• TWD5123DNL, 10/100 Base Vertical Integrated RJ45 Modular Jack with Transformer Tab Up without Led - side view
  • TWD5123DNL, 10/100 Base Vertical Integrated RJ45 Modular Jack with Transformer Tab Up without Led - front view
  • TWD5123DNL, 10/100 Base Vertical Integrated RJ45 Modular Jack with Transformer Tab Up without Led - back view
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TWD5123DNL 10/100 Base-T Vertical RJ45 MagJack, Tab Up, No LEDs

The TeleWire Technology TWD5123DNL is a 10/100 Base-T shielded RJ45 MagJack with integrated magnetics. Manufactured in Taiwan.

Cross Reference

  • Bel Fuse SI-16003-F — the TWD5123DNL cross-references to this part.
  • Bel Fuse SI-16004-F — a further published equivalent on the same footprint.
  • Pulse JXD2-0Z14NL — a further published equivalent on the same footprint.

Selection Notes

  • Vertical (180°) body — the port faces up, away from the board plane.
  • 10/100 Base-T — the rate the internal transformer is wound for.
  • −40 °C to +85 °C — industrial range, not the commercial 0-to-70 grade.
  • No LEDs — the full front aperture stays clear for the mating plug.

Typical application: outdoor and unheated cabinets where the port exits through a top cover.

Pricing for the TWD5123DNL ranges from $0.50 to $3.00 USD depending on order quantity and configuration, with volume tiers available on request.

Validate the TWD5123DNL on your board first. Samples are available for design validation, and the mechanical drawing gives the footprint before you commit a layout. Request a sample or quotation.

Product Packaging Information

Package Tray (Reel packaging options available)
Carton size 32*30*31cm
Qty/carton 1200pcs
G.W/carton 8.5kg
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Product Specifications

RJ Type 8P8C(RJ45)
Ports 1x1
Speed 10/ 100 Base-T
Latch Type Up
Shielding Shield
PCB Mount Type Through Hole
Orientation Vertical (180°)
AutoMDIX Yes
PCB Material FR4
Contact Material Gold
Contact Plating Gold Flash/ 6u"/ 15u"/ 30u"/ 50u"
Certification RoHS Compliant
Product Length (Inches/mm) 0.665/ 16.90
Product Width (Inches/mm) 0.630/ 16.15
Product Height (Inches/mm) 0.665/ 16.90
Temperature -40℃ ~ 85℃
Compatible Brands Belfuse, Pulse

Related jacks

Same family, different latch, LED or plating option.

Cost-Effective Alternatives for Major Brand RJ45 Jack

Facing long lead times or high costs from major connector brands? We provide high-quality, drop-in replacements for standard modular jacks from TE, Molex, Amphenol, and Wurth. Our connectors match industry-standard footprints and performance specs at a more competitive price point.

From Flash, 3µ", 6µ", 15µ", 30µ", to 50µ" gold plating
Share the drawing to get equivalent match
Short lead times and consistent manufacturing in Taiwan
100% tested for contact resistance and insulation integrity
Request Custom Quote

We reply within 24 hours. No account needed. Your specifications stay confidential; NDA available on request.

What is a Taiwan-made alternative to the Bel Fuse SI-16003-F?
The TWD5123DNL from TeleWire Technology cross-references to the Bel Fuse SI-16003-F and to LINK-PP LPJD4012DNL. It is manufactured in Taiwan, giving buyers a supply route outside mainland China for the same footprint. Send the footprint you are designing against and TeleWire Technology will confirm compatibility.
Which manufacturers' parts does the TWD5123DNL replace?
The TWD5123DNL cross-references to Bel Fuse SI-16003-F; Bel Fuse SI-16004-F; Pulse JXD2-0Z14NL, and to LINK-PP LPJD4012DNL. TeleWire Technology publishes the full cross-reference so a sourcing engineer can qualify one Taiwan-built part against several incumbents at once.
How do I qualify the TWD5123DNL as a second source?
Request a sample of the TWD5123DNL and the mechanical drawing from TeleWire Technology, then check the footprint against the Bel Fuse SI-16003-F on your board. TeleWire Technology builds in Taiwan under an ISO 9001 quality system, and its engineering team will review your drawing before you commit.