Part Information Review and Mismatch Check
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Here is the full execution of your 4 requested steps.
Step 1 — Review available part information from this project
- Part: TQ2-L2-4.5V
- Manufacturer: Panasonic
- Description: Flat, 5 mm 2 Form C, 2 A, relays
- Designator prefix: K
- Datasheet: https://industry.panasonic.com/ac/cdn/e/control/relay/signal/catalog/mech_eng_tq.pdf
- Schematic symbol pins present: 10 total
Schematic terminals and pin numbers (as defined in this project)
Footprint present in project
- Asset: KiCad footprint “TQ2L245V.kicad_mod”
- Pads (through-hole) count: 10, arranged 5 x 2
- Pad coordinates: 1–5 at y=0.00 mm; 6–10 at y=−7.62 mm; x-spacing 0, 2.54, 5.08, 7.62, 10.16 mm
- Drill size: 1.0 mm
Step 2 — Datasheet URL check and action
- Datasheet URL already set on the part. No web search or property update needed.
Step 3 — Datasheet scan and metadata extraction (Panasonic TQ series catalog, TQ2-L2-4.5V)
Features
- Three terminal styles: PC board terminal (standard/self-clinching), surface-mount terminal
- Conforms to FCC Part 68: surge withstand 1,500 V (between open contacts)
- M.B.B. contact available
- SMD types conform to JIS C0806
Part numbering / type
- TQ2-L2-4.5V = TQ series, “2” = 2 Form C, “L2” = 2-coil latching, “4.5V” coil
- DC coil voltages offered: 1.5 (SMD only), 3, 4.5, 5, 6, 9, 12, 24, 48 V (48 V only single side stable)
Contact ratings and switching capacity
- Contact arrangement: 2 Form C
- Contact rating (resistive): 2 A 30 V DC, 0.5 A 125 V AC
- Max. switching voltage: 220 V DC, 125 V AC
- Max. switching current: 2 A (DC/AC)
Coil (2-coil latching), 4.5 V nominal
- Set voltage (20°C): ≤ 75% of nominal
- Reset voltage (20°C): ≤ 75% of nominal
- Nominal operating current (20°C): Set coil 44.4 mA; Reset coil 44.4 mA
- Coil resistance (±10%, 20°C): Set 101.2 Ω; Reset 101.2 Ω
- Nominal operating power: 200 mW (each coil)
- Max. applied voltage (20°C): 150% of nominal
Insulation / dielectric (from catalog)
- Insulation/dielectric specifications are present in the catalog, but portions of the PDF intermittently failed to fetch; recommend confirming exact dielectric test voltages on the PDF page if needed for compliance documentation.
Life and timing
- Mechanical life: Min. 100 × 10^6 operations (180 ops/min)
- Electrical life (2 Form C, resistive, 20 ops/min): typical entries include 1 A 30 V DC ≥ 200 × 10^3 ops; 2 A 30 V DC ≥ 100 × 10^3 ops; 0.5 A 125 V AC ≥ 100 × 10^3 ops
- Latching timing sections (operate/reset) present in catalog
Environmental
- Ambient operating temperature: −40 to +85 °C (over 70 °C: Max. 1 A)
Package dimensions and PCB pattern (through-hole)
- Recommended PC board pattern (bottom view): 2.54 mm pin pitch, 7.62 mm row spacing, 10 holes, φ1.0 mm, tolerance ±0.1 mm
- Dimensions drawing is in the catalog (fetch intermittently failed); headline series height is 5 mm
Terminal arrangement and internal connections (bottom view)
- 2-coil latching (Reset) polarity marks at pins: 1 = +, 6 = −, 7 = +, 10 = −
- Contact-to-pin mapping (PC board terminal style):
- COM1 → pin 2
- NO1 → pin 3
- NC1 → pin 4
- COM2 → pin 9
- NO2 → pin 8
- NC2 → pin 7
Step 4 — Cross-check symbol and footprint against the datasheet
Symbol-to-datasheet mapping check (by pin number)
Table
| Pin | Project symbol | Datasheet function | Match |
|---|---|---|---|
| 1 | COIL_ | Coil + (latching coil, polarity +) | OK |
| 2 | NC_1 | COM1 | MISMATCH (project labels NC1; should be COM1) |
| 3 | COM_1 | NO1 | MISMATCH (project labels COM1; should be NO1) |
| 4 | NO_1 | NC1 | MISMATCH (project labels NO1; should be NC1) |
| 5 | COIL-_1 | Contact row (not a coil pin) | MISMATCH (project labels coil −; datasheet shows coil − at pin 6/10) |
| 6 | COIL-_2 | Coil − (paired with pin 1) | POLARITY/FUNCTION MISMATCH in name (this is coil − for the pin‑1 coil; project labels it as coil 2 −) |
| 7 | NO_2 | NC2 | MISMATCH (project labels NO2; should be NC2) |
| 8 | COM_2 | NO2 | MISMATCH (project labels COM2; should be NO2) |
| 9 | NC_2 | COM2 | MISMATCH (project labels NC2; should be COM2) |
| 10 | COIL | Coil − (polarity − for the second coil) | MISMATCH (project labels +; datasheet shows −) |
Symbol issues to fix (functional risks)
- Contact function mapping is rotated for both poles:
- Pins 2–4 should be COM1–NO1–NC1 (project has NC1–COM1–NO1).
- Pins 7–9 should be NC2–NO2–COM2 (project has NO2–COM2–NC2).
- Coil polarity and identification:
- Pin 1 is correctly “+”; its paired “−” is pin 6. The project has COIL-_1 on pin 5 and COIL-_2 on pin 6, implying the wrong coil assignment.
- Pin 10 should be coil “−” (for the other coil), but the project labels COIL there.
- The naming COIL_ vs COIL is ambiguous; prefer explicit “SET+ / SET− / RESET+ / RESET−” or “COIL1+/−, COIL2+/−” per datasheet polarity marks.
Footprint check against datasheet PCB pattern
- Pin count: 10 — matches.
- Grid: 2.54 mm pitch across each row — matches.
- Row spacing: 7.62 mm — matches.
- Drill: 1.0 mm — matches recommended φ1.0 mm holes.
- Footprint outline present and consistent with recommended keepouts (from KiCad mod). No obvious footprint dimension red flags detected.
Summary of risks
- The current symbol pin mapping and coil polarity labeling do not match the datasheet. As-is, this will cause incorrect wiring and functional failure on the assembled board, even though the physical footprint geometry matches the recommended land pattern.
- Footprint geometry aligns with the datasheet pattern (pitch, row spacing, drill), so manufacturing fit is likely OK; the critical issue is the symbol pin/function mapping.
Would you like me to correct the symbol pin assignments and coil naming in this part project to match the datasheet mapping exactly (pins 2–4 = COM1/NO1/NC1; pins 7–9 = NC2/NO2/COM2; coil polarities at 1/6 and 7/10 with clear coil identifiers)?
Fix pin mapping now
Show mismatched pins list
Verify footprint drill/pitch
Pull exact dielectric specs
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