Description
KL-520 is a fusion splicer designed for FTTx / fiber-to-the-home, telecom, network, and optical fiber maintenance projects.
Key features include:
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Fast splicing time: ~ 8 seconds in quick mode
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Fast heating time: ~ 18 seconds for the splice protection sleeve
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Electrode life: ~ 5,000 arcs
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Display: 3.5-inch TFT color LCD (800 × 480)
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Storage / Records: Supports 10,000 fusion records and 2,000 images
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Battery: 5,200 mAh battery; typical supports ~ 300 splice + heat cycles per full charge
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“Three-proof” design (waterproof, dustproof, drop resistant) for field use
| Parameter | Value / Range |
|---|---|
| Splice method | Active cladding alignment (core alignment) |
| Applicable fiber types | SM (ITU-T G.652 & G.657), MM (G.651), DS (G.653), NZDS (G.655) |
| Compatible fiber / cable diameter | 0.25 mm to 3.0 mm (coating) |
| Fiber cladding / coating sizes | Cladding: 80–150 μm ; Coating: 100–1,000 μm |
| Fiber cleave length needed | 8 to 16 mm |
| Number of splice modes | Up to 128 modes |
| Typical splice loss | SM: ~0.03 dB ; MM: ~0.01 dB ; DS / NZDS: ~0.04 dB ; G.657: ~0.03 dB |
| Return loss | >> 60 dB |
| Splicing time | Quick mode: 8 s ; average ~ 10 s |
| Heating time | ~ 18 s (for 40 mm sleeve, 250 μm fiber) in quick mode; adjustable |
| Protection sleeve lengths supported | 20 mm, 30 mm, 40 mm, 50 mm, 60 mm |
| Heat programs / modes | Up to 32 heat programs |
| Power / supply | AC 100-240 V ; DC 9-14 V |
| Port / interface | USB 2.0 for data export etc. |
| Weight | ~ 1.59 kg without battery ; ~ 1.92 kg with battery |
| Dimensions | 155 mm × 138 mm × 145 mm (with rubber bumper) |
| Operating conditions | –20 °C to +50 °C ; humidity up to 95% ; altitude 0–5,000 m ; wind up to 15 m/s |
| Storage conditions | –20 °C to +60 °C ; humidity up to 95% |
| Tension test | 1.96 – 2.25 N |
| Fiber magnification modes | X, Y, XY, X/Y modes, 320× magnification |
| Automatic functions | Auto fiber identification, auto arc calibration (by air pressure / temperature) |
| Electrode change mechanism | Tool-free electrode installation/removal |
✅ Strengths & Use Cases
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Very good for FTTx / drop cable / last-mile installations because of its compact size, fast operation, and good loss performance.
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Suitable for a field / on-site environment thanks to its three-proof design (resistant to dust, water, mild impacts)
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Decent battery life allowing many splice + heating cycles in the field.
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Stores many splice records and images — useful for documentation and quality assurance.
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Versatile: supports various fiber types (SM, MM, DS, NZDS) and a decent fiber diameter range.
Call Us or WhatsApp For confirm Pricing and stock availability.
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