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Diodes Incorporated DFLZ9V1Q-7
- Part No.:
- DFLZ9V1Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ9V1Q-7.pdf
- Description:
- DIODE ZENER 9.1V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:2,719
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Product details
Overview
DFLZ9V1Q-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, with nominal Zener voltage 9.1V (±5.5%), Zener impedance 1Ω at 50mA, maximum reverse current 5µA at 7.3V, and thermal resistance junction-to-soldering point of 9°C/W. It serves as precision voltage reference and overvoltage clamp in automotive power rails and industrial DC-DC feedback loops.
For engineers reviewing the DFLZ9V1Q-7 datasheet, DFLZ9V1Q-7 pinout, DFLZ9V1Q-7 application, or DFLZ9V1Q-7 equivalent, key selection criteria include Zener voltage tolerance, surge robustness via patented interlocking clip design, AEC-Q101 qualification for automotive use, thermal performance on FR-4 PCB, and RoHS/halogen-free compliance.
Technical Context
This Zener diode operates in reverse breakdown mode to regulate voltage with tight 9.1V nominal output across 8.5–9.6V range at test current IZT = 50mA. Its low 1Ω dynamic impedance ensures stable regulation under load transients, while the exposed cathode pad and thermally optimized PowerDI123 package enable 1.0W dissipation with RθJS = 9°C/W.
Designed for high-reliability automotive applications, it meets AEC-Q101 stress testing requirements including temperature cycling, HTRB, and surge current per US Patent #7,095,113. The device exhibits a positive temperature coefficient of +0.03%/°C to +0.08%/°C, minimizing drift over -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1V nominal, 8.5–9.6V range at IZT = 50mA - defines regulated output level in feedback or clamp circuits |
| Zener Impedance (ZZT) | 1Ω typical at 50mA - ensures minimal output voltage deviation during current fluctuations |
| Power Dissipation (PD) | 1.0W on FR-4 PCB - supports sustained operation in compact power management designs |
| Thermal Resistance (RθJS) | 9°C/W junction-to-soldering point - enables efficient heat transfer to PCB copper pour |
| Reverse Leakage (IR) | 5µA max at VR = 7.3V - guarantees low quiescent current in standby or sensing paths |
| Temperature Coefficient | +0.03 to +0.08%/°C - provides predictable, low-drift regulation across wide ambient range |
| Surge Capability | Patented interlocking clip design (US #7,095,113) - withstands repetitive transient surges without degradation |
Pinout & Package
Package: PowerDI123 - molded plastic case with large exposed cathode pad for thermal and mechanical robustness; UL 94V-0 rated; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation; forms return path for clamping current |
| Cathode | Zener breakdown terminal / heat sink interface | Exposed metal pad soldered directly to PCB copper; primary thermal conduction path and voltage reference point |
| Cathode Band | Polarity identification marker | Visible band on top surface indicating cathode; critical for correct orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power systems requiring extended temperature cycling and humidity exposure |
| 1.0W power rating on standard FR-4 | Eliminates need for external heatsinks in space-constrained engine control or body electronics modules |
| Lead-free, halogen- and antimony-free "Green" construction | Meets EU RoHS 2015/863/EU and automotive environmental compliance mandates |
| Low RθJS = 9°C/W | Enables reliable operation up to +150°C junction temperature with minimal PCB copper area |
| Patented surge-resistant clip design | Provides repeatable 100+ surge cycles without parameter shift-critical for load-dump protection |
Applications
| Automotive Load-Dump Protection | Industrial DC-DC Feedback Reference |
|---|---|
Use Scenario: Protects downstream ECUs during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Zener clamps transient voltage spikes to ≤12.5V, diverting surge current to ground via cathode pad. Use Value: Withstands 100+ 120V/10ms surges due to patented interlocking clip; eliminates need for TVS arrays in cost-sensitive modules. | Use Scenario: Sets precise output voltage in isolated flyback or buck-boost converters for PLC I/O modules. IC Role / Device Role / Timing Role: Provides stable 9.1V reference for optocoupler feedback loop, replacing higher-cost shunt regulators. Use Value: ±5.5% VZ tolerance and 1Ω ZZT ensure <±1% output regulation across line/load/temperature. |
| On-Board Charger Voltage Clamp | Motor Drive Gate Bias Stabilization |
