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Diodes Incorporated DFLZ5V1Q-7
- Part No.:
- DFLZ5V1Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ5V1Q-7.pdf
- Description:
- DIODE ZENER 5.1V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:3,925
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Product details
Overview
DFLZ5V1Q-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, with nominal Zener voltage 5.1V (±5% tolerance), 100mA test current, 2Ω typical Zener impedance, and -0.08%/°C to +0.02%/°C temperature coefficient. It delivers stable voltage regulation in automotive power supply rails and industrial overvoltage protection circuits.
For engineers reviewing the DFLZ5V1Q-7 datasheet, DFLZ5V1Q-7 pinout, DFLZ5V1Q-7 application, or DFLZ5V1Q-7 equivalent, key selection criteria include Zener voltage accuracy at 100mA, thermal resistance of 9°C/W junction-to-solder point, AEC-Q101 qualification, RoHS-compliant lead-free finish, and 1W dissipation on FR-4 PCB.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp voltage at 5.1V with low dynamic impedance (2Ω typ) under 100mA test current, enabling precise regulation in feedback loops and reference circuits. Its patented interlocking clip design supports high-surge capacity per US Patent #7,095,113.
Thermally optimized for automotive-grade reliability, it achieves 9°C/W junction-to-solder thermal resistance and derates linearly above 25°C ambient, maintaining 1W dissipation up to +125°C ambient per Figure 1. The device is qualified to AEC-Q101 and rated for -55°C to +150°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1V nominal, 4.8–5.4V min/max at IZT = 100mA - ensures ±5% regulation window for 5V rail stabilization |
| Power Dissipation (PD) | 1.0W on FR-4 PCB with 1"×1" copper pad - supports sustained clamping in transient overvoltage events |
| Zener Impedance (Zzt) | 2Ω typical at IZT = 100mA - minimizes output voltage deviation under load variation |
| Thermal Resistance (RθJS) | 9°C/W junction-to-solder point - enables efficient heat transfer to PCB ground plane |
| Temperature Coefficient | -0.08 to +0.02%/°C - guarantees low drift across automotive temperature range (-40°C to +125°C) |
| Reverse Leakage (IR) | 2.5µA max at VR = 1V - ensures minimal standby current in always-on monitoring circuits |
| Forward Voltage (VF) | 1.2V at IF = 200mA - defines conduction loss when used in bidirectional ESD paths |
Pinout & Package
Package: PowerDI123 - molded plastic case with large exposed cathode pad for thermal and mechanical robustness; UL 94V-0 flammability rating; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node during surge clamping or reference use |
| Cathode | Current exit terminal in forward bias; Zener breakdown terminal in reverse bias | Exposed metal pad soldered directly to PCB thermal pad - primary heat path and voltage reference node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics per stress test requirements |
| Patented interlocking clip | US Patent #7,095,113 - increases surge current handling beyond standard Zener limits |
| Lead-free & halogen-free | RoHS 3 compliant; <900ppm Br/Cl, <1000ppm Sb - meets global environmental mandates |
| Low RθJS | 9°C/W junction-to-solder - reduces thermal runaway risk in compact layouts |
| PPAP capability | Full production part approval process support for Tier-1 automotive suppliers |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamp | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamps 12V battery-supplied microcontroller power rail during load-dump transients. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage to ≤5.4V at 100mA. Use Value: Prevents MCU reset or latch-up by holding rail within 5.1V ±5% window during 40ms, 35V pulses. | Use Scenario: Protects 4–20mA current-loop receiver input from field-wiring induced surges. IC Role / Device Role / Timing Role: Bidirectional transient suppressor with 1.2V forward conduction and 5.1V reverse clamping. Use Value: Limits input voltage to ADC front-end without adding series resistance or signal distortion. |
| Medical Infusion Pump Voltage Reference | Telecom Base Station DC-DC Feedback Divider |
