Part Audit Datasheet Review
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T9GV1L14-12 Part Audit
Date: 2026-07-21 Reviewed available part metadata, schematic symbol terminal metadata, PCB footprint/pad geometry reported by Flux, and the ...
Completed the part audit and saved the detailed findings in T9GV1L14-12 Part Audit.
Open items:
- Datasheet URL was already set, so I did not overwrite it; however, the official TE URL is available and preferable.
- Main flags:
Package or Case Code = TOlooks misleading, all terminal pin types/descriptions are incomplete, terminal numbering is not confirmed by the datasheet extraction, and the footprint contact pad positions/unit scaling need verification before manufacturing.
Suggested next steps:
- Update the Datasheet URL to the official TE link if the part metadata editor permits it.
- Fix terminal pin types/descriptions.
- Manually verify or revise the footprint against the TE mechanical drawing, especially COM/N.O. pad locations.
Fix metadata and footprint
Update datasheet URL
Fix pin metadata
Verify footprint geometry
Run DRC/ERC
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T9GV1L14-12 Part Audit
Date: 2026-07-21
Scope
Reviewed available part metadata, schematic symbol terminal metadata, PCB footprint/pad geometry reported by Flux, and the available T9G datasheet content for TE Connectivity / Potter & Brumfield
T9GV1L14-12.Available Part Information
Table
| Field | Current value / observation | Datasheet/library cross-check |
|---|---|---|
| Manufacturer Part Number | T9GV1L14-12 | Matches datasheet ordering code. TE internal part number reported as 1558661-3. |
| Manufacturer | TE Connectivity | Matches Potter & Brumfield / TE Connectivity datasheet. |
| Description | General purpose power relay, DC, monostable, 1 Form A SPST-NO, 30 A contact rating, 12 VDC coil, Potter & Brumfield T9G, -40C to 105C | Consistent with datasheet. |
| Pin count | 4 | Plausible for 1 Form A single-throw model: two coil terminals plus two NO contact terminals. |
| Designator Prefix | K | Appropriate for a relay. |
| Part Type | Electromechanical Components | Not wrong, but broad. A more specific Relay classification would be preferable if supported. |
| Package or Case Code | TO | Likely misleading/wrong for a PCB power relay; TO normally implies transistor-style packages. |
| Datasheet URL | Current project metadata points to a stored PDF URL. Flux library search for this same UID reports the official TE URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=T9G&DocType=Data%20Sheet&DocLang=English&PartCntxt=1558661-3&DocFormat=pdf | A datasheet URL was already set, so no update was required by the request. For audit quality, the official TE URL is preferable to the storage mirror if the property can be edited. |
| Lifecycle | Flux library reports Active | No conflict found. |
Key Datasheet Specifications
- Series: Potter & Brumfield T9G Series DC coil 30 A PCB relay.
- Contact form: 1 Form A, normally open.
- Enclosure: flux-proof plastic case.
- Mounting/termination code:
1, PCB terminals for coil and contacts. - Contact material: AgSnO.
- Coil voltage: 12 VDC.
- Coil resistance: 160 ohm ±10% at 23°C.
- Rated coil power: 900 mW.
- Operate voltage: 9 VDC.
- Release voltage: 1.2 VDC.
- Rated contact voltage/current: 30 A class; datasheet includes 30 A at 250 VAC and 30 A 277 VAC general purpose at 85°C.
- Maximum switching voltage: 480 VAC.
- Minimum recommended contact load: 1 A, 12 VAC/VDC.
- Initial contact resistance: 300 mΩ at 100 mA / 6 VDC.
- Operate/release time max including bounce: 15 ms / 22 ms.
- Operating temperature: -40°C to +105°C, with reduced current where applicable.
- Dielectric strength: 1500 Vrms between open contacts, 4000 Vrms contact-to-coil.
- Surge withstand: 8 kV contact-to-coil.
- Insulation resistance: 1e9 ohm at 500 VDC.
- Clearance/creepage contact-to-coil: >6.4 mm / >8 mm.
- Mechanical endurance: 10e6 operations.
- Body dimensions, mounting code 1: 29 mm max length, 21.5 mm max width, 15.7 mm max height.
- Terminals: contact terminals 1.6 mm x 0.8 mm; coil terminals 0.5 mm x 0.5 mm.
- Recommended PCB holes: contact terminals Ø2.1 mm; coil terminals Ø1.1 mm.
