Product Overview
The Vertiv (formerly Emerson) NetSure 731 A91 is a highly integrated, high-efficiency 19-inch embedded DC power system designed for mission-critical telecom access networks, 4G/5G base stations, OLT equipment, edge data centers and industrial power scenarios. It adopts a standard rack-mount subrack structure, supports up to 9 high-efficiency rectifier modules, and provides stable -48V DC output with a system capacity up to 650A / 31.5kW.
Equipped with intelligent monitoring, complete protection, and flexible power distribution, this system ensures reliable, energy-saving and maintenance-free operation. It features front access, hot-swap capability, wide voltage input and strong environmental adaptability, making it the preferred embedded power solution for modern communication infrastructure.
Key Features
Standard 19-inch embedded design, easy for rack installation and space saving
Wide AC input range 85–305VAC, 45–65Hz, compatible with global power grids and generator powerVertiv
Supports up to 9 R48-3000e3 / R48-3500e3 rectifier modules, system power 3kW–31.5kW
Peak rectifier efficiency up to 96.3%, high energy saving and low operating cost
Stable adjustable -48V DC output (-43.2V ~ -57.6V), max output current 650A
Hot-swappable rectifier modules, online replacement without system shutdown
Integrated intelligent monitoring (M830B / M530B), supports LCD display, Ethernet, RS232, RS485, USB, SNMP
Complete built-in protection: LVBD, OVP, OCP, SCP, OTP, surge protection
Full front maintenance design, convenient installation, operation and replacement
Wide operating temperature range, suitable for outdoor cabinets and harsh environments
Standard circuit breakers for load and battery, safe and reliable distribution
Certified with CE, UL, ETSI and global telecom standards
Technical Specifications
| Item | Details |
|---|
| Brand | Vertiv / Emerson |
| Model | NetSure 731 A91 |
| System Type | 19-inch embedded subrack |
| AC Input | 85–305VAC, 45–65Hz; 3-phase 4-wire / 5-wireVertiv |
| DC Output | Nominal -48VDC; Adjustable -43.2V ~ -57.6VDC |
| Max System Current | 650A |
| System Power | 3kW ~ 31.5kW |
| Matching Rectifier | R48-3000e3 / R48-3500e3 |
| Rectifier Efficiency | Up to 96.3% |
| Monitoring Unit | M830B / M530B |
| Communication | Ethernet, RS232, RS485, USB, SNMP |
| Protection | LVBD, OVP, OCP, SCP, OTP, Surge |
| Dimensions (W×D×H) | 483 × 400 × 352 mmVertiv |
| Weight | Approx. 24.8kg (without modules); 43kg (with modules)Vertiv |
| Warranty | 12 Months |
| Certifications | CE, UL, ETSI, RoHS |
Applications
4G / 5G mobile base stations and wireless access sites
Telecom OLT and fiber optical access network equipment
Edge data centers and IDC equipment rooms
Microwave transmission and fixed communication systems
Industrial control, automation and critical DC power loads
Outdoor communication cabinets and compact power systems
Street cabinet, basement and narrow-space installation scenarios
Why Choose Us
We are a professional manufacturer and one‑stop solution provider for communication DC power systems, boasting mature R&D strength, large-scale production capacity and flexible service modes. We fully support OEM and OBM cooperation, helping global partners create differentiated power products and brands.
Powerful R&D & Customization Ability
We have a professional technical team with years of experience in the power industry. We can provide personalized customized services covering power configuration, external interfaces, functional parameters, appearance design and logo printing, to satisfy diverse demands from telecom operators, system integrators and equipment manufacturers.
Comprehensive OEM & OBM Services
We offer full‑cycle cooperation support from product design, prototype testing, certification to mass production. With efficient development process and strict quality management, we help you quickly launch products and build exclusive brand advantages.
Large Production Capacity & On-time Delivery
We own standardized production workshops and complete production lines. Relying on a stable supply chain and mature production technology, we maintain sufficient inventory and strong production capacity, ensuring on-time delivery even for bulk orders and long-term cooperative supply.
Strict Multi-level Quality Inspection
All products will pass full-load operation test, high-low temperature aging test, safety performance test and simulated on-site operation test before delivery. We adopt high-quality original components and implement strict quality control standards to guarantee long-term stable operation of products in various harsh environments.
Full Lifecycle Technical & After-sales Support
We establish a complete service system including pre-sales consultation, in-sales technical guidance and after-sales maintenance. Our technical team responds quickly to provide remote debugging, on-site technical guidance, equipment maintenance training and spare parts supply, protecting the stable operation of your power system all the time.
Rich Global Project Experience
Our products have been exported to many countries and regions, widely applied in communication, data center, industrial control, new energy and other fields. With rich global project experience, we can provide targeted power solutions for different regional standards and application scenarios.
We sincerely look forward to establishing long-term stable cooperative partnership with you.
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