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Diodes Incorporated SMAZ30-13-F
- Part No.:
- SMAZ30-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAZ30-13-F.pdf
- Description:
- DIODE ZENER 30V 1W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:89,620
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Product details
Overview
SMAZ30-13-F from Diodes Incorporated is a 1.0W surface-mount Zener diode with nominal zener voltage of 30.0V (min 28.5V, max 31.5V), ±5% tolerance, 25mA maximum zener test current, and 250Ω maximum zener impedance at IZT. It provides precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial sensor interfaces.
For engineers reviewing the SMAZ30-13-F datasheet, SMAZ30-13-F pinout, SMAZ30-13-F application, or SMAZ30-13-F equivalent, key selection criteria include zener voltage accuracy at 25mA, thermal resistance (RθJA = 100°C/W), cathode-band polarity marking, SMA package compatibility with automated SMT lines, and compliance with RoHS, halogen-free, and antimony-free "Green" requirements.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable output voltage across varying load and line conditions. Its 30V nominal regulation point targets mid-range industrial power rails, with 1.0W power dissipation rated up to +50°C ambient before linear derating begins at 10mW/°C.
Designed for surface-mount assembly on FR-4 PCBs using standard SMA pad layout, it features a molded plastic case (UL 94V-0), matte tin-plated terminals, and moisture sensitivity level 1 per J-STD-020 - enabling reflow compatibility without dry-pack requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nom) | 30.0V - precise regulation point for 28–32V system references |
| Zener Voltage Range | 28.5V to 31.5V - ±5% tolerance ensures predictable clamping in safety-critical overvoltage circuits |
| Test Current (IZT) | 25mA - standardized bias condition for measuring VZ and ZZT |
| Zener Impedance (ZZT) | 250Ω max @ IZT - low dynamic resistance maintains regulation stability under transient load changes |
| Power Dissipation (PD) | 1.0W @ TA ≤ +50°C - supports compact board layouts without forced cooling in ambient-limited enclosures |
| Thermal Resistance (RθJA) | 100°C/W - defines junction-to-ambient temperature rise per watt, critical for reliability modeling |
| Reverse Leakage (IR) | 0.5µA @ VR = 22.8V - minimal off-state current preserves efficiency in high-impedance bias networks |
Pinout & Package
Package: SMA (Surface Mount Axial) - molded plastic case, 4.00–4.60mm length, 2.29–2.92mm width, 1.27–1.63mm height; cathode identified by band or notch on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential node in shunt regulator configuration |
| Cathode | Reverse breakdown terminal / high-side connection | Connected to regulated rail or input node; marked by visible band for orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W Power Rating | Enables robust overvoltage clamping in 24V industrial systems without external heatsinking |
| ±5% Zener Tolerance | Reduces need for post-assembly calibration in cost-sensitive power supply designs |
| RoHS & Halogen-Free Compliance | Meets EU Directive 2011/65/EU and green manufacturing requirements for global OEM shipments |
| SMA Package with Level 1 MSL | Supports standard reflow profiles without baking, lowering production overhead in high-volume SMT lines |
Applications
| Industrial Power Supply Feedback | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 30V threshold to TL431-like control ICs. Use Value: Maintains ±1% output regulation across line/load variations due to tight VZ tolerance and low ZZT. | Use Scenario: Generating stable reference for analog sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Low-drift DC reference source for ADC biasing and op-amp offset correction. Use Value: Delivers <0.5µA leakage at 22.8V, minimizing error contribution in µA-level bias networks. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Protecting microcontroller I/O pins from transients on 24V CAN bus interface lines. IC Role / Device Role / Timing Role: Fast-acting crowbar element limiting voltage to 31.5V peak during surge events. Use Value: Absorbs 1.0W pulse energy without degradation, verified per IEC 61000-4-5 surge immunity testing. | Use Scenario: Setting trip point for comparator-based battery pack overvoltage cutoff at 30V nominal. IC Role / Device Role / Timing Role: Precision threshold element defining hysteresis window for charge control logic. Use Value: Enables 1.5V total window (28.5–31.5V) without trimming resistors, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | 30V nominal, ±5%, 300mW rating, SOT-23 package | Lower power handling limits use to sub-100mA bias networks | Select when space-constrained PCBs require smaller footprint and thermal load is <300mW |
| 1N4745A | 30V nominal, ±5%, 1.0W rating, DO-41 through-hole package | Requires wave soldering or hand assembly; incompatible with fully SMT processes | Select only for legacy through-hole designs or prototyping where rework access is prioritized |
Compared with BZX84-C30LT1G and 1N4745A, SMAZ30-13-F uniquely combines 1.0W SMT capability, SMA-level ruggedness, and industry-standard green compliance - making it optimal for volume-manufactured industrial controllers requiring automated assembly and long-term supply stability.
Availability
SMAZ30-13-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU reference circuits, overvoltage protection clamps, and programmable threshold detectors requiring stable component supply across multi-year production cycles.
Supply support for SMAZ30-13-F 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, marketing, and sales operations worldwide.
The SMAZ series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in industrial, automotive, and computing power systems.
FAQ
What is the maximum continuous power dissipation for SMAZ30-13-F at +70°C ambient?
At +70°C ambient, SMAZ30-13-F is derated linearly from its 1.0W rating at +50°C, losing 10mW per °C above that point. This yields 1.0W − (20°C × 0.01W/°C) = 0.8W maximum continuous dissipation. Derating follows the curve in Figure 1 of DS18015 Rev. 19-2, validated on standard FR-4 PCB with specified pad layout.
Does SMAZ30-13-F have a specified zener impedance at 100mA test current?
No - the datasheet specifies maximum zener impedance (ZZT) of 250Ω only at the rated test current of 25mA. At 100mA, differential resistance drops significantly (see Figure 5), but no guaranteed maximum value is provided. Designers should use the 25mA condition for worst-case regulation analysis.
How is polarity identified on the SMAZ30-13-F package?
Polarity is marked by a cathode band - a visible opaque stripe near one end of the SMA molded body. The terminal adjacent to this band is the cathode; the opposite end is the anode. This matches the standard SMA diode marking convention and is confirmed in the "Marking Information" section of DS18015.
Is SMAZ30-13-F suitable for use in life support equipment?
No - Diodes Incorporated explicitly prohibits use of SMAZ30-13-F in life support devices or systems without express written approval from its CEO, as stated in the "LIFE SUPPORT" notice of DS18015. Its qualification does not cover safety-critical medical applications requiring ASIL or ISO 13485 compliance.
SMAZ30-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-F FAQ
1.How can I place an order for SMAZ30-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAZ30-13-F 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-F reliable?
The price and inventory of SMAZ30-13-F 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-F is usually 5 days.
3.What payment methods are accepted for SMAZ30-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAZ30-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAZ30-13-F?
SMAZ30-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAZ30-13-F 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-F?
For technical support, including SMAZ30-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAZ30-13-F requirements.
6.How does Aetrix verify that SMAZ30-13-F is sourced from the original manufacturer or authorized distributors?
All SMAZ30-13-F 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-F meets industry standards.
7.What is the process for return or replacement of SMAZ30-13-F?
All SMAZ30-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAZ30-13-F, 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-F part is unused and in its original packaging.
Return procedure for SMAZ30-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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