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Diodes Incorporated DFLZ36-7
- Part No.:
- DFLZ36-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLZ36-7.pdf
- Description:
- DIODE ZENER 36V 1W POWERDI 123
- Quantity:
- Payment:
- Shipping:
Inventory:29,605
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Product details
Overview
DFLZ36-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, providing precise 36V nominal Zener voltage (±5.6% tolerance) at 10mA test current, with 40Ω maximum Zener impedance and 1µA maximum reverse leakage at 27V, used for overvoltage protection and voltage regulation in automotive and industrial power supplies.
For engineers reviewing the DFLZ36-7 datasheet, DFLZ36-7 pinout, DFLZ36-7 application, or DFLZ36-7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (9°C/W junction-to-solder), power derating above +25°C, and AEC-Q qualified reliability for harsh-environment designs.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp transient overvoltages and stabilize reference voltages. Its 1.0W power rating is validated on FR-4 PCB with 1"x1" copper pad, and thermal resistance junction-to-solder (RθJS) is 9°C/W - critical for thermal design in compact layouts.
The device features a cathode band marking, matte tin–annealed terminals solderable per MIL-STD-202, and meets JEDEC high-reliability standards. It exhibits a positive temperature coefficient (+0.06%/°C) and low total capacitance (~10pF at 1MHz), minimizing signal coupling in sensitive analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36V nominal, 34–38V range at IZT = 10mA - ensures stable clamping within ±5.6% across production lot |
| Power Dissipation (PD) | 1.0W at TA = +25°C on FR-4 PCB - defines maximum continuous steady-state energy handling |
| Zener Impedance (ZZT) | ≤40Ω max at IZT = 10mA - determines voltage regulation stiffness under load variation |
| Reverse Leakage (IR) | ≤1µA at VR = 27V - guarantees minimal quiescent current in standby or precision bias networks |
| Thermal Resistance (RθJS) | 9°C/W junction-to-solder - enables accurate thermal modeling from die to PCB copper thermal path |
| Temperature Coefficient | +0.06%/°C - quantifies Zener voltage drift with ambient temperature change |
| Operating Temperature | −55°C to +150°C - supports deployment in under-hood automotive and industrial control environments |
Pinout & Package
Package: PowerDI123 - surface-mount, single-ended, cathode-band-marked plastic package with exposed cathode tab for thermal conduction. Dimensions: 3.70mm × 1.78mm × 1.00mm (L × W × H); weight ≈ 0.01g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail; forms reference point for reverse-bias operation |
| Cathode | Zener breakdown terminal / heat sink interface | Marked with band; electrically and thermally connected to PCB copper pad for power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 1.0W power rating on standard FR-4 | Enables robust overvoltage clamping without heatsink in space-constrained PCBs |
| Cathode-tab thermal path (RθJS = 9°C/W) | Direct die-to-PCB conduction improves thermal margin vs. conventional SOD-123 |
| AEC-Q qualified reliability | Validated for automotive-grade durability including temperature cycling and humidity exposure |
| Halogen- and antimony-free "Green" compound | Meets EU RoHS 3 (2015/863/EU) and UL 94V-0 flammability requirements |
| Matte tin–annealed terminals | Ensures consistent solder wetting and intermetallic formation per MIL-STD-202 |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping 36V supply rail transients induced by load dump or relay switching in BCM power distribution units. IC Role / Device Role / Timing Role: Primary overvoltage protection element placed directly at power entry point before DC-DC converters. Use Value: Limits peak voltage to ≤38V with <1µA leakage, preserving downstream regulator input integrity during ISO 7637-2 pulse 5a events. |
Use Scenario: Protecting 24V/36V digital input channels of programmable logic controllers against field-wiring surges. IC Role / Device Role / Timing Role: Standoff Zener shunt in series with current-limiting resistor on isolated input stage. Use Value: Maintains ≤1µA off-state current while clamping >30V transients, ensuring noise immunity and long-term channel reliability. |
| Telecom Power Supply Reference | Medical Equipment Auxiliary Rail Regulator |
Use Scenario: Providing stable 36V reference for secondary-side feedback in telecom AC-DC adapters with wide-input ranges. IC Role / Device Role / Timing Role: Precision voltage reference source for optocoupler-based feedback loop compensation. Use Value: Delivers ±5.6% VZ tolerance and +0.06%/°C TC, enabling <±2% output regulation across −40°C to +85°C. |
