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JAN1N4478 The JAN1N4478 is a 1.5W Zener diode from Microchip Technology in a Through Hole DO-41 package. It features ±5% tolerance and operates from -65°C to 175°C.
Mfr Part #:

JAN1N4478

Available from 2 distributors
Mfr Name: Microchip Technology
Microchip Technology
The JAN1N4478 is a 1.5W Zener diode from Microchip Technology in a Through Hole DO-41 package. It features ±5% tolerance and operates from -65°C to 175°C.
Total Stock: 10,001 pcs
$ Price Range: $5.85 - $5.86

JAN1N4478 Available from 2 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
10,000 pcs
10000 pcs On Request 1 On Request On Request On Request On Request 2026-06-29 21:33:16
Non-Authorised Inventory information
1 pcs
1 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request

JAN1N4478 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Impedance (Max) (Zzt)
Lead Style
Military Grade
Mounting Type
Operating Temperature
Power
SVHC Present
Supplier Device Package
Tape & Reel
Tolerance
Voltage

JAN1N4478 Description

Short technical summary and product information.

The JAN1N4478 is a Zener diode designed for voltage regulation and protection applications. It offers a power dissipation of 1.5W and a forward voltage of 1.5V at 1A. The device has a maximum zener impedance of 27Ω and a reverse leakage current of 50nA at 28.8V. It is housed in a Through Hole DO-41 package (also known as DO-204AL, DO041, Axial), making it suitable for through-hole mounting on PCBs. The operating temperature range is -65°C to 175°C, allowing use in harsh environments. The diode is RoHS3 compliant (unverified) and has an MSL of 1 (Unlimited).

JAN1N4478 Quick Information

Product Type: Zener Diode
Canonical Name: JAN1N4478 Zener Diode, 1.5W, Through Hole, DO-41
Subcategory: Single Zener Diode

JAN1N4478 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

JAN1N4478 Estimated Pricing

Qty Low High
1+ $5.86 $5.86
10+ $5.85 $5.85

Estimated market price range - modelled values for guidance only, not live distributor offers.

JAN1N4478 Features

  • 1.5W power dissipation rating.
  • ±5% tolerance for precise regulation.
  • Through Hole DO-41 package.
  • Operating temperature range -65°C to 175°C.
  • Low reverse leakage current of 50nA.

JAN1N4478 Applications

  • Used in voltage regulation circuits.
  • Ideal for overvoltage protection.
  • Suitable for industrial temperature environments.
  • Common in power supply designs.

JAN1N4478 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the power dissipation of the JAN1N4478?

1.5W.

What is the forward voltage?

1.5V at 1A.

What is the tolerance?

±5%.

What is the operating temperature range?

-65°C to 175°C.

What is the package type?

Through Hole DO-41 (DO-204AL, DO041, Axial).

What is the reverse leakage current?

50nA at 28.8V.

What is the zener impedance?

27Ω maximum.

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