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Diodes Incorporated DFLZ9V1-7
- Part No.:
- DFLZ9V1-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ9V1-7.pdf
- Description:
- DIODE ZENER 9.1V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:4,721
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Product details
Overview
DFLZ9V1-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, rated for 9.1V nominal Zener voltage at 50mA test current, with 1Ω typical Zener impedance and ±0.03%/°C to +0.08%/°C temperature coefficient. It provides precision voltage regulation in automotive and industrial power supply rails, ESD protection clamping, and reference voltage generation.
For engineers reviewing the DFLZ9V1-7 datasheet, DFLZ9V1-7 pinout, DFLZ9V1-7 application, or DFLZ9V1-7 equivalent, key selection criteria include Zener voltage tolerance (±6.6%), thermal resistance junction-to-soldering point (9°C/W), reverse leakage (5µA @ 7.3V), and JEDEC-qualified reliability for high-reliability PCB designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and temperature shifts. Its low 1Ω typical Zener impedance ensures minimal voltage deviation under dynamic current loads, while the ±0.03%/°C to +0.08%/°C temperature coefficient enables predictable drift behavior in ambient ranges from –55°C to +150°C.
The PowerDI123 package delivers 1.0W power dissipation on FR-4 PCBs with 2 oz. copper and 1"×1" pad layout, supported by a thermal resistance of 110°C/W (junction-to-ambient) and 9°C/W (junction-to-soldering point). Cathode band marking identifies polarity for unambiguous board-level orientation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1V nominal at IZT = 50mA; range 8.5–9.6V ensures ±6.6% tolerance for stable reference accuracy |
| Zener Impedance (ZZT) | 1Ω typical / 4Ω max at 50mA - enables tight regulation under transient load changes |
| Reverse Leakage (IR) | 5µA max at VR = 7.3V - guarantees low standby power loss in voltage-clamp circuits |
| Power Dissipation (PD) | 1.0W on standard FR-4 PCB - supports robust overvoltage protection without heatsinking |
| Thermal Resistance (RθJS) | 9°C/W junction-to-soldering point - allows direct thermal path to PCB copper for sustained operation |
| Temperature Coefficient | +0.03%/°C to +0.08%/°C - positive drift enables predictable compensation in multi-Zener networks |
| Operating Temperature | –55°C to +150°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: PowerDI123 - surface-mount, single-ended, cathode-band-marked plastic package with matte tin–annealed copper leadframe; UL 94V-0 rated, halogen/antimony-free "Green" compound; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; forms regulated output reference when cathode is biased above anode |
| Cathode | Reverse-bias input / Zener breakdown terminal | Marked with band; accepts input voltage >9.1V to initiate controlled breakdown and clamp/regulate |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating on FR-4 | Enables standalone overvoltage protection without external heat sinking in space-constrained layouts |
| JEDEC-qualified reliability | Validated per AEC-Q standards for mission-critical automotive and industrial applications |
| Cathode band polarity marking | Eliminates assembly errors during automated placement and visual inspection |
| RoHS-compliant & "Green" | Meets EU RoHS 3 (2015/863/EU) with <900ppm Br, <900ppm Cl, <1000ppm Sb - compliant for global OEM shipments |
| Low RθJS = 9°C/W | Maximizes thermal coupling to PCB copper, enabling continuous 1W operation at TA ≤ +125°C |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamp transients on 12V battery-supplied microcontroller I/O lines during load dump events. IC Role / Device Role / Timing Role: Zener-based shunt regulator providing fast-response overvoltage protection. Use Value: Withstands 120V/50ms load dump pulses while limiting voltage to ≤10.5V at the protected IC input. |
Use Scenario: Protect 4–20mA current loop receiver inputs from field-wiring surge and ESD. IC Role / Device Role / Timing Role: Precision clamping element placed before op-amp input stage. Use Value: 9.1V regulation and 5µA leakage ensure signal integrity and <100nA offset error contribution. |
| DC-DC Converter Feedback Reference | Medical Sensor Bias Voltage Generator |
Use Scenario: Provide stable reference for optocoupler feedback in isolated flyback converters. IC Role / Device Role / Timing Role: Secondary-side Zener reference setting output voltage via TL431 comparator threshold. Use Value: ±6.6% VZ tolerance and +0.05%/°C TC enable ±2% output regulation over –40°C to +85°C. |
