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Diodes Incorporated DDZ36-7
- Part No.:
- DDZ36-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
DDZ36-7.pdf
- Description:
- DIODE ZENER 36V 470MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
DDZ36-7 from Diodes Incorporated is a surface-mount precision Zener diode designed for voltage regulation and reference applications in power supply feedback loops, analog sensing circuits, and overvoltage protection. It delivers a nominal Zener voltage of 36 V (min 35.36 V, max 37.19 V) at 5 mA test current, with 85 Ω maximum Zener impedance at 1 kHz, 0.05 µA maximum reverse leakage at 30 V, and operates across –65 °C to +150 °C.
For engineers reviewing the DDZ36-7 datasheet, DDZ36-7 pinout, DDZ36-7 application, or DDZ36-7 equivalent, this device is selected for stable low-power voltage reference design where tight VZ tolerance, low temperature coefficient, and SOD123 package compatibility with automated assembly are critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified knee current (IZK) of 0.5 mA and maintains regulation across a 5 mA nominal test current. Its thermal resistance (RθJA) is 425 °C/W under minimal pad layout conditions and 266 °C/W with enhanced copper area, directly impacting power derating above +25 °C ambient.
The device exhibits a positive temperature coefficient (~0.08 %/°C at 36 V, per Fig. 19), enabling predictable drift behavior in temperature-sensitive references. Its total capacitance is <2 pF at 1 MHz and VR = 1 V, supporting high-frequency stability in filtering and clamping roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.36 V to 37.19 V at IZT = 5 mA - defines regulation window for precision reference use |
| Zener Impedance (ZZT) | 85 Ω max at f = 1 kHz - limits AC ripple rejection in feedback paths |
| Reverse Leakage (IR) | 0.05 µA max at VR = 30 V - ensures minimal error current in high-impedance bias networks |
| Power Dissipation (PD) | 294 mW at TA = +25 °C with minimal pad layout - sets absolute DC power limit before thermal derating |
| Operating Temperature | –65 °C to +150 °C - supports industrial and automotive under-hood environments |
| Package | SOD123 - 2-pin surface-mount outline compatible with standard pick-and-place and reflow profiles |
| RoHS Compliance | Fully lead-free, halogen- and antimony-free "Green" device - meets EU Directive 2015/863/EU |
Pinout & Package
DDZ36-7 uses the SOD123 package: a 2-terminal, cathode-banded, surface-mount plastic case measuring 2.65 mm × 1.55 mm × 1.05 mm (L × W × H), with matte tin–annealed Alloy 42 leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied to cathode for regulation |
| Cathode (banded end) | Zener breakdown terminal / regulated output node | Connected to input voltage source; provides stable VZ referenced to anode when reverse biased ≥ VZ |
Key Features
| Feature | Design Value |
|---|---|
| Tight Zener voltage tolerance | ±2.5% at 36 V (35.36–37.19 V range) enables accurate voltage setting without trimming |
| Low Zener impedance | 85 Ω max improves load regulation and reduces output variation under dynamic current changes |
| Ultra-low reverse leakage | 0.05 µA at 30 V minimizes error in high-impedance reference dividers and sensor biasing |
| SOD123 packaging | Compact, tape-and-reel compatible footprint supports high-density PCB layouts and automated manufacturing |
| Extended temperature range | –65 °C to +150 °C operation allows deployment in harsh environments including engine control units and industrial PLCs |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides precise voltage reference for optocoupler-based feedback in isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener voltage sets error amplifier threshold; replaces TL431 in cost-sensitive designs requiring fixed 36 V regulation. Use Value: Tight VZ tolerance ensures ±1% output voltage accuracy across line/load/temperature variations. |
Use Scenario: Supplies stable excitation voltage to resistive temperature detectors (RTDs) in process control transmitters. IC Role / Device Role / Timing Role: Functions as a low-drift, low-noise voltage reference in ratiometric measurement circuits. Use Value: Low 0.05 µA leakage avoids loading errors in high-impedance bridge configurations. |
| Overvoltage Clamp Protection | Automotive ECU Voltage Monitor |
Use Scenario: Clamps transient surges on 24 V rail inputs to protect downstream logic and ADC inputs. IC Role / Device Role / Timing Role: Acts as shunt protector triggered at 36 V, diverting excess energy to ground during load-dump events. Use Value: 294 mW power rating sustains short-duration transients without thermal runaway. |
