Chains & Infrastructure
Tron Chain: DPoS, 3-Second Blocks, and Energy Fees
Tron is a delegated proof of stake chain with 27 elected block producers and 3-second slots. A block solidifies once 18 subsequent blocks from different producers acknowledge it. Fees burn TRX by an Energy model. The chain carries about $92.30 billion of USDT, its dominant stablecoin.
| Fact | Value | As of | Source |
|---|---|---|---|
| Genesis block (explorer-indexed) | 2018-06-25 01:51 UTC | C-17 | |
| Block producers | 27 Super Representatives | C-14 | |
| Block interval | About 3 seconds per slot | C-14 | |
| Finality rule | Solidified after 18 subsequent blocks from different producers | C-14 | |
| Median USDT transfer fee (observed) | 345,000 SUN, about $0.117 | C-15 | |
| Energy burn rate | 100 SUN per Energy | C-13 | |
| Stablecoins on chain (provider) | $93,758,347,521 | S-05 | |
| Native USDT | TRC-20, issuer-listed | T-39 | |
| Native USDC | None since 21 February 2024 | TR-01 |
What Tron is
Tron is a smart contract network launched in June 2018. Its genesis block is indexed at 25 June 2018, 01:51 UTC [4]. That timestamp deserves one nuance. The raw block header, served by two independent nodes, exposes no timestamp field at all. Explorer indexes carry the genesis time, and block 1 lands on-chain nine seconds later [3]. The page states both legs rather than smoothing them over.
The network’s role in this library is specific. Tron carries the largest single leg of the largest stablecoin. That fact shapes the rest of this page.
How consensus works
Tron runs delegated proof of stake. The documentation sets the number of Super Representatives, the block producers, at 27 [1]. Voting is stake-weighted: for every 1 TRX staked, a user receives 1 vote [1]. Producers stand for re-election every 6 hours, at epoch maintenance [1].
Block production runs on 3-second slots [1]. Maintenance skips two slots, 6 seconds, each epoch [1]. The design concentrates block production in a small elected set. That is the model’s trade. It buys predictable throughput with a tighter producer group.
What finality means here
The docs give the rule in two forms. A block becomes irreversible, a solidified block, once at least 70 percent of the producers acknowledge it [1]. The second form: a block is solidified when 18 subsequent blocks come from 18 different producers [1].
The documentation states no seconds figure for solidification. This page does not derive one. The slot rate is 3 seconds, and the arithmetic is the reader’s to do, but a derived number is not a documented number and this site keeps them apart.
How fees work
Tron charges through two resources, Bandwidth and Energy. When staked resources run out, the network burns TRX from the sender at fixed rates [2]. Energy burns at 100 SUN per unit, and Bandwidth at 1,000 SUN per byte [2]. The charging order is fixed: staked Bandwidth first, then a free daily quota, then burn [2]. Energy has no free quota [2]. Both rates are chain parameters and can change by proposal [2].
Observed transfers tell the practical story. Over 28 sampled USDT transfers, the median burned fee was 345,000 SUN [3]. At the same-session TRX price, that is about $0.117 [3]. Eight of the 28 paid zero, because staked or shared Energy covered them [3]. An independent node, sampled in a second window, returned the same median [3]. A derived ceiling helps frame the spread. At the documented rates, a no-stake transfer burning the observed median Energy would cost about 6.43 TRX [2]. That figure is arithmetic on documented rates, not an observed median, and it is labeled as such.
The stablecoin economy
Tron’s stablecoin economy is one token’s economy. The issuer’s transparency render, stamped 9 September 2026, put USDT on Tron at $92.30 billion net circulation [7]. A tracker’s chain total, all stablecoins combined, read $93.76 billion on 11 September 2026 [5]. The gap is everything else. One residual matters: a USDC-named legacy token worth about $28 million, a ratio of roughly 3,300 to 1 [5].
The USDT page holds the issuer figures. The USDC on Tron page holds the record of the token that left: Circle discontinued native USDC there in February 2024, and no issuer-supported USDC exists on the network [8].
The roster and address discipline
One issuer-listed dollar stablecoin runs natively on Tron: USDT, as a TRC-20 token, listed on the issuer’s own protocols page [6]. No native USDC exists [8]. No EURC row exists for Tron on the issuer’s table either, as of the same capture date.
This page prints no contract addresses, by standing rule. On this network the rule is strict: addresses for tokens here are base58 strings that look like nothing else, and the only safe source is the issuer’s own documentation [6]. An explorer listing is not issuer support, a lesson the USDC-on-Tron record teaches in full.
How the fee figures were checked
The fee observations carry their own checking trail. One node, TronGrid, served the first sample of 28 successful USDT transfers. An independent node, TronStack, served a second window [3]. Both returned the same median burned fee and the same median Energy [3]. A third leg came from the explorer’s own transaction-cost field, which matched the node receipts on the sampled transactions [4]. The USD figure uses a same-session TRX price from a market data provider. It is a conversion aid, not a chain fact, and the page treats it that way.
Where this page sits
The chains hub covers the other networks that carry stablecoin flow, each on the same documents-first method. The stablecoins hub frames the tokens themselves. Every figure above carries its date, and the reviewed date at the foot moves when the documents move.
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