Use Scenario: Regulating isolated auxiliary 36V rail powering analog front-end circuitry in diagnostic imaging systems. IC Role / Device Role / Timing Role: Low-leakage shunt regulator maintaining clean bias for low-noise amplifiers and ADC references. Use Value: Contributes <1µA leakage and <10pF capacitance, preventing signal distortion in sub-mV-level sensor interfaces. |
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-C36 | 0.3W rating, SOT-23 package, RθJA = 350°C/W, ±5% VZ tolerance | Limited to low-power signal rails; unsuitable for >100mA surge clamping | Select when board space is critical and power dissipation ≤300mW |
| MMSZ5245B | 0.5W rating, SOD-123, RθJA = 220°C/W, ±5% VZ, 100Ω ZZT | Higher impedance and lower power limit reduce regulation accuracy under load | Prefer for cost-sensitive consumer applications where thermal margin is ample |
Compared with BZX84-C36 and MMSZ5245B, DFLZ36-7 delivers 3.3× higher power handling, 39× lower thermal resistance, and 2.5× lower Zener impedance - making it uniquely suited for automotive and industrial 36V rail stabilization where thermal and electrical performance are co-constrained.
Availability
DFLZ36-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection circuits, and telecom power supply references requiring stable component supply with full traceability and AEC-Q compliance.
Supply support for DFLZ36-7 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, manufacturing, and sales operations across Asia, Europe, and North America.
DFLZ36-7 belongs to the PowerDI®123 Zener diode family engineered specifically for high-reliability voltage regulation and transient suppression in automotive and industrial power systems - emphasizing thermal efficiency, JEDEC qualification, and green material compliance.
FAQ
What is the maximum reverse voltage (VR) at which DFLZ36-7 guarantees ≤1µA leakage?
DFLZ36-7 guarantees ≤1µA reverse leakage current at VR = 27V, per Electrical Characteristics Table on page 2 of DS30464 Rev. 15-2. This is 75% of its nominal Zener voltage and serves as the rated standoff voltage for reliable blocking behavior prior to breakdown.
Can DFLZ36-7 be used in place of a 33V Zener for higher-voltage margin in a 36V system?
No - DFLZ36-7 is specified for 36V nominal operation with 34–38V range. Substituting a 33V Zener would reduce clamping headroom and risk premature conduction during normal 36V rail operation. Use DFLZ36-7 only where 36V regulation or clamping is explicitly required.
Is the PowerDI123 package lead (pin) compatible with SOD-123 footprints?
No - PowerDI123 has a larger outline (3.70mm × 1.78mm) and an exposed cathode tab requiring a dedicated thermal pad, unlike SOD-123 (3.7mm × 1.6mm without thermal tab). Pad layout must follow Diodes' recommended footprint (X1 = 2.40mm, X2 = 4.10mm, Y = 1.50mm) to ensure mechanical stability and thermal performance.
Does DFLZ36-7 meet AEC-Q200 stress testing requirements?
DFLZ36-7 is qualified to JEDEC standards referenced in AEC-Q200 for high-reliability applications, as stated in the Mechanical Data section of DS30464. However, the automotive-compliant variant is DFLZ36Q (separate datasheet DS30464Q); DFLZ36-7 is industrial-grade unless explicitly ordered as Q-suffix part.
DFLZ36-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 27 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
DFLZ36-7 FAQ
1.How can I place an order for DFLZ36-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLZ36-7 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 DFLZ36-7 reliable?
The price and inventory of DFLZ36-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLZ36-7 is usually 5 days.
3.What payment methods are accepted for DFLZ36-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLZ36-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLZ36-7?
DFLZ36-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLZ36-7 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 DFLZ36-7?
For technical support, including DFLZ36-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLZ36-7 requirements.
6.How does Aetrix verify that DFLZ36-7 is sourced from the original manufacturer or authorized distributors?
All DFLZ36-7 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 DFLZ36-7 meets industry standards.
7.What is the process for return or replacement of DFLZ36-7?
All DFLZ36-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLZ36-7, 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 DFLZ36-7 part is unused and in its original packaging.
Return procedure for DFLZ36-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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