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Diodes Incorporated DFLZ11-7
- Part No.:
- DFLZ11-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ11-7.pdf
- Description:
- DIODE ZENER 11V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:6,255
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Product details
Overview
DFLZ11-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, providing precise 11V nominal zener voltage (10.4–11.6V range) at 50mA test current, with 7Ω typical zener impedance and ±0.05%/°C to +0.10%/°C temperature coefficient - used for voltage regulation and overvoltage protection in DC power rails of industrial control modules.
For engineers reviewing the DFLZ11-7 datasheet, DFLZ11-7 pinout, DFLZ11-7 application, or DFLZ11-7 equivalent, key selection criteria include its 1W FR-4 PCB power dissipation rating, cathode-band polarity marking, JEDEC-qualified reliability, automotive-grade variant availability (DFLZ11Q), and thermal resistance of 9°C/W junction-to-soldering-point.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 1W power rating is validated on 1.5"×1.5" FR-4 PCB with 2 oz. copper and 1"×1" pad layout, and it exhibits low thermal resistance (RθJS = 9°C/W) for efficient heat transfer to the PCB cathode tab.
The device features a matte tin-annealed copper leadframe, UL 94V-0 molded plastic package, and meets J-STD-020 moisture sensitivity Level 1. It is RoHS-compliant, halogen- and antimony-free ("Green"), and qualified to AEC-Q standards for high-reliability applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal, 10.4–11.6 V range at IZT = 50 mA - ensures tight regulation tolerance in feedback loops |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB - supports robust operation in space-constrained industrial power supplies |
| Zener Impedance (ZZT) | 7 Ω typical at IZT = 50 mA - minimizes output voltage variation under dynamic load changes |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-soldering-point - enables direct thermal coupling to PCB ground plane for stability |
| Reverse Current (IR) | 4 µA max at VR = 8.2 V - ensures low leakage in standby-mode voltage references |
| Temperature Coefficient | +0.05 to +0.10 %/°C - provides predictable, positive drift for compensation-aware designs |
| Forward Voltage (VF) | 1.2 V at IF = 200 mA - defines conduction threshold when used bidirectionally or in clamp configurations |
Pinout & Package
Package: PowerDI123 - surface-mount, single-ended, cathode-band marked case with exposed cathode tab for thermal and electrical connection. Dimensions: 3.70 mm × 1.78 mm × 1.00 mm (E × D × A), weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to PCB trace or ground plane | Low-inductance path for forward conduction; not electrically isolated from package body |
| Cathode (Band-marked) | Current exit terminal in reverse breakdown; tied to regulated node | Exposed metal tab serves as primary thermal sink and low-impedance return path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| 1W power handling on standard FR-4 | Enables use in cost-sensitive industrial PCBs without heatsinks or thermal vias |
| Cathode-tab thermal path (RθJS = 9°C/W) | Reduces junction temperature rise by >30% vs. conventional SOD-123 packages under same load |
| AEC-Q qualified reliability | Validated for extended life in automotive subsystems (e.g., body control modules) per JEDEC stress protocols |
| Halogen- and antimony-free "Green" compound | Meets IPC-1752A material declaration requirements for RoHS 3 and ELV compliance |
| Lead-free, matte tin annealed terminations | Ensures consistent solder wetting and intermetallic formation across reflow profiles (J-STD-020 Level 1) |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module (BCM) Reference |
|---|---|
|
Use Scenario: Stabilizing 12V rail feedback in isolated flyback converters for PLC I/O modules. IC Role / Device Role: Precision shunt reference for TL431-based optocoupler feedback network. Use Value: 7Ω zener impedance maintains <±1.5% output regulation across –40°C to +105°C ambient. |
Use Scenario: Providing stable 11V reference for microcontroller ADC and CAN transceiver bias in BCMs. IC Role / Device Role: Voltage clamp and reference source for analog sensor interface circuitry. Use Value: AEC-Q qualification and ±0.10%/°C TC ensure long-term accuracy in engine bay environments. |
| LED Driver Overvoltage Protection | Programmable Logic Controller (PLC) Input Protection |
|
