Part Information Review and Updates

flux

2:29

Analyzing the schematic.

Analyzing the PCB layout.

Looking for "POE70P-50LD Coilcraft: manufacturer part number, package/style, pin count, description, electrical summary, dimensions, pin names/functions, and any mechanical footprint recommendations." in poe_ep-463527.pdf

Looking for "For POE70P-50LD, provide the complete pinout/pin functions, package drawing, recommended land pattern if present, and key magnetic/electrical specs such as inductance, output voltage/current application, isolation, DCR, turns ratio, and dimensions." in poe_ep-463527.pdf

Reviewing POE70P schematic.

Looking for "For the Coilcraft POE70P-50LD transformer only, list each package pin number 1 through 8 and identify which winding terminal it belongs to (primary, bias, or secondary), including polarity/dot end if shown in the datasheet schematic or package drawing." in poe_ep-463527.pdf

Looking for "For POE70P-50LD, what are the exact package pins on the left side and right side in the recommended land pattern/package drawing? Also identify which pin is marked by the pin-1 dot and how the primary, bias, and secondary windings map to those pins." in poe_ep-463527.pdf

Analyzing datasheet and footprint.

Reviewing design and specifications.

Reviewing part specifications.

Clarifying citation requirements.

Managing component references.

Part review summary
I reviewed the current part metadata, the existing terminal-based symbol, the footprint pad set, and the linked datasheet. The existing Datasheet URL is already populated, so I did not overwrite it.
Metadata check

Current project properties vs datasheet

FieldCurrent projectDatasheet / source checkStatus
Manufacturer Part NumberPOE70P-50LDDatasheet family shows base part POE70P-50L_ with D as the reel packaging suffix; distributor listing includes POE70P-50LDOK
Manufacturer NameCOILCRAFTCoilcraftOK
Datasheet URLMouser-hosted PDFValid datasheet found and usableOK
Designator PrefixTTransformer prefix T is appropriateOK
Package / Case CodeNot setDatasheet shows an 8-pin SMD flyback transformer package with a recommended land patternMissing
Pin CountNot set as a propertyDatasheet and project both indicate 8 pinsOK
DescriptionAudio Transformers / Signal Transformers POE70P Flyback 7uH 5.0 V 1.4 ADatasheet indicates 155 µH primary inductance, 7 W, 5.0 V / 1.4 A outputMismatch
Key specs from the datasheet

POE70P-50LD key specifications

ItemValue
FunctionFlyback transformer for PoE applications
Power7 W
Input operating condition36 V to 72 Vdc, continuous mode, 250 kHz
Primary inductance155 µH at 0 A
Primary inductance at Ipk139.5 µH min
Peak primary current0.65 A
DCR maxPrimary 0.414 Ω, Bias 0.822 Ω, Secondary 0.060 Ω per secondary winding
Leakage inductance3.60 µH max
Turns ratioPrimary:Secondary 1:0.262, Primary:Bias 1:0.667
Main output5.0 V, 1.4 A
Bias output12 V, 20 mA
Isolation1500 Vrms primary/bias-to-secondary; 500 Vrms between other windings
Ambient temperature-40°C to +85°C
Max part temperature+125°C
Weight3.85 g
Symbol review

What matches

CheckResult
Terminal count8 terminals present in schematic, matching the datasheet
Winding groupsThe symbol clearly separates bias, primary, and secondary windings
Secondary splitThe symbol represents the two secondary windings separately, which aligns with the datasheet note that they are connected in parallel on the PCB

What does not match or is incomplete

IssueDetails
Pin types missingAll 8 terminals currently have Pin Type = Unspecified
Pin descriptions missingNo Pin Description properties are populated on the terminals
Possible pin-name polarity mismatchThe datasheet mapping is: pin 1 = PRI dot, 3 = PRI non-dot, 4 = BIAS dot, 2 = BIAS non-dot, 6/8 = secondary dot ends, 5/7 = secondary non-dot ends. Your current labels appear to assign polarity by +/-, but transformer dot convention is not always equivalent to DC + / -, so these labels should be verified carefully.
Pin-number-to-label conventionThe symbol uses functional labels instead of numeric pin names. That can be fine, but the polarity meaning should explicitly match the datasheet dot convention.
Datasheet pin mapping vs current symbol labels

