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MMBZ5229B The MMBZ5229B is a 4.3V Zener diode from ON Semiconductor with 350mW power dissipation and ±5% tolerance. It is housed in a surface-mount SOT-23-3 package.
Mfr Part #:

MMBZ5229B

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The MMBZ5229B is a 4.3V Zener diode from ON Semiconductor with 350mW power dissipation and ±5% tolerance. It is housed in a surface-mount SOT-23-3 package.
Total Stock: 5,113 pcs
$ Price Range: $0.04

MMBZ5229B 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
3,013 pcs
3013 pcs On Request 1 On Request On Request 10+ On Request On Request
Non-Authorised Inventory information
2,100 pcs
2100 pcs On Request 1 On Request On Request On Request On Request On Request

MMBZ5229B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Impedance (Max) (Zzt)
Mounting Type
Operating Temperature
Power
Supplier Device Package
Tape & Reel
Tolerance
Voltage
Voltage - Forward (Vf) (Max) @ If

MMBZ5229B Description

Short technical summary and product information.

The MMBZ5229B is a Zener diode from ON Semiconductor, part of the MMBZ5221B-MMBZ5257B series. It provides a nominal Zener voltage of 4.3V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 350mW and features a maximum Zener impedance of 22Ω at a test current of 20mA. Reverse leakage current is limited to 5µA at a reverse voltage of 1V. The forward voltage is 0.9V maximum at 10mA forward current. Operating temperature range is -55°C to 150°C. This diode is designed for surface-mount assembly and is available in a SOT-23-3 package (also known as TO-236-3 or SC-59). Typical applications include voltage regulation, overvoltage protection, and reference voltage generation in low-power circuits. The device is RoHS3 compliant and has a moisture sensitivity level of 1 (unlimited).

MMBZ5229B Quick Information

Product Type: Zener Diode
Series: MMBZ5221B-MMBZ5257B
Canonical Name: MMBZ5229B Zener Diode, 4.3V, 350mW, SOT-23-3
Subcategory: Single Zener Diode

MMBZ5229B Compliance

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

MMBZ5229B Estimated Pricing

Qty Low High
36,000+ $0.04 $0.04

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

MMBZ5229B Features

  • Nominal Zener voltage of 4.3V.
  • Maximum power dissipation of 350mW.
  • ±5% tolerance on Zener voltage.
  • Surface-mount SOT-23-3 package.
  • Operating temperature range -55°C to 150°C.

MMBZ5229B Applications

  • Used for voltage regulation in low-power circuits.
  • Provides overvoltage protection in portable devices.
  • Serves as a voltage reference in analog circuits.
  • Ideal for clamping applications in signal lines.

MMBZ5229B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of the MMBZ5229B?

4.3V nominal.

What is the power dissipation rating?

350mW maximum.

What is the tolerance of the Zener voltage?

±5%.

What is the forward voltage?

0.9V maximum at 10mA.

What is the reverse leakage current?

5µA maximum at 1V reverse voltage.

What is the operating temperature range?

-55°C to 150°C.

What package is the MMBZ5229B available in?

SOT-23-3 (also TO-236-3, SC-59).

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