How to identify E17
- Measure the threaded metal base across its widest point.
- Check the appliance label and owner's manual for wattage and heat requirements.
- Look for E17 or the words intermediate base.
Where it is commonly used
Common use is a clue, not proof. The fixture label and model documentation take priority over a visual match.
Bulb shapes sold with this base
You may see these shapes with a E17 base. The base code does not guarantee the bulb width, length, beam angle, or clearance.
Before you buy a replacement
- An appliance bulb may need vibration or heat resistance.
- A bulb that physically fits is not automatically appliance-rated.
- Disconnect power before removing an appliance cover.
Quick answers
Questions about the E17 bulb base
What is a E17 bulb base?
E17 sits between candelabra E12 and standard E26. It is common in compact appliance fixtures where a full-size bulb would not fit.
What size is a E17 bulb base?
E17 has a nominal 17 mm diameter. Measure straight across the threaded metal base. Use the printed base code when available because a visual estimate is not conclusive.
Where is a E17 bulb base commonly used?
Common examples include microwave ovens, range hoods, older ceiling fans, appliances. Fixture type is only a clue; confirm the code on the bulb, socket, fixture label, or manufacturer documentation.
Can I choose a E17 replacement by appearance alone?
No. Match the E17 connection first, then verify voltage, actual input wattage, bulb dimensions, fixture restrictions, controls, and any enclosure or location rating required by the installation.