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Diodes Incorporated DFLZ30-7
- Part No.:
- DFLZ30-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ30-7.pdf
- Description:
- DIODE ZENER 30V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:6,259
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Product details
Overview
DFLZ30-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, rated for 30V nominal Zener voltage (28–32V range) at 25mA test current, with 8Ω typical Zener impedance and ±0.06%/°C temperature coefficient. It provides precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters.
For engineers reviewing the DFLZ30-7 datasheet, DFLZ30-7 pinout, DFLZ30-7 application, or DFLZ30-7 equivalent, key selection criteria include its 1.0W dissipation on FR-4 PCB, cathode-band polarity marking, JEDEC-qualified reliability, automotive-grade variant availability (DFLZ30Q), and thermal resistance of 9°C/W junction-to-soldering-point.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and line conditions. Its 30V nominal rating targets mid-range DC bus monitoring and auxiliary rail regulation in 24V/36V systems.
Designed for surface-mount assembly on standard FR-4 PCBs, it delivers 1.0W power dissipation with RθJA = 110°C/W and RθJS = 9°C/W, enabling reliable thermal performance without heatsinking in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V nominal (28–32 V min/max), specified at IZT = 25 mA - defines regulation setpoint accuracy for feedback networks. |
| Power Dissipation (PD) | 1.0 W on 1.5" × 1.5" FR-4 PCB with 2 oz. Cu - sets maximum continuous operating power without derating. |
| Zener Impedance (ZZT) | 8 Ω typical at IZT = 25 mA - determines AC ripple rejection and regulation stiffness under dynamic load changes. |
| Reverse Current (IR) | 1 µA max at VR = 22 V - ensures low leakage in high-impedance bias/reference paths. |
| Temp. Coefficient (αVZ) | ±0.06 %/°C - enables predictable drift compensation in temperature-sensitive references. |
| Thermal Resistance (RθJS) | 9 °C/W junction-to-soldering-point - supports direct thermal coupling to PCB copper for efficient heat transfer. |
Pinout & Package
Package: PowerDI123 - molded plastic, UL 94V-0 rated, 0.01 g weight, cathode band marking, matte tin annealed terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to system ground or lower-potential node in shunt regulator configuration. |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to input rail or feedback point; voltage referenced to anode defines regulation level. |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating on standard FR-4 | Enables robust voltage clamping in space-constrained industrial power supplies without external heatsinks. |
| JEDEC-qualified high-reliability construction | Validated per AEC-Q standards for extended lifetime in harsh ambient environments (−55°C to +150°C). |
| Cathode band polarity marking | Ensures unambiguous orientation during automated placement and visual inspection on production lines. |
| Halogen- and antimony-free "Green" compound | Meets RoHS 3 (2015/863/EU) with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - supports eco-compliant manufacturing. |
Applications
| Industrial Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating 30V auxiliary rail in isolated DC-DC converter secondary side. IC Role / Device Role / Timing Role: Shunt voltage reference in TL431-based feedback loop. Use Value: Maintains ±2% output regulation across 0–100% load with 8Ω ZZT minimizing error amplifier gain dependency. |
Use Scenario: Protecting 30V-rated microcontroller I/O pins from transient surges. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered above 32V. Use Value: Limits clamping voltage to ≤32V with 1µA leakage preserving signal integrity at normal operation. |
| Automotive Body Control Module Reference | Programmable Voltage Threshold Detector |
Use Scenario: Providing stable 30V reference for LIN bus transceiver biasing in BCM. IC Role / Device Role / Timing Role: Precision voltage source for analog comparator input. Use Value: ±0.06%/°C TC ensures <±0.3V drift over −40°C to +125°C ambient, meeting AEC-Q200 Class 1 requirements. |
Use Scenario: Setting trip point for battery voltage monitor in solar charge controller. IC Role / Device Role / Timing Role: Zener-based threshold element feeding comparator hysteresis network. Use Value: 28–32V tolerance window allows design margin against battery float voltage variations while maintaining detection repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30 (ON Semiconductor) | 300 mW rating, SOT-23 package, 30V ±5%, ZZT = 45 Ω typical | Limited to low-power signal-level references; unsuitable for >100 mA shunt loads | Select when board space is critical and power dissipation remains below 300 mW. |
| 1N5361B (Microchip) | 5.0W rating, DO-41 through-hole, 30V ±5%, ZZT = 0.9 Ω typical | Requires PCB real estate for axial lead mounting and thermal relief pads | Select when higher power handling and lower impedance are required, and through-hole assembly is acceptable. |
Compared with BZX84-C30 and 1N5361B, DFLZ30-7 uniquely balances 1.0W surface-mount capability, 8Ω impedance, and JEDEC-qualified reliability-making it optimal for mid-power industrial and automotive modules where space, thermal performance, and qualification compliance are jointly constrained.
Availability
DFLZ30-7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable voltage threshold detectors requiring stable component supply and long-term lifecycle support.
Supply support for DFLZ30-7 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 belongs to Diodes' Power Discrete product line, engineered specifically for high-reliability voltage regulation and protection in industrial, automotive, and computing power systems.
FAQ
What is the maximum continuous reverse voltage DFLZ30-7 can withstand before breakdown?
DFLZ30-7 is rated for a nominal Zener voltage of 30 V at 25 mA test current, with a guaranteed range of 28 V to 32 V. Breakdown begins within this range under specified test conditions; operation above 32 V may cause irreversible thermal runaway unless current is strictly limited by external series resistance.
Does DFLZ30-7 require a heatsink for 1.0W operation?
No heatsink is required. The device achieves 1.0W dissipation on a standard 1.5" × 1.5", 2 oz. copper FR-4 PCB with recommended pad layout. Its RθJS of 9°C/W enables direct thermal conduction to the PCB copper plane, eliminating need for additional thermal hardware in most designs.
Is there an automotive-qualified version of DFLZ30-7?
Yes - the DFLZ30Q variant is AEC-Q200 qualified and documented in a separate datasheet (DS30464Q). It shares identical electrical specifications and PowerDI123 packaging but undergoes additional stress testing for automotive under-hood applications including temperature cycling and humidity bias life validation.
How does the ±0.06%/°C temperature coefficient affect long-term stability in a 30V reference circuit?
Over a −40°C to +125°C ambient range, the coefficient contributes up to ±9.9 mV/°C × 165°C = ±1.63 V total drift. Combined with initial 28–32V tolerance, final regulation stays within 26.4–33.6 V - sufficient for non-critical 30V rails where ±5% accuracy is acceptable without active compensation.
DFLZ30-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±7%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 22 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
DFLZ30-7 FAQ
1.How can I place an order for DFLZ30-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ30-7 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 DFLZ30-7 reliable?
The price and inventory of DFLZ30-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ30-7 is usually 5 days.
3.What payment methods are accepted for DFLZ30-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ30-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ30-7?
DFLZ30-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ30-7 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 DFLZ30-7?
For technical support, including DFLZ30-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ30-7 requirements.
6.How does Aetrix verify that DFLZ30-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ30-7 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 DFLZ30-7 meets industry standards.
7.What is the process for return or replacement of DFLZ30-7?
All DFLZ30-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ30-7, 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 DFLZ30-7 part is unused and in its original packaging.
Return procedure for DFLZ30-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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