Part Review Audit
Worked for 3 mins 40 sec
The Datasheet URL is already set and points to Hongfa’s official download endpoint, so I’m leaving it unchanged. I found a key ordering-code nuance around the optional “without pin 6” field and am checking it against the existing 4-pad footprint before summarizing.
Worked for 9 mins 7 sec
Created a project doc
Part Review — HF105F-1/012D-1HST
Date: 2026-07-22 Project / part name: HF105F-1_012D-1HST
Reviewed the part and created the full report here: Part Review — HF105F-1/012D-1HST. The Datasheet URL was already set and confirmed as Hongfa’s official endpoint, so I did not change it.
Open items flagged:
- Pin descriptions/types are missing or generic.
- Library metadata has inconsistent classification facets.
- Package/body size is only in the description, not an explicit package property.
- Footprint geometry looks consistent, but drill-hole rules should be verified before manufacturing.
Suggested next steps:
- Update terminal descriptions and pin types.
- Clean up part type/package metadata.
- Verify THT drill sizes in the footprint: Ø1.1 mm coil holes and Ø2.1 mm contact holes.
Fix metadata issues
Update terminal descriptions
Clean part metadata
Verify drill sizes
Run part review
Refine this doc
Ask about this doc
Part Review — HF105F-1/012D-1HST
Date: 2026-07-22
Part metadata reviewed
- Project / part name: HF105F-1_012D-1HST
- Manufacturer part number: HF105F-1/012D-1HST
- Manufacturer: Hongfa
- Description: Power Relay 12 VDC 40 A SPST-NO, 32.3 × 27.1 × 20 mm, THT
- Mount: Through hole
- Designator prefix: K
- Terminal count: 4
- Datasheet URL: https://source.hongfa.com//Api/DownloadPdf/254
The Datasheet URL was already present. I confirmed it points to Hongfa’s official
source.hongfa.com download endpoint for the HF105F-1 datasheet, so no property update was required.Datasheet identity and ordering-code check
Official Hongfa family: HF105F-1 miniature high-power relay.
MPN decode:
HF105F-1: 30 A class HF105F-1 relay family012: 12 V coilD: DC coil- no
6orTbetweenDand-1H: without 6# terminal, standard 2500 VAC coil-contact dielectric option 1H: 1 Form A / SPST-NOS: plastic sealedT: AgSnO2 contact material- no trailing
F: Class B insulation standard
Key datasheet specifications
- Relay type: non-latching electromechanical power relay
- Contact form: 1 Form A / SPST-NO
- Coil voltage: 12 VDC
- Coil resistance: 155 Ω ±10% at 23 °C
- Coil power: approx. 900 mW
- Pickup voltage: 9.0 VDC max at 23 °C
- Dropout voltage: 1.2 VDC min at 23 °C
- Maximum coil voltage: 15.6 VDC
- Contact material: AgSnO2
- Contact resistance: 50 mΩ max at 1 A, 24 VDC
- Rated / listed contact capability: SPST-NO 30 A class; datasheet family lists up to 40 A max switching current, with application caveats for long-time 40 A carry
- Max switching voltage: 277 VAC / 28 VDC
- Max switching capacity: up to 11080 VA / 1200 W for 1 Form A variants
- Insulation resistance: 1000 MΩ at 500 VDC
- Dielectric strength: 2500 VAC coil-contact for this nil option; 1500 VAC open contacts
- Operating temperature: -55 °C to +85 °C for DC coil type
- Operate / release time: 15 ms max operate, 10 ms max release
- Mechanical endurance: 1 × 10^7 operations
- Body size: 32.3 × 27.1 × 20.0 mm, approx. 36 g
Symbol / terminal review
Existing schematic uses four separate terminal objects:
Table
| Existing terminal designator | Existing pin number | Interpreted function |
|---|---|---|
| COIL_1 | 1 | Coil terminal |
| NO | 2 | Normally-open contact terminal |
| COM | 3 | Common / load contact terminal |
| COIL_2 | 4 | Coil terminal |
This mapping is consistent with common HF105F-1 4-pin SPST-NO pinout interpretation: coil on pins 1 and 4, switched contact on pins 2 and 3. The relay coil is non-polarized.
Footprint review
The part currently has four PCB pads only, matching the
HF105F-1/012D-1HST “without 6# terminal” option. No extra 6# terminal pad is present.Observed pad layout values correspond to common HF105F-1 footprint dimensions:
- coil pad spacing includes ~10.2 mm
- contact pad spacing includes ~17.8 mm
- contact offset includes ~3.8 mm / 14 mm style dimensions from the datasheet layout
- pad outer diameters appear to be about 1.65 mm for coil pins and 3.15 mm for contact pins, consistent with annular pads around approximately 1.1 mm and 2.1 mm recommended holes
Datasheet hole recommendations:
- coil terminals: 2 × Ø1.1 mm holes
- contact/load terminals: 2 × Ø2.1 mm holes
- PCB layout tolerance: ±0.1 mm unless otherwise indicated
Mismatches / issues flagged
-
Pin descriptions and pin types are incomplete.
The schematic terminal properties havePin Type: Unspecifiedand no explicitPin Descriptionproperties. Recommended descriptions:- Pin 1: Coil terminal
- Pin 2: Normally-open contact terminal
- Pin 3: Common / switched load contact terminal
- Pin 4: Coil terminal
-
Part type classification is broad / inconsistent in library facets.
Project property saysElectromechanical Components, which is reasonable, but library search facets classify it underIntegrated Circuitsand type-specific values show logic-like fields. This should be corrected to relay / electromechanical component metadata if publishing quality matters. -
Package property is not explicit.
The package/body size appears in the description, but there is no explicit package/case property found. Recommend adding a package-style property such asTHT relay, 32.3 × 27.1 × 20 mmif this part will be reused. -
Footprint drill/hole rules should be verified in the PCB editor before manufacturing.
The observed pad diameters match the datasheet-derived footprint, but the inspection output did not explicitly expose drill-hole rules for each pad. Before fabrication, verify the pads are true through-hole pads with Ø1.1 mm coil holes and Ø2.1 mm contact holes.
Overall assessment
The MPN, manufacturer, datasheet URL, four-terminal count, SPST-NO function, 12 V coil rating, and no-6#-terminal footprint concept are consistent with the official Hongfa HF105F-1 datasheet. The main publish-quality gaps are missing terminal descriptions/pin types, broad or inconsistent part classification metadata, absent explicit package property, and the need to verify actual drill-hole settings for the through-hole pads.
Part metadata reviewed
Datasheet identity and ordering-code check
Key datasheet specifications
Symbol / terminal review
Footprint review
Mismatches / issues flagged
Overall assessment
