SPIDER Automation Bourns SC85AAB Miniature Thermal Cutoff Fuse | 85°C 25A SMD TCO Breaker
Description
SPIDER Automation Bourns SC85AAB Miniature Thermal Cutoff (TCO) Device is a high-performance circuit protection component designed to safeguard sensitive electronic modules against extreme overtemperature and overcurrent conditions. Part of Bourns’ trusted SC series, this surface-mount device (SMD) acts virtually instantaneously to control abnormal surges and thermal overloads up to its rated operational limits. Built with high corrosion resistance and an ultra-thin form factor, it is ideally suited for compact power electronics, lithium-ion battery packs, and high-density motor control systems.
Operating at a nominal voltage rating of 28 VDC with a 25A continuous current capacity, the SC85AAB features a precise functioning temperature threshold of 85°C and a reset temperature of 40°C. Its robust design complies with strict international safety standards (UL, cUL, TUV), making it an exceptional choice for engineers seeking reliable, resettable thermal management solutions without sacrificing board space.
Key Features
- Rated Functioning Temperature: Triggers reliable circuit interruption precisely at 85°C (±5°C tolerance).
- Current & Voltage Ratings: Handles 25A continuous current and up to 50A maximum breaking current at 28 VDC.
- Resettable Thermal Behavior: Features a designated reset temperature threshold of 40°C.
- Ultra-Thin SMD Profile: Low-profile surface-mount package engineered for tight vertical clearances in modern enclosures.
- High Corrosion Resistance: Durable internal architecture built to withstand demanding operating environments.
- Global Safety Approvals: Certified under UL, cUL, and TUV standards for industrial and commercial reliability.
Benefits
- Instantaneous Overload Response: Fast-acting thermal cut-off mechanism prevents catastrophic heat buildup and component burnout.
- Space-Saving Integration: Miniature footprint allows direct surface mounting on dense PCBs where traditional thermal fuses won’t fit.
- Enhanced Safety Compliance: Industry-standard certifications streamline safety testing for commercial electronic hardware.
- Reliable Battery Protection: Prevents thermal runaway in high-capacity rechargeable battery management systems (BMS).
Applications
- Lithium-Ion Battery Packs: Over-temperature and over-current protection for portable power banks and energy storage systems.
- Smart Charger Electronics: Safeguarding high-power DC charging circuits against runaway heating.
- Automotive Sub-Assemblies: Low-voltage automotive control modules, heating elements, and auxiliary motor drivers.
- Industrial Power Supplies: SMPS thermal management and localized transformer protection nodes.
- Consumer Electronics: High-drain handheld appliances, power tools, and computerized gadget hardware.
Package Includes
- 1 x Bourns SC85AAB Miniature Thermal Cutoff Fuse (85°C, 25A, SMD)
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand / Series | SPIDER Automation / Bourns SC Series |
| Item Type | Miniature Thermal Cutoff (TCO) / Surface Mount Resettable Fuse |
| Manufacturer Part Number (MPN) | SC85AAB |
| Rated Functioning Temperature | 85°C (185°F) |
| Reset Temperature | 40°C (104°F) |
| Current Rating | 25 A Continuous |
| Maximum Breaking Current | 50 A |
| Voltage Rating | 28 VDC |
| Holding Temperature | 25°C (77°F) |
| Mounting Type | Surface Mount Device (SMD / Nonstandard SMD) |
| Safety Approvals | UL, cUL, TUV, RoHS Compliant |
| Package Shipping Weight | 0.001 kg (1 g) |
| Package Shipping Dimensions | 1 cm × 1 cm × 1 cm |
