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Diodes Incorporated DDZ8V2B-7
- Part No.:
- DDZ8V2B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ8V2B-7.pdf
- Description:
- DIODE ZENER 8.2V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,630
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Product details
Overview
DDZ8V2B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 7.78–8.19 V at 20 mA, ±5% tolerance, 8 Ω dynamic impedance at test current, and 0.5 µA maximum reverse leakage at 6.5 V. It operates in SOD123 package, rated for 470 mW power dissipation at 25°C ambient, and serves as voltage reference or overvoltage clamp in low-power analog circuits.
For engineers reviewing the DDZ8V2B-7 datasheet, DDZ8V2B-7 pinout, DDZ8V2B-7 application, or DDZ8V2B-7 equivalent, key selection criteria include zener voltage tightness (±2.6% typical), low thermal resistance (266°C/W on standard FR-4), automotive-grade availability (Q-variant), RoHS/Green compliance, and SOD123 footprint compatibility with automated assembly.
Technical Context
This device functions as a two-terminal voltage reference diode operating in reverse breakdown mode. Its zener voltage exhibits a positive temperature coefficient near 0.05%/°C in the 8 V range, enabling stable regulation across –65°C to +150°C junction temperature. The SOD123 package supports high-density PCB layouts with minimal parasitic capacitance (≈15 pF at 1 MHz).
It delivers precise regulation under low-current conditions (IZT = 20 mA) with low dynamic impedance (ZZT = 8 Ω), ensuring minimal output voltage variation under load transients. Reverse leakage remains tightly controlled (IR ≤ 0.5 µA at VR = 6.5 V), critical for battery-powered sensing and reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.78–8.19 V at IZT = 20 mA - defines stable reference point for analog feedback or clamping |
| Zener Impedance (ZZT) | 8 Ω at f = 1 kHz - ensures <0.16 V output shift per 20 mA load change |
| Power Dissipation (PD) | 470 mW at TA = +25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 6.5 V - preserves accuracy in high-impedance bias networks and battery monitoring |
| Thermal Resistance (RθJA) | 266°C/W on 25 mm × 25 mm FR-4 board - enables predictable derating up to +75°C ambient |
| Operating Temperature | –65°C to +150°C - suitable for industrial and automotive under-hood environments |
| Package | SOD123 - industry-standard 2-pin surface-mount outline compatible with pick-and-place and reflow |
Pinout & Package
SOD123 is a two-terminal surface-mount plastic package with cathode band marking. Terminals are matte tin annealed over Alloy 42 leadframe, solderable per MIL-STD-202 Method 208. Moisture sensitivity level is J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common; establishes reference potential when cathode is biased positively |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to regulated voltage rail; maintains stable VZ above anode when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Tight zener voltage tolerance | ±2.6% typical (7.78–8.19 V range) - reduces calibration overhead in precision references |
| Low dynamic impedance | 8 Ω at 20 mA - minimizes regulation error during signal-dependent current draw |
| Automotive qualification option | DDZ8V2BQ-7 variant AEC-Q101 qualified - supports functional safety-critical voltage monitoring |
| Green and RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) - meets global environmental mandates |
| High-reliability leadframe | Alloy 42 with matte tin anneal - ensures robust solder joint integrity and long-term intermetallic stability |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Precision voltage reference for 16-bit ADC biasing in temperature and pressure transmitters. IC Role / Device Role / Timing Role: Zener diode provides stable 8.2 V reference for op-amp gain-setting and ADC reference buffer. Use Value: Tight VZ tolerance and low ZZT maintain <0.02% full-scale error across –40°C to +85°C operating range. |
Use Scenario: Overvoltage protection clamp on USB-C CC line during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting shunt device limiting CC line voltage to 6.5 V during transient surges. Use Value: Low IR (≤0.5 µA) avoids false detection; SOD123 footprint fits space-constrained Type-C connector modules. |
| Automotive Cabin Controller Reference | IoT Node Battery Monitor |
|
Use Scenario: Stable reference for microcontroller internal ADC measuring 12 V battery rail. IC Role / Device Role / Timing Role: Zener supplies regulated 8.2 V to external voltage divider scaling battery voltage for MCU input. Use Value: AEC-Q101-qualified variant ensures reliability over 15-year vehicle lifetime and wide thermal cycling. |