Schematic Symbol / Terminal Metadata Review
Current terminal metadata:
Table
| Terminal | Current pin number | Current pin type | Current pin description | Review |
|---|---|---|---|---|
COIL_1 | 1 | Unspecified | Missing | Functionally plausible coil terminal, but metadata is incomplete. |
COIL_2 | 2 | Unspecified | Missing | Functionally plausible coil terminal, but metadata is incomplete. |
COM | 3 | Unspecified | Missing | Functionally plausible common contact terminal, but metadata is incomplete. |
N.O. | 4 | Unspecified | Missing | Functionally plausible normally-open contact terminal, but metadata is incomplete. |
Findings:
- The symbol exposes the expected four functional terminals for a 1 Form A relay: two coil terminals, common, and normally-open contact.
- The datasheet extraction did not find an explicit authoritative terminal-number mapping for pins 1, 2, 3, and 4. The current numbering may be acceptable as CAD-local numbering, but it should not be treated as confirmed TE terminal numbering until verified from the original drawing.
- All terminals use
Pin Type = Unspecifiedand lackPin Description. For a relay, these should ideally be Passive-style pins with descriptions such as:COIL_1: Relay coil terminal, 12 V nominal.COIL_2: Relay coil terminal, 12 V nominal.COM: Common movable contact terminal.N.O.: Normally-open contact terminal.
Footprint Review
Datasheet-derived footprint information for mounting/termination code 1:
- Coil holes: Ø1.1 mm.
- Contact holes: Ø2.1 mm.
- Coil hole spacing: 10.16 mm horizontally.
- Datasheet dimensions include horizontal references of 3.81 mm, 13.97 mm, and 17.78 mm, and vertical references of 7.62 mm, 12.70 mm, and 15.24 mm.
- The datasheet note says only necessary terminals are present on single-throw models; some holes in the generic drawing are unnecessary for single-throw variants.
Current footprint/pad data reported by layout inspection:
Table
| Pad | Reported position | Reported size | Shape | Review |
|---|---|---|---|---|
COIL_1 | (0, 0) | 0.00165 x 0.00165 | Rectangular | Coil spacing relative to COIL_2 appears to encode 10.16 mm if values are meter-scaled. Rectangular pin-1 marker is common but unverified. |
COIL_2 | (-0.01016, 0) | 0.00165 x 0.00165 | Circular | Coil geometry is likely plausible if values are meter-scaled. |
COM | (-0.01397, 0.0127) | 0.00315 x 0.00315 | Circular | Contact pad position does not clearly match the extracted datasheet coordinate set. |
N.O. | (0.00381, 0.01524) | 0.00315 x 0.00315 | Circular | Contact pad position does not clearly match the extracted datasheet coordinate set. |
Important footprint findings:
- The coordinate and size values appear meter-scaled despite the layout API reporting
unit: mm. For example,0.01016corresponds to 10.16 mm, and0.00315corresponds to 3.15 mm. If this is not an API display-unit quirk, the footprint pads would be 1000x too small. The rendered view did not provide enough pad visibility to dismiss this risk. - Coil pad spacing appears plausible when interpreted as 10.16 mm.
- Contact pad locations are not confidently verified. An independent review noted that, after aligning the coil holes to the datasheet-derived coordinate set, the contact pads appear displaced from the extracted expected positions. This may indicate a footprint for a different T9G variant, a misread drawing, or a Y-offset/contact-position error.
- The pad diameters, if interpreted as 1.65 mm for coil pads and 3.15 mm for contact pads, are plausible annular pads for Ø1.1 mm and Ø2.1 mm holes. If interpreted literally as millimeters from the API output, they are unusably small.
Mismatches / Flags
High-confidence flags:
Package or Case Code = TOis likely incorrect or misleading for this through-hole PCB relay.- Terminal pin types are all
Unspecifiedand pin descriptions are missing. - Pin numbers 1-4 are not confirmed by the datasheet extraction; the symbol’s functional names are plausible, but the numeric terminal mapping remains unverified.
- The project datasheet URL is a storage mirror, while an official TE URL is available from the Flux library search. Prefer the official TE URL if editable.
Footprint-risk flags:
- The pad coordinate units are ambiguous: the numeric values look meter-scaled while the API reports millimeters.
- Contact pad locations are not confidently matched to the datasheet-derived mounting code 1 footprint and should be verified against the official TE drawing before manufacturing.
- COM vs N.O. physical pad assignment cannot be confirmed from the extracted datasheet text alone.
Conclusion
The part identity and headline electrical specs are mostly consistent with the datasheet. The schematic symbol is functionally plausible for a 1 Form A relay, but it is under-described and the numeric pin mapping is unverified. The footprint requires manual verification against the official TE mechanical drawing before use, especially the contact pad positions and unit scaling.
Scope
Available Part Information
Key Datasheet Specifications
Schematic Symbol / Terminal Metadata Review
Footprint Review
Mismatches / Flags
Conclusion
