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Diodes Incorporated DFLZ12-7
- Part No.:
- DFLZ12-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ12-7.pdf
- Description:
- DIODE ZENER 12V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:38,398
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Product details
Overview
DFLZ12-7 from Diodes Incorporated is a 12 V, 1.0 W surface-mount power Zener diode in PowerDI123 package, rated for 50 mA test current (IZT), with 9.1 Ω maximum zener impedance (ZZT) and ±0.10 %/°C temperature coefficient. It provides precision voltage regulation in low-power supply rails, overvoltage protection circuits, and reference voltage generation for industrial sensor interfaces.
For engineers reviewing the DFLZ12-7 datasheet, DFLZ12-7 pinout, DFLZ12-7 application, or DFLZ12-7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance junction-to-soldering point (9 °C/W), reverse leakage at VR (5 µA max @ 9.1 V), and automotive-qualified variants (DFLZ12Q-7) for harsh-environment designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 12 V nominal zener voltage is specified at IZT = 50 mA, with tight 11.4–12.7 V min/max range and low dynamic impedance enabling accurate regulation in feedback loops.
The PowerDI123 package delivers 1.0 W power dissipation on FR-4 PCB with 2 oz. copper, supported by low RθJS (9 °C/W) and JEDEC-qualified reliability for high-reliability applications. Cathode-band marking and matte tin–annealed terminals ensure consistent solderability and polarity identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.7 V range at 50 mA - ensures stable reference within ±5% tolerance for supply monitoring |
| Power Dissipation (PD) | 1.0 W on FR-4 PCB - supports continuous regulation in compact industrial power stages without forced cooling |
| Zener Impedance (ZZT) | 9.1 Ω max at 50 mA - minimizes output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 5 µA max at 9.1 V - limits quiescent current in battery-backed or low-power standby circuits |
| Temp. Coefficient | ±0.10 %/°C - enables predictable drift compensation in temperature-sensitive analog references |
| Thermal Resistance (RθJS) | 9 °C/W - allows direct thermal path to PCB copper, critical for sustained 1W operation in confined layouts |
| Operating Temp. | −55 to +150 °C - qualified for extended-range industrial and automotive under-hood environments |
Pinout & Package
Package: PowerDI123 - surface-mount, single-ended cathode-band-marked plastic package with exposed cathode tab for thermal conduction and polarity identification. Dimensions: 1.78 mm × 3.70 mm × 0.98 mm (L × W × H); weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse-biased reference node | Connected to lower-potential rail; forms regulated output node when cathode is tied to higher potential |
| Cathode | Zener breakdown terminal / Voltage reference output | Marked with band; connected to regulated voltage source; serves as thermal interface to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| 1.0 W Power Rating | Enables use in higher-current shunt regulators without external heat sinking on standard FR-4 boards |
| JEDEC High-Reliability Qualification | Validated per AEC-Q stress tests - suitable for industrial control modules requiring long-term parametric stability |
| Lead-Free & Halogen-Free | Meets RoHS 3 and "Green" definitions (<900 ppm Br/Cl, <1000 ppm Sb) - compliant for eco-sensitive consumer and medical products |
| Cathode Band Polarity Marking | Eliminates assembly errors in automated placement; visible under optical inspection and AOI systems |
Applications
| Industrial Power Monitoring | Automotive Sensor Reference |
|---|---|
Use Scenario: Monitoring 12 V vehicle battery voltage in engine control units with wide ambient temperature swings. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and overvoltage clamp. Use Value: Stable 12 V reference ensures ±0.6% measurement accuracy across −40 to +125 °C due to low tempco and tight VZ tolerance. |
Use Scenario: Providing bias voltage to MEMS pressure sensors in brake fluid reservoirs. IC Role / Device Role / Timing Role: Precision shunt regulator supplying clean 12 V to analog front-end circuitry. Use Value: Low ZZT (9.1 Ω) prevents sensor output drift during transient load spikes from signal conditioning amplifiers. |
| Programmable Logic Supply Clamp | IoT Node Voltage Reference |
