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Diodes Incorporated DFLZ15Q-7
- Part No.:
- DFLZ15Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ15Q-7.pdf
- Description:
- DIODE ZENER 15V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
DFLZ15Q-7 from Diodes Incorporated is a 15 V, 1.0 W surface-mount Zener diode in PowerDI123 package, rated for 1 µA maximum reverse leakage at 11 V, with 10 Ω typical Zener impedance at 1 mA test current and ±0.05 to +0.10 %/°C temperature coefficient - used for precision voltage regulation in automotive power supply rails and industrial sensor biasing.
For engineers reviewing the DFLZ15Q-7 datasheet, DFLZ15Q-7 pinout, DFLZ15Q-7 application, or DFLZ15Q-7 equivalent, key selection criteria include Zener voltage tolerance (13.8–15.6 V), thermal resistance junction-to-solder point (9 °C/W), AEC-Q101 qualification, RoHS/halogen-free compliance, and PowerDI123 thermal pad layout compatibility.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. It delivers 15 V regulation with ±0.05 to +0.10 %/°C TC across –55°C to +150°C, enabling reliable operation in under-hood automotive environments.
Its PowerDI123 package features an exposed cathode pad optimized for thermal conduction to PCB copper, achieving 9 °C/W RθJS and supporting full 1.0 W dissipation on FR-4 with 1"×1" 2 oz. copper pad - critical for sustained surge immunity in 12 V/24 V DC systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, 13.8–15.6 V range at IZT = 1 mA - ensures tight regulation window for 12 V system references |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB - supports continuous operation in compact power management circuits without forced cooling |
| Zener Impedance (ZZT) | 10 Ω typical at IZT = 1 mA - minimizes output voltage variation under dynamic load transients |
| Reverse Leakage (IR) | ≤1 µA at VR = 11 V - guarantees low quiescent current in battery-backed monitoring circuits |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-solder point - enables efficient heat transfer to PCB ground plane for thermal stability |
| Temperature Coefficient (TC) | +0.05 to +0.10 %/°C - provides predictable, positive drift for compensation in multi-stage regulators |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including high-temp operating life and surge robustness |
Pinout & Package
Package: PowerDI123 - molded plastic case with exposed cathode thermal pad (UL 94V-0), moisture sensitivity level 1, 0.01 g weight. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference return path | Connected to lower-potential node (e.g., GND or negative rail) during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Exposed metal pad serves as primary thermal path and electrical connection to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Patented interlocking clip design | Enables 100 A surge capability per US Patent #7,095,113 - critical for load-dump transient suppression |
| Exposed thermal pad | Reduces RθJS to 9 °C/W - allows full 1 W dissipation without heatsink on standard FR-4 |
| AEC-Q101 qualification | Validated for automotive under-hood use including HTOL, temperature cycling, and ESD testing |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl (<1500 ppm total Br+Cl), <1000 ppm Sb - compliant with EU ELV and JGPSSI |
| Lead-free matte tin finish | Solderable per MIL-STD-202, Method 208 - compatible with lead-free reflow profiles up to 260°C peak |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Stabilizing 5 V or 3.3 V LDO feedback networks in engine control modules exposed to 12 V battery transients. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp for microcontroller power domain. Use Value: 15 V Zener clamps load-dump spikes while its low TC ensures stable reference across –40°C to +125°C ambient. | Use Scenario: Protecting 4–20 mA current loop receiver inputs from field-wiring induced surges. IC Role / Device Role / Timing Role: Reverse-biased shunt regulator absorbing transient energy before it reaches precision ADC front-end. Use Value: 1 µA leakage at 11 V prevents signal offset error; 10 Ω ZZT maintains regulation accuracy during fast transients. |
| Telecom Power Supply Monitoring | Medical Diagnostic Sensor Biasing |
Use Scenario: Providing stable bias voltage for optocoupler feedback in isolated 48 V telecom DC-DC converters. IC Role / Device Role / Timing Role: Primary voltage reference for secondary-side regulation and brownout detection circuitry. Use Value: AEC-Q101 qualification ensures long-term reliability in fanless telecom chassis; 1 W rating handles sustained overvoltage events. | Use Scenario: Biasing photodiode or thermistor signal conditioning stages in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference for analog front-end gain-setting networks. Use Value: +0.05 to +0.10 %/°C TC enables predictable compensation in body-temperature-critical measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15-7-F | 15 V, 300 mW SOT-23 package; RθJA = 350 °C/W; no AEC-Q101 qualification | Limited to low-power consumer electronics; unsuitable for automotive or industrial thermal cycling | Select when board space is constrained and power dissipation ≤300 mW |
| MMSZ5245B-7-F | 15 V, 500 mW SOD-123; ZZT = 16 Ω at 5 mA; TC = +0.07 %/°C; AEC-Q101 qualified | Lower power rating requires derating above 70°C ambient; smaller thermal pad limits surge handling | Select when cost-sensitive designs accept 500 mW limit and reduced surge margin |
Compared with BZX84-C15-7-F and MMSZ5245B-7-F, DFLZ15Q-7 uniquely combines 1 W power, 9 °C/W RθJS, AEC-Q101 qualification, and patented surge clip - making it the only choice for automotive-grade 15 V regulation where thermal and transient robustness are non-negotiable.
Availability
DFLZ15Q-7 is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC analog input protection, telecom power monitoring, and medical sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DFLZ15Q-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, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The DFLZ series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive power rail stabilization and industrial surge protection where thermal performance and transient immunity are critical.
FAQ
What is the maximum reverse voltage (VR) at which DFLZ15Q-7 guarantees ≤1 µA leakage?
DFLZ15Q-7 guarantees ≤1 µA reverse leakage current at VR = 11 V, per Electrical Characteristics Table (Note 8). This value is measured under short-duration pulse conditions to minimize self-heating effects and is specified at TA = +25°C.
Can DFLZ15Q-7 be used in place of a 1N4744A in a 15 V regulator?
No - DFLZ15Q-7 is a surface-mount PowerDI123 device rated for 1 W with 9 °C/W RθJS, while 1N4744A is a through-hole DO-41 part rated for 1 W but with ~500 °C/W RθJA. Direct substitution requires PCB redesign, thermal pad layout, and reflow process validation.
Does DFLZ15Q-7 have a defined forward voltage specification?
Yes - forward voltage is specified as VF = 1.2 V at IF = 200 mA, per Maximum Ratings table. This value reflects conduction behavior when used in forward-biased protection configurations, though its primary function is reverse-bias Zener regulation.
Is the cathode band polarity consistent across all DFLZxQ-7 variants?
Yes - all DFLZxQ-7 devices use identical PowerDI123 packaging with cathode identified by a single black band adjacent to the cathode terminal. Top-view marking includes product type code (e.g., FHZ for DFLZ15Q) and date code (e.g., YM), with cathode band always positioned at the same end.
DFLZ15Q-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):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 11 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
DFLZ15Q-7 FAQ
1.How can I place an order for DFLZ15Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ15Q-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 DFLZ15Q-7 reliable?
The price and inventory of DFLZ15Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ15Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ15Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ15Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ15Q-7?
DFLZ15Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ15Q-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 DFLZ15Q-7?
For technical support, including DFLZ15Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ15Q-7 requirements.
6.How does Aetrix verify that DFLZ15Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ15Q-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 DFLZ15Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ15Q-7?
All DFLZ15Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ15Q-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 DFLZ15Q-7 part is unused and in its original packaging.
Return procedure for DFLZ15Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLZ15Q-7 Tags
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