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Diodes Incorporated SMAZ12-13-F
- Part No.:
- SMAZ12-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAZ12-13-F.pdf
- Description:
- DIODE ZENER 12V 1W SMA
- Quantity:
- Payment:
- Shipping:
Inventory:52,499
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Product details
Overview
SMAZ12-13-F from Diodes Incorporated is a 1.0W surface-mount Zener diode with a nominal zener voltage of 12.0V (±5% tolerance), 83mA maximum zener current (IZM), and 150Ω dynamic impedance at 7mA test current. It features SMA package, cathode band polarity marking, and is rated for operation from –65°C to +150°C. It is used for voltage regulation and overvoltage protection in DC power rails of industrial control modules.
For engineers reviewing the SMAZ12-13-F datasheet, SMAZ12-13-F pinout, SMAZ12-13-F application, or SMAZ12-13-F equivalent, key selection criteria include zener voltage accuracy, power derating above +50°C, thermal resistance (RθJA = 100°C/W), reverse leakage at VR = 9.1V, and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and line conditions. Its 12.0V nominal regulation is specified at IZT = 7mA, with ZZT = 150Ω ensuring low output impedance for moderate current sourcing.
Thermal performance is defined for mounting on standard FR-4 PCB (1" × 0.85", 0.062" thick) per Diodes Inc. pad layout. Power dissipation linearly derates 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) | 12.0V nominal, 11.4–12.6V range at IZT = 7mA - defines regulation setpoint for feedback or clamp circuits |
| Power Dissipation (PD) | 1.0W @ TA = +25°C, derates to zero at +150°C - sets maximum continuous power handling on standard PCB |
| Zener Impedance (ZZT) | 150Ω @ IZT = 7mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 1.0µA @ VR = 9.1V - ensures minimal quiescent current in standby clamp applications |
| 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 deployment in extended industrial and automotive under-hood environments |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic case (UL 94V-0), cathode identified by band marking. Dimensions: 4.00–4.60mm length (B), 2.29–2.92mm width (A), 1.27–1.63mm height (C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node in regulation or clamp configuration; reverse-biased during normal operation |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential rail to enable reverse-bias regulation at 12V |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating | Enables robust voltage clamping in 12V automotive and industrial supply rails without external heatsinking |
| ±5% VZ tolerance | Provides predictable regulation window for feedback loop compensation and overvoltage threshold setting |
| Lead-free, RoHS-compliant finish | Meets global environmental compliance requirements and supports lead-free reflow soldering (MIL-STD-202) |
| Moisture Sensitivity Level 1 | Eliminates bake-out requirement prior to SMT assembly, reducing manufacturing cost and cycle time |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protects 12V sensor input lines against load dump transients and ESD events. IC Role / Device Role / Timing Role: Zener clamp device placed between signal line and ground to shunt excess energy. Use Value: Limits voltage to ≤12.6V (max VZ) while sustaining 83mA peak current, preventing damage to downstream ADC or MCU inputs. | Use Scenario: Regulates auxiliary 12V rail for microcontroller and CAN transceiver power domains. IC Role / Device Role / Timing Role: Shunt regulator providing stable reference for LDO bias or reset circuitry. Use Value: Maintains 12.0V ±5% under varying load (up to 7mA), with <1.0µA leakage at 9.1V ensuring low sleep-mode current draw. |
| DC-DC Converter Feedback | Telecom Power Supply Clamp |
Use Scenario: Sets output voltage in isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision voltage reference in secondary-side error amplifier circuit. Use Value: Delivers stable 12.0V reference with 150Ω dynamic impedance, minimizing output voltage drift across line/load variations. | Use Scenario: Clamps 12V backup battery interface against overvoltage during charger fault conditions. IC Role / Device Role / Timing Role: Overvoltage protection element in redundant power path management. Use Value: Activates at 11.4V (min VZ) to divert >100mA surge current, limiting rail excursion to safe levels before fuse interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12-7-F | 350mW rating, SOT-23 package, 12V ±5%, RθJA ≈ 300°C/W | Lower power handling; suited for signal-level clamping, not rail regulation | Select when board space is constrained and power dissipation <350mW |
| 1N4742A | 1.0W DO-41 through-hole, 12V ±5%, IZM = 91mA, RθJA ≈ 50°C/W (with heatsink) | Requires through-hole assembly and thermal management; no SMT compatibility | Select for legacy through-hole designs requiring identical electrical specs |
Compared with BZX84-C12-7-F and 1N4742A, SMAZ12-13-F uniquely balances 1.0W SMT power handling, industry-standard SMA footprint, and 100°C/W RθJA - making it optimal for new industrial and automotive PCBs where automated assembly and thermal reliability are co-prioritized.
Availability
SMAZ12-13-F is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and DC-DC converter feedback circuits requiring stable component supply across multi-year production cycles.
Supply support for SMAZ12-13-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, 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 surface-mount voltage regulation and transient suppression in harsh-environment industrial and automotive applications.
FAQ
What is the maximum continuous zener current for SMAZ12-13-F?
The maximum zener current (IZM) is 83mA, calculated as PD / VZ = 1.0W / 12.0V. This value is valid only at TA = +25°C; actual usable current must be reduced per the 10mW/°C derating curve above +50°C ambient temperature.
How is polarity identified on the SMAZ12-13-F package?
Polarity is marked by a cathode band on the body end of the SMA package. The banded end is the cathode; the opposite end is the anode. This matches standard diode marking convention and ensures correct orientation during placement on PCBs.
Does SMAZ12-13-F require moisture preconditioning before reflow?
No. SMAZ12-13-F has Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without baking or dry-pack requirements.
Can SMAZ12-13-F replace SMAZ12-13 without modification?
Yes. SMAZ12-13-F is the RoHS-compliant, lead-free version of SMAZ12-13. Both share identical electrical specifications, mechanical dimensions, and thermal characteristics; only the plating (matte tin vs. SnPb) differs, making them drop-in replacements in lead-free assembly processes.
SMAZ12-13-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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 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
SMAZ12-13-F FAQ
1.How can I place an order for SMAZ12-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAZ12-13-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 SMAZ12-13-F reliable?
The price and inventory of SMAZ12-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAZ12-13-F is usually 5 days.
3.What payment methods are accepted for SMAZ12-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAZ12-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAZ12-13-F?
SMAZ12-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAZ12-13-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 SMAZ12-13-F?
For technical support, including SMAZ12-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAZ12-13-F requirements.
6.How does Aetrix verify that SMAZ12-13-F is sourced from the original manufacturer or authorized distributors?
All SMAZ12-13-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 SMAZ12-13-F meets industry standards.
7.What is the process for return or replacement of SMAZ12-13-F?
All SMAZ12-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMAZ12-13-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 SMAZ12-13-F part is unused and in its original packaging.
Return procedure for SMAZ12-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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