Use Scenario: Protecting FPGA I/O banks from ESD-induced overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting voltage to 12.7 V peak. Use Value: 5 µA IR at 9.1 V ensures negligible standby current drain while maintaining fast turn-on for transients. |
Use Scenario: Generating stable reference for ultra-low-power ADCs in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference for ratiometric sensor excitation. Use Value: −55 to +150 °C operating range and 9 °C/W RθJS enable reliable operation inside sealed outdoor enclosures without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12-7 | 0.3 W rating, SOT-23 package, 12 V ±5%, 25 Ω ZZT max | Limited to low-power signal-level clamping; unsuitable for >100 mA shunt loads | Select when board space is constrained and power dissipation ≤300 mW |
| MMSZ5242B-7 | 0.5 W rating, SOD-123 package, 12 V ±5%, 33 Ω ZZT max | Higher impedance causes greater regulation error under load; not JEDEC-qualified | Choose only for cost-sensitive consumer applications where AEC-Q compliance is unnecessary |
Compared with BZX84-C12-7 and MMSZ5242B-7, DFLZ12-7 delivers 3.3× higher power handling, 3.6× lower dynamic impedance, and formal automotive qualification - making it the sole choice for industrial-grade shunt regulation demanding thermal robustness and long-term stability.
Availability
DFLZ12-7 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive sensor reference, programmable logic supply clamp, and IoT node voltage reference requiring stable component supply across multi-year production cycles.
Supply support for DFLZ12-7 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 automotive, industrial, and computing power systems where thermal performance and parametric consistency are critical.
FAQ
What is the maximum reverse voltage (VR) at which DFLZ12-7 guarantees ≤5 µA leakage?
DFLZ12-7 guarantees ≤5 µA reverse leakage current at VR = 9.1 V, per the Electrical Characteristics table. This value is derived from the 76% rule (0.76 × VZ = 0.76 × 12 V ≈ 9.1 V) used for Zener devices to define safe non-breakdown operating limits below nominal breakdown voltage.
Can DFLZ12-7 be used in place of DFLZ12Q-7 in automotive designs?
No - DFLZ12Q-7 is the AEC-Q200-qualified variant with additional stress testing (temperature cycling, humidity bias, mechanical shock). DFLZ12-7 lacks this qualification and must not be substituted in safety-critical automotive applications unless re-validated per OEM requirements.
How does the PowerDI123 package improve thermal performance versus SOD-123?
PowerDI123 achieves RθJS = 9 °C/W versus ~20–25 °C/W for SOD-123 due to its larger copper leadframe and exposed cathode tab that bonds directly to PCB copper. This enables full 1.0 W dissipation without derating at +70 °C ambient, unlike SOD-123 which typically derates above 50 °C.
Is the 12 V zener voltage specified at DC or pulsed conditions?
The 12 V nominal zener voltage is specified under DC conditions at IZT = 50 mA, per JEDEC Test Method JESD24-A. The datasheet explicitly states "short duration pulse test used to minimize self-heating effect" applies only to the min/max VZ limits - the typical value and regulation behavior are DC-rated.
DFLZ12-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 9.1 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
DFLZ12-7 FAQ
1.How can I place an order for DFLZ12-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ12-7 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 DFLZ12-7 reliable?
The price and inventory of DFLZ12-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ12-7 is usually 5 days.
3.What payment methods are accepted for DFLZ12-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ12-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ12-7?
DFLZ12-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ12-7 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 DFLZ12-7?
For technical support, including DFLZ12-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ12-7 requirements.
6.How does Aetrix verify that DFLZ12-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ12-7 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 DFLZ12-7 meets industry standards.
7.What is the process for return or replacement of DFLZ12-7?
All DFLZ12-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ12-7, 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 DFLZ12-7 part is unused and in its original packaging.
Return procedure for DFLZ12-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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