PoE Switches- 16× GbE PoE
- 195 W budget
- 4× SFP
HPE Networking · PoE Switches
S5E31A – HPE Networking Instant On Switch 48p Gigabit 24p CL4 PoE 4p SFP 370W 1840
Forty-eight port rack switch with twenty-four Class 4 PoE ports and a 370 W budget — the flagship of the Series 1840.
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- PoE ports
- 24× GbE Class 4 PoE (ports 1–24)
- Access ports
- 24× GbE RJ45 (ports 25–48)
- Uplinks
- 4× 1G SFP (ports 49–52)
- PoE budget
- 370 W
- Switching capacity
- 104 Gbps
- Mounting
- 1U rack, 2-post kit included
- Ready Stock
- PAN India Supply
- Same Day Dispatch*
- GST Billing
- BOQ Assistance
*Same-day dispatch applies to in-stock items ordered before cut-off from the Delhi NCR warehouse.
Key Features
What the S5E31A is built to do
Technical Specifications
S5E31A specifications
Specifications as published for this model. Confirm project-critical values against the datasheet before ordering.
| Ports | |
|---|---|
| PoE ports | 24× RJ-45 autosensing 10/100/1000BASE-T with IEEE 802.3at Class 4 PoE (ports 1–24) |
| Access ports | 24× RJ-45 autosensing 10/100/1000BASE-T (ports 25–48) |
| Uplink | 4× SFP 1GbE ports (ports 49–52) |
| Standards | IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T |
| Duplex | 10BASE-T/100BASE-TX: half or full; 1000BASE-T: full only |
| Console port | Not available |
| PoE | |
|---|---|
| Total PoE budget | 370 W Class 4 PoE |
| PoE port count | 24 of 48 access ports |
| Per-port maximum | Up to 30 W (IEEE 802.3at) |
| Legacy support | IEEE 802.3af devices up to 15.4 W |
| Power allocation | LLDP-MED automatic, class of PoE, or usage-based |
| Scheduling | PoE scheduling and port scheduling |
| Performance | |
|---|---|
| Switching capacity | 104 Gbps |
| Throughput | 77.37 Mpps @ 64-byte packets |
| Latency (100 Mb, LIFO) | < 8.0 µs |
| Latency (1000 Mb, LIFO) | < 3.3 µs |
| MTBF | 122 years |
| Scale | |
|---|---|
| MAC address table | 16K entries |
| Maximum VLANs | 64 |
| IGMP groups | 1K groups |
| Jumbo frames | Up to 9216 bytes |
| IPv4/MAC ACL entries (ingress) | 50 |
| IPv4/MAC ACL entries (egress) | 512 |
| Maximum ACEs | 2048 |
| Link aggregation groups | 16 (8 members per group) |
| Processor and Memory | |
|---|---|
| Processor | ARM Cortex-A9 @ 1.25 GHz |
| SDRAM | 1 GB DDR4 |
| Flash | 512 MB NAND |
| Packet buffer | 4 MB |
| Physical | |
|---|---|
| Dimensions (D × W × H) | 14.45 × 17.48 × 1.73 in (36.70 × 44.40 × 4.40 cm) |
| Weight | 10.01 lb (4.54 kg) |
| Fans | 3 fixed fans, non field-replaceable |
| Primary airflow | Left to right |
| Acoustics | Sound power LWAd = 3.4 Bel; bystander sound pressure LpAm = 20 dB |
| Mounting | EIA-standard 19 in. rack or cabinet (2-post kit included); table-top; wall; under-table |
| Electrical | |
|---|---|
| Power supply type | Internal power supply |
| AC voltage | 100–127 VAC / 200–240 VAC |
| Frequency | 50 Hz / 60 Hz |
| Current | 4.7 / 2.3 A |
| Power consumption (100% traffic) | 100–127 V: 55.6 W; 200–220 V: 54.4 W |
| Power consumption (100% traffic + 100% PoE) | 100–127 V: 466.1 W; 200–220 V: 452.6 W |
| Power consumption (idle) | 100–127 V: 24.4 W; 200–220 V: 24.2 W |
| Heat dissipation (100% traffic + 100% PoE) | 100–127 V: 1590.3 BTU/hr, 1677.9 kJ/hr; 200–220 V: 1544.2 BTU/hr, 1629.2 kJ/hr |
| Environment | |
|---|---|
| Operating temperature | 32 °F to 104 °F (0 °C to 40 °C) |
| Storage temperature | −40 °F to 158 °F (−40 °C to 70 °C) |
| Operating humidity | 15% to 95% @ 104 °F (40 °C), non-condensing |
| Storage humidity | 15% to 95% @ 140 °F (60 °C), non-condensing |
| Altitude | Up to 10,000 ft (3 km) |
| Layer 2 Switching | |
|---|---|
| Spanning tree | 802.1D STP, 802.1w RSTP, BPDU filtering, loop protection |
| Link aggregation | LACP or manual, up to 16 trunks, max 8 ports per trunk |
| Multicast | IGMP v1, v2 snooping |
| Discovery | LLDP and LLDP-MED |
| QoS | CoS by DSCP or IEEE 802.1p, four hardware queues |
| Monitoring | Port mirroring by port or VLAN |
| Auto recovery | BPDU Guard, Storm Control, Port Security, Loop Protection, Link Flap Prevention |
| Management | |
|---|---|
| Options | Instant On Cloud Portal; Mobile App; Web Browser; SNMP Manager |
| SNMP | SNMPv1, v2c (read only) |
| Local web sessions | Up to 5 HTTP / HTTPS |
| File transfer | SCP and TFTP; dual image support (primary and secondary) |
