StarTech AF221C-POE-INJECTOR 2-Port Gigabit PoE+ Injector

Overview

The StarTech AF221C-POE-INJECTOR is a two-port midspan PoE+ injector designed for installations where your existing switch lacks Power over Ethernet capability or where you need to extend PoE to a small number of devices without replacing infrastructure. It supports both IEEE 802.3at (PoE+, up to 30W) and IEEE 802.3af (PoE, up to 15.4W) per port — meaning it handles a wide range of powered devices including PTZ cameras, dual-band wireless access points, and VoIP endpoints. The injector accepts 100–240V AC input, making it globally compatible and ready for deployments where local power standards vary.

At 60 grams and 10.2 cm in length, the AF221C-POE-INJECTOR (often searched as AF221C POE INJECTOR) is compact enough to tuck behind a rack panel or mount in a server room corner without dedicated real estate. This is a passive-format injector — no management interface, no configuration required. Power it on, connect your data and device ports, and your PoE-dependent endpoints are live.

Key Features

• Dual-Standard PoE Output (802.3at / 802.3af): With 30W available per port at 52V DC / 0.580A, this injector comfortably powers PTZ cameras and 802.11ac access points that demand PoE+. Devices that only require standard PoE (802.3af, up to 15.4W) — like fixed IP cameras or VoIP phones — negotiate down automatically. No manual switching between power classes.
• 1000 Mbps Gigabit Throughput: Full 1Gbps data rate passes through without bottlenecking. On a surveillance network where cameras stream H.265 at 4–8 Mbps each, this headroom is more than sufficient — but the real benefit is future-proofing against higher-bitrate sensors or NVR configurations that benefit from Gigabit uplinks.
• 9K Jumbo Frame Support: Jumbo frames reduce packet overhead on high-throughput network segments. In practice, this matters most when you're pushing multiple simultaneous high-resolution video streams and want to minimize CPU overhead on the network path.
• ±15kV Air / ±8kV Contact ESD Protection: On runs from outdoor camera locations back to interior network closets, induced ESD from nearby electrical equipment is a real failure mode. The ±15kV air discharge and ±8kV contact discharge ratings on the AF221C-POE-INJECTOR mean the unit handles the kind of static events common in warehouse or manufacturing environments without damage.
• 100m Maximum Cable Distance: The injector maintains 1000BASE-T performance at the full 100m Cat5e/Cat6 limit — so you're not trading PoE delivery for reduced run length. Install at the closet and reach the full floor without a midpoint repeater.
• 100–240V AC Universal Input: The auto-ranging AC input (1.5A max) accepts any global mains voltage without a step-down transformer. Useful for multi-site rollouts where facilities teams may be sourcing power from different regions.
• 0°C – 60°C Operating Range: Rated for standard data closet and office environments. Note: this is not rated for outdoor or uncontrolled temperature environments — plan accordingly if the injector is destined for an outdoor enclosure.

Integration and Compatibility

The AF221C-POE-INJECTOR sits inline between your non-PoE switch and any IEEE 802.3at/af-compliant powered device. There's no VLAN awareness, no SNMP agent, and no remote management — this is intentional. For installations with two PoE endpoints where a managed PoE switch is over-specified or budget-constrained, this injector delivers exactly what's needed without adding management complexity. It integrates cleanly with any IP camera lineup that accepts standard PoE or PoE+, and pairs naturally with network switches that lack onboard PoE ports. If you're building out a network video recorder system with a non-PoE NVR and a small camera count, two injectors like this replace the need for a dedicated PoE switch entirely at lower camera counts. For larger deployments, review our PoE switch options — managing per-port power budgets centrally becomes worthwhile above four or five devices. Consider reviewing a PoE planning guide before scaling this approach across multiple closets.

Frequently Asked Questions

Q: Does the AF221C-POE-INJECTOR support both PoE and PoE+ devices, or only one standard?

A: It supports both IEEE 802.3at (PoE+, up to 30W) and IEEE 802.3af (PoE, up to 15.4W). Devices negotiate the appropriate power class automatically — no manual configuration needed.

Q: What is the maximum data rate through the injector?

A: The injector passes data at up to 1000 Mbps (1 Gbps) per port, supporting 10BASE-T, 100BASE-Tx, and 1000BASE-T Ethernet standards.

Q: Can I use the AF221C-POE-INJECTOR in an outdoor or uncontrolled temperature environment?

A: The operating temperature range is 0°C to 60°C. It is not rated for outdoor installation or environments outside that range — mount it in a conditioned or semi-conditioned indoor space.

Q: What power supply does the injector require?

A: It accepts 100–240V AC at up to 1.5A — universal mains input. No external power adapter is required beyond a standard AC outlet.

Q: What is the warranty on the AF221C-POE-INJECTOR?

A: StarTech provides a 2-year manufacturer warranty on this product.

Q: Does the injector support jumbo frames?

A: Yes, the AF221C-POE-INJECTOR supports jumbo frames up to 9K, reducing packet processing overhead on high-throughput video network segments.

Eden Phillips

The AF221C-POE-INJECTOR gets deployed most often when an integrator inherits a non-PoE switch — typically an older unmanaged gigabit unit — and needs to bring one or two IP cameras or access points online without a full switch swap. The 30W-per-port output at 52V DC covers the majority of current-generation PoE+ cameras, including PTZ units that spike power during motor operation. That said, this is a two-port device, so scope it accordingly.

Technical Highlights:

• 30W PoE+ per port (802.3at): At 0.580A / 52V DC, each port delivers the full Class 4 budget — sufficient for PTZ cameras, 802.11ac dual-band APs, and most IP intercoms without derating.
• ±15kV ESD Protection: Air discharge protection at ±15kV is a meaningful spec in warehouse or light industrial settings where cable runs pass near motor-driven equipment. Most budget injectors skip this — StarTech includes it on this unit.
• 9K Jumbo Frame Passthrough: If you're running a jumbo-frame-enabled core switch, the injector won't be the segment that breaks frame sizing. The 9K support keeps the data path consistent end-to-end.

Deployment Considerations:

• Total power consumption is rated at 65W for the unit — size your UPS or PDU circuit to handle that load plus margin, especially if you're running two PoE+ devices at full draw simultaneously.
• Operating temperature tops out at 60°C. In a sealed outdoor enclosure in direct sun, ambient can exceed that — verify your enclosure's thermal management before mounting the injector outside a climate-controlled space.

This injector fits cleanly in small retail or branch office deployments where two cameras or APs need PoE and replacing the switch is not on the project scope. It is not the right tool for camera counts above two or for environments requiring per-port power monitoring.