Engineering resources

Arlon 51N Material — Low-flow epoxy prepreg

51N: low-flow epoxy prepreg. An epoxy low-flow product in the EMD catalogue.

Manufacturer-listed material. Exact construction, availability and lead time require project-specific confirmation.

Where 51N fits in your design

Identify assembly excursions, storage controls and required pressed thickness in the fabrication package instead of relying on a family-level designation. Treat this as a process material within an approved stack. It cannot be specified as a finished PCB or substituted for a copper-clad core.

Material identification and technical reference

Exact designation	51N
Material role	Low-flow epoxy prepreg
Reference information	An epoxy low-flow product in the EMD catalogue.
Supply status	Listed on manufacturer website; stock not confirmed

Typical values are reference information, not acceptance limits. Match the test method, frequency, conditioning, thickness and document revision before comparing data. Missing figures are intentionally not estimated.

Fabrication review for 51N

Identify the construction. Provide the drawing revision, exact grade, layer sequence, dielectric thicknesses and copper requirements. Mark whether substitutions are prohibited or require written approval.
Review processing compatibility. Specify resin-flow limits, adjoining materials, openings and target bondline. The press cycle must suit all materials in the stack.
Set measurable acceptance criteria. Identify impedance coupons, dimensional checks, electrical testing and cross-sections that are required for this project. Do not assume a catalogue material specification covers finished-board reliability.

What changes the cost?

A useful 51N quotation starts with quantity, panel use and the exact material construction. Special thicknesses, foil requirements, additional lamination cycles and project-specific inspection can change sourcing and processing costs. A generic multiplier against FR-4 cannot establish the price of your build. Use the design and cost planning tools to organize the requirements, then request a written project quotation.

Prepare your 51N inquiry

Upload your fabrication drawing, stack-up and Gerber or ODB++ package through our project inquiry form. Include board size, quantity, finish, delivery target and the exact material designation. If this is an existing design, attach the approved material specification and identify any substitution restrictions.

Questions about 51N

Can another grade replace 51N?

Only after design and procurement approval. Compare material role, electrical properties, expansion, bond system and the qualified process. A similar dielectric constant or product name is not sufficient evidence.

Is 51N available for immediate manufacture?

Availability depends on the required thickness, foil and order quantity. Send the exact requirement through the inquiry form for a sourcing review before committing to a schedule.

Related material pages

Technical reference: Manufacturer material information. Checked 2026-10-07. Arlon PCB is an independent PCB manufacturer and is not the material manufacturer or an authorized representative.