• TW1921G5NL, 1000 Base Gigabit Cat6 RJ45 with Transformer Tab Down with Green&Yellow/ Green&Yellow Led - TeleWire Technology
  • TW1921G5NL, 1000 Base Gigabit Cat6 RJ45 with Transformer Tab Down with Green&Yellow/ Green&Yellow Led - TeleWire Technology
  • TW1921G5NL, 1000 Base Gigabit Cat6 RJ45 with Transformer Tab Down with Green&Yellow/ Green&Yellow Led - TeleWire Technology
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TW1921G5NL 10/100/1000 Base-T RJ45 MagJack, Tab Down, Green&Yellow/ Green&Yellow LED

The TeleWire Technology TW1921G5NL is a 10/100/1000 Base-T EMI-finger shielded RJ45 MagJack with integrated magnetics. Manufactured in Taiwan.

Cross Reference

  • Bel Fuse SI-61002-F — the TW1921G5NL cross-references to this part.
  • Würth Elektronik 7499111441A — a further published equivalent on the same footprint.
  • Würth Elektronik MIC3801D-5166 — a further published equivalent on the same footprint.

Selection Notes

  • 10/100/1000 Base-T — the rate the internal transformer is wound for.
  • Green&Yellow/ Green&Yellow LEDs — indicated condition set by the host PHY design.
  • Integrated magnetics — the transformer sits in the shell, freeing board area beside the PHY.
  • EMI grounding fingers — shield path closes against the chassis bezel.

Typical application: single-board computers and SoM carriers taking gigabit off a host PHY.

Pricing for the TW1921G5NL ranges from $0.50 to $3.00 USD depending on order quantity and configuration, with volume tiers available on request.

Validate the TW1921G5NL 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 10P8C(RJ45)
Ports 1x1
Speed 10/100/1000 Base-T
Latch Type Down
LED Green&Yellow/ Green&Yellow
Shielding Shield with EMI Finger
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) 0.839/ 21.30
Product Width (Inches/mm) 0.626/ 15.90
Product Height (Inches/mm) 0.528/ 13.40
Temperature 0℃ ~ 70℃
Compatible Brands Belfuse, WE, YDS

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-61002-F?
The TW1921G5NL from TeleWire Technology cross-references to the Bel Fuse SI-61002-F and to LINK-PP LPJG0820G4NL. 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 TW1921G5NL replace?
The TW1921G5NL cross-references to Bel Fuse SI-61002-F; Würth Elektronik 7499111441A; Würth Elektronik MIC3801D-5166; YDS 48F-19DDDP2NL, and to LINK-PP LPJG0820G4NL. 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 TW1921G5NL as a second source?
Request a sample of the TW1921G5NL and the mechanical drawing from TeleWire Technology, then check the footprint against the Bel Fuse SI-61002-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.