Part Review and Datasheet Update
Thought for 6 sec
I’ll review the part metadata, find and set the official datasheet if needed, then compare symbol pins, footprint/pads, and pin descriptions against the datasheet before summarizing mismatches.
Worked for 3 mins 43 sec
I found an existing Mean Well datasheet property, but the stored productPdf URL returned 404 when scraped; the datasheet index resolves to the official direct PDF at meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF. I’m using that official PDF for the cross-check.
Worked for 1 min 5 sec
Completed the part review and saved the detailed findings in IRM-45-12 Part Review.
Open items:
- The existing datasheet URL was present but appears fragile/404 via scrape; the official direct PDF is
https://www.meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF. - Main mismatch risk: footprint pad positions/sizes appear scaled incorrectly in computed layout rules, and drill diameters weren’t visible for verification.
Suggested next steps:
- Update the Datasheet URL to the direct Mean Well PDF.
- Fix/verify footprint pad scaling and through-hole drill sizes.
- Add explicit pin descriptions for +V, -V, AC/L, and AC/N.
Fix and verify part
Fix identified mismatches
Update datasheet URL
Add pin descriptions
Run design checks
Refine this doc
Ask about this doc
IRM-45-12 Part Review
Part metadata found in Flux
- Project / part:
IRM-45-12 - Published as part: yes
- Part UID:
e88173b7-9edd-4538-b650-746617138ab5 - Manufacturer Name: Mean Well
- Manufacturer Part Number: IRM-45-12
- Description: Mean Well 45.6W Encapsulated Switch Mode Power Supply, 0–3.8A, 12V dc
- Part Type: Electromechanical Components
- Designator Prefix: PS
- Datasheet URL property currently set:
https://www.meanwell.com/productPdf.aspx?i=685#1 - Official PDF resolved/used for review:
https://www.meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF
Note: the existing
productPdf.aspx?i=685#1 datasheet URL was already present, so the “set URL if missing” condition did not apply. However, scraping that URL returned HTTP 404 for /productPdf.asp; the datasheet query resolved the official direct Mean Well PDF above.Datasheet source
- Manufacturer: Mean Well
- Datasheet: IRM-45 series, file name
IRM-45-SPEC, dated 2025-11-21 - Source: official Mean Well PDF at
https://www.meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF
Key datasheet specs for IRM-45-12
Table
| Spec | Datasheet value |
|---|---|
| Output voltage | 12 V DC |
| Rated output current | 3.8 A |
| Output current range | 0–3.8 A |
| Rated output power | 45.6 W |
| Ripple/noise | 150 mVp-p max |
| Output voltage tolerance | ±2.5% |
| Line regulation | ±0.5% |
| Load regulation | ±1.0% |
| Input voltage range | 85–305 VAC |
| Input frequency | 47–440 Hz |
| Typical efficiency | 87.5% |
| Typical AC current | 1.5 A at 115 VAC; 0.9 A at 230 VAC; 0.75 A at 277 VAC |
| Typical inrush current | Cold start 30 A at 115 VAC; 60 A at 230 VAC |
| Leakage current | <0.25 mA at 277 VAC |
| Overload protection | 115–160% rated power, hiccup, auto-recovery |
| Over-voltage protection | 12.6–16.2 V, shutoff/clamped by zener diode |
| Operating temperature | -30 to +85 °C, derating applies |
| Withstand voltage | I/P–O/P: 4.2 kVAC |
| Isolation resistance | I/P–O/P: 100 MΩ at 500 VDC, 25 °C, 70% RH |
| MTBF | 6451.1k h min Telcordia SR-332; 1212.1k h min MIL-HDBK-217F at 25 °C |
Mechanical / footprint data from datasheet
PCB mounting style, case
IRM60:Table
| Item | Datasheet value |
|---|---|
| Body size | 87 × 52 × 29.5 mm |
| Body tolerance | ±1 mm |
| Lead length | 3.5 ± 1 mm |
| Pin labels shown | AC/L, AC/N, -V, +V |
| AC pin diameter | 1 mm dia. |
| Output pin diameter | 2 mm dia. |
| Horizontal pin-column spacing | 76 mm |
| Output-side vertical spacing, -V to +V | 5.5 mm |
| AC-side vertical spacing, AC/L to AC/N | 6.75 mm |
| Output-side vertical location shown | 40.75 mm from upper reference line |
Schematic symbol cross-check
The current symbol is implemented as four terminal components:
Table
| Flux designator | Flux pin number | Datasheet label | Result |
|---|---|---|---|
| +V | 1 | +V | OK |
| -V | 2 | -V | OK |
| AC/L | 3 | AC/L | OK |
| AC/N | 4 | AC/N | OK |
Observations:
- The datasheet does not provide numeric pin numbers; it labels pins by function in the bottom-view drawing.
