Murata Footprint Keepout

Fix this issue: Official Murata land pattern matches the 7 pads and their dimensions/coordinates, but the footprint does not encode the datasheet isolation-barrier/under-module placement keepout or primary-side copper guidance.

Thought for 7 sec

flux

I’ll update the footprint with datasheet-derived copper/placement keepouts beneath the module, explicitly preserving the primary-to-secondary isolation barrier and primary-side copper restrictions, then verify the geometry against the official Murata drawing. This requires Agent mode to research the exact boundaries and edit the footprint.

adrian95

try again

Thought for 15 sec

flux

I’ll inspect the footprint, verify Murata’s exact under-module isolation and copper restrictions, then encode and validate the required keepouts.

Worked for 14 mins 2 sec

flux

Updated and verified the footprint:

Added a 4 mm central isolation keepout on Top and Bottom layers.
Added dashed isolation boundaries at X = ±2 mm.
Added the 35.5 × 22.4 mm no-parts-under-module boundary.
Added primary-side “GND copper only” and placement warning labels.
Confirmed all seven original pads and coordinates remain unchanged.

Files

Pins

Symbol

Layout

3D View

Part Audit — MYBSP0055AABFT

Result

The part identity and electrical description are consistent with the official Murata documentation. The existing Datasheet URL is already populated with an official Murata PDF URL, so no property update was required.

Existing datasheet: https://www.murata.com/products/productdata/8807034454046/MYBSP0055AABFT.pdf
Current Murata series datasheet endpoint: https://pim.murata.com/asset/pim4/isolatedDCDCconverter/MYBSP_AT_T_PDF_ISOLATEDDCDCCONVERTER
Official product page: https://pim.murata.com/en-us/pim/details/?partNum=MYBSP0055AABFT

Metadata Review

Table

Field	Project value	Datasheet / official value	Assessment
MPN	MYBSP0055AABFT	MYBSP0055AABFT	Match
Manufacturer	Murata	Murata Manufacturing / Murata Power Solutions	Match
Description	Isolated PoE module DC-DC converter, 5 V 5.1 A, 37–57 V input	Isolated regulated DC-DC converter for PoE PD, IEEE 802.3at Class 4	Match
Package	Module	7-SMD surface-mount module	Functionally correct but too generic
Pin count	7	7	Match
Part Type	Integrated Circuits	Isolated DC-DC power module	Too generic / weak classification
Designator prefix	PS	Power-supply module	Appropriate

Key Specifications

Table

Parameter	Official value
Input voltage, nominal	48 VDC
Operating input range	37–57 VDC
Input transient maximum	60 VDC for 100 ms maximum
Output	5 VDC, 5.1 A maximum
Output power	25.5 W maximum
Output tolerance/range	4.85–5.15 VDC
Efficiency	88% minimum, 90.5% typical
Ripple/noise	150 mVp-p maximum
Isolation	2250 VDC input-to-output
Operating temperature	−40°C to +85°C
Storage temperature	−40°C to +90°C
Switching frequency	220 kHz
PoE support	IEEE 802.3at Class 4
Body dimensions	35.5 ±0.5 × 22.4 ±0.5 × 10.55 ±0.6 mm
Mounting	Surface mount, 7 terminals

Symbol and Pin Cross-Check

Table

Pin	Project name	Official function	Number/name match	Metadata issue
1	+VIN	Positive input voltage	Yes	Pin Type is Unspecified; no Pin Description
2	DEN	Detection and enable	Yes	Pin Type is Unspecified; no Pin Description
3	T2P	Type-2 PSE indicator	Yes	Pin Type is Unspecified; no Pin Description
4	VC	Controller voltage	Yes	Pin Type is Unspecified; no Pin Description
5	−VIN	Negative input voltage	Yes	Pin Type is Unspecified; no Pin Description
6	−VOUT	Negative output voltage	Yes	Pin Type is Unspecified; no Pin Description
7	+VOUT	Positive output voltage	Yes	Pin Type is Unspecified; no Pin Description

The symbol has the correct seven pins, numbering, names, and sensible primary-side-left / isolated-output-right organization. No pin-number swap was found.

Footprint Cross-Check

Matching details

Seven SMD pads are present and mapped to pins 1–7.
Pad size is 2.2 × 2.8 mm, matching the Murata recommended land pattern.
Primary-side pad X coordinate is approximately −15.22 mm and secondary-side pad X coordinate is +15.22 mm, matching the drawing’s approximately 30.44 mm row separation.
Key Y coordinates/pitches match the recommended pattern: ±7.62 mm, 3.0 mm pitch for pins 3–5, and the special pin-2 offset.
Body outline is 35.5 × 22.4 mm, matching the nominal package dimensions.
A pin-1 marker is present.
A 3D STEP model is attached.

Mismatches / risks

Isolation/placement keepout is not encoded. Murata’s recommended footprint includes an isolation-barrier keepout and layout cautions, including not placing components under the module. The current footprint only contains body, silkscreen, courtyard, pads, and model; it does not contain a dedicated keepout geometry.
Primary-side copper guidance is not encoded. The datasheet includes primary-side pattern restrictions/ground guidance. These are not represented as PCB rules in the footprint.
Package metadata is underspecified. “Module” should ideally identify the package as a 7-SMD surface-mount module, 35.5 × 22.4 mm.
Pin electrical metadata is incomplete. Every terminal has Pin Type: Unspecified and lacks a human-readable Pin Description. This does not change physical connectivity but weakens ERC, search, and downstream documentation.
Part classification is broad. Part Type: Integrated Circuits is not wrong at a high level, but “Isolated DC-DC Converter Module” or “Power Module” would be more precise.

Overall Verdict

Electrical identity, pinout, pad count, pad dimensions, and nominal footprint coordinates match the official Murata datasheet. The part is usable, but it should be treated as mechanically incomplete until the datasheet’s isolation/under-module keepout guidance is represented in the footprint or enforced at board level. The most important functional metadata improvement is adding pin descriptions and appropriate electrical pin types.

Result
Metadata Review
Key Specifications
Symbol and Pin Cross-Check
Footprint Cross-Check
Matching details
Mismatches / risks
Overall Verdict