Formable Interconnect
Cable Assemblies
for Fixed Wiring
Formable cables that can be bent and shaped by hand — and hold their form. Superior insertion loss vs. semi-rigid cables. Six variants covering 18 GHz up to 100 GHz, rated -30 to +85 °C (MWX461: -65 to +125 °C).
The Formable Alternative to Semi-Rigid
The 4 and 5 Series are designed for fixed wiring inside and between equipment in the microwave band. Unlike semi-rigid cables, these assemblies can be bent and shaped by hand and retain their form — eliminating custom bending tools while delivering lower insertion loss than equivalent semi-rigid cables. The 4 Series replaces semi-rigid cables; the 5 Series replaces semi-flexible cables.
- ✓Formable by hand — shape-retention capability for clean routing
- ✓Lower insertion loss than equivalent semi-rigid cables
- ✓4 Series: 18–67 GHz (MWX461 up to 100 GHz with 1.0 mm connector)
- ✓5 Series: 18 GHz — direct semi-flexible cable replacement
- ✓Ultra-slim MWX461: 1.33 mm OD, 4.6 g/m, 5 mm bend radius
- ✓All variants: 50 Ohm impedance, RoHS compliant
- ✓Ships in 11 business days
4 Series — Semi-Rigid Replacement
Replaces conventional semi-rigid coaxial cables. Excellent formability with lower insertion loss. Four variants from 18 GHz to 67/100 GHz.
5 Series — Semi-Flexible Replacement
Replaces semi-flexible coaxial cables. Two variants at 18 GHz covering the most common semi-flexible cable sizes.
4 Series — 4 Variants
All 4 Series variants share 50 Ohm impedance and formable construction. Covers 18 GHz to 100 GHz depending on connector choice.
ø2.2 semi-rigid replacement — slim 2.5 mm OD
ø3.6 semi-rigid replacement — lowest loss in 4 Series
40 GHz — lightest at 17 g/m
Ultra-slim 1.33 mm — up to 100 GHz with 1.0 mm connector
5 Series — 2 Variants
The 5 Series replaces semi-flexible cables at 18 GHz. Both variants use SMA (m) Straight connectors as standard.
Semi-flexible ø2.1 replacement — 10 mm bend radius
Semi-flexible ø3.45 replacement — lowest loss in 5 Series
Technical Comparison
All specifications are typical values. RoHS compliant. Characteristic impedance 50 Ohm on all variants.
| Model | Series | Max Freq. | OD | Mass | VSWR | Ins. Loss | Prop. Delay | Vel. of Prop. | Bend Radius | Length Range |
|---|---|---|---|---|---|---|---|---|---|---|
| MWX411 | 4 Series | 18.0 GHz | 2.5 mm | 19 g/m | 1.40 | 2.2 dB/m | 4.3 ns/m | 78% | 15 mm | 100 – 5,000 mm |
| MWX412 | 4 Series | 18.0 GHz | 4.0 mm | 41 g/m | 1.40 | 1.4 dB/m | 4.4 ns/m | 76% | 20 mm | 100 – 5,000 mm |
| MWX441 | 4 Series | 40.0 GHz | 2.4 mm | 17 g/m | 1.50 | 4.3 dB/m | 4.3 ns/m | 78% | 15 mm | 100 – 5,000 mm |
| MWX461 | 4 Series | 67.0 GHz* | 1.33 mm | 4.6 g/m | 3.0 | 12 dB/m | 4.7 ns/m | 70% | 5 mm | 40 – 2,000 mm |
| MWX511 | 5 Series | 18.0 GHz | 3.0 mm | 19 g/m | 1.40 | 3.1 dB/m | 4.7 ns/m | 71% | 10 mm | 100 – 5,000 mm |
| MWX512 | 5 Series | 18.0 GHz | 4.4 mm | 41 g/m | 1.40 | 2.0 dB/m | 4.7 ns/m | 71% | 15 mm | 100 – 5,000 mm |
* MWX461 maximum operating frequency is 100 GHz when used with SMPS (f) or 1.0 mm (m) connector. Typical values at 25 °C for reference only.
Simple Criteria for Cable Selection
All 4 & 5 Series cables share formable construction and 50 Ohm impedance. Choose based on frequency, insertion loss requirement, and which semi-rigid or semi-flexible cable you are replacing.
Lower Insertion Loss
Choose a larger outer diameter cable (MWX412, MWX512)
Higher Frequency
Choose MWX441 (40 GHz) or MWX461 (67–100 GHz)
Best Flexibility
Choose a smaller outer diameter cable (MWX461 at 1.33 mm)
Semi-Rigid Replacement
4 Series: MWX411 (ø2.2) or MWX412 (ø3.6). 5 Series: ø2.1 / ø3.45
The EMF Series Family
The full EMF product family covers RF and microwave cable assemblies for every test and measurement application.
Ready to order or need technical advice?
Koto Electronics is the authorized Israeli representative of Junkosha Inc. Contact us for pricing, availability, and custom specifications.