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Diodes Incorporated DFLZ7V5-7
- Part No.:
- DFLZ7V5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ7V5-7.pdf
- Description:
- DIODE ZENER 7.5V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:8,761
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Product details
Overview
DFLZ7V5-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, providing precise 7.5V nominal zener voltage (±0.5V tolerance) at 100mA test current, with low dynamic impedance (1Ω typ, 2Ω max), and operating across –55°C to +150°C for voltage regulation in automotive and industrial power rails.
For engineers reviewing the DFLZ7V5-7 datasheet, DFLZ7V5-7 pinout, DFLZ7V5-7 application, or DFLZ7V5-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (9°C/W junction-to-solder point), reverse leakage (<5µA at 5.3V), temperature coefficient (0 to +0.07%/°C), and AEC-Q qualified reliability for under-hood and high-temperature PCB designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 1W power dissipation rating is validated on FR-4 PCB with 1"x1" copper pad, and it achieves low thermal resistance (9°C/W) via direct cathode tab conduction to the PCB.
The device exhibits near-zero temperature coefficient (0 to +0.07%/°C) at 7.5V, minimizing drift over temperature, and features a robust 110°C/W junction-to-ambient thermal resistance when mounted per JEDEC-standard layout - critical for thermally constrained SMT applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5V nominal (7.0–7.9V range at IZT = 100mA); enables stable mid-range voltage clamping in 5–12V systems |
| Power Dissipation (PD) | 1.0W on FR-4 PCB; supports continuous regulation in compact power supply feedback paths without heatsinking |
| Zener Impedance (ZZT) | 1Ω typical / 2Ω maximum at 100mA; ensures minimal output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | <5µA at VR = 5.3V; guarantees low quiescent current in battery-backed or energy-sensitive circuits |
| Temp Coefficient (αVZ) | 0 to +0.07%/°C; delivers <±0.5% total drift over –40°C to +125°C ambient, suitable for precision references |
| Thermal Resistance (RθJS) | 9°C/W junction-to-solder point; allows accurate thermal modeling and safe derating up to 125°C board temperature |
| Operating Temp Range | –55°C to +150°C; certified for under-hood automotive, industrial motor drives, and outdoor power electronics |
Pinout & Package
Package: PowerDI123 - molded green plastic, UL 94V-0 rated, 0.01g weight, cathode band marking, matte tin annealed terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to system ground or lower-potential rail; forms reference return path during regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input rail; maintains fixed 7.5V drop relative to anode during breakdown operation |
Key Features
| Feature | Design Value |
|---|---|
| 1W Power Rating on Standard PCB | Validated on 1.5"×1.5" FR-4 with 2 oz Cu and 1"x1" pad - eliminates need for external heatsink in most SMT layouts |
| AEC-Q Qualified Reliability | Qualified to JEDEC standards for high-reliability automotive use; supports PPAP and functional safety-aware designs |
| Halogen & Antimony Free | Meets <900ppm Br, <900ppm Cl (<1500ppm Br+Cl), <1000ppm Sb - compliant with global environmental directives including RoHS 3 |
| Cathode Band Polarity Marking | Unambiguous visual identification on top surface - prevents reverse-mounting errors during automated assembly |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Regulating 7.5V reference for microcontroller ADC and sensor biasing in engine control units exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp protecting downstream analog circuitry from load dump transients. Use Value: Maintains ±0.5% reference stability over full automotive temperature range due to near-zero tempco and AEC-Q qualification. | Use Scenario: Providing stable 7.5V rail for isolated signal conditioning circuitry in programmable logic controller analog input stages. IC Role / Device Role / Timing Role: Low-drift Zener shunt regulator establishing clean reference for 16-bit DACs and instrumentation amplifiers. Use Value: 1Ω dynamic impedance minimizes noise coupling into sensitive analog front-ends during fast load steps. |
| Telecom Power Supply Feedback Loop | Medical Patient Monitor Power Sequencing |
