An 8-port Gigabit Ethernet smart-managed switch with Class 4 PoE and two 1GbE SFP uplink ports.
The HPE Networking Instant On Switch 1840 model S5E27A provides eight RJ-45 autosensing 10/100/1000BASE-T ports with IEEE 802.3at Class 4 PoE and two 1GbE SFP ports. It delivers 124W of PoE power, 20Gbps switching capacity, support for jumbo frames up to 9216 bytes, and management through the Instant On Cloud Portal, mobile app, web browser, and SNMP manager. The fan-less switch supports tabletop, wall, under-table, and rack mounting, with a 2-post rack kit included.
How this product lines up against others in Home & Office.
| Installation method | Rack 19", Desktop, Wall, Under-table | — | — |
| Link technology | Ethernet | Ethernet | Ethernet |
| Port speed | 1G | 2.5G | 2.5G |
| Rack Units Height | 1 U | 1 U | — |
| Product line | Instant On | — | — |
| Lifecycle status | Active | — | — |
| Operating temperature | 0 to 40 °C | -5 to 45 °C | -5 to 45 °C |
| Specification group | active | — | active |
| Downlink Media Type | Ethernet | Ethernet | Ethernet |
| Downlink Ports | 8 ports | 24 ports | 8 ports |
| Downlink Speed | 1 Gbps | 1 Gbps | 1 Gbps |
| Uplink Media Type | Fiber | Fiber | Fiber |
| Uplink Speed | 1 Gbps | 2.5 Gbps | 2.5 Gbps |
| AC Input Voltage | 100 to 240 V | 90 to 290 V | 170 to 264 V |
| HVDC Input Voltage | — | 190 to 290 V | — |
| Input Frequency | 50 to 60 Hz | 45 to 65 Hz | 47 to 63 Hz |
| PoE | Yes | Yes | Yes |
| PoE Budget | 124 W | 400 W | 128 W |
| PoE Output Type | PoE+ 802.3at | PoE 802.3af, PoE+ 802.3at | PoE 802.3af, PoE+ 802.3at |
| Input Type | AC mains | — | AC mains |
| Network Ports | Copper and Ethernet · 1G · Ethernet · 8 ports, Fiber Optic Transceiver · 1G · Fiber · 2 ports | Copper and Ethernet · 1G · Ethernet · 24 ports, Fiber Optic Transceiver · 2.5G · Fiber · 2 ports | Copper and Ethernet · 1G · Ethernet · 8 ports, Fiber Optic Transceiver · 2.5G · Fiber · 2 ports |
| Device Role | Switch | Switch | Switch |
| Width | 295 mm | — | — |
| Height | 44 mm | — | — |
| Depth | 296 mm | — | — |
| Weight | 2.18 kg | — | — |
| Switching capacity | 20 Gbps | — | — |
| Forwarding capacity | 14.88 Mpps | — | — |
| MAC address table size | 16384 count | — | — |
| Power draw | maximum · 146.4 W, idle · 9 W | — | — |
| Number of fans | 0 count | — | — |
| MTBF | 1340280 hours | — | — |
| Operating humidity | 15 to 95 % | — | — |
| Storage temperature | -40 to 70 °C | — | — |
| Storage humidity | 15 to 95 % | — | — |
| Maximum altitude | 3000 m | — | — |
| Processor model | ARM Cortex-A9 | — | — |
| CPU maximum clock | 1.2 GHz | — | — |
| Memory capacity | 1 GB | — | — |
| Onboard storage capacity | 0.26 GB | — | — |
| Cooling method | Passive (fanless) | — | — |
| Switching latency | 100M · 10.3 µs, 1G · 6.2 µs | — | — |
| Maximum frame size | 9216 bytes | — | — |
| Input current, maximum | 1.5 A | — | — |
| Packet buffer | 0.51 MB | — | — |
| Two-post mountable | Yes | — | — |
| Device management | Cloud portal, Mobile app, Web GUI, SNMP, CLI | — | — |
| Rail kit included | Yes | — | — |
| Lifetime warranty | Yes | — | — |
| Compliance standard | EN 55032, EN 55035, EN 62368-1, IEC 62368-1, UL 62368, CAN/CSA C22.2 No. 62368-1, EN 60825-1, IEC 60825-1, CISPR 32 Class A, ICES-003 Class A, CNS 13438 Class A, AS/NZS CISPR 32 Class A, CISPR 35, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN 61000-4-8, EN 61000-4-11, EN 61000-3-2, EN 61000-3-3, FCC Part 15 Class A | — | — |
| Security features | Trusted Platform Module (TPM), DoS protection, Two-factor authentication (2FA) | — | — |
| IP protocols | DHCP, Static IP, IPv4, NTP | — | — |
| Memory type | DDR4 | — | — |
| Onboard storage type | NAND flash | — | — |
| PoE ports | 8 ports | — | — |
| Power supply type | Internal | — | — |
| Switching features | Spanning Tree (STP, 802.1D), Rapid Spanning Tree (RSTP, 802.1w), Link aggregation (LACP, 802.3ad), VLANs (802.1Q), Traffic prioritisation (802.1p), DSCP QoS, Flow control (802.3x), IGMP snooping, LLDP (802.1AB), LLDP-MED, Port mirroring, Loop protection, BPDU filtering, BPDU guard, Storm control, Energy-Efficient Ethernet (802.3az), Auto MDI/MDI-X, Cable diagnostics, Port security, Management VLAN | — | — |
| Management protocols | SNMPv1, SNMPv2c, HTTP, HTTPS, SSH, Telnet, SCP, TFTP, Syslog | — | — |
| Link aggregation groups | 16 count | — | — |
| Ports per aggregation group | 8 ports | — | — |
| QoS queues | 4 count | — | — |
| Switching layer | Layer 2 | — | — |
| Management level | Smart managed | — | — |
| Maximum heat dissipation | 499.3 BTU/h | — | — |
| Rated input current | 1.5 A | — | — |
| Maximum VLANs | 64 count | — | — |
| Number of power inputs | 1 count | — | — |
| Maximum ARP entries | 50 count | — | — |
| Maximum ACLs | 2048 count | — | — |
| Directives | RoHS | — | — |
| Routing protocols | Static routing | — | — |
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