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Diodes Incorporated DFLZ5V1-7
- Part No.:
- DFLZ5V1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ5V1-7.pdf
- Description:
- DIODE ZENER 5.1V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:30,169
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Product details
Overview
DFLZ5V1-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, providing precise 5.1V nominal zener voltage at 100mA test current, with ±5% tolerance (4.8–5.4V), 2Ω typical zener impedance, and -0.08 to +0.02%/°C temperature coefficient - used for voltage regulation and overvoltage protection in automotive body control modules and industrial power supply feedback loops.
For engineers reviewing the DFLZ5V1-7 datasheet, DFLZ5V1-7 pinout, DFLZ5V1-7 application, or DFLZ5V1-7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (9°C/W junction-to-solder point), JEDEC-qualified reliability, RoHS/Green compliance, and FR-4 PCB power dissipation capability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its low 2Ω typical zener impedance ensures minimal voltage deviation across 10–100mA operating current range, while the -0.08 to +0.02%/°C temperature coefficient enables predictable drift behavior in ambient ranges from -55°C to +150°C.
Designed for high-reliability surface-mount applications, it meets AEC-Q stress qualification standards and features matte tin-annealed copper leadframe terminals for robust solderability. The PowerDI123 package delivers 1.0W power dissipation on standard FR-4 PCBs with 1"x1" copper pad layout, supported by 110°C/W junction-to-ambient thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V nominal at 100 mA - defines regulated output voltage in shunt regulator circuits |
| Zener Voltage Range | 4.8–5.4 V - ensures production yield compliance and design margin for 5.1V systems |
| Zener Impedance (ZZT) | 2 Ω typical at 100 mA - determines AC ripple rejection and load regulation stability |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB - sets maximum continuous power handling without heatsink |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-solder point - enables accurate thermal modeling for board-level reliability |
| Reverse Current (IR) | 2.5 µA max at 3.0 V - guarantees low leakage in standby or battery-backed circuits |
| Temperature Coefficient | -0.08 to +0.02 %/°C - allows predictable voltage drift compensation in wide-temperature designs |
Pinout & Package
Package: PowerDI123 - compact 3-pin surface-mount package with cathode band marking, 0.01 g mass, UL 94V-0 molded plastic housing, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground in shunt regulator configuration; forms reference node for feedback networks |
| Cathode | Reverse-biased Zener terminal / voltage regulation node | Connected to input rail; clamps voltage at VZ when reverse current exceeds threshold |
| Cathode Band | Visual polarity indicator | Identifies cathode terminal on top view; critical for correct orientation during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating on FR-4 | Enables direct integration into cost-sensitive consumer and industrial power supplies without external heatsinking |
| JEDEC-qualified reliability | Validated for automotive-grade stress testing (AEC-Q), supporting use in under-hood and body electronics |
| RoHS-compliant & Halogen-free | Meets EU Directive 2015/863/EU with <900ppm Br/Cl and <1000ppm Sb - supports green manufacturing requirements |
| Low RθJS = 9°C/W | Facilitates accurate thermal simulation and improves long-term parametric stability in sealed enclosures |
| Cathode band marking | Ensures unambiguous polarity identification during AOI inspection and rework of fine-pitch SMT assemblies |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Voltage clamping on 5V sensor supply rail exposed to load dump transients. IC Role / Device Role / Timing Role: Shunt regulator and transient suppressor protecting ADC reference and microcontroller I/O. Use Value: Maintains 5.1V regulation within ±0.3V over -40°C to +125°C, preventing sensor data corruption during ESD events. |
Use Scenario: Overvoltage protection for 4–20mA loop receiver front-end. IC Role / Device Role / Timing Role: Precision clamp limiting input voltage to protect op-amp inputs and ADC drivers. Use Value: 2.5µA max reverse leakage at 3V ensures minimal error contribution to µA-level current measurement accuracy. |
| Consumer SMPS Feedback Network | Medical Device Power Sequencing |
Use Scenario: Secondary-side voltage reference in isolated flyback converter feedback path. IC Role / Device Role / Timing Role: Zener-based optocoupler biasing element establishing stable 5.1V reference for TL431 replacement. Use Value: 2Ω typical zener impedance reduces feedback loop noise gain, improving output voltage stability under dynamic load steps. |
