Part Information Review and Mismatch Check

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5:23

Project
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PCB Layout
Schematic

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Checking.

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Analy.

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Using PCB Layout Tool.

Looking for "Features list for TQ2 series relays" in mech_eng_tq.pdf

Looking for "Part numbering system and types including TQ2-L2 and coil voltage options" in mech_eng_tq.pdf

Looking for "Contact arrangement and rating (2 Form C, 2 A) for TQ2 series" in mech_eng_tq.pdf

Looking for "Coil data for latching dual coil type 4.5 V nominal voltage" in mech_eng_tq.pdf

Looking for "Must operate voltage and must release voltage for TQ2-L2-4.5V" in mech_eng_tq.pdf

Looking for "Nominal operating power for latching type TQ2 series" in mech_eng_tq.pdf

Looking for "Maximum switching voltage and maximum switching current for TQ2 series" in mech_eng_tq.pdf

Looking for "Minimum switching load for TQ2 series" in mech_eng_tq.pdf

Looking for "Insulation resistance and dielectric strength specifications" in mech_eng_tq.pdf

Looking for "Operate time and release time for latching type" in mech_eng_tq.pdf

Looking for "Electrical life and mechanical life ratings" in mech_eng_tq.pdf

Looking for "Ambient temperature operating range and storage temperature range" in mech_eng_tq.pdf

Looking for "Dimensions drawing for TQ2 package (mm) height 5 mm" in mech_eng_tq.pdf

Looking for "Terminal arrangement and internal connections (bottom view) for dual coil latching TQ2-L2" in mech_eng_tq.pdf

Looking for "Recommended PC board pattern (land pattern) for TQ2 through hole type" in mech_eng_tq.pdf

Looking for "Soldering conditions for through hole type" in mech_eng_tq.pdf

Looking for "Weight specification for TQ2 series" in mech_eng_tq.pdf

Looking for "Contact material and contact resistance spec" in mech_eng_tq.pdf

Looking for "Pin numbering for TQ2-L2 and mapping to COM, NO, NC, coil pins" in mech_eng_tq.pdf

Looking for "Dual coil latching terminal arrangement bottom view with polarity marks for coil pins for TQ2-L2 (pins 1,6,7,10 indicated +/−)" in mech_eng_tq.pdf

Looking for "Terminal numbering and contact assignment mapping COM1, NO1, NC1, COM2, NO2, NC2 to pin numbers for TQ2-L2" in mech_eng_tq.pdf

Here is the full execution of your 4 requested steps.
Step 1 — Review available part information from this project
Schematic terminals and pin numbers (as defined in this project)

Table

Terminal (project)Pin number
COIL_ 1
NC_12
COM_13
NO_14
COIL-_15
COIL-_26
NO_27
COM_28
NC_29
COIL 10
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

PinProject symbolDatasheet functionMatch
1COIL_ Coil + (latching coil, polarity +)OK
2NC_1COM1MISMATCH (project labels NC1; should be COM1)
3COM_1NO1MISMATCH (project labels COM1; should be NO1)
4NO_1NC1MISMATCH (project labels NO1; should be NC1)
5COIL-_1Contact row (not a coil pin)MISMATCH (project labels coil −; datasheet shows coil − at pin 6/10)
6COIL-_2Coil − (paired with pin 1)POLARITY/FUNCTION MISMATCH in name (this is coil − for the pin‑1 coil; project labels it as coil 2 −)
7NO_2NC2MISMATCH (project labels NO2; should be NC2)
8COM_2NO2MISMATCH (project labels COM2; should be NO2)
9NC_2COM2MISMATCH (project labels NC2; should be COM2)
10COIL 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
24 days

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TQ2-L2-4.5V thumbnail
Telecom Relay DPDT (2 Form C) Through Hole #Relay

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Assets

TQ2-L2-4.5V

TQ2-L2-4.5V

TQ2-L2-4.5V Symbol.svgDefault
kicad_mod

TQ2-L2-4.5V

TQ2L245V.kicad_modFootprint
TQ2-L2-4.5V

TQ2-L2-4.5V

TQ2-L2-4.5V.stp3D Model
TQ2-L2-4.5V-thumb.png

TQ2-L2-4.5V-thumb.png

TQ2-L2-4.5V-thumbThumbnail

Controls