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Diodes Incorporated DDZ9V1B-7
- Part No.:
- DDZ9V1B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ9V1B-7.pdf
- Description:
- DIODE ZENER 8.79V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
DDZ9V1B-7 from Diodes Incorporated is a surface-mount precision Zener diode designed for voltage regulation and reference applications in space-constrained PCBs. It delivers a nominal Zener voltage of 8.79 V (min 8.57 V, max 9.01 V) at 20 mA test current, with low dynamic impedance (8 Ω at 1 kHz), tight tolerance (±2.5%), and operates across –65°C to +150°C. It is commonly used in power supply feedback loops and analog sensor reference circuits.
For engineers reviewing the DDZ9V1B-7 datasheet, DDZ9V1B-7 pinout, DDZ9V1B-7 application, or DDZ9V1B-7 equivalent, this page provides verified package dimensions, thermal derating curves, reverse leakage behavior at 7.0 V, and direct alternatives with validated parameter differences for stable voltage reference design.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified Zener test current of 20 mA and maintains regulation down to 0.5 mA minimum knee current. Its 8 Ω Zener impedance at 1 kHz ensures minimal output voltage variation under dynamic load transients.
The device uses an SOD123 package with matte tin–annealed Alloy 42 leadframe, rated for 470 mW power dissipation at 25°C ambient and 266°C/W junction-to-ambient thermal resistance on standard FR-4 board layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.57 V to 9.01 V at IZT = 20 mA - defines stable regulation window for feedback sensing |
| Zener Impedance (ZZT) | 8 Ω at f = 1 kHz - ensures <10 mV output shift per 80 mA load step in reference circuits |
| Maximum Reverse Current (IR) | 0.5 µA at VR = 7.0 V - guarantees low quiescent error in high-impedance bias networks |
| Power Dissipation (PD) | 470 mW at TA = +25°C - supports continuous operation in compact DC-DC converter feedback paths |
| Thermal Resistance (RθJA) | 266 °C/W - requires ≥1 in² copper pad for full-rated power in industrial ambient conditions |
| Operating Temperature | –65°C to +150°C - enables use in automotive under-hood and industrial motor control environments |
| Package | SOD123 - 2.65 mm × 1.55 mm footprint compatible with automated pick-and-place and reflow |
Pinout & Package
SOD123 is a two-terminal surface-mount package with cathode indicated by a band on the body. Terminals are matte tin–annealed Alloy 42; solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; establishes reference return path |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable voltage relative to anode; used as feedback input to error amplifier |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±2.5% (8.57–9.01 V range) - reduces calibration overhead in factory-trimmed power supplies |
| Low Zener impedance | 8 Ω at 1 kHz - minimizes AC ripple coupling into voltage reference nodes |
| Automated assembly compatibility | SOD123 package with J-STD-020 Level 1 moisture sensitivity - eliminates bake requirements pre-reflow |
| Green and RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) - meets automotive and industrial environmental mandates |
| High-temperature operation | Rated to +150°C junction temperature - supports placement near power MOSFETs or in sealed enclosures |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference node for TL431-like shunt regulator configuration. Use Value: Tight 8.79 V ±2.5% tolerance enables ±1% output accuracy without secondary-side trimming. |
Use Scenario: Provides stable excitation voltage for RTD or bridge-based pressure sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference for ratiometric ADC biasing. Use Value: 0.5 µA reverse leakage at 7.0 V prevents loading errors in high-impedance Wheatstone bridges. |
| Automotive Body Control Module | Programmable Logic Controller Input Protection |
Use Scenario: Supplies regulated bias to LIN transceiver ICs and microcontroller reset supervisors. IC Role / Device Role / Timing Role: Voltage clamp and reference source in 12 V battery-supplied subsystems. Use Value: –65°C to +150°C operating range supports under-dash mounting without derating. |
Use Scenario: Clamps transient overvoltage on 24 V digital input channels before signal conditioning. IC Role / Device Role / Timing Role: Fast-response overvoltage protector for PLC field I/O protection stages. Use Value: 470 mW power rating absorbs 100 ns, 1 kV EFT bursts when paired with series current-limiting resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1,115 | Zener voltage 8.65–9.55 V (±5%), ZZT = 10 Ω, PD = 300 mW, SOT23 package | Higher voltage tolerance and lower power rating limit use in high-current reference paths | Select when board space allows SOT23 and ±5% regulation is acceptable for cost-sensitive consumer designs |
| MMSZ5240B-TP | Zener voltage 8.7–9.3 V (±5%), ZZT = 17 Ω, PD = 500 mW, SOD123 package | Looser tolerance and higher impedance reduce stability in precision feedback loops | Choose only for non-critical biasing where 500 mW dissipation is required and 17 Ω impedance is acceptable |
Compared with BZX84-C9V1,115 and MMSZ5240B-TP, DDZ9V1B-7 offers tighter voltage tolerance (±2.5% vs. ±5%), lower impedance (8 Ω vs. ≥10 Ω), and guaranteed SOD123 compatibility-making it preferred for industrial and automotive feedback regulation where long-term drift and thermal stability are critical.
