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Analog Devices LTC4257IS8-1#PBF — Signal Isolation

LTC4257IS8-1#PBF PoE PD Controller, 12.95 W, 8-SOIC

MPNLTC4257IS8-1#PBF
End of Life

Analog Devices LTC4257IS8-1#PBF PoE PD controller, single-channel, 12.95 W max, internal switch, 802.3af compliant, 8-SOIC package, tube.

$3.56Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LTC4257IS8-1#PBF specifications
ParameterValue
TypeController (PD)
MountingSurface Mount
Voltage57V (Max)
Current - supply3mA
Power - max12.95 W
Operating temperature-40°C ~ 85°C
Standards802.3af (PoE)
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)
Auxiliary senseNo
Internal switchYes
Channels1

Product details

PoE PD controller with integrated FET

The LTC4257IS8-1#PBF is a single-channel Power over Ethernet Powered Device controller compliant with IEEE 802.3af, delivering up to 12.95 W to the load — the Class 0 power ceiling for PoE. An internal 100 V, 0.4 Ω switch FET integrates the power path, eliminating the external MOSFET and sense resistor typical in discrete implementations.

Industrial temperature and surface-mount footprint

Supply current is 3 mA typical, keeping the quiescent overhead low in systems where the PD's own consumption subtracts from the 12.95 W budget. The maximum input voltage is 57 V, matching the 802.3af PSE output ceiling.

Active production, ROHS3 compliant

Marked as Active in production status, with ROHS3 compliance.

Frequently asked questions

LTC4257IS8-1#PBF datasheet

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LTC4257IS8-1#PBF cross reference

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