# TL391 — documented alternatives

> The closest documented alternative to TL391 is 3PEAK TL391, graded P2P (pin- and software-compatible candidate, high confidence). No differences are recorded in the cited evidence; review both datasheets for application conditions. Every match is an engineering-review candidate, not an unqualified drop-in claim.

Canonical page: https://senneon.com/cross-reference/tl391
Data verified: 2026-07-13 · Grading methodology: https://senneon.com/verification

## Graded candidates

| Candidate | Brand | Grade | Confidence | Known differences | Evidence |
|---|---|---|---|---|---|
| TL391 | 3PEAK | P2P | high | none recorded in cited evidence — review datasheets | Industry-standard second source; vendor datasheet carries the same part number (checked 2026-07-13) — https://senneon.com/evidence/3peak/datasheet_tl331_tl391_lm2903_lm2901.pdf |

Commercial terms are quote-only; no price, stock or lead-time claims are published. RFQ: https://senneon.com/rfq?pn=TL391