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Huawei ETP4890-B3A2 48V Embedded DC Power System

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Huawei  ETP4890-B3A2 Overview
ETP4890-B3A2 90A AC/DC converter, with 3*30A rectifier module, 1 monitoring module, 8 LOAD, 2 BATT

ETP4890-B3A2 is an embedded 3U telecom power system that supplies power to -48 V DC communications equipment with a maximum current of 90A.

ETP4890-B3A2 has three rectifier slots, supporting a maximum of three R4830G1, or R4830N2 rectifier. One SMU01C is configurated by default. 

The site monitoring unit (SMU) performs communication and alarm reporting, monitorsand controls the power system, monitors the environment, and reports faults in a timelymanner. 

The SMU01C connects to the power and environment over YDN protocol and accessnetwork host over master/slave protocols. Both Rectifiers and the SMU are hot-swappable

ETP4890-B3A2 is primarily used to supply reliable power to communications equipment such as Huawei OLTs, routers, switches, and transmission systems.


Figure 1: ETP4890-B3A2 Model Name Description


Key Features

  • Reliable -48V DC Power Supply – Converts AC input power into stable DC power for telecom equipment, with a maximum output current of 90A.

  • High Power Capacity – Delivers up to 4,815W of output power to support demanding telecom applications.

  • Wide AC Input Voltage Range – Supports 85–300V AC input for flexible deployment in different power environments.

  • Intelligent Monitoring & Alarms – The SMU monitoring unit monitors system operating status and reports faults and alarms in a timely manner.

  • Hot-Swappable Modules – Supports hot-swapping of rectifier modules and the monitoring unit for easier maintenance.

  • Comprehensive Battery Management – Supports battery connection and monitoring to help maintain power continuity during AC power interruptions.

  • High Power Factor – Power factor of up to 0.99 for efficient power utilization.

  • Compact 3U Design – Space-efficient form factor suitable for telecom equipment cabinets.

  • Wide Application Compatibility – Suitable for Huawei OLTs, routers, switches, and optical transmission equipment


Huawei ETP4890-B3A2 Datasheet
Item Specification
Input ~200~240V, 50/60Hz, 30A Max
Output -48V, 90A Max
Input voltage frequency 50 Hz to 60 Hz
Maximum output power (W) 4815
Dimension (mm) 500(W)×370(D)×215(3U,H)
Weight (kg) ≤15 (fully loaded)


Return and Exchange Policy

Thank you for choosing Huatelecom! We value your trust and strive to provide high-quality products and exceptional service. Below is our comprehensive return and exchange policy to ensure your rights are protected.

1. Return Policy

  • Eligibility for Returns (Quality Issues Only):
    If the product has quality defects that affect its normal usage, you are eligible to apply for a return within 7 calendar days of receiving the product. The following conditions must be met:

    1. The product must be unused, with all original packaging, accessories, and manuals intact.
    2. A valid proof of purchase (order number, invoice, etc.) must be provided.
    3. Clear evidence of the defect, such as photos or videos, must be submitted for verification.

  • Shipping Costs for Returns:
    If the return is due to quality issues, Huatelecom will cover the international shipping costs for returning the product.

  • Refund Processing:
    Once the returned product is received and inspected, the refund will be processed within 7 business days. The refund will be issued through the original payment method, and processing times may vary depending on your payment provider.

2. Exchange Policy

  • Eligibility for Exchanges (Quality Issues Only):
    You may request an exchange if the product develops a quality issue within 15 calendar days of receipt. The conditions for eligibility are:

    1. The product must be returned with all original packaging, accessories, and manuals.
    2. Proof of purchase and evidence of the defect must be provided.

  • Shipping Costs for Exchanges:
    Huatelecom will bear the international shipping costs for the exchange.

  • Exchange Process:
    Upon receiving the defective product, we will inspect it and send a replacement product within 7 business days.

3. Warranty Service

  • Coverage During the Warranty Period:
    For products within the warranty period, if quality issues arise, we will provide a replacement free of charge with your next order. No additional shipping costs will be incurred for the replacement.

  • Out-of-Warranty Repairs:
    For products outside the warranty period, repairs can be arranged. However, customers will need to cover theround-trip international shipping costs for sending the product to us and receiving it back after repair.

4. Damages or Loss During Shipping

  • For Customers Who Purchased Shipping Insurance:
    If the product is damaged or lost during shipping, the insurance company will compensate for the loss. Customers must:

    1. Submit a compensation claim within 15 calendar days of the order being shipped.
    2. Provide required documentation, such as photos of the damaged packaging, damaged product, or proof of non-delivery.
    3. Huatelecom will assist in the claim process to ensure timely resolution.

  • For Customers Without Shipping Insurance:
    If you choose not to purchase shipping insurance, Huatelecom will not be liable for any damages or losses incurred during transit.

5. Application Process for Returns, Exchanges, or Claims

  1. For further assistance, please reach out to us:

    • Email: sales@huatelecom.com
    • Phone: +852 44652638
    • Business Hours: Monday to Friday, 9:00 AM - 6:00 PM (GMT+8)
      Provide your order number, issue description, and supporting evidence (photos, videos, etc.).

  2. Request Review:
    Our team will review your application within 1-3 business days and notify you of the outcome.

  3. Return or Exchange Process:

    • If approved, you will receive instructions on how to return the product or proceed with the exchange.
    • For insurance claims, we will assist in coordinating with the insurance company.

  4. Refund or Replacement:
    Once the product is received and inspected, we will process your refund, exchange, or warranty claim promptly.

6. Important Notes

  • Timeframes:

    • Returns must be initiated within 7 days of receipt.
    • Exchanges must be requested within 15 days of receipt.
    • Warranty replacements depend on the warranty terms for the specific product.

  • Condition of Returned Products:
    Products must be returned in their original condition with all accessories and packaging intact. Damaged, altered, or incomplete items may not qualify for returns or exchanges.

  • Shipping Insurance:
    We highly recommend purchasing shipping insurance to protect against potential damages or losses during transit.

  • Non-Eligible Returns/Exchanges:

    • Products with intentional damage or misuse.
    • Issues reported beyond the specified timeframes.
    • Non-Huatelecom products or items purchased from unauthorized channels.

At Huatelecom, your satisfaction is our top priority. Thank you for trusting us with your business!