E Series Lamp Base — E10 E12 E14 E17 E26 E27 E39 E40 Edison Screw Socket

E Series Edison Screw Lamp Bases & Sockets — E10 to E40 for LED, CFL & Halogen Lighting

The E series Edison screw lamp base is the world's most widely used lamp socket standard, named after Thomas Edison and used in virtually every country for residential, commercial, and industrial lighting. The "E" designation followed by a number indicates the outer diameter of the screw thread in millimeters: E10 (10mm, miniature), E12 (12mm, candelabra), E14 (14mm, small Edison screw / SES), E17 (17mm, intermediate), E26 (26mm, medium/standard North American), E27 (27mm, standard European/Asian), E39 (39mm, mogul North American), and E40 (40mm, mogul European/Asian). This collection provides the complete E series lamp base ecosystem for lighting manufacturers, repair technicians, and OEM assembly.

E Series Size Reference Guide

• E10 — 10mm diameter. Miniature screw base for indicator lamps, flashlights, Christmas lights, and low-voltage signal lamps.
• E12 — 12mm diameter. Candelabra base for decorative chandelier bulbs, night lights, and small appliance lamps (North American standard).
• E14 — 14mm diameter. Small Edison Screw (SES). European candelabra standard for decorative, refrigerator, and range hood lamps.
• E17 — 17mm diameter. Intermediate base for ceiling fans, appliances, and some decorative fixtures (North American).
• E26 — 26mm diameter. Medium base — the standard household lamp base in North America (120VAC).
• E27 — 27mm diameter. Standard Edison Screw (ES) — the universal household lamp base in Europe, Asia, Australia, and most of the world (220–240VAC).
• E39 — 39mm diameter. Mogul base for high-wattage HID lamps (North American standard): metal halide, high-pressure sodium, mercury vapor.
• E40 — 40mm diameter. Goliath/Mogul base for high-wattage industrial and street lighting (European/Asian standard): HID, LED corn lamps, industrial high-bay.

Key Technical Specifications

• Materials: Ceramic (high-temperature, for halogen/HID), phenolic (standard, for LED/CFL), plastic (low-cost, for LED)
• Rated voltage: 250V (standard) / 660V (ceramic, for HID)
• Rated current: 2A (E10/E12/E14) / 4A (E17/E26/E27) / 10A (E39/E40)
• Mounting: Panel mount (with nut), wire leads, or PCB mount (E10)
• Certifications: CE, RoHS

Complete Product Range in This Collection

This collection includes: E10 miniature screw bases (panel mount, wire leads, PCB mount), E12 candelabra bases (phenolic, wire leads), E14 SES bases (ceramic and phenolic, panel mount and wire leads), E17 intermediate bases, E26 medium bases (phenolic, for North American 120VAC), E27 standard bases (ceramic, phenolic, and plastic; panel mount, wire leads, and pendant), E39 mogul bases (ceramic, for HID lamps), and E40 goliath bases (ceramic, for industrial HID and LED corn lamps).

Ideal Applications

• E10: Indicator lamps, flashlights, Christmas/fairy lights, model railway lighting, low-voltage signal lamps
• E12/E14: Chandelier and candelabra decorative fixtures, refrigerator lamps, range hood lamps, European decorative lighting
• E17: Ceiling fan light kits, appliance lamps, intermediate-base fixtures
• E26/E27: Standard household LED, CFL, and halogen bulb replacement sockets; pendant light fixtures; table lamp repair; OEM luminaire assembly
• E39/E40: Industrial high-bay fixtures, street lighting, HID lamp replacement sockets; LED corn lamp retrofit bases

E Series Lamp Base Buying Guide

Step 1 — Identify the correct size: Measure the diameter of the screw thread on your existing bulb or socket. The E number equals the thread diameter in millimeters. E27 (27mm) is the most common worldwide; E26 (26mm) is the North American standard.

Step 2 — Choose material: Ceramic bases withstand high temperatures (up to 300°C+) and are required for halogen and HID lamps. Phenolic bases are suitable for LED and CFL lamps (up to 130°C). Plastic bases are lowest cost, suitable for LED lamps only (up to 80°C).

Step 3 — Choose mounting style: Panel mount (with threaded bushing and nut) for fixture installation. Wire leads for pendant and hardwired installations. PCB mount (E10 only) for indicator lamp assemblies.

Step 4 — Verify voltage rating: Standard phenolic and plastic bases are rated 250V, suitable for 220–240VAC. Ceramic bases are rated 660V, suitable for HID lamps. For 120VAC North American applications, use E26 bases rated for 250V.

Why Choose Yoeruyo for E Series Lamp Bases?

Yoeruyo stocks the complete E series lamp base range — from E10 miniature to E40 goliath — in ceramic, phenolic, and plastic materials, with multiple mounting configurations. All products are CE and RoHS certified. Available in quantities from 10pcs for repair and prototyping to 500pcs+ for OEM luminaire manufacturing. Custom configurations and bulk pricing available on request.

Frequently Asked Questions

Q: What is the difference between E26 and E27?
A: E26 (26mm diameter) is the North American standard for 120VAC household lamps. E27 (27mm diameter) is the European/Asian/Australian standard for 220–240VAC. The thread pitch is the same, so E26 and E27 bulbs will physically fit each other's sockets, but voltage ratings differ. Always use the correct voltage-rated bulb for your electrical system.

Q: What is the difference between E39 and E40?
A: E39 (39mm) is the North American mogul base standard for high-wattage HID lamps. E40 (40mm) is the European/Asian mogul standard. They are not interchangeable due to the 1mm diameter difference.

Q: Can I use a ceramic E27 base for LED bulbs?
A: Yes. Ceramic bases are compatible with all bulb types including LED, CFL, halogen, and HID. They are overspecified for LED use but provide maximum durability and temperature resistance.

Q: What mounting style should I choose for a pendant light fixture?
A: Choose a wire-lead base (keyless lampholder with leads) for pendant and hardwired installations. Panel-mount bases with threaded bushings are used for fixture shells and canopies.

Q: Are E10 bases available in PCB-mount versions?
A: Yes. E10 PCB-mount bases solder directly to the PCB and accept standard E10 miniature screw bulbs.