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Diodes Incorporated DFLZ8V2-7
- Part No.:
- DFLZ8V2-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ8V2-7.pdf
- Description:
- DIODE ZENER 8.2V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:5,615
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Product details
Overview
DFLZ8V2-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, rated for 8.2V nominal zener voltage at 100mA test current, with 1Ω typical zener impedance and ±0.03 to +0.08%/°C temperature coefficient. It delivers stable voltage regulation in automotive and industrial power supply rails, ESD protection clamping networks, and overvoltage reference circuits.
For engineers reviewing the DFLZ8V2-7 datasheet, DFLZ8V2-7 pinout, DFLZ8V2-7 application, or DFLZ8V2-7 equivalent, key selection criteria include its 1W FR-4 PCB power dissipation, cathode-band polarity marking, JEDEC-qualified reliability, RoHS-compliant matte tin finish, and thermal resistance of 9°C/W junction-to-soldering-point.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain precise DC voltage under varying load and temperature conditions. Its low 1Ω typical zener impedance ensures minimal voltage deviation across 10–100mA operating current range, while the +0.03 to +0.08%/°C positive temperature coefficient enables predictable drift compensation in multi-device bias networks.
Designed for high-reliability mounting on standard FR-4 PCBs, it achieves 1.0W power dissipation with a thermal resistance of 110°C/W junction-to-ambient (1.5" × 1.5" pad) and only 9°C/W junction-to-soldering-point - critical for thermally constrained layouts in automotive body control modules and industrial PLC I/O stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal at 100 mA test current; maintains regulation within 7.7–8.7 V tolerance band |
| Zener Impedance (ZZT) | 1 Ω typical at 100 mA; ensures <10 mV output variation per 10 mA load change |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB with 1"×1" copper pad; supports sustained clamp duty in transient suppression |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-soldering-point; enables direct thermal coupling to PCB ground plane |
| Reverse Leakage (IR) | <5 µA at 6.56 V (80% VZ); guarantees low standby current in precision reference paths |
| Temperature Coefficient | +0.03 to +0.08 %/°C; allows predictable series-Zener temperature compensation designs |
| Forward Voltage (VF) | 1.2 V at 200 mA; supports bidirectional clamping when paired with another diode |
Pinout & Package
Package: PowerDI123 - molded green plastic, UL 94V-0 rated, 0.01 g weight, cathode indicated by band on top surface. Terminals are matte tin annealed over copper leadframe, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in clamp circuit | Electrically tied to exposed cathode tab via internal die structure; not isolated |
| Cathode | Current exit terminal in reverse breakdown; connected to regulated or clamped node | Exposed metal tab on bottom surface; primary thermal path to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| 1W Power Dissipation on FR-4 | Enables robust transient voltage suppression without heatsink in space-constrained PCBs |
| JEDEC High-Reliability Qualification | Validated per AEC-Q stress tests; suitable for automotive body electronics and industrial control |
| RoHS & Halogen-Free "Green" Construction | Meets EU RoHS 3 (2015/863/EU), <900 ppm Br/Cl, <1000 ppm Sb; compliant for global OEM shipments |
| Cathode Band Polarity Marking | Unambiguous visual identification on top surface; prevents assembly orientation errors |
| Low RθJS = 9°C/W | Direct thermal conduction from die to solder joint improves long-term stability under pulsed loads |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping 12V battery rail transients during load dump or jump-start events. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting MCU power supply and CAN transceiver VCC. Use Value: Withstands 1W pulses up to 100ms; 8.2V regulation holds downstream ICs within safe operating voltage. |
Use Scenario: Protecting 4–20mA current loop receiver inputs from field-wiring surges. IC Role / Device Role / Timing Role: Reverse-biased shunt regulator placed across input terminals before signal conditioning op-amp. Use Value: 1Ω ZZT ensures ≤10mV error shift during 20mA full-scale operation; low leakage preserves loop accuracy. |
| Medical Sensor Reference Voltage | Consumer Power Adapter Feedback Network |