Use Scenario: Limits gate driver supply rail during regenerative braking in EV on-board chargers. IC Role / Device Role / Timing Role: Clamps 12V auxiliary rail to prevent overvoltage damage to isolated gate drivers and MCU peripherals. Use Value: Low 9°C/W RθJS sustains 1W dissipation during repeated 500ms transients without derating. | Use Scenario: Stabilizes high-side gate bias voltage in 3-phase inverter half-bridges for HVAC compressors. IC Role / Device Role / Timing Role: Zener maintains fixed 9.1V bias for bootstrap capacitor recharge, ensuring consistent MOSFET turn-on threshold. Use Value: +0.03%/°C tempco minimizes gate drive variation across -40°C to +125°C motor compartment temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1LT1G | 0.3W rating, SOT-23 package, RθJA = 300°C/W, no AEC-Q101 qualification | Suitable only for low-power signal-level clamping; insufficient for automotive load-dump energy absorption | Select when board space is critical and surge immunity is not required |
| SMBJ9.0A | TVS diode, 600W peak pulse power, bidirectional, 10.0V breakdown, higher leakage (50µA) | Designed for ESD/surge suppression-not precision regulation; lacks stable DC Zener characteristics | Select only for transient-only protection where DC regulation is handled separately |
Compared with BZX84-C9V1LT1G and SMBJ9.0A, DFLZ9V1Q-7 uniquely combines AEC-Q101 reliability, 1W continuous dissipation, low ZZT, and thermal efficiency-making it the only viable choice for automotive-grade DC voltage regulation under sustained stress.
Availability
DFLZ9V1Q-7 is available at Aetrix Electronics and suitable for automotive power management, industrial DC-DC converter feedback, on-board charger clamping, and motor drive bias stabilization requiring stable component supply across multi-year production cycles.
Supply support for DFLZ9V1Q-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 centers across Asia and manufacturing in China, Taiwan, and the Philippines.
The DFLZ series belongs to Diodes' AEC-Q101-qualified power Zener portfolio, engineered specifically for automotive and industrial voltage regulation where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the maximum continuous power dissipation for DFLZ9V1Q-7 on a standard PCB?
DFLZ9V1Q-7 delivers 1.0W continuous power dissipation when mounted on a 1.5" × 1.5" FR-4 PCB with 2 oz. copper and a 1" × 1" thermal pad layout. Derating begins above +25°C ambient per Figure 1, reaching zero dissipation at +150°C ambient.
Does DFLZ9V1Q-7 support automotive PPAP documentation?
Yes-DFLZ9V1Q-7 is PPAP capable per Diodes Incorporated's automotive quality system. Full PPAP Level 3 documentation-including dimensional reports, material certifications, process flow diagrams, and control plans-is available upon request for qualified OEM programs.
How does the PowerDI123 package improve thermal performance versus SOD-123?
The PowerDI123 package features an enlarged exposed cathode pad that reduces RθJS to 9°C/W-over 3× better than typical SOD-123 Zeners (~30°C/W). This allows higher power handling without added copper area or thermal vias, verified per JEDEC JESD51-2A test conditions.
Can DFLZ9V1Q-7 replace DFLZ9V1Q in existing designs?
Yes-DFLZ9V1Q-7 is the tape-and-reel packaging variant of DFLZ9V1Q (bulk), sharing identical electrical, thermal, and mechanical specifications. The "-7" suffix denotes 3000-piece reel packaging per AEC-Q101 ordering conventions; no design changes are needed for migration.
DFLZ9V1Q-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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLZ9V1Q-7 FAQ
1.How can I place an order for DFLZ9V1Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ9V1Q-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 DFLZ9V1Q-7 reliable?
The price and inventory of DFLZ9V1Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ9V1Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ9V1Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ9V1Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ9V1Q-7?
DFLZ9V1Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ9V1Q-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 DFLZ9V1Q-7?
For technical support, including DFLZ9V1Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ9V1Q-7 requirements.
6.How does Aetrix verify that DFLZ9V1Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ9V1Q-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 DFLZ9V1Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ9V1Q-7?
All DFLZ9V1Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ9V1Q-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 DFLZ9V1Q-7 part is unused and in its original packaging.
Return procedure for DFLZ9V1Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLZ9V1Q-7 Tags
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