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Diodes Incorporated UDZ6V8B-7
- Part No.:
- UDZ6V8B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
UDZ6V8B-7.pdf
- Description:
- DIODE ZENER 6.79V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
UDZ6V8B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 6.65–6.93 V, ±5% tolerance, 200 mW power dissipation, 40 Ω dynamic impedance at 5 mA, and SOD323 package. It provides stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection for microcontroller I/O pins.
For engineers reviewing the UDZ6V8B-7 datasheet, UDZ6V8B-7 pinout, UDZ6V8B-7 application, or UDZ6V8B-7 equivalent, key selection criteria include zener voltage tightness (±5%), low dynamic impedance (40 Ω @ 5 mA), thermal resistance (625 °C/W), RoHS/Green compliance, and SOD323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a precise, temperature-stable DC reference voltage. Its sharp knee characteristic and low ZZT (40 Ω) ensure minimal regulation error under varying load currents.
Designed for ambient temperatures from –65 °C to +150 °C, it features a cathode band marking, matte tin–annealed terminals, and J-STD-020D Level 1 moisture sensitivity - enabling reliable reflow soldering without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.65–6.93 V at 5 mA - defines regulated output voltage range for reference or clamping |
| Power Dissipation (PD) | 200 mW - maximum continuous power handling on FR-4 board with recommended pad layout |
| Zener Impedance (ZZT) | 40 Ω @ 5 mA - low AC impedance ensures stable regulation under small-signal load variations |
| Reverse Current (IR) | 0.5 µA @ 3.5 V - specifies leakage below breakdown, critical for low-power standby circuits |
| Thermal Resistance (RθJA) | 625 °C/W - determines junction temperature rise above ambient at given power dissipation |
| Operating Temperature | –65 to +150 °C - supports industrial and automotive under-hood applications |
Pinout & Package
Package: SOD323 - ultra-compact 2-pin surface-mount case (1.30 × 1.70 × 0.95 mm), UL 94V-0 rated, cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; forms reference ground return path |
| Cathode | Zener breakdown terminal / voltage regulation node | Connected to higher-potential side; delivers regulated voltage when reverse biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage regulation | ±5% VZ tolerance enables accurate 6.8 V reference without trimming |
| Low dynamic impedance | 40 Ω at 5 mA minimizes output voltage shift across load current changes |
| Automated assembly compatibility | SOD323 footprint and matte tin finish support high-yield reflow and wave soldering |
| Environmental compliance | Fully RoHS-compliant, halogen- and antimony-free "Green" construction per Diodes Inc. spec |
Applications
| Voltage Reference for ADC Biasing | Microcontroller I/O Clamp Protection |
|---|---|
Use Scenario: Providing stable 6.8 V reference to bias analog front-end circuitry before an 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision shunt reference establishing known DC offset and full-scale scaling point. Use Value: Tight 6.65–6.93 V tolerance and low 40 Ω ZZT reduce integral nonlinearity (INL) errors in measurement chain. | Use Scenario: Protecting 3.3 V GPIO pins of an ARM Cortex-M4 against transient overvoltage from ESD or inductive kickback. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to ≤3.5 V until transient energy dissipates. Use Value: Sub-µA leakage (0.5 µA @ 3.5 V) prevents signal loading; SOD323 size fits dense PCB layouts near connectors. |
| Low-Power LDO Feedback Divider | Industrial Sensor Excitation Supply |
Use Scenario: Setting output voltage of a 200 mA adjustable LDO via resistive divider where top resistor connects to regulated 6.8 V node. IC Role / Device Role / Timing Role: Stable voltage source replacing internal bandgap reference to improve output accuracy. Use Value: 200 mW rating allows direct connection without series resistor; ±5% VZ maintains <1% output error over temperature. | Use Scenario: Supplying excitation voltage to a 350 Ω strain gauge bridge in a factory-floor pressure transducer. IC Role / Device Role / Timing Role: Low-drift DC bias source delivering constant current through bridge legs. Use Value: –65 to +150 °C operating range ensures stability across uncontrolled industrial environments; low TC near zero improves long-term calibration hold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8 | Same 6.8 V nominal, but ±5% tolerance, 300 mW PD, SOT-23 package (larger footprint) | Higher power margin suits higher-current references; SOT-23 less suitable for ultra-dense layouts | Select if board space permits larger package and >200 mW headroom is needed |
| MMSZ4687 | 6.8 V nominal, ±5%, 500 mW PD, SOD-123 package (0.1 mm taller, same length/width) | Higher power rating allows use in 10 mA+ reference designs; slightly higher RθJA (~700 °C/W) | Choose when thermal derating above 150 °C ambient is required and SOD-123 is acceptable |
Compared with BZX84-C6V8 and MMSZ4687, UDZ6V8B-7 offers the smallest footprint (SOD323), lowest thermal resistance among sub-300 mW Zeners, and AEC-Q101 qualification - making it optimal for space-constrained, automotive-grade, or thermally sensitive reference designs.
Availability
UDZ6V8B-7 is available at Aetrix Electronics and suitable for voltage reference design, I/O protection, LDO feedback networks, and sensor excitation circuits requiring stable component supply and consistent parametric performance across production lots.
Supply support for UDZ6V8B-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 the Americas.
The UDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage regulation and clamping in space-constrained, high-reliability applications including automotive, industrial control, and portable electronics.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The UDZ6V8B-7 has a nominal zener voltage of 6.65–6.93 V at 5 mA test current. Its specified reverse breakdown occurs within that range under standard conditions. The absolute maximum reverse voltage before irreversible damage is not defined separately - operation must remain within the 200 mW power limit and –65 to +150 °C temperature range to avoid degradation.
Is this part qualified for automotive applications?
Yes. The UDZ6V8B-7 is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and other reliability requirements mandated for passive semiconductor components used in automotive electronic systems.
Does the SOD323 package support lead-free reflow soldering?
Yes. The device uses matte tin–annealed terminals over Alloy 42 leadframe and is fully RoHS compliant. It meets MIL-STD-202, Method 208 for solderability and is rated for J-STD-020D Level 1 moisture sensitivity - permitting standard Pb-free reflow profiles without baking.
How does temperature affect its zener voltage stability?
Per Figure 7 in the datasheet, UDZ6V8B-7 (within the UDZ6V2B–UDZ10B group) exhibits a typical temperature coefficient of approximately +0.04 %/°C near 6.8 V. This means VZ increases ~2.7 mV/°C over its operating range, enabling predictable drift compensation in precision circuits.
UDZ6V8B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.79 V
- Tolerance:
- ±2.06%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 3.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
UDZ6V8B-7 FAQ
1.How can I place an order for UDZ6V8B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for UDZ6V8B-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 UDZ6V8B-7 reliable?
The price and inventory of UDZ6V8B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDZ6V8B-7 is usually 5 days.
3.What payment methods are accepted for UDZ6V8B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDZ6V8B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDZ6V8B-7?
UDZ6V8B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDZ6V8B-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 UDZ6V8B-7?
For technical support, including UDZ6V8B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDZ6V8B-7 requirements.
6.How does Aetrix verify that UDZ6V8B-7 is sourced from the original manufacturer or authorized distributors?
All UDZ6V8B-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 UDZ6V8B-7 meets industry standards.
7.What is the process for return or replacement of UDZ6V8B-7?
All UDZ6V8B-7 units undergo pre-shipment inspection (PSI). If there is an issue with UDZ6V8B-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 UDZ6V8B-7 part is unused and in its original packaging.
Return procedure for UDZ6V8B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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