Vacuum Tube - 5Y3 S, JJ Electronics, Rectifier

Vacuum Tube - 5Y3 S, JJ Electronics, Rectifier

JJ Electronics
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The JJ Electronic 5Y3S is a ruggedly built octal rectifier tube with a directly heated cathode. This tube’s solid construction and thick glass envelope offer high reliability. The JJ 5Y3S will work in any 5Y3 position.

Item ID:
JJ Electronics Part Number:
JJ Electronics
RoHS Compliant
Product Measurements by Type
Body Height79 mm
Filament Current (If)2 A
Filament Voltage (Uf)5 V
Item Diameter33.3 mm
Item Height93 mm
Packaging Information
Packaging Dimensions1.6 in. × 1.6 in. × 4.5 in.
Weight (Packaging)0.09 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet371.75 KB

Questions and Answers

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Asked by cheehpogi on September 14th, 2015.
September 14th, 2015
Staff Member
Top Contributor
This 5Y3 has 5 contact pins plus the keyway.

Product Reviews

4.75 out of 5 based on 16 reviews
Robert Zimmerman - August 6th, 2022
5 out of 5


Denton Perry - May 22nd, 2022
5 out of 5

Bought this for an early 70s Fender Champ along with a new JJ ECC803 and 6V6. Certainly breathed new life into this little beauty.

Patrick Coleman - October 6th, 2021
5 out of 5

Bought as a replacement for an old RCA rectifier tube... does the job exactly as advertised, reviewed and hoped for.

Chief 300 - September 24th, 2021
5 out of 5

I've built and sold several 5F1 amp heads recently. I like using a JJ 5Y3 rectifier tube in them for their consistently excellent performance and reliability. JJs have never let me down in this regard.

Michael D Richeson - July 7th, 2020
5 out of 5

The tube arrived defective...a faulty heater.

BSMet94 - April 20th, 2020
5 out of 5

Works perfectly (radio application), and for almost half the price of the lowest NOS 5Y3 rectifier!

Mike Lawton - April 1st, 2020
5 out of 5

These are perfectly good, functional 5Y3 rectifier tubes, and will work in antique radios needing a 5Y3, or 5Y3G, or 5Y3GT rectifier tube. I'm happy with this product.

Chris Smith - September 16th, 2019
5 out of 5

Great sounding product highly recommend

N.Frost - September 11th, 2019
5 out of 5

Solid rectifier tube. I wanted something that ran voltages significantly lower than a 5AR4 in a 6v6 cathode biased amp. This fit the bill perfectly and is working well. I love the folks at Antique Electronic Supply. They always ship quickly and they've been there for me since the late '90s.

Rick Geithmann - December 30th, 2018
5 out of 5

I acquired a 1937 Wards Airline radio chassis in working condition but with a couple of weak / bad tubes , the rectifier and magic eye.
The magic eye I was able to replace with one I had but the rectifier tube I decided to go with a brand new tube and the one from JJ Electronics fit the bill for it's price and quality. Working like a charm. Thanks.

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.