Rectifier · Full-wave rectifier
5AR4
Same type as GZ34
Indirectly heated full-wave rectifier used in guitar and hi-fi power supplies.
Base: Octal
- Specs not yet verified against a datasheet
- No replacement verified yet
Where to buy 5AR4
- ReverbNo affiliate relationshipSearch 5AR4 on ReverbOpens reverb.com search results
Online marketplace for new and used music gear, including vacuum tubes.
- Apos Audio isn't listed: its site search didn't return a 5AR4 when we checked on Nov 4, 2026.
Each button opens that retailer's own search for 5AR4. We don't see their prices or stock.
Before you buy, check that the listing names 5AR4 or GZ34. A listing that mentions another tube name isn't necessarily the same type. Affiliate disclosure
Other names
- GZ34 same type
European designation for the 5AR4 type.
Specifications
Not yet verified
Electrical specifications are pending verification against a manufacturer datasheet. We don't publish numbers until they have a cited source.
Common uses
- power supply rectification
Replacing a 5AR4
A tube that fits the same socket is not automatically a safe replacement. Heater voltage, pin connections and electrical ratings must match what your amplifier is designed for. Check your amp's manual or a qualified technician.