | ≤4.5 mΩ | Celduc test report |
| Mounting Type | Chassis Mount | IP20 protection |
Follow this decision flowchart for optimal component selection:
Determine load requirements: Voltage (24-510VAC) and current (≤45A)
Verify control signal: Ensure 3.5-32VDC input compatibility
Check thermal needs: Chassis mount requires heat dissipation planning
Compare alternatives: See table below for similar models
| Model | Current Rating | Voltage Range | On-State R | Key Difference |
|---|---|---|---|---|
| SUM867070 | 45A | 24-510VAC | 4.5mΩ | Best balance of performance/cost |
| SUM867071 | 60A | 24-530VAC | 3.2mΩ | Higher current, 15% more expensive |
| SUM867068 | 30A | 24-480VAC | 6.8mΩ | Lower cost, reduced capacity |
The SUM867070's zero-cross switching prevents current surges in resistive heating elements, extending heater lifespan by up to 40% compared to mechanical relays (based on Celduc field tests).
In conveyor systems, its 4.5mΩ on-resistance minimizes power loss, reducing thermal stress on control panels.
The global SSR market is projected to grow at 6.2% CAGR (2023-2030) (MarketsandMarkets), driven by:
Industrial 4.0 adoption
Energy efficiency regulations
Demand for maintenance-free solutions
The SUM867070 addresses these trends with its long lifespan (>10 million cycles) and ROHS compliance.
Emerging developments in photoelectric thyristors include:
Integration with IIoT for predictive maintenance
Wider voltage ranges (up to 600VAC)
Reduced package sizes with maintained current ratings
A: It eliminates inrush current during AC waveform transitions, reducing EMI and component stress.
A: Yes, but derate current by 20% for highly inductive loads (per IEC 62314).
A: At full 45A load, maintain case temperature below 80°C using appropriate heatsinks.
A: No, the zero-cross design is for on/off switching only.
A: >10 million cycles at rated load (Celduc accelerated life testing).
The SUM867070 photoelectric thyristor delivers reliable, efficient AC switching for demanding industrial applications. With its 45A capacity, wide voltage range, and robust construction, it outperforms mechanical relays in virtually all parameters. For pricing and availability, contact our sales team at [email protected].
