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Diodes Incorporated PD3Z284C12-7
- Part No.:
- PD3Z284C12-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- PowerDI™ 323
- Datasheet:
-
PD3Z284C12-7.pdf
- Description:
- DIODE ZENER 12V 500MW POWERDI323
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
PD3Z284C12-7 from Diodes Incorporated is a 12 V, 500 mW surface-mount Zener diode in PowerDI™323 package, with ±5% zener voltage tolerance (11.4–12.7 V @ 5 mA), 10 Ω dynamic impedance, and AEC-Q101 qualification for automotive-grade reliability. It provides precision voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the PD3Z284C12-7 datasheet, PD3Z284C12-7 pinout, PD3Z284C12-7 application, or PD3Z284C12-7 equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, thermal resistance (250 °C/W), reverse leakage (<0.1 µA @ 8.0 V), and compatibility with lead-free reflow profiles per J-STD-020D Level 1.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the ultra-small PowerDI323 package enables high-density PCB layouts in space-constrained applications.
The device exhibits a negative temperature coefficient of +6.0 mV/°C (typical) across its operating range, enabling predictable drift compensation in analog reference designs. It is rated for continuous operation from –65 °C to +150 °C and supports pulsed power dissipation up to 500 mW at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V range @ 5 mA - defines stable regulation point for feedback or reference networks |
| Power Dissipation (PD) | 500 mW - maximum steady-state power handling on standard polyimide PCB with recommended pad layout |
| Zener Impedance (ZZT) | 10 Ω @ 5 mA - low dynamic resistance ensures minimal output voltage variation under load changes |
| Reverse Leakage (IR) | <0.1 µA @ 8.0 V - guarantees negligible current draw in standby or high-impedance sensing nodes |
| Thermal Resistance (RθJA) | 250 °C/W - determines junction temperature rise above ambient under full power; requires thermal-aware layout |
| Temperature Coefficient | +6.0 mV/°C - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Package | PowerDI™323 - 2.5 × 1.9 mm footprint, 0.13 mm typical height, RoHS-compliant matte tin finish |
Pinout & Package
PowerDI™323 is a 2-terminal surface-mount package with cathode band marking. Terminals are anode (unmarked end) and cathode (banded end); polarity must be observed for proper reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; serves as return path during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply or voltage source; delivers stable 12 V reference when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use, including engine control modules and body electronics |
| Ultra-small PowerDI323 footprint | 2.5 × 1.9 mm outline enables placement in tight spaces without sacrificing thermal performance |
| Lead-free and RoHS compliant | Matte tin annealed over copper leadframe meets global environmental compliance requirements |
| Green molding compound | Halogen-free (no Br, Sb), UL 94V-0 rated - supports flame-retardant system design |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine coolant sensors. IC Role / Device Role / Timing Role: Zener reference diode supplying precise 12 V bias to sensor bridge circuitry. Use Value: Maintains <±1% output stability over –40 °C to +125 °C, ensuring accurate temperature measurement despite supply fluctuations. | Use Scenario: Generating fixed reference voltage for 12-bit ADC front-end in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision shunt reference establishing known voltage threshold for signal conditioning. Use Value: Low 10 Ω impedance minimizes code-to-code variation caused by reference loading, improving effective resolution. |
| Consumer Power Supply Feedback | Medical Instrumentation Calibration |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C chargers. IC Role / Device Role / Timing Role: Zener-based optocoupler feedback reference regulating output voltage via TL431-compatible loop. Use Value: Tight 5% tolerance and low leakage ensure ±3% output regulation without trimming, reducing BOM count. | Use Scenario: On-board calibration reference for portable ECG amplifier gain stages. IC Role / Device Role / Timing Role: Stable DC reference source for offset nulling and gain-setting resistors. Use Value: AEC-Q101 qualification correlates with long-term parametric stability required for medical device recalibration intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| D3Z12BF-7 | Same 12 V rating, 500 mW, but in SOD-323 package; lower RθJA (220 °C/W); tighter VZ tolerance (±2%) | Better thermal performance and tighter regulation, but different footprint and marking | Select if higher accuracy and improved thermal margin are prioritized over legacy footprint compatibility |
| BZX384-C12,115 | SOD-323 package, 500 mW, ±5% VZ, but not AEC-Q101 qualified; RθJA = 300 °C/W | Cost-optimized for commercial-grade applications; unsuitable for automotive environments | Choose only for non-automotive, cost-sensitive designs where AEC-Q101 is not mandated |
Compared with PD3Z284C12-7, D3Z12BF-7 offers superior accuracy and thermal efficiency but requires board redesign, while BZX384-C12,115 sacrifices automotive qualification and thermal performance for lower unit cost in consumer applications.
Availability
PD3Z284C12-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference, consumer power supply feedback, and medical instrumentation calibration requiring stable component supply and traceable sourcing.
Supply support for PD3Z284C12-7 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 PD3ZxxC series belongs to Diodes' automotive-qualified Zener diode portfolio, designed specifically for robust voltage reference and regulation in harsh-environment applications such as engine control units and ADAS subsystems.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The PD3Z284C12-7 has a nominal zener voltage of 12 V, with a guaranteed breakdown range of 11.4 V to 12.7 V at 5 mA test current. It is not rated for forward conduction beyond 1.1 V at 100 mA, and sustained reverse voltage below the breakdown threshold results in leakage currents under 0.1 µA at 8.0 V.
Is this part suitable for reflow soldering in lead-free processes?
Yes - PD3Z284C12-7 features matte tin annealed terminals and is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Its PowerDI323 package supports peak temperatures up to 260 °C, compatible with standard Pb-free SAC305 profiles.
Does this Zener diode require a series current-limiting resistor in all applications?
Yes - because it is a shunt regulator, PD3Z284C12-7 must always be used with a series resistor to limit current through the device. The resistor value is calculated based on input voltage, desired zener current (typically 5 mA), and power dissipation limits (500 mW max).
Why is this part marked "NOT RECOMMENDED FOR NEW DESIGNS"?
Diodes Incorporated recommends migrating to the newer D3ZxxBF series due to improved parametric consistency, tighter tolerances, and enhanced thermal performance. PD3Z284C12-7 remains fully functional and supported for existing designs and legacy production, but new designs should evaluate D3Z12BF-7 as the preferred replacement.
PD3Z284C12-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- PowerDI™ 323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 323
PD3Z284C12-7 FAQ
1.How can I place an order for PD3Z284C12-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for PD3Z284C12-7 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 PD3Z284C12-7 reliable?
The price and inventory of PD3Z284C12-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PD3Z284C12-7 is usually 5 days.
3.What payment methods are accepted for PD3Z284C12-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PD3Z284C12-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PD3Z284C12-7?
PD3Z284C12-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PD3Z284C12-7 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 PD3Z284C12-7?
For technical support, including PD3Z284C12-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PD3Z284C12-7 requirements.
6.How does Aetrix verify that PD3Z284C12-7 is sourced from the original manufacturer or authorized distributors?
All PD3Z284C12-7 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 PD3Z284C12-7 meets industry standards.
7.What is the process for return or replacement of PD3Z284C12-7?
All PD3Z284C12-7 units undergo pre-shipment inspection (PSI). If there is an issue with PD3Z284C12-7, 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 PD3Z284C12-7 part is unused and in its original packaging.
Return procedure for PD3Z284C12-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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