How do you calculate the radiation part premium for a space board?

Multiply the rad-hard component count by the premium over the COTS equivalent, then by the share of parts that actually need hardening, and add the fixed lot radiation test charge. With 48 parts, $1,200 premium, 70% needing rad-hard grade, and an $8,500 lot test charge, the total is $48,820.

What is the per-part radiation premium in this example?

Divide the total premium by the rad-hard part count: $48,820 / 48 = about $1,017 per part. That per-part figure blends the flat component premium with the amortized lot test charge across the board.

Why separate variable premium from the fixed lot test charge?

The variable premium ($40,320 here) scales with quantity and part count, while the fixed lot RLAT charge ($8,500) is paid once per lot regardless of board count. Separating them shows how the per-part premium falls as you build more boards from the same qualified lot.

Rad-hard vs rad-tolerant COTS: which is cheaper?

Rad-hard parts carry the full premium modeled here; rad-tolerant COTS upscreening trades that for engineering, radiation testing, and mission-risk. If your total premium is dominated by a few expensive parts, a targeted COTS-with-shielding strategy on those parts can cut the number sharply.

What is a good radiation part premium per board?

There is no universal target, but if the premium exceeds roughly a third of your populated-board cost, it signals the design is radiation-limited and worth a trade study. At ~$1,017 per rad-hard part, this board is firmly in high-reliability space territory.

Does the share requiring rad-hard grade really matter?

Yes. Not every part on a space board sees the same environment; parts behind shielding or in benign locations may stay COTS. Dropping the share from 100% to 70% here cut the variable premium by nearly $17,000, so an honest part-by-part hardness assessment pays off.

Space Payload & Avionics Manufacturing calculator

Radiation Part Premium Calculator

The radiation part premium is the extra dollars a spacecraft electronics build carries because certain parts must survive total-ionizing-dose and single-event effects that commercial-grade (COTS) parts do not. Space payload cost engineers, avionics BOM owners, and program managers use it to defend a bid, negotiate a make-vs-screen decision, and understand how much of a board's cost is driven purely by the space environment. On a high-reliability GEO or deep-space board, rad-hard silicon and lot RLAT (radiation lot acceptance testing) can quietly dominate the parts budget. Knowing the premium per board and per part tells you whether upscreening, shielding, or a rad-tolerant COTS strategy is worth pursuing.

What this calculator does

Estimates the added cost of specifying radiation-hardened components over commercial equivalents across a flight board build.
A payload electronics buyer sizing how much TID and SEE hardness requirements add to a quoted assembly.
It computes the total radiation-driven cost adder for a board (variable part premium plus the fixed lot test charge) and the resulting premium per rad-hard part.

Formula used

Total premium = rad-hard parts x premium over COTS x share needing hardness + lot test charge
Per-part premium = total premium / rad-hard parts

Inputs explained

Rad-Hard Components per Board:
Premium Over COTS Equivalent:
Share Requiring Rad-Hard Grade:
Lot Radiation Test Charge:

How to use the result

Use it during BOM costing, proposal pricing, or a rad-hard-vs-rad-tolerant trade study before committing a design to a radiation environment.
It treats the per-part premium as a flat average; real rad-hard pricing varies enormously by part type (a rad-hard FPGA premium dwarfs a rad-hard regulator), so validate against actual quotes for driver parts.

Current U.S. benchmarks

Global copper trades at $13,484 per tonne (IMF via FRED, May 2026), up 41.5% in a year, and U.S. industrial electricity averages 8.66 cents per kWh. Both feed electrified-hardware unit economics.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate the radiation part premium for a space board? Multiply the rad-hard component count by the premium over the COTS equivalent, then by the share of parts that actually need hardening, and add the fixed lot radiation test charge. With 48 parts, $1,200 premium, 70% needing rad-hard grade, and an $8,500 lot test charge, the total is $48,820.
What is the per-part radiation premium in this example? Divide the total premium by the rad-hard part count: $48,820 / 48 = about $1,017 per part. That per-part figure blends the flat component premium with the amortized lot test charge across the board.
Why separate variable premium from the fixed lot test charge? The variable premium ($40,320 here) scales with quantity and part count, while the fixed lot RLAT charge ($8,500) is paid once per lot regardless of board count. Separating them shows how the per-part premium falls as you build more boards from the same qualified lot.
Rad-hard vs rad-tolerant COTS: which is cheaper? Rad-hard parts carry the full premium modeled here; rad-tolerant COTS upscreening trades that for engineering, radiation testing, and mission-risk. If your total premium is dominated by a few expensive parts, a targeted COTS-with-shielding strategy on those parts can cut the number sharply.
What is a good radiation part premium per board? There is no universal target, but if the premium exceeds roughly a third of your populated-board cost, it signals the design is radiation-limited and worth a trade study. At ~$1,017 per rad-hard part, this board is firmly in high-reliability space territory.

Last reviewed 2026-05-12.