Q: What are the thermal management and electrical protection standards of the Flatpack S 48/1800 HE under harsh environmental and grid conditions?

The module operates across -40°C to +85°C ambient temperature. It delivers 100% full-load output from -40°C to +55°C, above which internal intelligent thermal derating manages safe operation up to +85°C shutdown. Cooling is driven by a variable-speed brushless DC fan with front-to-back airflow. Electrical protection includes surge immunity per IEC 61000-4-5 (2kV DM / 4kV CM), AC overvoltage sustain up to 300 VAC with automatic shutdown, DC short-circuit recovery, output OVP latching, and MTBF exceeding 350,000 hours (Telcordia SR-332).

Question 1

What are the core electrical specifications and input voltage derating characteristics of the Eltek Flatpack S 48/1800 HE (241122.125)?

Accepted Answer

The Eltek Flatpack S 48/1800 HE rectifier delivers a nominal -48V DC output (adjustable from 43.5 to 57.6 VDC) with a maximum power of 1800W and rated current of 37.5A under 185–275 VAC input. It achieves a peak efficiency of >95.5% (HE standard), with PF ≥ 0.99 and THD ≤ 5%. When AC input operates between 100 and 185 VAC, an internal linear derating profile protects the unit while sustaining continuous output (delivering approximately 900W / 18.75A at 100 VAC), ensuring uninterrupted DC operation for telecom loads under degraded grid conditions.

Question 2

Which chassis platforms are compatible with the Flatpack S 48/1800 HE, and how does it handle cabinet depth, expansion, and bus control?

Accepted Answer

Engineered for shallow-depth installations, the module features a 1U profile (41.5mm) and a compact 210mm depth, fitting ETSI 300mm cabinets and 1U/2U Flatpack S power shelves (e.g., 1U 2-slot, 3-slot, or 2U power core). It integrates an optically isolated digital CAN bus for plug-and-play communication with Smartpack S controllers. The unit supports true active N+1 autonomous current sharing (imbalance < ±5%) and single-handed hot-plugging, allowing seamless capacity expansion and field maintenance without system downtime.

Question 3

What are the thermal management and electrical protection standards of the Flatpack S 48/1800 HE under harsh environmental and grid conditions?

Accepted Answer

The module operates across -40°C to +85°C ambient temperature. It delivers 100% full-load output from -40°C to +55°C, above which internal intelligent thermal derating manages safe operation up to +85°C shutdown. Cooling is driven by a variable-speed brushless DC fan with front-to-back airflow. Electrical protection includes surge immunity per IEC 61000-4-5 (2kV DM / 4kV CM), AC overvoltage sustain up to 300 VAC with automatic shutdown, DC short-circuit recovery, output OVP latching, and MTBF exceeding 350,000 hours (Telcordia SR-332).

Key specifications	Value
Rated Output Power	1800W (37.5A @ 48V)
DC Output Voltage	-48VDC (-42V ~ -58V) V DC
AC Input Voltage	100 ~ 250 V AC
Overall System Efficiency	Up to 96.2% (Gold Standard)
Power Conversion Efficiency	≥ 95.5%
Physical Dimensions	41.5 (1U) × 109 × 210 mm
Ingress Protection Rating	IP20 (Indoor Dust & Finger Proof)
Acoustic Noise	≤ 55 dBA (at 25°C ambient load)
Dielectric Withstand Voltage	3000VAC Input to Ground (< 5mA)
Operating Temperature Range	-40°C ~ +85°C

Eltek Flatpack S 48/1800 HE High-Density Shallow Rectifier Module (Part No. 241122.125)

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What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Telecom 4G/5G macro cellular base stations and distributed remote power sites

Enterprise-grade cloud data center mission-critical -48V DC power distribution lineups

Utility power grid dispatch centers and high-voltage substation DC switchgear rooms

Railway transit signaling, automated train control, and communications equipment rooms

Frequently asked questions

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Eltek Flatpack S 48/1800 HE High-Density Shallow Rectifier Module (Part No. 241122.125)

Talk to RICEWIND

Clear support from selection to delivery

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Telecom 4G/5G macro cellular base stations and distributed remote power sites

Enterprise-grade cloud data center mission-critical -48V DC power distribution lineups

Utility power grid dispatch centers and high-voltage substation DC switchgear rooms

Railway transit signaling, automated train control, and communications equipment rooms

Frequently asked questions

What are the core electrical specifications and input voltage derating characteristics of the Eltek Flatpack S 48/1800 HE (241122.125)?

Which chassis platforms are compatible with the Flatpack S 48/1800 HE, and how does it handle cabinet depth, expansion, and bus control?

What are the thermal management and electrical protection standards of the Flatpack S 48/1800 HE under harsh environmental and grid conditions?

Continue exploring

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Eltek CT0S0201 Embedded Telecom DC Power Subrack System (-48V 150A-300A / Flatpack2 & Smartpack)

Eltek Flatpack S 48/1000 HE Ultra-Compact High-Efficiency Rectifier (-48V 1000W 1U)