3.96 mm (0.156") dual-row card edge connectors, OSSO perpendicular companion

Researched 2026-10-20. Digi-Key and Mouser blocked automated access (Cloudflare/Akamai), so no distributor page was opened directly. Prices and stock come from search snippets of Digi-Key mirror/broker listings. Each entry is labeled with where it came from. Recheck before you buy.

Correction: EBC10DRAS / EBC10DCWN are 0.100" (2.54 mm) pitch. In Sullins numbering the 3rd letter sets the pitch: C = .100", M = .156". The 0.156" equivalents are EBMxx...

Right-angle variant, if the companion card should sit parallel instead: EBM10DRAS (2x10, side-mount ears; Sullins page lists 5 A / 950 VAC). Broker copy of Digi-Key data shows ~[amount removed], ~154 pcs. TE / Amphenol: no 0.156" dual-row THT part was confirmed in this pass. Not included.

URLs

• Sullins product pages: https://www.sullinscorp.com/product/?pn=EBM10DRTH&toggle=in (swap the pn for the others)
• Digi-Key search (not opened; blocked): https://www.digikey.com/en/products/result?keywords=EBM10DRTH, ...=305-020-521-202
• EDAC series page: https://edac.net/series/305

Datasheets (local; all start with %PDF and extract text with pdftotext)

• Sullins_PAGE74-75_156_LP_DS.pdf: catalog for EBMxxDRTx/DRAx (LP .431"). https://s3.amazonaws.com/catalogspreads-pdf/PAGE74-75%20.156%20LP%20DS%20EYE%20RA.pdf
• Sullins_C11126_EBMxxDRAS_drawing.pdf: https://drawings-pdf.s3.amazonaws.com/C11126.pdf
• Sullins_PAGE78-79_156_HP_DS.pdf: catalog for EBMxxDCWx (HP). https://s3.amazonaws.com/catalogspreads-pdf/PAGE78-79%20.156%20HP%20DS%20WW%20RA%20CE.pdf
• Sullins_C11646_EBMxxDCWx_drawing.pdf: https://drawings-pdf.s3.amazonaws.com/C11646.pdf
• EDAC_305_315_355_ordering_guide.pdf: https://files.edac.net/edac/content/series/og/English/EDAC%20305%20315%20355%20Series%20Card%20Edge%20Connectors%20English%20Ordering%20Guide.pdf (No DRTH-specific drawing was downloaded; the LP catalog spread covers it.)

Recommendation (OSSO top-board perpendicular companion, 5 A rails, low voltage)

Primary: EDAC 305-020-521-202 (2x10), or 305-030-521-202 if you need 2x15. It is the only candidate with a datasheet rating of 5 A per contact continuous. It also has gold on the mating area, accepts 1.37-1.78 mm boards, has 0.128" mounting ears and takes polarizing keys, and lists at about [amount removed] each at Digi-Key. Gang at least 2 contacts per rail, plus the matching contact on the opposite row: 4 contacts per 5 A rail and 4 per return. That gives margin for derating with all contacts loaded. Alternative: Sullins EBM10DRTH / EBM15DRTH. Similar price, and the 0.125" clearance ears and PLA-K1 keys are well documented. Its rating is only 3 A with one contact energized, so plan ≥3 ganged contact pairs per 5 A rail. Notes for the mating card: 1.57 mm FR4 with hard gold (or at least ENIG) fingers, chamfered edge, and a key slot cut where the polarizing key sits. Voltage ratings are far above anything a low-voltage design needs.

2026-10-20 addendum — 2x22 (44 contacts) for the OSSO card-edge family

• EDAC 305-044-521-202 exists: 44 is a tabulated size in the ordering guide (A 110.19, B 102.31 mtg-hole spacing, C 95.05 body, D 91.34 card slot (305/355), E 83.21; W 8.71 up to 27/54; slot depth 7.49).
• EDAC part drawing (saved: EDAC_305-044-521-202_drawing.pdf): https://files.edac.net/edac/content/305/305-044-521-202%20-%20EDAC%20Card%20Edge%20Connector.PDF. Body height 0.460 (11.68) on the drawing vs 0.470 (11.94) in the ordering guide.
• Distributor/broker pages seen in search (not opened via a distributor login; prices unverified): IBS Electronics ~[amount removed] (MOQ 25, 9 wk lead time): https://www.ibselectronics.com/part/edac/305-044-521-202/1065367/ ; key-components.com lists it as Active, ~[amount removed] @1.

PCB-mount AC-DC modules, 10–15 W (researched 2026-10-20, the designer / OSSO card-edge PSU companion)

Only the MEAN WELL datasheets were downloaded. Both files start with %PDF and convert cleanly with pdftotext. Recom, CUI and Hi-Link were not downloaded or checked here; any figures for them come from memory and are UNVERIFIED.

Chosen: MEAN WELL IRM-15-5

All values are from the datasheet.

• Electrical:
  • Output 5 V at 3 A (15 W). Other outputs: 3.3 V/3.5 A, 12 V/1.25 A, 15 V/1 A, 24 V/0.63 A.
  • Input 85–305 Vac (120–430 Vdc).
  • Efficiency 78% on the 5 V model.
• Mechanical:
  • Body 52.4 x 27.2 x 24 mm, tolerance ±0.5.
  • Pins Ø1.0, length 3.5 ±1.
  • Mass about 50 g (from the packing line).
• Pin positions, bottom view, measured from the case corner (case 219A):

• Safety and EMC:
  • Class II, with no FG pin.
  • EMI filter built in (EN55032 class B).
  • Surge immunity EN61000-4-5 level 4.
  • I/P-O/P withstand 4.2 kVac.
• Thermal: works from -30 to 85 °C with derating.
• Input circuit: the datasheet gives no recommended fuse or MOV. The fuse and MOV values used on the card are UNVERIFIED.

Why this one:

• Real datasheet obtained.
• 15 W in the smallest common 4-pin footprint.
• Universal input.
• Wave-solderable: 265 °C for 5 s, which suits the dip pot.
• Same pin family as the IRM-10, which can be swapped in on a different footprint.

Alternative: MEAN WELL IRM-10

• Body 45.7 x 25.4 x 21.5 mm, mass 33 g.
• 5 V/2 A output.
• Different footprint.