Availability
DDZ9V1B-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive body control modules, and programmable logic controller input protection requiring stable component supply and AEC-Q101-aligned reliability.
Supply support for DDZ9V1B-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 regulation in cost-sensitive, high-volume applications-designed specifically for robust performance in automotive, industrial, and computing power systems where thermal stability and tight tolerance matter.
FAQ
What is the maximum steady-state power dissipation for DDZ9V1B-7 at 75°C ambient?
At 75°C ambient, DDZ9V1B-7 is rated for 500 mW power dissipation per the datasheet's Note 6. This assumes proper PCB thermal relief (e.g., 1 in² copper pad) and accounts for junction temperature limits up to +150°C. Derating begins linearly above 75°C using the 266°C/W RθJA value.
Does DDZ9V1B-7 have AEC-Q101 qualification?
No-DDZ9V1B-7 is the commercial-grade variant. The automotive-qualified version is DDZ9V1BQ-7, which carries AEC-Q101 qualification, PPAP capability, and is manufactured in IATF16949-certified facilities. The "Q" suffix denotes automotive compliance; the base part number does not include this qualification.
Can DDZ9V1B-7 replace a 9.1 V Zener in an existing design?
Yes-its 8.57–9.01 V range overlaps closely with standard 9.1 V Zeners (typically 8.65–9.55 V). However, verify that the 8 Ω ZZT and 0.5 µA IR at 7.0 V meet your circuit's regulation error and leakage budget, especially in high-precision feedback paths where tighter tolerance matters.
What is the cathode marking convention for SOD123-packaged DDZ9V1B-7?
The cathode is marked by a visible band on the body end of the SOD123 package. In top view, the band aligns with the cathode terminal; the unmarked end is the anode. This matches JEDEC-standard SOD123 polarity and ensures correct orientation during automated placement and functional testing.
DDZ9V1B-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):
- 8.79 V
- Tolerance:
- ±3%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 7 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
DDZ9V1B-7 FAQ
1.How can I place an order for DDZ9V1B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ9V1B-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 DDZ9V1B-7 reliable?
The price and inventory of DDZ9V1B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ9V1B-7 is usually 5 days.
3.What payment methods are accepted for DDZ9V1B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ9V1B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ9V1B-7?
DDZ9V1B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ9V1B-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 DDZ9V1B-7?
For technical support, including DDZ9V1B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ9V1B-7 requirements.
6.How does Aetrix verify that DDZ9V1B-7 is sourced from the original manufacturer or authorized distributors?
All DDZ9V1B-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 DDZ9V1B-7 meets industry standards.
7.What is the process for return or replacement of DDZ9V1B-7?
All DDZ9V1B-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ9V1B-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 DDZ9V1B-7 part is unused and in its original packaging.
Return procedure for DDZ9V1B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZ9V1B-7 Tags
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