Top 10 Sullins Connector Solutions Parts Every Hardware Engineer Should Know

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The Quiet Specialist Behind Most 2.54 mm Headers

Sullins Connector Solutions has been making edge cards and headers in San Marcos, California since 1971, and it shows the way specialist suppliers should work: the company claims its standard connectors are never discontinued, ships standard configurations from an in-house facility in five days or less, and has held AS9100 aerospace certification since 2013. If you have ever picked a 2.54 mm breakaway header out of a distributor drawer, there is a good chance you touched a Sullins part or its footprint twin. That never-discontinued promise is the main reason we spec Sullins without hunting for alternates. These are the ten part numbers worth knowing.

The PPTC Workhorse: 2.54 mm Breakaway Headers

The PPTC series is the bread-and-butter single-row header, rated 3 A per contact at 250 V, −40 °C to 105 °C, UL94 V-0, phosphor bronze contacts. Every part in the series shares one footprint, so swapping pin counts is a BOM edit, not a layout change.

PPTC021LFBN-RC — 2 positions, tin-plated. The classic jumper, test-point, and "two wires off the board" header. DigiKey S7000-ND, around $0.37 at unit quantity and ~$0.19 at 10k.
PPTC051LFBN-RC — 5 positions (DigiKey S6103-ND). The breakout header for sensors and switches.
PPTC101LFBN-RC — 10 positions (DigiKey S7008-ND). The standard size for parallel interfaces and module connectors.
PPTC142LFBN — 28 positions in a 14×2 dual-row configuration. The dual-row version when a single row no longer fits the routing.

Finer Pitch and Board-to-Board

PBC31SABN — 31 positions, single row, straight, 2.54 mm. When you need a longer single-row header and the PPTC length options don't cover it.
NPPN402 — 2.00 mm pitch, 80 positions, board-to-board header with female socket contacts. The go-to when 2.54 mm density runs out but the assembly equipment can still handle through-hole.
GRPB151VWTD-RC — 1.27 mm (0.050") pitch, 15 positions. The fine-pitch workhorse for high-density routing where a 2.54 mm part wastes board area.

Card Edge: Sullins' Original Specialty

Sullins built its name on card edge connectors, and the series naming tells you a lot: three letters (ECC, ACC, EBC, RZB...) for the family, then position count and a style code. Any legacy design with a daughter card probably uses one of these:

EBC06DPEN — from the EBC family, 0.100" (2.54 mm) pitch card edge with dip-solder tails. The classic board-to-board card edge for expansion and legacy bus designs.
ACB25DHHN — 1.27 mm pitch, 50 positions (25×2). The high-density answer when 2.54 mm card edge is too wide.
RZB85DHHN — 1.27 mm dual-readout, 170 positions. The top end of the density range, for mezzanine and high-pin-count edge applications.

Sourcing Notes

Sullins' "never discontinued" policy is genuinely useful for procurement: it removes the EOL risk that kills legacy products. Availability is generally strong — the PPTC parts are carried in quantity by major distributors (DigiKey alone listed the PPTC021LFBN-RC with stock ranging from ~1,700 to ~34,000 units across regional sites), though when distribution runs dry the manufacturer lead time can stretch past ten weeks. Check stock before you commit.

Standard 2.54 mm breakaway headers are the most footprint-compatible part class in the industry: most brands' headers and sockets interchange mechanically, which makes the PPTC family an easy second source or replacement. We've swapped brands on these footprints without a layout change.

Build Your BOM With Sourcing In Mind

Ten parts cover most of what a board designer reaches for, and they are all standard, stocked, and unlikely to vanish. Search parts to check live availability and reference pricing on Sullins and equivalent headers before your next layout freeze — and keep partscubeglobal.com in the loop when you commit the BOM.