J30J Connector Family Compared: Standard, J30JV2, J30JA, HJ30J, KJ30J, Mixed-Current, J30JZ, J30JY, RF Mixed

The metal-shell workhorse of the family and the direct Chinese equivalent of the MIL-DTL-83513 Micro-D (Glenair MWDM / ITT MDM), so it drops into designs originally specced against the US standard. It uses twist-pin contacts on a 1.27 × 1.1 mm grid, carries 3 A per contact, and scales from 9 to 100 positions (high-density catalogs reach 144). Pick it when you need a proven, general-purpose signal interconnect and may later want non-magnetic, sealed, or filtered variants from the same outline. For the full J30J Micro-D landscape and file downloads, see our J30J Micro-D Connectors, and for the underlying specs our guide to Chinese rectangular connector standards (GJB).

Keeps the same 1.27 × 1.1 mm contact grid and 3 A rating, but swaps the metal shell for a PPS plastic body with a fixed (non-removable) locking assembly. The result is lighter and cheaper, with a smaller 9–51 position range. It is the right call when weight and cost matter more than full metal-shell ruggedness — weight-sensitive modules, high-volume builds, or enclosures already environmentally protected. It is not a drop-in for a metal-shell J30J if your spec demands shielding or the widest pin counts.

Same J30J outline and 3 A rating, but adds a quick-lock (fast-insertion) coupling and often a built-in shield-cable clamp and braid. Contact counts run 9–100 (some catalogs to 144). Choose it when field assembly speed or frequent mating matters, or when you need the shielded-cable option, while still keeping the standard Micro-D signal footprint. It intermates with standard J30J / MDM boards.

Where the family turns to high-speed signaling. A metal shield shell on a symmetric 1.27 × 1.27 mm grid holds characteristic impedance at 100 ± 15 Ω and sustains a 1.65 Gbps data rate (up to 3.125 Gbps board-to-board) with near-end crosstalk better than 30 dB within 100 ps. Rated 3 A per contact across 7 shell sizes (12 / 18 / 24 / 30 / 36 / 55 / 100 positions). Built for differential pairs, LVDS, and other controlled-impedance links inside chassis and cabinets. Choose it when signal integrity — not just pin count — is the constraint.

The faster sibling of HJ30J. A single differential channel reaches 10 Gbps, characteristic impedance 100 ± 10 Ω, insertion loss below 3 dB at 5 GHz, and near-/far-end crosstalk below −30 dB at 5 GHz. Rated 3 A, with screw- or bayonet-lock and three termination styles (straight / right-angle PCB press-fit, and wire solder), it supports USB 3.0, DisplayPort, DVI, and HDMI over matched cable. Use it when HJ30J’s 1.65 Gbps ceiling is not enough but you still want the Micro-D envelope.

Breaks the 3 A ceiling by fitting 20 A power contacts alongside 3 A signal contacts in one metal shell. It offers 19 contact arrangements: nine all-high-current (2 to 10 × 20 A) and ten mixed (for example 7 × 3 A + 2 × 20 A, up to 37 × 3 A + 2 × 20 A). Signal wire is 0.1–0.15 mm², power wire 2.0–3.0 mm². One connector replaces a separate power connector and a signal connector — less space, fewer parts, simpler assembly. It is the natural choice whenever a module needs both control/signal lines and a power feed in a tight envelope. For a deep dive, see our J30J mixed-current connector selection guide, or browse J30J mixed-current (combo micro-d) connector products.

Metal shell, but trimmed: roughly 40% of the standard J30J volume (length −5 mm, width −2.9 mm, height −2 mm) while keeping the 1.27 × 1.1 mm grid, 3 A rating, and 9 / 15 / 21 / 25 / 31 / 37 / 51 / 66 / 74 / 100 positions. It uses low-insertion-force twist-pin contacts for long mechanical life. Choose it when board real estate is the constraint and you still need the Micro-D signal format — dense electronics, handheld, or space-limited modules.

Built on the J30J platform with enhanced environmental sealing for humid or outdoor exposure. Same 1.27 × 1.1 mm grid and 3 A, 9–100 positions, but rated for humidity up to 98% at +40 °C, salt spray 96 h, and it passes GJB 150.8 rain and drip tests with no visible water inside the mated cavity afterward. For pneumatic/electrical systems whose connectors sit exposed to weather — outdoor sensors, field equipment, vehicle- or mast-mounted gear.

Combines RF (coaxial) contacts with standard 3 A signal contacts in a single J30J outline, so a control harness and an RF feed share one connector and one panel cutout. Use it where a module needs both high-frequency lines (antenna, sensor, or transceiver) and low-speed control/signal without running two separate connectors. It keeps the same Micro-D mounting and pin-density advantages while consolidating the interconnect.