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Diodes Incorporated SMAZ30-13
- Part No.:
- SMAZ30-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAZ30-13.pdf
- Description:
- DIODE ZENER 30V 1W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,982
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Product details
Overview
SMAZ30-13 from Diodes Incorporated is a 1.0W surface-mount Zener diode with a nominal zener voltage of 30.0V (range: 28.5–31.5V), ±5% tolerance, 15Ω maximum zener impedance at 15mA test current, and 0.5µA maximum reverse leakage at 22.8V. It is used for precision voltage regulation and overvoltage protection in DC power rails and reference circuits.
For engineers reviewing the SMAZ30-13 datasheet, SMAZ30-13 pinout, SMAZ30-13 application, or SMAZ30-13 equivalent, key selection criteria include zener voltage accuracy, thermal derating above +50°C, junction-to-ambient thermal resistance (100°C/W), and compliance with RoHS, halogen-free, and antimony-free "Green" requirements.
Technical Context
This device operates as a two-terminal voltage reference, maintaining stable regulation across its specified zener current range (15mA typical test current). Its 1.0W power dissipation rating is valid at +25°C ambient and linearly derates by 10mW/°C above +50°C when mounted on an FR-4 PCB per Diodes Inc.'s recommended pad layout.
The SMA package provides a molded plastic body with UL 94V-0 flammability rating and matte tin-plated terminals solderable per MIL-STD-202, Method 208. Polarity is indicated by a cathode band, and moisture sensitivity is rated Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 30.0V - precise regulation point under 15mA test current |
| Zener Voltage Range | 28.5V to 31.5V - ensures design margin for ±5% tolerance at +25°C |
| Zener Impedance | 15Ω max @ IZT = 15mA - low dynamic resistance for stable output under load variation |
| Power Dissipation | 1.0W @ TA = +50°C - usable continuous power before thermal derating begins |
| Thermal Resistance θJA | 100°C/W - defines temperature rise above ambient per watt dissipated on standard FR-4 board |
| Reverse Leakage Current | 0.5µA max @ VR = 22.8V - minimal quiescent current in standby regulation mode |
| Forward Voltage | 1.2V @ IF = 200mA - enables use as clamp or protection diode in forward bias |
Pinout & Package
Package: SMA (Surface Mount Assembly), molded plastic case with UL 94V-0 rating; dimensions: 4.00–4.60mm (L) × 2.29–2.92mm (W) × 1.27–1.63mm (H); weight ≈ 0.064g; polarity marked by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to lower-potential node in zener regulation | Accepts forward current up to 200mA; forms cathode-referenced voltage clamp |
| Cathode | Negative terminal in forward bias; higher-potential node in zener operation | Connected to regulated voltage rail; zener breakdown occurs between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W Power Rating | Enables robust voltage clamping in industrial power supplies without forced cooling |
| ±5% Zener Tolerance | Supports tight regulation in feedback loops for switching regulators and analog references |
| Lead-Free & RoHS Compliant | Meets global environmental directives and eliminates lead contamination risk in reflow assembly |
| Halogen- and Antimony-Free | Complies with "Green" standards (<900ppm Br/Cl, <1000ppm Sb) for eco-sensitive applications |
| Level 1 Moisture Sensitivity | Allows unlimited floor life before reflow-no baking required prior to assembly |
Applications
| Industrial Power Supply Regulation | Automotive ECU Reference Voltage |
|---|---|
Use Scenario: Stabilizing feedback voltage in 24V-input buck converter output stage. IC Role / Device Role / Timing Role: Zener diode providing precise 30V reference for optocoupler-based isolation feedback. Use Value: Maintains ±1.5V regulation window over temperature and line variation, ensuring ±3% output accuracy. | Use Scenario: Generating stable bias voltage for sensor signal conditioning circuitry in engine control units. IC Role / Device Role / Timing Role: Voltage reference source for analog front-end op-amps and ADC reference dividers. Use Value: Delivers <0.5µA leakage at 22.8V, minimizing error contribution to 12-bit sensor measurements. |
| Telecom Line Surge Protection | Programmable Logic Controller I/O Protection |
