SC Hot-Melt Connectors KW-04 — SC/APC & SC/UPC Splice-On
Splice-on SC connectors: fusion-welded in the splicer for a true fused joint, in a 58 mm type and a 0.9 mm type, APC and UPC.
Typical work: Splice-on SC terminations where a splicer is already on site; Repair cords and closure pigtails made to length; Crews standardising on fused joints for premium installs.
Get a Quote WhatsApp UsNeutral stock in small lots, or private label made to your requirements. Prices on request — EXW factory pricing.
KW-04 key features
- A real fusion joint, not a mechanical one — the connector's stub is welded to the field fiber in a standard splicer
- Two builds: the 58 mm type for drop and round cable, and the 0.9 mm type for tight-buffered fiber
- SC/APC (green) and SC/UPC (blue), factory-polished ferrules
- Heat-shrink protection sleeve included — the splice is sealed inside the connector tail
- Insertion loss typical ≤0.3 dB after fusion; return loss ≥55 dB UPC and ≥60 dB APC
KW-04 specifications
| Connector type | SC hot-melt (splice-on) connector, fusion terminated |
|---|---|
| Variants | SC/APC (green) · SC/UPC (blue) |
| Versions | 58 mm type for drop / round cable · 0.9 mm type for tight-buffered fiber |
| Fiber | Single-mode G.652D / G.657A |
| Applicable cable | Flat drop 2×3.0 mm; round Ø2.0 / Ø3.0 mm; 0.9 mm tight-buffered, by version |
| Ferrule | Zirconia ceramic, 2.5 mm |
| Insertion loss | Typical ≤0.3 dB after fusion (1310 / 1550 nm) |
| Return loss | UPC ≥55 dB · APC ≥60 dB |
| Operating temperature | -40°C to +75°C |
| Termination | Fusion splicer + heat-shrink sleeve (included) |
| Dimensions | — |
| Weight | — |
How It Works — when the job wants a weld, not a clamp
Hot-melt (splice-on) connectors take the opposite bet from fast connectors: instead of a mechanical V-groove joint, the field fiber is fusion-spliced to the connector's factory stub, and the heat-shrink sleeve seals the weld inside the housing. Any core-alignment splicer does it, and the result is optically a factory cord — with the length made on site.
Choose the 58 mm KW-04 for drop and round cable terminations, and the slim 0.9 mm type for pigtail-style work inside closures and panels. If no splicer is on the truck, the mechanical KW-01 is the same SC interface without the weld.
Where the KW-04 works
Splice-on SC terminations where a splicer is already on site
Part of the Fusion Splicers & Connection range — see the specifications above for the figures that matter on this work.
Repair cords and closure pigtails made to length
Part of the Fusion Splicers & Connection range — see the specifications above for the figures that matter on this work.
Crews standardising on fused joints for premium installs
Part of the Fusion Splicers & Connection range — see the specifications above for the figures that matter on this work.
KW-04 components
- KW-04 hot-melt connector ×1 (polish and version as ordered)
- Heat-shrink protection sleeve ×1
Documents for this model
Product Catalog 2026 — this model appears in our full-range catalog (PDF), published in the Downloads center.
User manual — if you need the manual for this model now, ask via the inquiry form below or on WhatsApp and we will send the available documents with your quote.
More fusion splicers & connection
Questions about the KW-04
Can the KW-04 carry our own brand?
Private labeling is made to your requirements and confirmed per order — labels with your logo, part numbers and barcodes on the tools, the inner boxes and the outer cartons, ready for your warehouse. The products most often labeled are the K-35 cleaver, the KS-1 Kevlar shears and the K-870 stripper.
Can we order a small lot, unbranded?
Yes. Neutral stock is held for the core range: small lots are welcome, you can mix models in one shipment, and restock as you sell. Prices are on request — EXW factory pricing.
Ask for a quote — KW-04
Tell us the quantity, and whether you want it neutral or with your brand on it.