Part Verification and Audit

flux

Part review summary
I reviewed the current part project for HF49FD/005-1H11TF, checked the existing project metadata, inspected the symbol terminals and footprint pads, and cross-checked them against the official Hongfa datasheet. For part-project verification, the datasheet should be treated as the source of truth and the terminal count/pin numbers should match it exactly
Current project metadata

Table

FieldCurrent valueAssessment
Manufacturer Part NumberHF49FD/005-1H11TFLooks correct
Manufacturer NameHongfaLooks correct
Datasheet URLhttps://www.hongfa.com/en/Product/Item/HF49FDPresent, official product page
MountPCBConsistent
Designator PrefixKCorrect for relay use
Part TypeElectromechanical ComponentsValid but generic
Package / Case CodeMissingNeeds completion
Operating VoltageMissingNot populated
Max CurrentMissingNot populated
Operating TemperatureMissingNot populated
Implementation DetailsMissingNot populated
I did not update the Datasheet property because it was already set. The current value points to an official Hongfa page, so your “only if missing” condition was not triggered.
Official datasheet source I verified
From Hongfa’s official product page, the underlying datasheet PDF resolves to:
  • https://source.hongfa.com/Uploads/Product/PDF/HF49FD_en.pdf?timestamp=1772732549
That means your current Datasheet URL is official, but it points to the product page rather than the direct PDF.
Key specs confirmed from the datasheet

Table

SpecDatasheet value
Relay familyHF49FD
TypeMiniature power relay
Contact form1 Form A / SPST-NO
Coil power0.36 W
Nominal coil voltage options3, 5, 6, 9, 12, 24 VDC
Max switching voltage125 VAC / 60 VDC
Max switching current2 A
Max switching power60 W / 62.5 VA non-gold, 30 W / 37.5 VA gold
Ambient temperature-40 C to 85 C
Mechanical life1 x 10^7 operations
Electrical life1 x 10^5 operations
Dielectric strength1.5 kV coil-to-contact
Body size20 x 5 x 12.5 mm
Symbol and pin audit What exists now
Your current symbol has 4 terminal components:

Table

TerminalCurrent pin numberCurrent pin typePin description
COM1UnspecifiedMissing
NO2UnspecifiedMissing
COIL_13UnspecifiedMissing
COIL_24UnspecifiedMissing
What the datasheet says
The datasheet bottom-view wiring diagram identifies:

Table

Datasheet pin numberFunction
1Coil
5Coil
3COM
4NO
Mismatches found

Table

ItemCurrent projectDatasheetResult
Pin count4 terminals4 terminalsCount matches
COM pin number13Mismatch
NO pin number24Mismatch
COIL_1 pin number31 or 5Mismatch
COIL_2 pin number41 or 5Mismatch
Pin type fieldsAll UnspecifiedCoil/contact roles knownMismatch
Pin description fieldsAll missingShould describe coil/common/NOMissing
Footprint audit What matches
  • The footprint has 4 pads, which is consistent with the relay having 4 terminals.
What I could not fully verify
The datasheet shows two PCB layout variants:
  • Version 1: 5.08 mm, 10.16 mm, 2.54 mm
  • Version 2: 7.62 mm, 7.62 mm, 2.54 mm
The current footprint data exposed to me only shows pad names for COM, NO, COIL_1, and COIL_2. It did not expose enough geometric detail for me to confirm whether your footprint matches version 1 or version 2.
Footprint concern
Because the symbol pin numbers are currently wrong, the footprint pin mapping is also at risk even if the pad spacing is correct. The main issue is not the pad count; it is the terminal numbering/map.
Recommended fixes High priority
  • Renumber terminals to match the datasheet:
  • Set pin types:
  • Add pin descriptions:
Medium priority
  • Refine Part Type from generic Electromechanical Components to Relay
  • Add Package or Case Code
  • Add Max Current = 2 A
  • Add Operating Temperature = -40 C to +85 C
  • Optionally replace the current Datasheet URL with the direct official PDF URL for cleaner downstream extraction
Bottom line
  • Good: MPN, manufacturer, datasheet presence, designator prefix, and 4-terminal count are all basically aligned.
  • Bad: The symbol pin numbering is incorrect versus the datasheet, and all pin types/descriptions are still missing.
  • Unverified: I could not conclusively prove whether the footprint geometry matches datasheet layout version 1 or version 2 with the data exposed from the current layout.
If you want, I can fix the terminal numbering, pin types, pin descriptions, and tidy the missing project properties next.
Fix all mismatches
Update datasheet URLs
Check missing footprints
Create review note
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Documents

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    Assets

    stp

    HF49FD_005-1H11TF

    HF49FD_005-1H11TF.stp3D Model
    kicad_mod

    HF49FD_005-1H11TF

    HF49FD0051H11TF.kicad_modFootprint
    HF49FD005-1H11TF-thumb.png

    HF49FD005-1H11TF-thumb.png

    HF49FD005-1H11TF-thumbThumbnail
    HF49FD_005-1H11TF

    HF49FD_005-1H11TF

    HF49FD_005-1H11TF Symbol.svgDefault

    HF49FD/005-1H11TF

    HF49FD/005-1H11TF thumbnail
    Hongfa Europe GMBH PCB Mount Power Relay, 5V dc Coil, 5A Switching Current, SPS The HF49FD/005-1H11TF is part of the Hongfa HF49FD series, which consists of compact, high-sensitivity power relays. It operates using a 5 V DC coil and provides electrical isolation between the control circuit and the load, allowing low-power signals (e.g., from a microcontroller) to switch higher voltages or currents. Key Characteristics Type: Electromagnetic relay (non-latching) Contact Configuration: SPST-NO (1 Form A, normally open) Coil Voltage: 5 V DC Switching Current: up to 5 A Switching Voltage: 250 VAC 30 VDC Mounting Type: Through-hole / PCB mount Size: ~20 × 5 × 12.5 mm (slim design) Coil Power Consumption: ~120 mW (low power) Dielectric Strength: up to 3 kV isolation Functional Overview Uses a coil + mechanical contacts: When 5 V is applied → coil energizes → contacts close When removed → contacts open Provides electrical isolation between: control side (low voltage) load side (higher voltage/current) #Relay

    Properties

    HF49FD/005-1H11TF

    Hongfa

    Relay

    source.hongfa.com//pdf/web/viewer.html?file=/Uploads/Product/PDF/HF49FD_en.pdf?timestamp=1743412019

    K

    PCB

    creativecommons.org/licenses/by/4.0/

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