Question 1

What are the core electrical specifications and surge suppression capabilities of the Huawei R1MEPF240 (HW-OLT-R1MEPF240-PWR) filter board?

Accepted Answer

The Huawei R1MEPF240 is engineered for SmartAX large-capacity chassis, operating on a nominal -48V/-60V DC input (-38.4V to -72V DC operational range). Equipped with high-current copper terminal lugs, it features a multi-stage LC low-pass filter and heavy-duty Gas Discharge Tube (GDT)/MOV array to suppress EMI and high-frequency input ripple. Designed to meet ITU-T K.20/K.45 central office standards, it provides differential-mode surge protection up to 10kV/5kA and common-mode up to 20kA. As a passive, high-conductivity board, its insertion loss is negligible, maintaining over 99.5% DC bus power efficiency under full load.

Question 2

What is the slot compatibility and dual-feed redundancy mechanism of the R1MEPF240 within SmartAX chassis?

Accepted Answer

The R1MEPF240 is natively designed for Huawei SmartAX MA5600 broadband access platforms and select large-capacity MA5680T OLT chassis, seated in the dedicated DC power input and filter slots. It supports dual-feed A+B independent -48V DC bus inputs with integrated fault isolation. Featuring keyed mechanical alignment, it is fully backward-compatible with legacy MEPF filter variants. The board incorporates reverse-polarity protection and high short-circuit withstand rating, facilitating hitless power failover between feeds to ensure zero packet drop across core control and GPON/EPON line cards during upstream power fluctuations.

Question 3

How does the R1MEPF240 perform under extreme industrial and harsh central-office environmental conditions?

Accepted Answer

The Huawei R1MEPF240 complies with carrier-class ETSI Class 4.1 standards, supporting an extended operating temperature range of -40°C to +70°C and 5% to 95% non-condensing relative humidity. Its fanless, passive design relies on conduction and natural convection cooling inside the chassis frame, eliminating mechanical point-of-failure risks. The PCB features industrial-grade conformal coating (anti-humidity, anti-salt spray, anti-fungus) with NEBS Level 3 and ETSI 300 019-2-3 seismic compliance. Rated UL 94V-0 for flame retardancy, it delivers an MTBF exceeding 500,000 hours in harsh, unconditioned outdoor cabinets.

Key specifications	Value
Board Type	High-capacity direct-current power input filtering and lightning protection board
Port Density & Specs	High-current pure-copper input terminal bar + multi-stage LC filtering and discharge tube array
Supported Chassis	Huawei SmartAX MA5600 / MA5680T large-capacity access chassis
Subscriber Capacity	High-voltage surge suppression, with lightning-current handling capacity meeting the highest rating for telecom equipment rooms
Typical Power Consumption	Fully passive, high-conductivity design with extremely low power consumption W
Operating Temperature	-40°C to +70°C

Huawei R1MEPF240 DC Power Filtering & Surge Protection Board

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Telecom operator central office DC power distribution

Mountainous and coastal high-lightning telecom stations

Industrial mission-critical datacenter chassis

Frequently asked questions

Continue exploring

Huawei 1.25G eSFP 1310nm 10km Enhanced Single-Mode Gigabit Optical Transceiver

Huawei 100G CFP2 1310nm 10km Single-Mode Optical Transceiver Module

Huawei 100G QSFP28 1310nm 10km Single-Mode Optical Transceiver Module (4x25G LR4 Duplex LC)

Huawei 100G QSFP28 850nm 100m Multi-Mode Optical Transceiver Module (SR4 MPO)