• TWL8140DNL, 1000 Base Gigabit Low-Profile RJ45 Modular Jack with Transformer Tab Up without Led - side view
  • TWL8140DNL, 1000 Base Gigabit Low-Profile RJ45 Modular Jack with Transformer Tab Up without Led - front view
  • TWL8140DNL, 1000 Base Gigabit Low-Profile RJ45 Modular Jack with Transformer Tab Up without Led - back view
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TWL8140DNL 10/100/1000 Base-T Low-Profile RJ45 MagJack, Tab Up, No LEDs

The TeleWire Technology TWL8140DNL is a 10/100/1000 Base-T shielded RJ45 MagJack with integrated magnetics. Manufactured in Taiwan.

Cross Reference

  • Bel Fuse L837-1XX1-43 — the TWL8140DNL cross-references to this part.
  • LINK-PP LPJK7039DNL — same footprint, sourced outside mainland China.

Selection Notes

  • Low-profile body — reduced height where board-to-lid clearance is the constraint.
  • 10/100/1000 Base-T — the rate the internal transformer is wound for.
  • No LEDs — one fewer tolerance to hold between board and bezel.
  • Shielded shell without EMI fingers — the shield terminates through the PCB.

Typical application: slim gateways and rack sleds where enclosure height is the binding constraint.

Pricing for the TWL8140DNL ranges from $0.50 to $3.00 USD depending on order quantity and configuration, with volume tiers available on request.

Validate the TWL8140DNL 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 12P8C(RJ45)
Ports 1x1
Speed 10/100/1000 Base-T
Latch Type Up
Shielding Shield
PCB Mount Type Through Hole
Orientation Right Angle (90°)
AutoMDIX Yes
PCB Material FR4
Contact Material Gold
Contact Plating Gold Flash/ 6u"/ 15u"/ 30u"/ 50u"
Certification RoHS Compliant
Product Length (Inches/mm) 0.953/ 24.20
Product Width (Inches/mm) 0.701/ 17.80
Product Height (Inches/mm) 0.445/ 11.30
Temperature 0℃ ~ 70℃
Compatible Brands Belfuse

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 L837-1XX1-43?
The TWL8140DNL from TeleWire Technology cross-references to the Bel Fuse L837-1XX1-43 and to LINK-PP LPJK7039DNL. 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.
Can the TWL8140DNL be built to a different configuration?
Yes. The standard TWL8140DNL ships with a tab-up latch. TeleWire Technology can change LED colour, latch direction, contact plating thickness (Gold Flash through 50 microinch) and tray or reel packaging against your drawing, while holding the footprint that matches Bel Fuse L837-1XX1-43.
How do I qualify the TWL8140DNL as a second source?
Request a sample of the TWL8140DNL and the mechanical drawing from TeleWire Technology, then check the footprint against the Bel Fuse L837-1XX1-43 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.