Engineering Tools for Connector Design
Quick calculators and look-ups for the everyday questions that come up while choosing and designing connectors. They run in your browser — nothing you type is sent to us.
Look-up & selection 5
Connector Type Finder
Answer two questions about what you are connecting and get the matching product families to start from.
Open tool →Batch Cross-Reference Search
Paste a list of part numbers, get verified LTconnector alternatives and identified manufacturer parts back in one table, and export it.
Open tool →Manufacturer Part-Number Lookup
Type a TE, Molex, Hirose, JAE, I-PEX, Rosenberger or other manufacturer part number and jump to the matching connector series.
Open tool →Parametric Selector & Compare
Filter LTconnector parts by pitch, positions, height, type, mounting and plating, then compare 2–4 side by side.
Open tool →Mating Pair & Stack-Height Finder
Find the mating plug / receptacle for a board-to-board part and its stack height, or find pairs for a required board gap.
Open tool →Electrical calculators 8
AWG Table & Ampacity Quick Reference
AWG ↔ mm² ↔ diameter ↔ resistance table with NEC 310.16 ampacity and temperature / bundling correction.
Open tool →Wire Gauge & Voltage-Drop Calculator
Conductor resistance, voltage drop and I²R power loss for a given AWG / mm² wire, length, current and temperature — including contact resistance.
Open tool →Ohm’s Law & Series/Parallel
Voltage, current, resistance and power from any two values; series and parallel resistance.
Open tool →PCB Trace Width & Current (IPC-2221)
Trace width for a current and temperature rise, or the current a trace carries, plus trace resistance and voltage drop.
Open tool →Current Derating vs Temperature
Derate a connector’s rated current for ambient temperature — the curve on the datasheet — with a table and chart.
Open tool →Contact Resistance & Temperature-Rise Estimator
I²R heating of a contact and an estimate of its temperature rise from the datasheet rating or a thermal resistance.
Open tool →Copper Resistance vs Temperature
Resistance of a copper conductor at another temperature, or the temperature from a resistance change.
Open tool →Battery Pack & Charging Calculator
Series / parallel pack voltage, capacity and energy, charge time, and AC / DC charging power.
Open tool →RF & high-speed 9
Transmission-Line Impedance Calculator
Microstrip, stripline, coax and differential-pair impedance from geometry, with propagation delay and a width solver.
Open tool →RF Converter: VSWR, Return Loss, Mismatch
Convert between VSWR, return loss, reflection coefficient and mismatch loss; dBm ↔ mW; wavelength in cable; simple link budget.
Open tool →RF Cascade: Mismatch Range & Cable-Loss Scaling
Worst- and best-case VSWR of connectors in series, and cable attenuation scaled to another frequency and length.
Open tool →Display Link Bandwidth & Lane Count
Pixel clock and data rate for a resolution, bit depth and refresh rate, the lanes needed, and LVDS lane rates.
Open tool →High-Speed Interface Reference
Per-lane rates, encoding and Nyquist frequency of PCIe, USB, Ethernet, SAS/SATA, DisplayPort and HDMI.
Open tool →Skin Depth & Plating Thickness
Skin depth of copper, silver, gold or aluminium versus frequency, and how plating thickness compares to it.
Open tool →Coax Cutoff Frequency (TE11)
Highest frequency before the first higher-order mode appears in a coaxial line or connector, from its dimensions.
Open tool →Data Rate, Bandwidth, Rise Time & Skew
Nyquist frequency for NRZ / PAM4 data rates, bandwidth ↔ rise time, and how much length mismatch a skew budget allows.
Open tool →dB, dBm & Path Loss Calculator
Ratio ↔ dB (power and voltage), dBm ↔ W ↔ dBµV, free-space path loss.
Open tool →Harness & assembly 3
Harness Checks: Crimp, Pull Force, Strip, Bend Radius
Pass / fail checks of measured crimp height, pull-out force, strip length and bend radius against the limits you enter.
Open tool →Wire Bundle, Conduit Fill & Heat-Shrink Sizing
Bundle diameter from wire count and OD, conduit fill percentage against the NEC limit, and heat-shrink size range.
Open tool →Mating Force Budget
Total insertion and extraction force from the per-contact values, compared with the limit you set.
Open tool →Reference 4
IP Code Decoder (IEC 60529)
Decode an IP rating such as IP67 or IP6K9K into what it protects against — solids and water.
Open tool →Unit, AWG & Contact-Span Converter
mm ↔ mil ↔ inch, AWG ↔ mm², and the contact span of a connector from its pitch and number of positions.
Open tool →Plating, Force, Torque & Temperature Units
µm ↔ µin plating, N ↔ gf ↔ lbf, N·m ↔ lbf·in, °C ↔ °F ↔ K, mm² ↔ circular mils.
Open tool →Plating Metal Mass & Cost
Mass and metal value of a plating layer from area, thickness and metal.
Open tool →No tool matches.
For preliminary assessment only — the final decision must follow the manufacturer’s datasheet and the applicable NEC / IEC / UL standards. Results are calculated from the standard formulas stated on this page and are for design estimates only. They are not a rating of any specific part — always confirm current, voltage, temperature and environment limits against the manufacturer’s datasheet for the part you intend to use.
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