AC/DC Power Supplies

Powerbox PBB3S Series AC/DC Power Supply

The Powerbox PBB3S is a series of enclosed AC/DC power supplies with 12Vdc and 24Vdc outputs from 50W to 150W, built for security and access control, telecommunications and industrial automation systems. Every model accepts universal AC input of 100 to 240Vac nominal (85 to 264Vac range) with no power derating across that input range. The Powerb...

The Powerbox PBB3S range has four models: PBB3S-24-2 (24V, 2.1A, 50W), PBB3S-24-4 (24V, 4.17A, 100W), PBB3S-12-8 (12V, 8.33A, 100W) and PBB3S-12-12 (12V, 12.5A, 150W). Natural convection cooling means there is no fan to wear out or replace, and the lightweight, corrosion resistant aluminium enclosure suits equipment cabinets and communications racks. Choose the 24V models for automation and telecommunications loads, or the 12V models for security panels, door hardware and CCTV.

Each unit is an industrial-grade switching power converter designed for high reliability and high efficiency. Protection is built in, covering output overcurrent and short circuit, output overvoltage and overtemperature conditions. A green Mains/DC OK LED gives a quick visual check of supply status during commissioning and routine maintenance. AC input connects through an IEC C14 inlet, and the operating temperature range is -10°C to 70°C.

As a Powerbox-designed range, the Powerbox PBB3S is backed by Australian engineering support, from model selection through to system integration. The selection table on this page lists the key electrical data for each model. Download the datasheet for full specifications, or contact our team to discuss the right model for your application.

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Features

12Vdc and 24Vdc. 50W. 100W. 150W power supplies
High reliability and high efficiency industrial-grade
Switching power converter
AC input range from 100Vac to 240Vac nominal without power derating
Light weight corrosion resistant aluminium enclosure
Output overcurrent and short circuit protection
Output overvoltage protection
Overtemperature protection
Green Mains DC OK LED

Specifications

INPUT
Input Voltage	100-240Vac
Nominal Frequency	50–60Hz
Input Current	50W Models: 1.5A 100W Models: 2.8A PBB3S-12-12: 2.0A PBB3S-24-6: 3.2A
Power Factor	Conforms to EN61000-3-2

DISPLAYS / ALARMS
Mains/DC OK	Green LED: ON=OK

OUTPUT
Output Voltage	12V, 24Vdc
Output Power	50W, 100W
Output Current	See Table
Ripple and Noise	See Table, BW=20MHz
Short Circuit Protection	Hiccup, non-latching
Overcurrent Protection	Hiccup overcurrent protection >115% of rated current
Overvoltage Protection	See table, Hiccup

STANDARDS
Safety	AS/NZS60950.1, Class I
Isolation	I/P to Output - 3.0 kVac, 1 min. I/P to Ground - 1.9 kVac, 1 min. O/P to Ground - 500 Vac, 1 min.
EMC	AS/NZS CISPR22 Class B

ENVIRONMENTAL
Operating Ambient Temp.	-10°C to 70°C Derating: -2.5%/°C above 40°C
Cooling	Natural Convection
Overtemperature Protection	Automatic – Self resetting

MECHANICAL
Case Size	219x114x62mm (LxWxH)
Weight	50W Models: 600g 100W Models: 900g 150W Models: 1050g

Selection Table

MODEL NUMBER	OUTPUT VOLTAGE	OUTPUT CURRENT	OUTPUT POWER	OUTPUT RIPPLIE & NOISE	OVERVOLTAGE TRIP
PBB3S-12-4	12.0Vdc	4.17A	50W	<100mVp-p	16Vdc +10%/-5%
PBB3S-12-8	12.0Vdc	8.33A	100W	<100mVp-p	16Vdc +10%/-5%
PBB3S-12-12	12.0Vdc	12.5A	150W	<100mVp-p	16Vdc +10%/-5%
PBB3S-24-2	24.0Vdc	2.1A	50W	<150mVp-p	32Vdc ±10%
PBB3S-24-4	24.0Vdc	4.17A	100W	<150mVp-p	32Vdc ±10%
PBB3S-24-6	24.0Vdc	6.25A	100W	<100mVp-p	32Vdc +10%/-5%

Technical Drawings

Technical drawing of a power supply unit with dimensions.

Downloads

PBB3S-Series-DS-251121.pdf

Warranty & Returns

Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.

FAQs

What is the Powerbox PBB3S Series?

The PBB3S is an IEC cable / AC mains lead series from Powerbox, designed to provide the correct, compliant AC mains input connection for the Cincon TRH series (TRH50A, TRH70A, TRH100A) external power supplies.

What power rating does the PBB3S cover?

The PBB3S is available in models from 50W to 150W to match the Cincon TRH50A, TRH70A, and TRH100A power supplies respectively.

Why is a specific IEC lead recommended rather than a generic cable?

The PBB3S is rated and configured for the specific current and connector requirements of the Cincon TRH series. Using a correctly rated and matched lead ensures safety compliance and optimal performance.

What connector type does the Powerbox PBB3S use, and what is it compatible with?

The PBB3S is an IEC 60320 C13-to-C14 mains lead — it has an IEC C13 female connector at the device end, which plugs into the C14 male inlet on the Cincon TRH50A, TRH70A, and TRH100A power supplies. The Australian/NZ variant uses a standard AS/NZS 3112 3-pin flat plug at the mains end. C13-to-C14 is the same connector standard used on PC power supplies, monitors, and a wide range of IEC-rated equipment.

Is the PBB3S available with Australian plug?

Yes — contact Powerbox for the Australian/NZ (AS/NZS 3112) plug variant.

What safety certifications does the Powerbox PBB3S carry for use in Australia and New Zealand?

The PBB3S is approved under the RCM (Regulatory Compliance Mark) scheme to AS/NZS 3112 (Australian/NZ mains plug) and relevant IEC mains cable safety standards, confirming it is approved for connection to Australian 230Vac mains supply. As a Powerbox own-brand accessory, it is sourced to match the compliance requirements of the Cincon TRH series it is designed to accompany. Contact Powerbox at sales@powerbox.com.au or call 1800 251 380 to order the correct model.

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