Use Scenario: Clamping transient spikes on constant-current LED driver outputs during hot-swap events. IC Role / Device Role: Fast-response shunt protector placed across LED string terminals. Use Value: 1W surge capability absorbs 100ns/1kV transients without degradation, per IEC 61000-4-4 Level 3. |
Use Scenario: Protecting 24V digital input channels from field-wiring surges and ESD in modular PLC backplanes. IC Role / Device Role: Primary clamping element in multi-stage TVS + Zener protection network. Use Value: Cathode-tab thermal mass sustains repeated 10A/8/20µs surge pulses without bond wire failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C11 (ON Semiconductor) | 350 mW SOT-23 package; 15 Ω ZZT; RθJA = 300°C/W | Limited to low-power signal-level references; unsuitable for >100 mA load regulation | Select when board space is critical and power < 0.35W; avoid for power rail stabilization |
| MMSZ5240B (Vishay) | 500 mW SOD-123; 20 Ω ZZT; no AEC-Q qualification; RθJS = 15°C/W | Lower thermal performance and reliability grade; not rated for automotive under-hood use | Acceptable for commercial-grade consumer power adapters where cost dominates thermal margin |
Compared with BZX84-C11 and MMSZ5240B, DFLZ11-7 delivers 2.8× higher power density, 65% lower zener impedance, and certified automotive reliability - making it the only choice for thermally constrained, high-stability 11V regulation in industrial and automotive systems.
Availability
DFLZ11-7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive body control modules, LED driver overvoltage protection, and programmable logic controller input protection requiring stable component supply and long-lifecycle support.
Supply support for DFLZ11-7 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 DFLZ series belongs to Diodes' Power Discrete portfolio, engineered specifically for high-reliability voltage regulation and transient suppression in harsh-environment applications - emphasizing thermal efficiency, JEDEC qualification, and green material compliance.
FAQ
What is the maximum continuous reverse current the DFLZ11-7 can sustain at 85°C ambient?
At TA = 85°C, derated power is 0.64W (per Figure 1). With VZ ≈ 11V, maximum sustainable reverse current is ~58 mA. Exceeding this risks thermal runaway due to positive TC above 6V; design must include adequate PCB copper area and airflow.
Can DFLZ11-7 be used in place of DFLZ11Q in non-automotive applications?
Yes - DFLZ11-7 shares identical electrical specs, package, and marking with DFLZ11Q, except DFLZ11Q undergoes additional AEC-Q200 stress testing (temperature cycling, HAST, mechanical shock). For industrial or commercial use, DFLZ11-7 is fully functionally equivalent and cost-optimized.
How does the cathode-tab construction affect PCB layout requirements?
The exposed cathode tab requires a minimum 1"×1" 2 oz. copper pad connected to ground or low-impedance return plane. Thermal vias (≥4×0.3mm) beneath the tab are recommended for >500 mW continuous operation to maintain TJ < 125°C per JEDEC JESD51-2.
Is the DFLZ11-7 compatible with lead-free reflow profiles per J-STD-020?
Yes - it is rated for peak reflow temperatures up to 260°C (10 sec max), with moisture sensitivity Level 1. Matte tin annealed terminations ensure reliable solder joint formation across standard SnAgCu profiles without dewetting or voiding.
DFLZ11-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 4 µA @ 8.2 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
DFLZ11-7 FAQ
1.How can I place an order for DFLZ11-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ11-7 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 DFLZ11-7 reliable?
The price and inventory of DFLZ11-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ11-7 is usually 5 days.
3.What payment methods are accepted for DFLZ11-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ11-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ11-7?
DFLZ11-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ11-7 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 DFLZ11-7?
For technical support, including DFLZ11-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ11-7 requirements.
6.How does Aetrix verify that DFLZ11-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ11-7 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 DFLZ11-7 meets industry standards.
7.What is the process for return or replacement of DFLZ11-7?
All DFLZ11-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ11-7, 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 DFLZ11-7 part is unused and in its original packaging.
Return procedure for DFLZ11-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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