Use Scenario: Providing stable 8.2V reference for ADC biasing in portable ECG front-end. IC Role / Device Role / Timing Role: Precision voltage reference source in ratiometric sensor excitation chain. Use Value: +0.03 to +0.08%/°C TC enables predictable two-Zener compensation; 5µA max IR minimizes reference current error. |
Use Scenario: Secondary-side voltage sensing in flyback converter feedback divider. IC Role / Device Role / Timing Role: Zener element in optocoupler-coupled feedback network regulating 5V/12V outputs. Use Value: 1W rating accommodates startup overshoot; tight 7.7–8.7V VZ tolerance reduces output regulation error to ±1.2%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2 (Diodes Inc.) | 0.3W SOT-23 package; 15Ω ZZT; ±5% VZ tolerance | Lower power, higher impedance - suited for signal-level biasing, not power rail clamping | Select when board space is critical and power dissipation <300mW; avoid for 12V system transients |
| MMSZ4687 (ON Semiconductor) | 0.5W SOD-123; 10Ω ZZT; 8.2V ±5%; no AEC-Q qualification | Lacks automotive qualification and 1W capability - limited to commercial-grade consumer power supplies | Acceptable for cost-sensitive non-automotive designs where thermal margin is adequate |
Compared with BZX84-C8V2 and MMSZ4687, DFLZ8V2-7 provides 3.3× and 2× higher power handling, 15× and 10× lower zener impedance, and formal AEC-Q qualification - making it the sole choice for thermally demanding, safety-critical 12V rail regulation.
Availability
DFLZ8V2-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input stages, and medical sensor reference circuits requiring stable component supply and long-term lifecycle support.
Supply support for DFLZ8V2-7 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 DFLZ series belongs to Diodes' Power Discrete portfolio, engineered specifically for high-reliability voltage regulation and transient suppression in automotive and industrial environments where thermal robustness and JEDEC qualification are mandatory.
FAQ
What is the maximum continuous reverse current the DFLZ8V2-7 can handle at 8.2V?
The DFLZ8V2-7 is specified for 100 mA zener test current (IZT) and supports continuous reverse current up to 125 mA at 25°C ambient, derating linearly to zero at 150°C junction temperature per the 1.0W power limit and 110°C/W RθJA. At 8.2V, this corresponds to 102.5 mW at 12.5 mA - well within safe operating area.
Can DFLZ8V2-7 be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficients below ~5V and positive above, but DFLZ8V2-7's +0.03 to +0.08%/°C TC still causes current hogging if paralleled without ballast resistors. Its 1Ω ZZT also means mismatched units will share current unevenly; use a single device sized for the full load.
Is there an automotive-qualified version of DFLZ8V2-7?
Yes - the DFLZ8V2Q-7 is the AEC-Q200 qualified variant, manufactured under the same process and tested to extended temperature cycling, humidity, and vibration requirements. It shares identical electrical specs and PowerDI123 packaging but carries separate part numbering and qualification documentation.
How does the PowerDI123 package compare thermally to SMA or DO-214AC?
PowerDI123 offers 9°C/W RθJS, significantly better than SMA's ~20°C/W and DO-214AC's ~15°C/W due to its exposed cathode tab acting as a direct thermal interface to PCB copper. This enables 1W operation without external heatsinking - a key advantage in dense automotive PCB layouts.
DFLZ8V2-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLZ8V2-7 FAQ
1.How can I place an order for DFLZ8V2-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ8V2-7 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 DFLZ8V2-7 reliable?
The price and inventory of DFLZ8V2-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ8V2-7 is usually 5 days.
3.What payment methods are accepted for DFLZ8V2-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ8V2-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ8V2-7?
DFLZ8V2-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ8V2-7 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 DFLZ8V2-7?
For technical support, including DFLZ8V2-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ8V2-7 requirements.
6.How does Aetrix verify that DFLZ8V2-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ8V2-7 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 DFLZ8V2-7 meets industry standards.
7.What is the process for return or replacement of DFLZ8V2-7?
All DFLZ8V2-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ8V2-7, 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 DFLZ8V2-7 part is unused and in its original packaging.
Return procedure for DFLZ8V2-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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