Use Scenario: Secondary-side voltage sensing in isolated DC-DC converters for telecom base station power supplies requiring tight output regulation. IC Role / Device Role / Timing Role: Zener-based feedback element in optocoupler-coupled regulation loop, replacing TL431 where higher power margin is needed. Use Value: 1W rating enables robust operation during sustained overloads without thermal runaway, improving system fault tolerance. | Use Scenario: Generating controlled power-up sequencing voltages for FPGA and mixed-signal ASICs in portable medical devices. IC Role / Device Role / Timing Role: Passive voltage threshold detector enabling staged enable signals based on rail ramp rates. Use Value: Low 5µA leakage at 5.3V ensures negligible current draw during standby, extending battery life in portable diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5 | 300mW rating, SOT-23 package, 20Ω ZZT max, wider VZ tolerance (±5%) | Limited to low-power signal-level references; unsuitable for >100mA regulation or high-temp environments | Select only for space-constrained, low-current biasing where thermal margin is not critical |
| MMSZ5236B | 500mW rating, SOD-123 package, 15Ω ZZT max, ±5% VZ tolerance, no AEC-Q qualification | Not rated for automotive under-hood use; lacks thermal performance for sustained 1W dissipation | Prefer for cost-sensitive consumer electronics where reliability and thermal headroom are secondary |
Compared with BZX84-C7V5 and MMSZ5236B, DFLZ7V5-7 delivers 2–3× higher power handling, sub-2Ω impedance, tighter 7.5V tolerance, and AEC-Q qualification - making it the sole choice for thermally demanding, high-stability, and automotive-grade Zener regulation.
Availability
DFLZ7V5-7 is available at Aetrix Electronics and suitable for automotive ECU power management, industrial PLC analog modules, telecom DC-DC feedback loops, and medical patient monitor sequencing requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DFLZ7V5-7 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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US.
The DFLZ series belongs to Diodes' high-reliability power Zener portfolio, engineered specifically for automotive and industrial voltage regulation where thermal stability, low impedance, and AEC-Q compliance are mandatory.
FAQ
What is the maximum steady-state current DFLZ7V5-7 can regulate without exceeding its 1W rating?
At 7.5V nominal zener voltage, DFLZ7V5-7 supports up to 133mA continuous current (P = V × I → I = 1W / 7.5V) under ideal thermal conditions on a properly designed FR-4 PCB. Derating is required above +25°C ambient per the published power derating curve - e.g., ~700mW at +85°C ambient.
Does DFLZ7V5-7 have a specified forward voltage, and how is it used in circuit design?
Yes - forward voltage is 1.2V at 200mA, per datasheet. While primarily used in reverse breakdown, this VF value matters when the device may experience forward conduction during startup, fault conditions, or bidirectional transient suppression - ensuring predictable clamping behavior and avoiding unintended forward conduction in series configurations.
How does the PowerDI123 package improve thermal performance compared to SOD-123 or DO-214AC?
PowerDI123 provides a dedicated cathode tab that directly contacts the PCB copper pour, achieving RθJS = 9°C/W - significantly lower than SOD-123 (~150°C/W) or DO-214AC (~60°C/W). This enables reliable 1W operation without heatsinks and simplifies thermal layout in dense power sections.
Is there an automotive-qualified version of DFLZ7V5-7, and what distinguishes it?
Yes - the DFLZ7V5Q-7 is the AEC-Q101 qualified variant. It undergoes additional stress testing (HTGB, TCT, HTRB) and is manufactured in IATF 16949-certified facilities. The standard DFLZ7V5-7 meets JEDEC reliability standards but is not formally AEC-Q101 certified; both share identical electrical specs and package dimensions.
DFLZ7V5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 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
DFLZ7V5-7 FAQ
1.How can I place an order for DFLZ7V5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ7V5-7 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 DFLZ7V5-7 reliable?
The price and inventory of DFLZ7V5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ7V5-7 is usually 5 days.
3.What payment methods are accepted for DFLZ7V5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ7V5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ7V5-7?
DFLZ7V5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ7V5-7 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 DFLZ7V5-7?
For technical support, including DFLZ7V5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ7V5-7 requirements.
6.How does Aetrix verify that DFLZ7V5-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ7V5-7 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 DFLZ7V5-7 meets industry standards.
7.What is the process for return or replacement of DFLZ7V5-7?
All DFLZ7V5-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ7V5-7, 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 DFLZ7V5-7 part is unused and in its original packaging.
Return procedure for DFLZ7V5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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