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Power Supplies & Adapters

AC adapters, DC power supplies and replacement power packs for the CCTV equipment that isn't on PoE. Most modern IP cameras run on PoE, so a dedicated power supply usually isn't needed at the camera — but the rest of the install still needs power: standalone NVRs and DVRs, intercom stations, access control panels, alarm hubs, and the occasional analog camera or specialist component that runs on 12 V or 24 V DC rather than PoE. This collection covers the AC adapters (mains-powered wall plugs) and bulk DC supplies for those use cases.

Security Cameras Australia stocks genuine and quality third-party power supplies with full warranty. Every unit is matched to the specific voltage and current requirements of the equipment it powers.

For PoE-powered cameras (the majority of modern IP CCTV), no separate power supply needed — the PoE switch or PoE-enabled NVR delivers power through the Cat6 cable. This collection covers everything that isn't on PoE.

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What's actually in this collection

  • AC adapter wall plugs (12 V DC, 1–3 A typical) for individual NVRs, DVRs, intercoms and small access-control hardware.
  • 24 V AC and 24 V DC adapters for legacy analog cameras and specialist access-control panels.
  • 48 V DC supplies for some Cisco and Aruba switch equipment, plus some VoIP and specialist comms hardware.
  • Bulk power supply units for multi-device installs — single mains-powered unit with multiple DC outputs.
  • Replacement power supplies matched to specific Hikvision, HiLook and other brand equipment SKUs.

How to spec a replacement power supply

Three things to match:

1. Voltage. Must match the equipment exactly — 12 V DC, 24 V AC, 24 V DC, 48 V DC. Mismatching voltage damages equipment, sometimes irreparably. The voltage is printed on the original power supply (label on the brick or the equipment input jack); always check before ordering.

2. Current. The replacement must equal or exceed the original's amp rating — a 12 V 2 A supply can be replaced with 12 V 2 A, 12 V 2.5 A, 12 V 3 A and so on, but not with 12 V 1 A (insufficient current). Equipment draws what it needs; higher-rated supplies don't damage the equipment.

3. Connector and polarity. DC barrel connectors come in multiple sizes (5.5 × 2.1 mm is the common standard; 5.5 × 2.5 mm and others exist). Polarity matters — most equipment is centre-positive, but some specialist gear is centre-negative. Match exactly.

When the original supply has failed — replacing safely

Power supplies fail more often than the equipment they power — capacitors degrade, plugs wear out, brick housings crack. When the equipment "stops working" the first thing to check is the power supply with a multimeter (rated voltage on the output? steady, or fluctuating?). Replacement is cheap relative to assuming the equipment itself is broken.

Important: don't use random third-party power supplies from the parts bin. Mismatched voltage damages equipment; over-rated current is fine but under-rated current causes brownout instability. When in doubt, send us the equipment model and we'll match the right replacement.

Why buy from Security Cameras Australia

  • Authorised Australian dealer · genuine and quality third-party supplies.
  • Expert matching · tell us the equipment model and we'll spec the right supply.
  • Price-match guarantee · Free shipping · 30-day returns.

Shop the power supply range

Browse the power supply range below, or talk to us about replacing a specific power supply — send us the equipment model and we'll match the voltage, current and connector.

Frequently Asked Questions about Power Supplies & Adapters

Do I need a separate power supply for my IP camera?

No, for PoE-powered IP cameras (the majority of modern IP CCTV). A PoE switch or PoE-enabled NVR delivers both power and data through the Cat6 cable, so no separate power supply is needed at the camera. Standalone power supplies are needed for: non-PoE legacy cameras, NVRs that aren't ceiling/wall-mounted on a UPS, intercom stations, access-control panels, alarm hubs, and other components that don't draw power from a switch.

Can I replace a 12 V 2 A power supply with a 12 V 3 A?

Yes — voltage must match exactly (12 V to 12 V), but current rating can be equal or higher. Equipment draws only what it needs; a higher-rated supply provides headroom and runs cooler. Lower-rated supplies cause brownout instability and can damage equipment under load. The rule: same voltage, equal or higher current.

What happens if I use the wrong voltage power supply?

Damage, sometimes immediate and irreparable. Equipment expecting 12 V given 24 V will likely have its input circuitry destroyed within seconds. Equipment expecting 24 V given 12 V won't work and may suffer over time. Mismatched voltage is the most common cause of equipment damage in CCTV installs — verify before connecting. If in doubt, multimeter the supply output before plugging in.

How do I know if my power supply has failed?

Symptoms: equipment intermittently restarts, fails to boot, runs hot, or shows error codes consistent with low voltage. Diagnosis: multimeter the supply output with the load disconnected (should read the rated voltage steady, e.g. exactly 12 V on a 12 V supply, ±5%); then with the load connected (should still read close to rated voltage; a significant sag indicates the supply can't deliver). Power supplies are typically cheaper to replace than the equipment they power.

What's the connector size on a typical 12 V CCTV power supply?

5.5 × 2.1 mm barrel plug is the most common — 5.5 mm outer diameter, 2.1 mm inner pin. 5.5 × 2.5 mm exists on some equipment (slightly larger inner pin). Polarity is typically centre-positive (positive on the inner pin, negative on the outer sleeve), but some specialist gear is centre-negative. Both the connector size and polarity are printed near the equipment's power input jack — verify before ordering replacement.
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