Use Scenario: Low-quiescent monitoring of Li-ion cell voltage in wireless sensor nodes. IC Role / Device Role / Timing Role: Provides known reference for comparator-based low-battery detection threshold. Use Value: Sub-microamp IR prevents measurable drain on coin-cell batteries during multi-year standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2LT1G | Zener voltage 8.2 V ±5%, higher ZZT (15 Ω), SOT-23 package | Larger footprint and higher thermal resistance (350°C/W) limit power handling in dense layouts | Choose if SOT-23 is already standardized in design; avoid for >100 mW continuous dissipation |
| MMSZ5236BT1G | Zener voltage 8.2 V ±5%, higher IR (1.0 µA at 6.5 V), SOD-123 same footprint | Doubled reverse leakage reduces accuracy in high-Z bias networks and battery monitors | Acceptable for non-critical clamping; not recommended for precision reference or ultra-low-power systems |
Compared with BZX84-C8V2LT1G and MMSZ5236BT1G, DDZ8V2B-7 offers superior regulation stability (8 Ω vs. ≥15 Ω impedance) and lower leakage (0.5 µA), making it preferred for precision analog and long-life battery applications where SOD123 footprint is acceptable.
Availability
DDZ8V2B-7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C interface protection, automotive cabin controllers, and IoT battery monitoring requiring stable component supply and consistent parametric performance across production lots.
Supply support for DDZ8V2B-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 DDZ series targets precision voltage reference and clamping applications in space-constrained, high-reliability systems-designed specifically for automated SMT assembly and extended temperature operation in industrial and automotive environments.
FAQ
What is the maximum continuous power dissipation for DDZ8V2B-7 at 75°C ambient?
At TL = +75°C, DDZ8V2B-7 is rated for 500 mW continuous power dissipation per the datasheet's Note 6. This assumes proper thermal coupling to a defined heatsink or PCB copper area; on standard FR-4 with 1 in² pad, derating begins at 25°C ambient per the power curve in Figure 1.
Does DDZ8V2B-7 have automotive-grade qualification?
No-DDZ8V2B-7 is the commercial-grade variant. The automotive-qualified version is DDZ8V2BQ-7, which is AEC-Q101 certified, PPAP capable, and manufactured in IATF16949-certified facilities. Only the Q-suffix part meets automotive reliability and change-control requirements.
How does the temperature coefficient affect regulation accuracy over –40°C to +125°C?
Per Figure 16, DDZ8V2B exhibits a positive TC of ≈+0.05%/°C near 8 V. Over a 165°C range, this yields ≈±0.08% VZ drift relative to 25°C value-translating to ±6.6 mV shift for 8.2 V nominal, well within its ±2.6% initial tolerance band.
Can DDZ8V2B-7 replace a 1N4736A in existing designs?
No-1N4736A is a through-hole 8.2 V, 1 W Zener in DO-41 package. DDZ8V2B-7 is SMD, lower power (470 mW), and tighter tolerance but incompatible mechanically and thermally. Direct replacement requires PCB redesign, thermal analysis, and validation of regulation stability under new layout conditions.
DDZ8V2B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±2.5%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ8V2B-7 FAQ
1.How can I place an order for DDZ8V2B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ8V2B-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 DDZ8V2B-7 reliable?
The price and inventory of DDZ8V2B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ8V2B-7 is usually 5 days.
3.What payment methods are accepted for DDZ8V2B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ8V2B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ8V2B-7?
DDZ8V2B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ8V2B-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 DDZ8V2B-7?
For technical support, including DDZ8V2B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ8V2B-7 requirements.
6.How does Aetrix verify that DDZ8V2B-7 is sourced from the original manufacturer or authorized distributors?
All DDZ8V2B-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 DDZ8V2B-7 meets industry standards.
7.What is the process for return or replacement of DDZ8V2B-7?
All DDZ8V2B-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ8V2B-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 DDZ8V2B-7 part is unused and in its original packaging.
Return procedure for DDZ8V2B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ8V2B-7 Tags
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