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Diodes Incorporated DFLZ16Q-7
- Part No.:
- DFLZ16Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ16Q-7.pdf
- Description:
- DIODE ZENER 16V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:2,870
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Product details
Overview
DFLZ16Q-7 from Diodes Incorporated is a 16 V, 1.0 W surface-mount Zener diode in PowerDI123 package, rated for 100 mA Zener test current (IZT), with typical Zener impedance of 1 Ω and maximum reverse leakage of 1 µA at 12 V. It delivers stable voltage regulation in automotive power supply rails and industrial overvoltage protection circuits.
For engineers reviewing the DFLZ16Q-7 datasheet, DFLZ16Q-7 pinout, DFLZ16Q-7 application, or DFLZ16Q-7 equivalent, key selection criteria include its AEC-Q101 qualification, 9 °C/W junction-to-solder-point thermal resistance, ±0.06%/°C temperature coefficient, and 15 Ω maximum Zener impedance at 1 mA.
Technical Context
This Zener diode operates in reverse breakdown to clamp voltage at 16 V nominal (15.3–17.1 V range) with low dynamic impedance (1 Ω typ at 100 mA), enabling precise regulation under transient load conditions. Its PowerDI123 package features an exposed cathode pad for direct PCB heat sinking.
The device meets AEC-Q101 stress testing requirements for automotive reliability and exhibits a low thermal resistance of 9 °C/W (junction-to-solder point), allowing sustained 1 W dissipation on FR-4 with 1"×1" copper pad - critical for engine control unit (ECU) and body electronics surge suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, 15.3–17.1 V min/max - defines clamping threshold for 12 V system overvoltage protection |
| Power Dissipation (PD) | 1.0 W - supports continuous regulation in compact automotive PCB layouts without forced air cooling |
| Zener Impedance (ZZT) | 1 Ω typical at 100 mA - ensures minimal output voltage deviation during fast current transients |
| Thermal Resistance (RθJS) | 9 °C/W - enables efficient heat transfer from die to solder joint, reducing junction temperature rise |
| Temperature Coefficient | +0.06%/°C max - limits drift to <±1% over -40°C to +125°C operating range |
| Reverse Leakage (IR) | 1 µA max at 12 V - guarantees negligible standby current in always-on vehicle modules |
Pinout & Package
Package: PowerDI123 - molded plastic case with exposed cathode pad for thermal conduction; UL 94V-0 rated; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse bias reference | Connected to lower-potential node (e.g., ground or return path) during Zener operation |
| Cathode | Reverse breakdown terminal / Heat sink interface | Exposed metal tab soldered directly to PCB copper pour for thermal management and electrical connection to regulated rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including ECU, lighting, and ADAS sensor power rails |
| 1 W power rating on FR-4 | Enables robust overvoltage clamping without heatsink in space-constrained modules |
| Patented interlocking clip design | Supports 8/20 µs surge currents up to 30 A per IEC 61000-4-5 Level 4 compliance |
| Lead-free, halogen-free "Green" construction | Meets RoHS 3 (2015/863/EU) and automotive ELV directive requirements |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping 12 V supply rail against load dump transients up to 40 V. IC Role / Device Role / Timing Role: Primary overvoltage protection element placed across microcontroller power input. Use Value: Limits peak voltage to ≤17.1 V with <1 µA leakage, preserving MCU integrity during ISO 7637-2 pulse 5a events. | Use Scenario: Protecting 24 V digital input channels from field-wiring induced surges. IC Role / Device Role / Timing Role: Standby shunt regulator absorbing transient energy before optocoupler input stage. Use Value: Maintains channel logic state during 1 kV/µs fast transients due to 1 Ω dynamic impedance and 9 °C/W thermal path. |
| LED Headlamp Driver Feedback | Telecom Power Supply Reference |
Use Scenario: Stabilizing feedback voltage for constant-current LED driver ICs in adaptive driving beam systems. IC Role / Device Role / Timing Role: Precision voltage reference in closed-loop current regulation circuit. Use Value: Delivers ±0.06%/°C TC and 15.3–17.1 V tolerance, ensuring <±2% LED current variation over -40°C to +125°C. | Use Scenario: Providing stable 16 V bias for hot-swap controller gate drivers in 48 V telecom rectifiers. IC Role / Device Role / Timing Role: Secondary voltage clamp preventing MOSFET gate oxide overstress during inrush. Use Value: Withstands repeated 100 ms surges at 1 W without parameter shift, verified per AEC-Q101 HTRB testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16-7-F | 0.3 W rating, SOT-23 package, 40 Ω Zz max at 5 mA - higher impedance, lower power handling | Suitable only for low-power signal-level clamping; not rated for automotive surge | Select when board space is critical and surge immunity is not required |