Use Scenario: Generate low-noise 9.1V bias for photodiode transimpedance amplifiers in pulse oximeters. IC Role / Device Role / Timing Role: Low-impedance DC reference source decoupled from switching noise. Use Value: 1Ω ZZT minimizes AC impedance, reducing 1/f noise injection into sensitive analog front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 (Diodes Inc.) | 300mW SOT-23 package; 9.1V ±5%, ZZT = 15Ω typical; RθJA = 350°C/W | Limited to low-power signal-level clamping; unsuitable for >100mA sustained regulation | Select when board space is critical and power <300mW; avoid for power rail stabilization |
| MMSZ5240B (ON Semiconductor) | 500mW SOD-123; 10V nominal (not 9.1V); ZZT = 17Ω; TC = +0.085%/°C | Requires circuit redesign for 10V vs. 9.1V; higher impedance reduces regulation fidelity | Choose only if 10V reference is acceptable and thermal margin permits 500mW derating |
Compared with BZX84-C9V1 and MMSZ5240B, DFLZ9V1-7 delivers 3.3× higher power handling, 15× lower Zener impedance, and superior thermal coupling-making it the sole choice for 1W-class automotive and industrial voltage regulation where stability under load and temperature is non-negotiable.
Availability
DFLZ9V1-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controller (PLC) input protection, and medical sensor biasing requiring stable component supply and long-term lifecycle continuity.
Supply support for DFLZ9V1-7 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 consumer markets with ISO/TS 16949 and ISO 14001 certifications.
The DFLZ series targets high-power, high-stability Zener regulation in harsh environments, designed specifically for automotive-grade voltage reference and clamping where JEDEC qualification and thermal robustness are mandatory.
FAQ
What is the maximum continuous reverse current the DFLZ9V1-7 can handle at 9.1V?
The DFLZ9V1-7 is not rated for continuous reverse current at its Zener voltage; instead, it is characterized at IZT = 50mA for specification purposes. Its 1.0W power rating implies a maximum steady-state reverse current of approximately 110mA at 9.1V (P = V × I), but derating per the power derating curve is required above +25°C ambient.
Does DFLZ9V1-7 support automotive AEC-Q200 qualification?
No - DFLZ9V1-7 is qualified to JEDEC standards referenced in AEC-Q for high reliability, but the automotive-compliant variant is DFLZ9V1Q (separate datasheet DS30464Q). The "Q" suffix denotes full AEC-Q200 stress testing including temperature cycling, humidity bias, and vibration.
Can DFLZ9V1-7 be used in parallel for higher power handling?
Parallel operation is not recommended due to mismatch in Zener voltage and temperature coefficient between units, which causes current imbalance and potential thermal runaway. For >1W requirements, use a single higher-rated device or active regulation instead.
What is the significance of the "-7" suffix in DFLZ9V1-7?
The "-7" denotes tape-and-reel packaging: 3,000 units per reel in PowerDI123 package. It has no electrical or functional impact - DFLZ9V1-7 and DFLZ9V1-13 share identical die and specifications; only packaging quantity (3k vs. 10k) differs.
DFLZ9V1-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 5 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
DFLZ9V1-7 FAQ
1.How can I place an order for DFLZ9V1-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ9V1-7 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 DFLZ9V1-7 reliable?
The price and inventory of DFLZ9V1-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ9V1-7 is usually 5 days.
3.What payment methods are accepted for DFLZ9V1-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ9V1-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ9V1-7?
DFLZ9V1-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ9V1-7 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 DFLZ9V1-7?
For technical support, including DFLZ9V1-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ9V1-7 requirements.
6.How does Aetrix verify that DFLZ9V1-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ9V1-7 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 DFLZ9V1-7 meets industry standards.
7.What is the process for return or replacement of DFLZ9V1-7?
All DFLZ9V1-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ9V1-7, 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 DFLZ9V1-7 part is unused and in its original packaging.
Return procedure for DFLZ9V1-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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