A smart-managed Gigabit Ethernet switch with 24 RJ-45 access ports and four 1GbE SFP uplink ports.
The HPE Networking Instant On Switch 1840 S5E28A provides 24 autosensing 10/100/1000BASE-T RJ-45 ports and four 1GbE SFP ports. It offers 56 Gbps switching capacity, supports jumbo frames up to 9216 bytes, and includes Instant On Cloud Portal, mobile app, web browser, and SNMP management options. The switch has an internal power supply, one fixed non-field-replaceable fan, and supports rack, tabletop, wall, and under-table mounting using the provided brackets.
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 | 24 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 | No | Yes | Yes |
| PoE Budget | — | 400 W | 128 W |
| PoE Output Type | — | 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 · 24 ports, Fiber Optic Transceiver · 1G · Fiber · 4 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 | 444 mm | — | — |
| Height | 44 mm | — | — |
| Depth | 306 mm | — | — |
| Weight | 2.99 kg | — | — |
| Switching capacity | 56 Gbps | — | — |
| Forwarding capacity | 41.66 Mpps | — | — |
| MAC address table size | 16000 count | — | — |
| Power draw | maximum · 19.9 W, idle · 5 W | — | — |
| Number of fans | 1 count | — | — |
| MTBF | 1533000 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 | Active (fan) | — | — |
| Switching latency | 100M · 10.3 µs, 1G · 6.2 µs | — | — |
| Acoustic noise | 18 dB | — | — |
| Maximum frame size | 9216 bytes | — | — |
| Input current, maximum | 0.4 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, UL 62368, IEC 62368-1, FCC Part 15 Class A, EN 60825-1, IEC 60825-1, CISPR 32 Class A, ICES-003 Class A, VCCI Class A, CNS 13438 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 | — | — |
| 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 | — | — |
| 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, Access control lists (MAC/IP), 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 | — | — |
| Airflow direction | Side-to-side | — | — |
| Maximum heat dissipation | 67.9 BTU/h | — | — |
| Rated input current | 0.4 A | — | — |
| Maximum VLANs | 64 count | — | — |
| Number of power inputs | 1 count | — | — |
| Hot-swappable | No | — | — |
| Maximum ACLs | 50 count | — | — |
| Directives | RoHS, WEEE, REACH | — | — |
| Routing protocols | Static routing | — | — |
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