Use Scenario: Power-rail sequencing monitor in battery-powered diagnostic equipment. IC Role / Device Role / Timing Role: Low-leakage voltage supervisor enabling controlled enable/disable of LDOs and DC-DC converters. Use Value: -55°C to +150°C operating range supports sterilization cycles and extended shelf-life storage requirements. |
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 (Nexperia) | 350mW rating, SOT-23 package, 40Ω typical ZZT, ±5% VZ | Limited to low-power signal-level clamping; unsuitable for >100mA regulation | Select when board space is constrained and power demand is ≤350mW |
| MMSZ5222BS (ON Semiconductor) | 500mW rating, SOD-123 package, 17Ω typical ZZT, ±5% VZ | Lower thermal performance (RθJA ≈ 300°C/W) limits sustained current handling | Choose for cost-sensitive consumer applications where 1W capability is not required |
Compared with BZX84-C5V1 and MMSZ5222BS, DFLZ5V1-7 delivers 2× higher power rating, 8–10× lower zener impedance, and 12× better thermal resistance - making it uniquely suitable for automotive and industrial power regulation where sustained current, precision, and thermal robustness are critical.
Availability
DFLZ5V1-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and medical device power management requiring stable component supply with full traceability and lifecycle support.
Supply support for DFLZ5V1-7 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, specializing in high-reliability components for automotive, industrial, and computing markets.
The DFLZ series belongs to Diodes' Power Discrete product line, engineered specifically for surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding environments.
FAQ
What is the maximum continuous reverse current the DFLZ5V1-7 can handle without degradation?
The DFLZ5V1-7 is rated for 100 mA zener test current (IZT) and supports continuous reverse current up to its 1.0W power limit - approximately 196 mA at 5.1V (P = V × I). Derating per Figure 1 applies above 25°C ambient; at 100°C, max current drops to ~125 mA to maintain safe junction temperature.
Does the DFLZ5V1-7 meet automotive qualification standards?
Yes - the DFLZ5V1-7 is qualified to JEDEC standards referenced in AEC-Q200 for passive components. An automotive-compliant variant (DFLZ5V1Q) is also available under a separate datasheet with additional PPAP documentation and extended temperature screening.
How does the PowerDI123 package compare thermally to SOD-123 or DO-214AC?
PowerDI123 offers 9°C/W junction-to-solder-point thermal resistance - significantly lower than SOD-123 (~200°C/W) and DO-214AC (~40°C/W) - due to its exposed cathode tab acting as a thermal path to the PCB. This enables higher power density and improved long-term reliability in thermally constrained layouts.
Can DFLZ5V1-7 be used in place of a TL431-based shunt regulator?
No - DFLZ5V1-7 is a two-terminal Zener diode without adjustable reference or active amplification. It replaces fixed-voltage references only; TL431 substitution requires redesigning feedback topology and adding external resistors to set output voltage, as DFLZ5V1-7 lacks programmability or current-sink capability.
DFLZ5V1-7 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:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 6 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
DFLZ5V1-7 FAQ
1.How can I place an order for DFLZ5V1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ5V1-7 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 DFLZ5V1-7 reliable?
The price and inventory of DFLZ5V1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ5V1-7 is usually 5 days.
3.What payment methods are accepted for DFLZ5V1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ5V1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ5V1-7?
DFLZ5V1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ5V1-7 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 DFLZ5V1-7?
For technical support, including DFLZ5V1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ5V1-7 requirements.
6.How does Aetrix verify that DFLZ5V1-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ5V1-7 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 DFLZ5V1-7 meets industry standards.
7.What is the process for return or replacement of DFLZ5V1-7?
All DFLZ5V1-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ5V1-7, 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 DFLZ5V1-7 part is unused and in its original packaging.
Return procedure for DFLZ5V1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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