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• “325041” is not a complete printed-circuit board (PCB) assembly; it is Curtis Industries’ base number for a family of 0.325 in (8.26 mm) pitch barrier terminal-block connectors that are mounted on a PCB.
• Full orderable part numbers carry two additional dash-fields that define the circuit count and hardware options (e.g. 325041-10-0, 325041-24-0, etc.).
• Electrical rating: 15 A, 300 V rms, wire range 14-22 AWG, UL 94-V-0 polypropylene base, operating –40 °C … +105 °C.
• Typical use: power-entry or high-current field wiring on industrial, HVAC, audio, or instrumentation boards.
Nomenclature and part-number structure
• 325041-xx-x
– First field (325041): family / series (8.26 mm pitch, right-angle PC-pin, dual-barrier style).
– Second field (xx): circuit count 01…24.
– Third field (x): hardware option (0 = standard steel screws, 5 = plated brass screws, etc.).
Mechanical characteristics
• Pitch (center-to-center): 0.325 in (8.26 mm).
• Terminal screw: No. 6-32, torque 7 lbf·in typ.
• PCB termination: 0.040 × 0.020 in (1.02 × 0.51 mm) rectangular pins, tin-plated, right-angle, recommended through-hole Ø1.4 mm.
• Stackable in multiples of three circuits; end plates available for odd quantities.
• Height above board ~17 mm; depth behind board ~11 mm (verify in datasheet for your exact dash-code).
Electrical / environmental ratings (per UL & CSA files)
• Voltage: 300 VAC/DC.
• Current: 15 A (single-pole), derate 20 % per adjacent loaded pole for continuous service.
• Insulation resistance: ≥500 MΩ @ 500 V DC.
• Dielectric with-stand: 1500 VAC for 1 min.
• Operating temperature –40 °C … +105 °C.
PCB footprint guidelines
• Row of PTH pads on 8.26 mm grid; 2.54 mm keep-out around screw heads.
• Optional mounting hole Ø3.2 mm for mechanical screw if high-vibration environment.
• For wave soldering, place on board edge to minimize shadowing; for reflow, hand-solder or selective-wave only (thermoplastic base not reflow-rated).
Compliance & safety
• UL E62622, CSA LR23335 recognized as a field-wireable terminal block.
• Meets ROHS‐3 and REACH (no SVHC > 0.1 %) when ordered with “-L” lead-free option.
Typical applications
• Mains input or distributed low-voltage power on industrial controls.
• HVAC blower boards, furnace ignition modules.
• Power amplifiers and pro-audio cross-over networks.
• Lab equipment or test fixtures requiring frequent disconnection.
How to select the correct variant
• Count the number of independent circuits you need (n). Choose 325041-nn-0 or nearest higher multiple and leave unused positions blank if necessary.
• Check creepage/clearance vs. system voltage—8.26 mm pitch is adequate up to 300 V category II; choose the 0.437 in family if greater spacing needed.
• Confirm screw material: std “-0” (zinc-plated steel) or “-5” (nickel-plated brass) for corrosion resistance.
• Verify distributor stock—many dash-codes are non-stock and carry 10- to 16-week MLF. Digi-Key and Mouser usually keep 01-, 05-, 10-, 12- and 24-circuit versions.
Possible confusion with appliance PCBs
• A few GE/Hotpoint refrigerator control boards carry an internal bare-board etch number “325041”. Those assemblies are serviced under part -WR55X10942- and are unrelated to the Curtis connector. Always cross-check the context (board silkscreen vs. molded connector housing).
• Pluggable Euro-style terminal blocks (e.g., Phoenix Contact COMBICON) are increasingly replacing fixed barrier strips because they allow blind-mate wiring and faster field service.
• Push-in spring terminals rated 600 V/16 A are now available in the same 8.25 mm pitch—consider them when vibration or tool-less maintenance is important.
• IPC/WHMA-A-620D now recommends specifying torque or pull-test data in documentation; Curtis publishes 7 lbf·in (0.8 N·m) for this series.
Barrier strips isolate each conductor with molded walls, reducing the possibility of whisker shorts or tool-slip. The 8.26 mm spacing corresponds to ^(13/40) in—an old ICE standard chosen so that 24-circuit units are almost exactly 8 inches long.
• When used on equipment connected to mains, designer must provide strain-relief for field wiring (UL 508A §28).
• Observe creepage/clearance per IEC 60950-1 or IEC 62368-1 depending on end-equipment category.
• Proper torque documentation protects manufacturers against warranty or safety claims.
• Long-lead-time: small dash-codes often built-to-order; consider alternate suppliers such as TE Connectivity Buchanan, Cinch 170 series, or Wago 236 if production window is tight.
• The series is not suitable for SMT. If full SMT is required, look at hybrid “through-hole reflow (THR)” terminal blocks.
• Examine IEC 60664-1 for creepage rules—may drive selection of a larger pitch in high-pollution environments.
• Investigate pluggable lever-actuated terminals (Wago 2600 series) for tool-less field wiring.
• Follow IPC-2221B for updated land-pattern guidelines, especially for high-current traces feeding the barrier strip.
“PCB 325041” almost certainly points to Curtis Industries’ 0.325-inch-pitch barrier terminal-block family, not to an entire circuit board. Choose the correct dash-suffix for your circuit count, verify ratings (15 A, 300 V, 14-22 AWG), and follow the datasheet footprints. If you instead have an appliance control board with the same numeric imprint, reference the appliance maker’s service PN (e.g., GE WR55X10942) because the two are unrelated.
