Key facts
- Brand
- Fairchild
- Model
- MMSZ5257B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Fairchild Semiconductor MMSZ5226B-MMSZ5257B Series Zener Diodes Datasheet
This document is a technical datasheet for the Fairchild Semiconductor MMSZ5226B through MMSZ5257B series of zener diodes. The components are housed in an SOD-123 package with a tolerance of 5% and feature a forward voltage maximum of 0.9V at 10mA.
The datasheet provides absolute maximum ratings, including a power dissipation of 500mW at 25°C and a thermal resistance (Junction to Ambient) of 340°C/W for FR-4 or FR-5 substrates. It details electrical characteristics such as zener voltage, dynamic impedance, and reverse current across the full series range.
Fairchild MMSZ5257B specifications
| Power Dissipation @25°C | 500 mW |
|---|---|
| Thermal Resistance, Junction to Ambient (FR-4/FR-5) | 340 °C/W |
| Storage Temperature Range | -55 to +150 °C |
| Operating Junction Temperature | +150 °C |
| Package Type | SOD-123 |
| Forward Voltage (Max @ IF=10mA) | 0.9V |
Source: Fairchild Semiconductor MMSZ5226B-MMSZ5257B Series Zener Diodes Datasheet
All Fairchild MMSZ5257B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum power dissipation for these zener diodes?
The maximum power dissipation at 25°C is 500 mW.
From: Fairchild Semiconductor MMSZ5226B-MMSZ5257B Series Zener Diodes Datasheet
What is the thermal resistance from junction to ambient?
The thermal resistance (Junction to Ambient) for FR-4 or FR-5 substrates is 340 °C/W.
From: Fairchild Semiconductor MMSZ5226B-MMSZ5257B Series Zener Diodes Datasheet
What is the maximum power dissipation for the MMSZ5226B‑MMSZ5257B Zener diodes?
The maximum power dissipation is 500 mW at a 25 °C ambient temperature.
What temperature range can the diodes be stored at?
They can be stored from –55 °C up to +150 °C.