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MMSZ5229B MMSZ5229B is a 4.3V Zener diode from On Semiconductor with 500mW power dissipation. It comes in a SOD-123 surface mount package.
Mfr Part #:

MMSZ5229B

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
MMSZ5229B is a 4.3V Zener diode from On Semiconductor with 500mW power dissipation. It comes in a SOD-123 surface mount package.
✓ Total Stock: 67 pcs
$ Price Range: $0.03

MMSZ5229B Available from 1 distributor

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
MW.FEP S.p.A. ✓
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67 pcs
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67 pcs On Request 1 On Request On Request On Request On Request On Request
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MMSZ5229B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Impedance (Max) (Zzt)
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Tape & Reel
Tolerance
Voltage
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MMSZ5229B Description

Short technical summary and product information.

The MMSZ5229B is a Zener diode from On Semiconductor designed for voltage regulation and protection applications. It offers a nominal Zener voltage of 4.3V with a tolerance of ±5%, and a maximum power dissipation of 500mW at 25°C ambient temperature.

 

This diode features a low Zener impedance of 22Ω at 20mA test current, ensuring stable voltage regulation. The forward voltage is 0.9V maximum at 10mA. Reverse leakage current is limited to 5µA at 1V reverse voltage. The device operates over a wide temperature range of -55°C to 150°C.

 

Housed in a compact SOD-123 surface mount package, the MMSZ5229B is suitable for automated assembly and space-constrained designs. The thermal resistance from junction to ambient is 340°C/W, providing adequate heat dissipation for typical applications.

MMSZ5229B Quick Information

Product Type: Zener Diode
Series: MMSZ5226B-5257B
Canonical Name: MMSZ5229B Zener Diode, 4.3V, 500mW, SOD-123
Subcategory: Single Zener Diode

MMSZ5229B Compliance

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

MMSZ5229B Estimated Pricing

Qty Low High
39,000+ $0.03 $0.03

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

MMSZ5229B Features

  • Nominal Zener voltage of 4.3V with ±5% tolerance.
  • Maximum power dissipation of 500mW at 25°C.
  • Low Zener impedance of 22Ω at 20mA test current.
  • Surface mount SOD-123 package for automated assembly.
  • Wide operating temperature range from -55°C to 150°C.

MMSZ5229B Applications

  • Used for voltage regulation in low-power circuits.
  • Ideal for overvoltage protection and clamping diodes.
  • Suitable for portable and battery-powered devices.
  • Common in power supply and reference voltage circuits.

MMSZ5229B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the Zener voltage of MMSZ5229B?

4.085V minimum, 4.3V typical, 4.515V maximum at 20mA test current.

What is the power dissipation of MMSZ5229B?

500mW maximum at 25°C ambient temperature.

What is the forward voltage of MMSZ5229B?

0.9V maximum at 10mA forward current.

What is the reverse leakage current of MMSZ5229B?

5µA maximum at 1V reverse voltage.

What is the operating temperature range of MMSZ5229B?

-55°C to 150°C.

What package does MMSZ5229B come in?

SOD-123 surface mount package.

What is the Zener impedance of MMSZ5229B?

22Ω maximum at 20mA test current.

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