Use Scenario: Clamping transient overvoltage on -48V telecom backplane rails during lightning-induced surges. IC Role / Device Role / Timing Role: Secondary shunt protector downstream of primary TVS, absorbing residual energy after fast transient suppression. Use Value: Withstands 1.0W peak pulse power and exhibits 15Ω dynamic impedance to limit clamping overshoot below 35V. | Use Scenario: Protecting 24V digital input channels against field-wiring reversals and inductive kickback. IC Role / Device Role / Timing Role: Reverse-polarity and overvoltage clamp placed across PLC input optocoupler LED anode-cathode. Use Value: Blocks >22.8V reverse voltage while allowing normal 24V logic detection via <0.5µA leakage current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | 0.3W rating, SOT-23 package, 30V ±5%, 80Ω Zzt @ 5mA | Lower power handling; suited for low-current biasing, not rail clamping | Select when board space is constrained and dissipation remains <300mW |
| 1N4745A | 1.0W through-hole DO-41 package, 30V ±5%, 35Ω Zzt @ 22mA | Requires through-hole assembly; higher Zzt reduces regulation precision at low currents | Select for legacy through-hole designs or where manual repairability is prioritized |
Compared with BZX84-C30LT1G and 1N4745A, SMAZ30-13 offers superior thermal performance (100°C/W vs. ~200°C/W for SOT-23), tighter low-current regulation (15Ω vs. 80Ω), and surface-mount compatibility-making it optimal for automated high-power density designs.
Availability
SMAZ30-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU reference voltage generation, and telecom line surge protection requiring stable component supply and full RoHS/Green compliance.
Supply support for SMAZ30-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMAZ series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in space-constrained, thermally demanding industrial and automotive environments.
FAQ
What is the maximum continuous zener current for SMAZ30-13 at +70°C ambient?
At +70°C ambient, the device's power dissipation must be derated from 1.0W at +50°C by 10mW/°C, resulting in 0.8W max. With VZ = 30V, the maximum continuous zener current is 26.7mA (0.8W ÷ 30V). This assumes proper PCB copper area per Diodes' recommended layout.
Does SMAZ30-13 have a specified capacitance value for high-frequency filtering applications?
No capacitance specification is provided in the DS18015 datasheet. Figure 2 shows typical total capacitance curves for related SMAZ devices (e.g., SMAZ12, SMAZ27), but no discrete value is given for SMAZ30-13. For RF bypass or noise filtering, a dedicated capacitor should be used in parallel.
Can SMAZ30-13 be used in place of a 30V Zener in a linear regulator error amplifier feedback network?
Yes-its 15Ω zener impedance at 15mA and ±5% voltage tolerance support stable closed-loop regulation. However, ensure the feedback network draws ≤15mA to maintain regulation accuracy; higher currents increase voltage deviation due to dynamic resistance.
Is the SMAZ30-13 marking code standardized, and how is it decoded?
Yes-the marking code for SMAZ30-13 is "ZJQ", printed on the device body. Per DS18015 Table 1, "ZJQ" uniquely identifies the 30.0V variant within the SMAZ family. Date code follows as YWW (e.g., "623" = 2016, week 23).
SMAZ30-13 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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 22.8 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
SMAZ30-13 FAQ
1.How can I place an order for SMAZ30-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAZ30-13 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 SMAZ30-13 reliable?
The price and inventory of SMAZ30-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAZ30-13 is usually 5 days.
3.What payment methods are accepted for SMAZ30-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAZ30-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAZ30-13?
SMAZ30-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAZ30-13 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 SMAZ30-13?
For technical support, including SMAZ30-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAZ30-13 requirements.
6.How does Aetrix verify that SMAZ30-13 is sourced from the original manufacturer or authorized distributors?
All SMAZ30-13 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 SMAZ30-13 meets industry standards.
7.What is the process for return or replacement of SMAZ30-13?
All SMAZ30-13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAZ30-13, 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 SMAZ30-13 part is unused and in its original packaging.
Return procedure for SMAZ30-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAZ30-13 Tags
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