Top 10 Sullins Connector Solutions Parts Every Hardware Engineer Should Know

Why Sullins Connector Solutions

Sullins Connector Solutions (acquired by BEL — Bell Electrical Connectors in 2022) has been a quiet workhorse in the connector industry for decades. While TE, Molex, and Hirose dominate new designs, Sullins remains the go‑to for industrial control, test equipment, and telecom backplanes — especially when you need .100" (2.54 mm) pitch card edge connectors or low‑cost DIP sockets with short lead times. Their tooling is mature, and many parts are available from stock when larger suppliers are on extended lead times.

Here are ten Sullins product families worth keeping in your parts library.

1. GBC Series — General‑Purpose Card Edge Connectors

The GBC series is a dual‑readout (contacts on both sides of the PCB), .100" pitch card edge connector. Available in 6 to 50 positions per side. Used in ATX power cycling test fixtures, backplane adapters, and older PCI‑form‑factor applications.

Why you need it: GBC parts accept standard 1/16" (1.6 mm) PCBs and are available with dip solder, right‑angle, or wire‑wrap tails. If you need to make a test‑jig slot for a custom PCB, GBC is the cheapest off‑the‑shelf option. A customer recently asked us to build a test slot for a nonstandard carrier board — one of these parts did the job.

2. EBC Series — Extended Card Edge

The same .100" dual‑readout form factor, but with extended contact tails for thicker boards (up to 3/32", ~2.4 mm). Common in power distribution units and industrial PLC backplanes where the motherboard is heavier than standard. If your PCB stock is thicker than 1/16", check this series before assuming the standard card edge will fit.

3. PZC Series — .100" Square Post Headers

PZC series unshrouded male headers, available in single or dual row, 1 to 50 positions per row. Square posts (0.025" square) mate with standard female socket strips. Plating options: gold flash or 15–30 µ" gold over nickel.

Selection tip: For applications that see fewer than 10 mating cycles (internal wire‑to‑board connections), gold flash is sufficient. For connectors that get disconnected during field servicing (>50 cycles), spec 30 µ" gold to avoid fretting corrosion. A common mistake is using gold flash in high‑vibration environments — the soft gold layer wears through in <50 cycles and the exposed nickel corrodes.

4. NPB Series — Female Socket Strips

The mating counterpart to PZC headers. NPB series dual‑row, .100" pitch female sockets with precision machined or formed contacts. Open and closed frame variants available.

Layout note: The NPB's PCB footprint is symmetrical — you can accidentally rotate it 180° and miss the pin‑1 indicator. Always silkscreen a notch at the pin‑1 corner on the board top layer.

5. ICS Series — Open Frame DIP Sockets

ICS (Individual Contact Socket) series: solder‑tail DIP sockets from 6 to 64 pins. Open frame design allows airflow under the IC — important for power op‑amps and voltage regulators that dissipate heat through the leads. Tin or gold plating.

6. ICA Series — Closed Frame DIP Sockets

Same pin count range as ICS but with a closed insulator body. Offers better mechanical protection during handling and prevents solder wicking up into the contact area. Preferred for high‑reliability military/industrial boards where rework is rare.

7. BSN Series — Shorting Jumpers / Shunts

BSN‑series .100" pitch shunts (2‑position, 1‑pole). Available with gold or tin contacts, with or without a handle. Used for configuration jumpers on prototype boards and field‑selectable options.

Why BSN over generic: The handle design on BSN parts provides a positive grip — important when operators in production need to configure jumpers without tweezers. Generic flat shunts are ~$0.02 cheaper per piece but increase assembly time.

8. SMM Series — IDC Socket Connectors

SMM series insulation‑displacement connectors for 1.27 mm pitch ribbon cable. 10 to 64 positions, with strain‑relief options. When you need a quick debug header on a board, SMM‑to‑PZC is the standard interface.

9. ESD Series — Single Readout Edge Card

A single‑contact‑row version of the card edge connector. ESD‑series parts are ideal for low‑pin‑count expansion connectors (8–20 positions) where a dual‑row card edge would be oversized.

10. PC/104 Connector Series

Sullins produces connectors that meet the PC/104 and PC/104‑Plus specification — stacking bushings, shrouded headers, and mating connectors. Still widely used in industrial embedded systems where the PC/104 stack form factor provides mechanical rigidity without a backplane.

Cross‑Sourcing Strategy

Because Sullins uses standard .100" pitch, many parts from Samtec (TSW/SSW series) and Mill‑Max are physically interchangeable. When lead times stretch, use partscubeglobal.com to search by pitch, position count, and plating spec — you can often find an equivalent from another manufacturer that is available immediately. We've pulled this off more than once. Add all your candidate Sullins part numbers to a BOM upload and review alternates before locking a 10 K order.