Use Scenario: Provides stable 5.1V reference for precision DAC controlling motor current. IC Role / Device Role / Timing Role: Shunt regulator with 2Ω Zzt and <0.08%/°C TC ensuring <10mV drift over 0–50°C. Use Value: Enables ±0.1% dose accuracy by minimizing reference voltage error in closed-loop control. | Use Scenario: Sets output voltage of isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision shunt reference with 100mA test current and low leakage (<2.5µA @ 1V). Use Value: Maintains ±1% output regulation across line/load/transient conditions without external op-amp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V1-7-F | 350mW rating, SOT-23 package, 40Ω Zzt, no AEC-Q101 qualification | Limited to low-power consumer electronics; unsuitable for automotive transients | Select only for cost-sensitive, non-automotive designs with <350mW dissipation needs |
| MMSZ5222B-7-F | 500mW rating, SOD-123 package, 17Ω Zzt, AEC-Q101 qualified but no interlocking clip | Acceptable for moderate-surge industrial use but lacks DFLZ5V1Q-7's 1W surge margin | Choose when board space is constrained and 500mW suffices; verify thermal layout separately |
Compared with BZX84-C5V1-7-F and MMSZ5222B-7-F, DFLZ5V1Q-7 provides 2.8× higher power rating, 8–20× lower Zener impedance, and patented surge structure - making it uniquely suited for automotive and high-reliability industrial clamping where thermal stability and transient immunity are critical.
Availability
DFLZ5V1Q-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, medical infusion pumps, and telecom base station power supplies requiring stable component supply and AEC-Q101 compliance.
Supply support for DFLZ5V1Q-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 and manufacturing operations across Asia and the Americas.
The DFLZ series targets high-reliability Zener regulation in automotive and industrial environments, emphasizing thermal performance, surge resilience, and regulatory compliance - not general-purpose voltage reference use.
FAQ
What is the maximum continuous reverse voltage DFLZ5V1Q-7 can withstand before breakdown?
The DFLZ5V1Q-7 has a nominal Zener voltage of 5.1V with a guaranteed range of 4.8V to 5.4V at 100mA test current. It begins controlled reverse breakdown within this band and is not rated for continuous operation above 5.4V - exceeding this risks thermal runaway due to unregulated power dissipation.
How does the PowerDI123 package improve thermal performance compared to SOD-123?
The PowerDI123 package features an exposed cathode pad that provides direct thermal conduction to the PCB, achieving 9°C/W junction-to-solder resistance versus ~120°C/W for standard SOD-123. This allows 1W dissipation on FR-4 versus ~350mW for SOD-123, verified per JEDEC JESD51-2A testing.
Is DFLZ5V1Q-7 suitable for bidirectional ESD protection?
No - DFLZ5V1Q-7 is a unidirectional Zener diode with cathode band marking. Its forward voltage is 1.2V at 200mA, but it lacks symmetric clamping characteristics. For bidirectional ESD protection, TVS diodes such as D28V0L4BCP-7 are specifically designed with matched forward/reverse breakdown.
Does the -7 suffix indicate tape-and-reel packaging only, or does it affect electrical specs?
The -7 suffix denotes 3000-unit tape-and-reel packaging per AEC-Q101 ordering convention and has no effect on electrical or thermal specifications. All DFLZ5V1Q-7 units share identical Zener voltage, impedance, and thermal characteristics regardless of packaging format.
DFLZ5V1Q-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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 2.5 µA @ 1 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
DFLZ5V1Q-7 FAQ
1.How can I place an order for DFLZ5V1Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ5V1Q-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 DFLZ5V1Q-7 reliable?
The price and inventory of DFLZ5V1Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ5V1Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ5V1Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ5V1Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ5V1Q-7?
DFLZ5V1Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ5V1Q-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 DFLZ5V1Q-7?
For technical support, including DFLZ5V1Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ5V1Q-7 requirements.
6.How does Aetrix verify that DFLZ5V1Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ5V1Q-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 DFLZ5V1Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ5V1Q-7?
All DFLZ5V1Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ5V1Q-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 DFLZ5V1Q-7 part is unused and in its original packaging.
Return procedure for DFLZ5V1Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLZ5V1Q-7 Tags
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