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Diodes Incorporated SMAZ24-13
- Part No.:
- SMAZ24-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAZ24-13.pdf
- Description:
- DIODE ZENER 24V 1W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,327
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Product details
Overview
SMAZ24-13 from Diodes Incorporated is a 1.0W surface-mount Zener diode with nominal zener voltage of 24.0V (±5% tolerance), 25mA maximum zener test current, 180Ω maximum zener impedance at 15mA, and 0.5µA maximum reverse leakage at 18.2V. It features SMA package, cathode band polarity marking, and is rated for operation from –65°C to +150°C.
For engineers reviewing the SMAZ24-13 datasheet, SMAZ24-13 pinout, SMAZ24-13 application, or SMAZ24-13 equivalent, key selection criteria include zener voltage accuracy, power derating above +50°C, thermal resistance (RθJA = 100°C/W), and compliance with RoHS, halogen-free, and antimony-free "Green" requirements.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to provide stable voltage regulation or reference. Its 24.0V nominal zener voltage is specified at IZT = 25mA, with ZZT ≤ 180Ω and ZZK ≤ 150Ω at low-current knee region (IZK = 1.0mA).
Thermal performance is defined for mounting on FR-4 PCB (1" × 0.85", 0.062" thick) per Diodes Inc. pad layout. Power dissipation derates linearly at 10mW/°C above +50°C, supporting reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.0V nominal, 22.8–25.2V range at 25mA - defines precise regulation point under standard test conditions |
| Power Dissipation (PD) | 1.0W at TA = +25°C, derates to 0.5W at TA = +100°C - sets maximum continuous power handling on standard PCB |
| Zener Impedance (ZZT) | ≤180Ω at IZT = 25mA - determines output voltage stability under load variation |
| Reverse Leakage (IR) | ≤0.5µA at VR = 18.2V - ensures minimal quiescent current in standby regulation circuits |
| Thermal Resistance (RθJA) | 100°C/W - quantifies junction-to-ambient temperature rise per watt, critical for thermal design margin |
| Operating Temperature | –65°C to +150°C - supports industrial and automotive under-hood applications without derating |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic case (UL 94V-0), cathode indicated by band or notch, weight ≈ 0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in regulation circuit; reverse-biased during normal operation |
| Cathode | Zener breakdown terminal | Connected to higher-potential node; maintains regulated voltage drop across load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating | Enables use in medium-power voltage clamp and reference circuits without external heatsinking |
| ±5% VZ tolerance | Supports cost-sensitive designs where tight regulation is balanced against BOM cost |
| Lead-free, RoHS-compliant finish | Meets global environmental compliance mandates and automated reflow soldering requirements |
| Halogen- and antimony-free "Green" construction | Complies with stringent material restrictions (Br+Cl <1500ppm, Sb <1000ppm) for eco-design programs |
Applications
| Overvoltage Protection in DC Power Rails | Low-Power Voltage Reference for ADCs |
|---|---|
Use Scenario: Clamping transient surges on 24V industrial control bus lines. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy to ground. Use Value: Limits rail voltage to ≤25.2V (max VZ) during ESD or inductive kick events, protecting downstream logic and analog circuitry. | Use Scenario: Providing stable reference voltage for 12-bit SAR ADC in sensor signal conditioning. IC Role / Device Role / Timing Role: Passive voltage reference source with low dynamic impedance (180Ω) at 25mA bias. Use Value: Delivers <0.5µA leakage and <0.2V regulation deviation over temperature, enabling ±0.1% reference accuracy. |
| LED Current Regulation in Constant-Voltage Supplies | Microcontroller Reset Circuit Voltage Threshold |
Use Scenario: Setting forward current for high-brightness LED strings powered from 24V SMPS. IC Role / Device Role / Timing Role: Zener used as shunt regulator to fix voltage across current-setting resistor. Use Value: Maintains consistent LED brightness across input variations due to 24.0V ±5% regulation and low thermal drift (–65°C to +150°C). | Use Scenario: Generating reset threshold for 3.3V microcontroller monitoring a 24V auxiliary supply. IC Role / Device Role / Timing Role: Zener + resistor divider establishes precise 2.4V reset trigger level. Use Value: Enables accurate brown-out detection with <0.5µA leakage ensuring negligible divider current error. |
Availability
SMAZ24-13 is available at Aetrix Electronics and suitable for overvoltage protection, precision voltage reference, LED current regulation, and microcontroller reset circuit applications requiring stable component supply and full RoHS/Green compliance.
Supply support for SMAZ24-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.
The SMAZ series belongs to Diodes Inc.'s surface-mount Zener diode product line, designed specifically for automated assembly and robust voltage regulation in space-constrained industrial and automotive environments.
FAQ
What is the maximum power dissipation of SMAZ24-13 at +75°C ambient?
At +75°C ambient, SMAZ24-13 dissipates 0.75W. Derating begins at +50°C at 10mW/°C, so 25°C of rise above +50°C reduces PD by 250mW from the base 1.0W rating. This value assumes mounting on a standard FR-4 PCB per Diodes Inc. package outline recommendations.
How is polarity identified on the SMAZ24-13 package?
Polarity is marked by a cathode band (visible ink stripe) on the body of the SMA package. The banded end is the cathode; the opposite end is the anode. This matches standard diode marking convention and is verified in Diodes Inc.'s DS18015 mechanical drawings and top-view marking diagram.
Does SMAZ24-13 meet JEDEC moisture sensitivity level requirements?
Yes - SMAZ24-13 is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. This enables direct placement in standard SMT lines without dry-pack or floor-life constraints.
Can SMAZ24-13 replace SMAJ24A in surge protection circuits?
No - SMAJ24A is a 400W transient voltage suppressor (TVS) optimized for high-energy ESD and lightning transients, while SMAZ24-13 is a 1.0W Zener diode for steady-state regulation. Their IZM, clamping behavior, and peak pulse ratings differ fundamentally; substitution would compromise surge immunity.
SMAZ24-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
SMAZ24-13 FAQ
1.How can I place an order for SMAZ24-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAZ24-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMAZ24-13 reliable?
The price and inventory of SMAZ24-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAZ24-13 is usually 5 days.
3.What payment methods are accepted for SMAZ24-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAZ24-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAZ24-13?
SMAZ24-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAZ24-13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMAZ24-13?
For technical support, including SMAZ24-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAZ24-13 requirements.
6.How does Aetrix verify that SMAZ24-13 is sourced from the original manufacturer or authorized distributors?
All SMAZ24-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAZ24-13 meets industry standards.
7.What is the process for return or replacement of SMAZ24-13?
All SMAZ24-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAZ24-13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMAZ24-13 part is unused and in its original packaging.
Return procedure for SMAZ24-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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