SAFT LO 40 SX – 3.0V 3.5Ah 2/3 Thin D-Size Lithium-Sulfur Dioxide Battery
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SAFT LO 40 SX 3.0V 3.5Ah Lithium-Sulfur Dioxide Battery is a high-drain 2/3 Thin D-size primary Li-SO₂ spiral cell designed for reliable power in demanding applications. It provides 3.50Ah capacity, 2A recommended continuous current and pulse capability typically up to 5A, with an operating temperature range of approximately -60°C to +70°C. Suitable for military and defense equipment, radiocommunications, automotive telematics, tracking systems and specialized professional electronics.
SAFT LO 40 SX – 3.0V 3.5Ah 2/3 Thin D-Size Lithium-Sulfur Dioxide Battery
Product Specifications
| Battery Chemistry | Lithium-Sulfur Dioxide (Li-SO₂) |
|---|---|
| Battery Type | Non-rechargeable primary lithium battery |
| Cell Construction | Spiral |
| Cell Size | 2/3 Thin D |
| Country of Manufacture | USA |
| Electrolyte | Non-flammable electrolyte |
| Key Advantage | High and stable discharge voltage; high pulse capability; orientation-independent performance; low self-discharge; long storage life; wide operating temperature range |
| Manufacturer | SAFT |
| Maximum Height | 42.29 mm |
| Maximum Outside Diameter | 28.95 mm |
| Maximum Recommended Continuous Current | 2.0 A |
| Model | LO 40 SX |
| Nominal Capacity | 3.5 Ah |
| Nominal Energy | 10.5 Wh |
| Nominal Voltage | 3.0 V |
| Nominal Voltage Under Load | 2.8 V at 120 mA |
| Operating Temperature | -60°C to +70°C |
| Primary Applications | Radiocommunications; military equipment; beacons; emergency location transmitters; professional electronics |
| Product Name | SAFT LO 40 SX Lithium Battery |
| Product Series | SAFT LO/G |
| Product Type | Primary Lithium-Sulfur Dioxide (Li-SO₂) Battery |
| Pulse Capability | Typically up to 5 A |
| Recommended Storage Temperature | +30°C maximum |
| Safety Feature | Built-in safety vent |
| Sealing | Hermetic glass-to-metal sealing |
| Self-Discharge | Less than 3% after 1 year at +20°C |
| Terminal Configuration | Standard cell with radial nickel tabs |
| Transport Classification | Class 9 |
| Typical Weight | 40 g |
| UL Recognition | UL Component Recognition |
SAFT LO 40 SX – 3.0V 3.5Ah 2/3 Thin D-Size Lithium-Sulfur Dioxide Battery
The SAFT LO 40 SX is a high-drain 3.0V primary Lithium-Sulfur Dioxide (Li-SO₂) battery designed for demanding professional, military, communication and automotive applications. It uses a compact 2/3 “Thin” D-size spiral-cell construction and provides a nominal capacity of 3.50Ah, delivering reliable and stable power for equipment requiring long-life primary lithium batteries.
The LO 40 SX has a 3.0V open-circuit voltage and a 2.8V nominal operating voltage under the specified test conditions. It supports a maximum recommended continuous current of 2.0A and typically provides pulse capability of up to 5A, depending on pulse characteristics, temperature, cell history and the application’s minimum acceptable voltage.
Key Features
- Model: SAFT LO 40 SX
- Chemistry: Lithium-Sulfur Dioxide (Li-SO₂)
- Battery type: Primary / non-rechargeable
- Open-circuit voltage: 3.0V
- Nominal operating voltage: 2.8V
- Nominal capacity: 3.50Ah / 3,500mAh
- Cell size: 2/3 “Thin” D
- Construction: Spiral
- Maximum recommended continuous current: 2.0A
- Typical pulse capability: Up to 5A
- Maximum diameter: approximately 28.95mm
- Maximum height: approximately 42.29mm
- Typical weight: approximately 40g
- Operating temperature: approximately -60°C to +70°C
- Low self-discharge: less than 3% after one year at +20°C
- Hermetic glass-to-metal sealing
- Built-in safety vent
- High and stable discharge voltage
- High pulse capability
- Performance independent of cell orientation
High-Drain and Pulse Performance
The LO 40 SX is designed for applications requiring dependable continuous power together with intermittent current pulses. Its 2.0A recommended continuous current and typically up to 5A pulse capability make it suitable for professional electronic equipment with demanding power profiles. Actual pulse performance depends on the application’s discharge conditions and operating environment.
Long Storage and Temperature Performance
The LO 40 SX is designed for long storage before use and has a low self-discharge rate of less than 3% after one year at +20°C. Its operating temperature range of approximately -60°C to +70°C makes it suitable for equipment exposed to challenging environmental conditions.
SAFT’s Li-SO₂ product range is designed for high power and functionality in cold environments, with spiral cells intended for applications involving continuous currents and superimposed pulses.
Typical Applications
The SAFT LO 40 SX is suitable for applications such as:
- Military and defense equipment
- Radiocommunication equipment
- Radio communication systems
- Automotive telematics
- Tracking and location equipment
- Monitoring systems
- Professional electronic equipment
- Industrial electronics
- Emergency and safety equipment
- Specialized electronic systems
SAFT specifically identifies radiocommunications, military applications and automotive telematics among the main applications for the LO 40 SX.
Compact Thin D-Size Construction
The LO 40 SX uses a 2/3 “Thin” D-size spiral-cell design, with a maximum diameter of approximately 28.95mm, maximum height of approximately 42.29mm and typical weight of approximately 40g. This provides a compact form factor while maintaining 3.50Ah capacity and high-drain performance.
The cell incorporates hermetic sealing and a built-in safety vent, while its spiral construction provides the high active-material surface area needed for high-power discharge performance.
Important: The SAFT LO 40 SX is a primary, non-rechargeable lithium battery. Verify the required voltage, current profile, dimensions and terminal configuration before using it as a replacement battery.










