The Powerbox PB251A-12CM-H is a high-efficiency, enclosure-mounted battery charger system engineered for industrial-grade reliability. Delivering 13.8VDC at 20A output, this model is equipped with a supplementary heatsink for improved thermal management, making it ideal for demanding applications. Designed with a constant float voltage, current limiting, and an independent battery charging output, the PB251A-12CM-H ensures stable and safe power delivery.

This unit includes advanced features such as DC OK and Battery OK alarms with relay outputs, Low Voltage Disconnect (LVD), and comprehensive protection mechanisms including short circuit and reverse polarity protection. Compatible with DC UPS systems and designed for network monitoring with optional SNMP connectivity, it suits critical environments where performance and reliability are non-negotiable.

What's in the Box

• 1 x Powerbox PB251A-12CM-H Battery Charger

• 1 x IEC Mains Cord with AU Plug

• User Manual

Key Features

• 13.8VDC output with 20A total current

• Enclosure-mounted with additional heatsink

• Compatible with DC UPS systems

• Independent battery charging output

• LVD and overload protection

• Battery condition monitoring with alarms

• Reverse polarity and short circuit protection

• Optional SNMP network enablement and temperature probe

Detailed Specifications

Electrical Input:

• Voltage: 190–264VAC or 225–400VDC

• Frequency: 45–65Hz

• Current: 1.4A max

• Inrush: 10A max

Electrical Output:

• Voltage: 13.8VDC

• Current: 20A (16A load + 4A battery)

• Load Regulation: 0.5% typical

• Ripple: 28mVp-p @100MHz

Protection:

• Over-voltage: 17.5–20V latching

• Auto-resetting short circuit and overload protection

• Internal battery fuse

Environmental:

• Operating Temp: 0–70°C (derating above 25°C)

• Humidity: 5–90% RH, non-condensing

• Natural convection cooling

Mechanical:

• Dimensions: 264(L) x 186(W) x 67(H) mm

• Weight: 2.1kg

• Input Connector: IEC60320 Inlet (cord included)

• Output Connector: 4-way pluggable screw terminal

• Alarm Connector: 6-way pluggable screw terminal

Compliance:

• C-Tick, AS/NZS 60950, AS/NZS CISPR11

• EMC Regulatory Compliance Marked

Brand Overview

Powerbox is a leading supplier of premium-grade power solutions tailored for industrial, telecommunication, and energy systems. With a focus on reliability, innovation, and regulatory compliance, Powerbox products are designed to meet the most stringent operational demands.

SKU: PBXPB251A-12CM-H

Supplier SKU: PB251A-12CM-H

Practical Use Scenarios

• Battery backup systems in telecommunications

• Industrial automation requiring stable DC supply

• Power management in remote installations

• Security and alarm system battery charging

Datasheets & Downloads

• PB251A-12CM-H Technical Datasheet (PDF)

Excellence for the Australian and New Zealand Market

• Fully compliant with AS/NZS 60950 and EMC regulations

• C-Tick certified for electromagnetic compatibility

• Designed and optimized for rugged Australian and New Zealand environments

• Sourced exclusively through authorized Powerbox distributors

• Warranty support handled directly with the manufacturer

FAQs – PBXPB251A-12CM-H

Q1: What is the total power output of the PB251A-12CM-H?
A1: The PBXPB251A-12CM-H delivers a total output power of 275W at 13.8VDC.

Q2: Can the PBXPB251A-12CM-H operate without AC input?
A2: Yes, the charger supports battery operation and indicates AC loss via the DC OK alarm.

Q3: Does the PBXPB251A-12CM-H support battery temperature monitoring?
A3: Yes, optional temperature probes (2.5m or 5m) can be added for enhanced battery charge management.

Q4: Is SNMP network monitoring available on the PBXPB251A-12CM-H?
A4: Yes, network enablement is available as an optional feature for remote monitoring.

Q5: What type of mounting does the PBXPB251A-12CM-H support?
A5: It is designed for enclosure mounting with an optional rack-mount kit available.