MikroTik CRS305‑1G‑4S+OUT (FiberBox Plus) is an outdoor IP66 smart switch with 1× Gigabit PoE-in, 4×10G SFP+, dual power options, passive cooling, and 41 Gbps L2 throughput—ideal for rugged fiber-edge use.

Here are the detailed specifications for the MikroTik CRS305‑1G‑4S+OUT (FiberBox Plus):

🧠 Core Hardware

• Product Code: CRS305‑1G‑4S+OUT
• CPU: Marvell 98DX226S, ARM 32‑bit, dual-core @ 800 MHz
• RAM: 256 MB
• Storage: 16 MB flash

🌐 Ports & Connectivity

• Ethernet: 1 × Gigabit RJ45 (supports PoE‑IN 802.3af/at / passive)
• Fiber: 4 × SFP+ cages supporting 1.25 Gbps/10 Gbps modules
• Power Inputs: 3 options—RJ45 PoE‑IN, DC jack (24–57 V), 2‑pin terminal (24–57 V)

⚡ Power & Cooling

• Max Power Draw: ~17 W (7 W idle)
• Cooling: Fully passive, fanless

🌡 Physical & Environmental

• Dimensions: ~330 × 200 × 70 mm (per vendor spec)
• Operating Temp: –40 °C to +70 °C
• Ingress Rating: IP66 outdoor-rated enclosure
• MTBF: ~200,000 hours @ 25 °C

⚙️ Software & Performance

• OS: Dual‑boot RouterOS v7 or SwOS, Level 5 license
• Switching Performance (non-blocking L2):
  • Throughput: ~40–41 Gbps
  • Capacity: ~80–82 Gbps
  • Forwarding: ~61 Mpps @ 64 byte

📦 Included Accessories

• 48 V 0.95 A power adapter
• PoE injector
• Mounting brackets (K‑41 & K‑72) + hose clamp
• Standard accessories included

✅ Use Case Summary

Designed for outdoor fiber deployments, this rugged, IP66-rated switch supports 4×10 GbE SFP+, dual power redundancy, and passive PoE options—even under extreme environmental conditions.

Datasheet