| MMSZ5245B-7-F | 0.5 W rating, SOD-123 package, 20 Ω Zz max at 20 mA - moderate power, no AEC-Q101 qualification | Limited to commercial-grade power supplies; lacks PPAP documentation support | Select for cost-sensitive industrial designs where automotive traceability is unnecessary |
Compared with BZX84-C16-7-F and MMSZ5245B-7-F, DFLZ16Q-7 provides 3.3× higher power dissipation, 20× lower Zener impedance at rated current, and full AEC-Q101 qualification - making it the sole choice for production automotive voltage regulation where thermal stability and surge survivability are mandatory.
Availability
DFLZ16Q-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, LED headlamp drivers, and telecom power supply reference circuits requiring stable component supply across multi-year production cycles.
Supply support for DFLZ16Q-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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The DFLZ series belongs to Diodes' AEC-Q101-qualified Zener diode product line, engineered specifically for automotive and industrial power rail stabilization where high surge capacity, low thermal resistance, and long-term parametric stability are essential.
FAQ
What is the maximum surge current DFLZ16Q-7 can withstand?
DFLZ16Q-7 supports 8/20 µs surge currents up to 30 A, validated by its patented interlocking clip design (US Patent #7,095,113) and AEC-Q101 transient surge testing. This capability enables compliance with ISO 7637-2 Pulse 5a (load dump) in automotive 12 V systems without external TVS supplementation.
Does DFLZ16Q-7 require a heatsink on standard FR-4 PCB?
No external heatsink is required. When mounted on a 1" × 1", 2 oz. copper pad on FR-4, DFLZ16Q-7 achieves 1 W continuous dissipation with a junction-to-ambient thermal resistance of 110 °C/W and junction-to-solder-point resistance of just 9 °C/W - sufficient for most automotive and industrial applications.
How does the temperature coefficient affect regulation accuracy over temperature?
With a maximum temperature coefficient of +0.06%/°C, DFLZ16Q-7 exhibits ≤±0.72% total voltage drift across a -40°C to +125°C range. At 125°C, the Zener voltage shifts to approximately 16.12 V - well within the 15.3–17.1 V initial tolerance band, ensuring reliable clamping in under-hood environments.
Is DFLZ16Q-7 compatible with lead-free reflow profiles?
Yes. DFLZ16Q-7 uses matte tin annealed over copper leadframe and is qualified for standard JEDEC J-STD-020 lead-free reflow profiles (peak temperature 260°C, 60 seconds max). Its PowerDI123 package has moisture sensitivity level 1, eliminating bake requirements prior to assembly.
DFLZ16Q-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):
- 16 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 12 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
DFLZ16Q-7 FAQ
1.How can I place an order for DFLZ16Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ16Q-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 DFLZ16Q-7 reliable?
The price and inventory of DFLZ16Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ16Q-7 is usually 5 days.
3.What payment methods are accepted for DFLZ16Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ16Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ16Q-7?
DFLZ16Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ16Q-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 DFLZ16Q-7?
For technical support, including DFLZ16Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ16Q-7 requirements.
6.How does Aetrix verify that DFLZ16Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ16Q-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 DFLZ16Q-7 meets industry standards.
7.What is the process for return or replacement of DFLZ16Q-7?
All DFLZ16Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ16Q-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 DFLZ16Q-7 part is unused and in its original packaging.
Return procedure for DFLZ16Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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