Pin mapping cross-check

Datasheet pinDatasheet functionCurrent terminalAssessment
1Primary, dot endBIAS_-Mismatch
2Bias, non-dot endBIAS_ Polarity label likely questionable
3Primary, non-dot endPRI_ Polarity label likely questionable
4Bias, dot endPRI_-Mismatch
5Secondary, non-dot endSEC_ _1Polarity label likely questionable
6Secondary, dot endSEC_ _2Polarity label likely questionable
7Secondary, non-dot endSEC_-_1Polarity label likely questionable
8Secondary, dot endSEC_-_2Polarity label likely questionable
Footprint review

What I could verify

CheckResult
Footprint existsYes
Pad count8 pads, matching the datasheet package
Pin-1 conventionDatasheet explicitly marks pin 1 with a dot
Recommended land patternPresent in the datasheet

Limitations from current project data

ItemResult
Exact pad geometry / spacing comparisonNot fully exposed by the current layout query
Exact land-pattern dimension matchCould not be conclusively verified from the available layout output alone
Pad numbering in footprintThe footprint currently exposes pads by functional designator labels rather than clearly visible numeric pad IDs in the returned data
Main mismatches to fix

Flagged issues

PriorityIssueRecommendation
HighProject description says 7uHChange to 155 µH primary inductance and mention 7 W
HighPin 1 and pin 4 functional labels appear swapped between primary and biasCorrect terminal naming or pin-number assignment to match datasheet
HighAll terminal Pin Type values are UnspecifiedSet to appropriate types, likely Passive for transformer windings
MediumNo pin descriptionsAdd short descriptions like Primary dot, Bias non-dot, Secondary A dot, etc.
MediumPackage / case metadata missingAdd package/case code based on datasheet package
Medium+/- terminal naming may be misleadingPrefer dot/non-dot naming unless you specifically want application-level polarity aliases

Recommended corrected description

Suggested description
Flyback transformer for PoE applications, 7 W, 155 µH primary, 5.0 V 1.4 A output, 12 V 20 mA bias
If you want, I can make the next pass and fix the terminal pin mapping, set all pin types/descriptions, and update the part metadata/description in the project.
Fix all mismatches
Review power parts first
Check missing datasheets
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POE70P-50LD

POE70P-50LD thumbnail
Audio Transformers / Signal Transformers POE70P Flyback 7uH 5.0 V 1.4 A SMD,12.7x10.5mm Pulse Transformers RoHS The POE70P-50LD, manufactured by Coilcraft, is a magnetic component designed for PoE applications, where electrical power is delivered together with data over Ethernet cables. It is optimized for isolated DC-DC conversion in network-powered devices. Key Characteristics Part Type: PoE transformer / flyback transformer Technology: Magnetic (ferrite core) transformer Mounting: Surface-mount (SMT) Power Rating: ~7 W Isolation Voltage: up to 1500 Vrms Input Range: typically 36–72 V (PoE standard range) Output Example: ~5 V / 1.4 A (depending on design) Core Material: Ferrite Operating Temp: −40 °C to +85 °C Function (How it works) Converts high-voltage PoE input into low-voltage DC output Provides galvanic isolation between Ethernet line and device Works in a flyback converter topology Supports efficient energy transfer and EMI control Typical Applications IP cameras VoIP phones Wireless access points Network switches Industrial IoT devices #CommonPartsLibrary #Transformer

Properties

POE70P-50LD

COILCRAFT

Transformer

mouser.com/datasheet/2/597/poe_ep-463527.pdf

T

creativecommons.org/licenses/by/4.0/

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