Use Scenario: Monitors battery-supplied 36 V subsystems (e.g., HVAC actuators) in AEC-Q101–qualified vehicle ECUs. IC Role / Device Role / Timing Role: Serves as a ruggedized voltage threshold detector in discrete comparator-based monitoring circuits. Use Value: Extended –65 °C to +150 °C range ensures reliability in under-hood temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36 (ON Semiconductor) | Same 36 V nominal VZ, but wider tolerance (±5%), higher ZZT (100 Ω), SOT-23 package | Less suitable for precision regulation; better for general-purpose clamping due to higher surge capability | Select when board space permits SOT-23 and ±5% tolerance is acceptable |
| MMSZ5245B (Vishay) | 36 V nominal VZ, ±5% tolerance, 100 Ω ZZT, SOD-123 package, but only rated to +150 °C (no extended low-temp spec) | Lacks guaranteed operation below –55 °C; not qualified for automotive under-hood use | Prefer for commercial-grade applications where full –65 °C rating is unnecessary |
Compared with BZX84-C36 and MMSZ5245B, DDZ36-7 offers tighter voltage tolerance, lower impedance, and guaranteed operation down to –65 °C-making it optimal for high-accuracy, wide-temperature industrial and automotive voltage reference designs.
Availability
DDZ36-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and automotive electronic control units requiring stable component supply and long-term manufacturability.
Supply support for DDZ36-7 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.
The DDZ series targets precision voltage reference and regulation in cost-sensitive, high-volume applications-emphasizing tight VZ tolerance, low leakage, and robust SMD packaging for automated assembly.
FAQ
What is the minimum recommended cathode-anode voltage for stable Zener operation?
DDZ36-7 requires a reverse bias ≥35.36 V to enter full breakdown regulation. Below this, current remains sub-microampere; stable regulation begins at ~36 V with ≥0.5 mA through the device, per its IZK specification and Fig. 8's breakdown curve.
Can DDZ36-7 replace a TL431 in adjustable shunt regulator circuits?
No-it is a fixed-voltage Zener, not an adjustable shunt regulator. It lacks internal op-amp, reference, and feedback terminals. It can replace TL431 only in fixed 36 V applications where external resistor networks are omitted and regulation tolerance requirements align with ±2.5%.
Is DDZ36-7 qualified for automotive use?
No-the "-7" suffix denotes commercial qualification. Automotive-grade equivalents are designated "DDZ36Q-7", which are AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949 certified facilities per DS30407 Rev. 21.
How does thermal derating affect maximum power dissipation at 100 °C ambient?
Per Figure 1 (Note 8), at TA = 100 °C, power dissipation must be reduced to ~0.22 W. This is calculated from the 294 mW rating at 25 °C and linear derating slope of 1.17 mW/°C above 75 °C, ensuring junction temperature stays within –65 °C to +150 °C limits.
DDZ36-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±2.5%
- Power - Max:
- 470 mW
- Impedance (Max) (Zzt):
- 85 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
DDZ36-7 FAQ
1.How can I place an order for DDZ36-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZ36-7 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 DDZ36-7 reliable?
The price and inventory of DDZ36-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZ36-7 is usually 5 days.
3.What payment methods are accepted for DDZ36-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZ36-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZ36-7?
DDZ36-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZ36-7 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 DDZ36-7?
For technical support, including DDZ36-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZ36-7 requirements.
6.How does Aetrix verify that DDZ36-7 is sourced from the original manufacturer or authorized distributors?
All DDZ36-7 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 DDZ36-7 meets industry standards.
7.What is the process for return or replacement of DDZ36-7?
All DDZ36-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZ36-7, 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 DDZ36-7 part is unused and in its original packaging.
Return procedure for DDZ36-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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