| Diagnostics | Event logs, session logging, remote syslog, cable diagnostics, Ping IPv4 |
| Security | |
|---|---|
| Hardware root of trust | TPM 2.0 |
| DoS protection | Automatic denial-of-service protection |
| Storm control | Global Storm Control |
| Cloud account | Two-Factor Authentication (2FA) |
| Management encryption | HTTPS / SSL |
| Supported Transceivers | |
|---|---|
| R9D16A | Instant On 1G SFP LC SX 500 m OM2 MMF transceiver |
| S0G20A | Instant On 1G LX SFP LC 10 km SMF transceiver |
| R9D17A / R9D17B | Instant On 1G SFP RJ45 100 m Cat5e transceiver |
| Compliance & Warranty | |
|---|---|
| Safety | EN/IEC 62368-1 2nd & 3rd Ed.; UL 62368-1 3rd Ed.; CAN/CSA C22.2 No. 62368-1 3rd Ed.; EN/IEC 60825-1:2014 Class 1 |
| Emissions | EN 55032:2015/CISPR 32 Class A; FCC CFR 47 Part 15:2018 Class A; ICES-003 Class A; VCCI-32 Class A; CNS 13438 Class A; KS C 9832 Class A; AS/NZS CISPR 32 Class A |
| Immunity | BS/EN 55035, CISPR 35, KS C 9835; IEC 61000-4-2/-3/-4/-5/-6/-8/-11 |
| Warranty | HPE Networking Instant On limited lifetime; 24x7 phone support for 90 days, chat support for the warranty period |
Specifications sourced from the official HPE Networking catalogue. Where official pages disagree on a value, it is marked and confirmed during quotation.
Overview
About the S5E31A
The HPE Networking Instant On Switch 48p Gigabit 24p CL4 PoE 4p SFP 370W 1840 (S5E31A) is the flagship of the Series 1840: 48 gigabit access ports of which the first 24 supply IEEE 802.3at Class 4 PoE within a 370 W budget, plus four dedicated 1G SFP uplink ports.
It carries the largest PoE budget in the series by a wide margin — 370 W against 195 W on the 24-port S5E29A — and pairs it with the 48-port hardware platform: a 1.25 GHz processor, 512 MB of flash and a 4 MB packet buffer, giving 104 Gbps of switching capacity and 77.37 Mpps of forwarding. Egress ACLs are supported with 512 entries, and link aggregation groups take up to 8 members.
Three fixed fans handle the combined 48-port and 370 W PoE load, yet HPE rates the unit at 3.4 Bel sound power — quieter than the non-PoE S5E30A's 3.9 Bel. At full traffic and full PoE it draws 466.1 W at 100–127 V, which is the figure to size the rack circuit and UPS against.
Applications
Where the S5E31A is deployed
Downloads
S5E31A documents
Datasheets and manuals are shared without sign-up. Documents not yet hosted online are sent on request within working hours.
- HPE Networking Instant On Switch Series 1840 QuickSpecs (PDF)Download
Related Products
Pairs with the S5E31A
Edge PoE switches below it, SFP+ modules in its uplinks, and sibling models for smaller or larger sites.
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Before You Enquire
Frequently asked questions
How many ports on the S5E31A supply PoE?
Twenty-four of the forty-eight access ports — ports 1 to 24 — supply IEEE 802.3at Class 4 PoE at up to 30 W each within a 370 W total budget. Ports 25 to 48 are standard copper with no power.
What circuit does the S5E31A need at full load?
At 100% traffic with 100% PoE it draws 466.1 W at 100–127 V or 452.6 W at 200–220 V, with a rated current of 4.7 / 2.3 A. Heat dissipation reaches 1590.3 BTU/hr. Size the rack circuit and UPS against those figures.
Is the S5E31A louder than the non-PoE 48-port model?
No — it is quieter despite having three fans against one. HPE rates the S5E31A at 3.4 Bel sound power and 20 dB bystander sound pressure, against 3.9 Bel and 25 dB for the S5E30A.
Compare the S5E30AS5E31A or two S5E29A switches?
The S5E31A gives 24 PoE ports and 370 W in one 1U unit with 104 Gbps capacity. Two S5E29A units give 32 PoE ports and 390 W total but occupy 2U, need two uplink sets and cap at 56 Gbps each. Choose the S5E31A for consolidation, the pair where the drops are physically split across two areas.
Does the S5E31A support egress ACLs?
Yes, with 512 entries — a capability shared only with the S5E30A. The 8-port and 24-port models in the series do not support egress IPv4/MAC ACLs.
What is the price of the HPE S5E31A in India?
Pricing is quotation-based with dealer slabs for registered partners. Name the S5E31A and quantity in a quote request and you receive priced options with confirmed availability within 24 working hours.
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