May 28, 2025
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In today’s rapidly evolving electronics industry, reliable power relays like the SDT-S-109LMR2,000 from TE Connectivity are critical for ensuring stable circuit control in industrial and consumer applications. With its 9V 5A SPST-NO design and robust construction, this plugin relay meets growing demands for energy-efficient switching solutions. This article explores its core parameters, selection criteria, and real-world applications while analyzing market trends. Read on to discover why engineers consistently choose this model for medium-load control systems.
The SDT-S-109LMR2,000 is a general-purpose power relay from TE Connectivity’s Potter & Brumfield Relays series, designed for through-hole mounting in PCB applications. Below are its key specifications sourced from the manufacturer’s datasheet:
| Parameter | Value |
|---|---|
| Coil Voltage | 9VDC |
| Contact Rating | 5A (250VAC/30VDC max) |
| Contact Form | SPST-NO (1 Form A) |
| Coil Current | 16.7 mA |
| Operate/Release Time | 15 ms / 5 ms |
| Operating Temperature | -30°C to 70°C |
| Contact Material | Silver Tin Oxide (AgSnO) |
| Coil Resistance | 540 Ohms |
When choosing the SDT-S-109LMR2,000 relay, consider these factors:
Load Requirements: Ideal for switching ≤5A loads at 250VAC/30VDC. For higher currents, consider the SDT-S-2 series.
Coil Compatibility: Verify your control circuit provides 9VDC (±20% operational range per IEC 61810-1).
Environmental Conditions: Suitable for industrial environments (-30°C to 70°C) but lacks sealed construction.
Lifecycle: AgSnO contacts offer >100,000 operations at rated load (per TE Connectivity testing).
This relay is widely used in:
Industrial Control Panels: Motor starters and solenoid control
HVAC Systems: Compressor and fan switching
Power Supplies: Secondary circuit protection
Automotive Electronics: 12V system controls (with appropriate voltage regulation)
According to a 2023 report by MarketsandMarkets™, the global relay market is projected to grow at 4.8% CAGR, driven by:
Increasing automation in manufacturing
Demand for energy-efficient switching devices
Expansion of IoT-controlled systems
The SDT-S-109LMR2,000’s AgSnO contacts position it favorably against competitors, as this material reduces arc erosion compared to traditional silver alloys.
| Model | Coil Voltage | Current Rating | Key Difference |
|---|---|---|---|
| SDT-S-109LMR2,000 | 9VDC | 5A | Standard industrial version |
| SDT-S-112D3 | 12VDC | 5A | Higher coil voltage |
| RT314024 | 9VDC | 8A | Higher current capacity |
Yes, this relay complies with RoHS Directive 2011/65/EU.
10 million operations minimum (no load) per TE Connectivity specifications.
Yes, rated for 250VAC or 30VDC maximum.
Maintain 2mm clearance between contacts and follow TE’s application note AN-112 for thermal management.
AgSnO offers better environmental compliance and arc resistance, though with slightly higher contact resistance.
With TE Connectivity phasing out this model (marked "Obsolete"), engineers should consider newer alternatives like the RT424 series for future designs, which feature:
Higher switching capacity (10A)
Lower power consumption coils
Enhanced safety certifications
For purchasing inquiries or technical support, contact our team at [email protected].