- Flux-assigned pin numbers 1–4 are therefore local symbol numbering, not manufacturer pin numbers.
- Pin descriptions are currently mostly implicit via designator names; the terminal components show
Pin Type: Unspecifiedand no explicitPin Descriptionproperty.
Footprint cross-check
What matches
- Footprint silk/body outline appears to represent an 87 mm × 52 mm body, matching the datasheet nominal body size.
- Four pads exist with labels matching the datasheet terminal labels:
+V,-V,AC/L,AC/N. - Relative pin positions appear intended to match the datasheet: output pins separated by 5.5 mm, AC pins separated by 6.75 mm, AC side offset by 76 mm horizontally from output side.
Mismatches / risks
-
Pad size and coordinates appear scaled incorrectly in computed rules.
The layout tree reports pad positions and sizes as very small mm values:+V: position{x: 0, y: 0}, size{x: 0.0033, y: 0.0033}-V: position{x: 0, y: -0.0055}, size{x: 0.0033, y: 0.0033}AC/N: position{x: 0.076, y: -0.0345}, size{x: 0.0018, y: 0.0018}AC/L: position{x: 0.076, y: -0.04125}, size{x: 0.0018, y: 0.0018}
These values look like meter-to-millimeter scaling leakage:0.076mm likely represents intended76mm,0.0055mm likely intended5.5mm, and pad sizes0.0033/0.0018mm likely intended3.3/1.8mm. If the tool’s computed rules are authoritative, the pads are effectively microscopic and the footprint is not manufacturable. -
AC/output pad holes are not explicitly visible in the inspected rules.
The datasheet specifies 1 mm diameter AC pins and 2 mm diameter output pins. The footprint needs plated through-holes sized appropriately for those leads, typically with clearance over the lead diameter. The inspected pad rules only exposed overall pad sizes, not drill/hole diameters. -
Pin descriptions/types could be improved.
Current terminal properties havePin Type: Unspecified; explicit descriptions such as12 V DC output positive,12 V DC output negative,AC line input, andAC neutral inputwould reduce integration mistakes. -
Datasheet property URL may be fragile.
The current URL is a Mean Well productPdf endpoint that returned 404 in web scrape. The official direct PDF URL resolved by the datasheet system is more robust:https://www.meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF.
Recommended fixes
- Update the part-level Datasheet URL to the direct official PDF URL if possible:
https://www.meanwell.com/Upload/PDF/IRM-45/IRM-45-SPEC.PDF - Correct footprint pad coordinate scale if the computed rule values are truly in mm:
+Vat(0, 0)reference-Vat(0, -5.5 mm)relative to +V, depending on footprint origin convention- AC side at
x = 76 mm - AC/L and AC/N separated by
6.75 mm
- Verify/add correct through-hole drill diameters:
- AC pins: 1 mm lead diameter; choose drill with suitable clearance
- Output pins: 2 mm lead diameter; choose drill with suitable clearance
- Add explicit pin descriptions/types for all four terminals.
Part metadata found in Flux
Datasheet source
Key datasheet specs for IRM-45-12
Mechanical / footprint data from datasheet
Schematic symbol cross-check
Footprint cross-check
What matches
Mismatches / risks
Recommended fixes
