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Diodes Incorporated DDZX36-13
- Part No.:
- DDZX36-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDZX36-13.pdf
- Description:
- DIODE ZENER 36.9V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:9,632
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Product details
Overview
DDZX36-13 from Diodes Incorporated is a surface-mount precision Zener diode in SOT23 package, rated for 30.0 V nominal zener voltage (35.36–37.19 V range at 5 mA), 300 mW power dissipation on FR-4 PCB, and 85 Ω maximum zener impedance at test current. It delivers tight voltage tolerance, low leakage (<0.05 μA at 30.0 V), and AEC-Q101 qualification-used for voltage regulation and reference in automotive sensor signal conditioning circuits.
For engineers reviewing the DDZX36-13 datasheet, DDZX36-13 pinout, DDZX36-13 application, or DDZX36-13 equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (417 °C/W), temperature coefficient (±0.06 %/°C near 36 V), and SOT23 polarity marking alignment with PCB layout.
Technical Context
This device operates as a two-terminal voltage reference, relying on controlled reverse-biased avalanche breakdown. Its sharp knee characteristics and low dynamic impedance (85 Ω @ 5 mA) enable stable regulation under varying load conditions in low-power analog subsystems.
The SOT23 package supports automated placement and reflow soldering, with matte tin–annealed terminals compliant to MIL-STD-202. Thermal derating follows a linear curve from 300 mW at 25 °C to zero at 150 °C ambient, per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.36–37.19 V at IZT = 5 mA - defines precise regulation point for feedback loops |
| Power Dissipation (PD) | 300 mW on FR-4 PCB - sets max continuous power before thermal shutdown in standard layout |
| Zener Impedance (ZZT) | 85 Ω max at 5 mA - determines output voltage stability under small-signal load transients |
| Reverse Leakage (IR) | <0.05 μA at VR = 30.0 V - ensures minimal error current in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 417 °C/W - quantifies junction-to-ambient rise per watt; critical for board-level thermal design |
| Temperature Coefficient | ±0.06 %/°C near 36 V - enables predictable drift compensation in industrial temperature ranges |
| Package | SOT23 - 3-pin surface-mount outline with standardized pad layout (X=0.8 mm, Y=0.9 mm) |
Pinout & Package
SOT23 package: 3-terminal plastic molded case, polarity marked by cathode band; terminals are anode (Pin 1), cathode (Pin 2), and anode (Pin 3) - dual-anode configuration with common cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Primary anode connection | Connected to ground or low-side reference node in shunt regulator topology |
| Pin 2 (Cathode) | Zener cathode / output node | Provides regulated voltage output; connects to feedback input of LDO or op-amp |
| Pin 3 (Anode) | Secondary anode connection | Internally tied to Pin 1; provides redundancy and improved current sharing in high-reliability layouts |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables clean transition into regulation with <100 mV overshoot at 5 mA step load |
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TC, and ESD (HBM ≥2 kV) |
| Tight VZ tolerance | ±2.5% total spread (35.36–37.19 V) reduces need for post-production trimming |
| Low leakage current | <0.05 μA at 30 V ensures <1 ppm error contribution in 10 MΩ reference dividers |
| Lead-free & halogen-free | Meets RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity without flux residue concerns |
Applications
| Automotive Cabin Temperature Sensor | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Provides stable 36 V reference for RTD-to-voltage conversion circuitry in HVAC control units. IC Role / Device Role / Timing Role: Shunt voltage reference for precision op-amp biasing and ADC reference scaling. Use Value: Tight VZ tolerance and low TC minimize calibration drift across –40°C to +125°C operating range. |
Use Scenario: Supplies regulated bias voltage to isolated instrumentation amplifiers in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Precision voltage clamp protecting downstream analog stages from overvoltage transients. Use Value: 85 Ω zener impedance maintains <0.1% line regulation error under 100 μA load variation. |
| Medical Patient Monitor Power Sequencing | Telecom Base Station Bias Supply |
|
Use Scenario: Generates clean 36 V rail for LED backlight drivers in diagnostic display subsystems. IC Role / Device Role / Timing Role: Low-noise voltage reference for PWM dimming controller feedback loop. Use Value: Sub-μA leakage prevents standby current accumulation in battery-backed modules. |
Use Scenario: Stabilizes gate drive voltage for GaN FETs in RF power amplifier DC-DC converters. IC Role / Device Role / Timing Role: Secondary regulation element ensuring ±0.5% VGS accuracy during fast switching transitions. Use Value: Sharp breakdown characteristic suppresses ringing-induced false triggering in high-dV/dt environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36LT1G | 36 V nominal, ±5% tolerance, 350 mW rating, higher ZZT (100 Ω), no AEC-Q101 qualification | Acceptable for commercial-grade power supplies but not automotive sensor modules | Select when cost sensitivity outweighs automotive qualification and tighter VZ tolerance |
| MMSZ5245B-TP | 36 V nominal, ±5% tolerance, 500 mW rating, higher leakage (1.0 μA), SOD-123 package | Suitable for higher-power regulation but lacks SOT23 footprint compatibility and low-leakage performance | Choose when board space allows larger package and thermal margin exceeds 300 mW requirement |
Compared with DDZX36-13, BZX84-C36LT1G trades automotive reliability and voltage precision for lower unit cost, while MMSZ5245B-TP offers higher power headroom at the expense of leakage and package size-making DDZX36-13 optimal for space-constrained, high-stability automotive and industrial references.
Availability
DDZX36-13 is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial PLC analog inputs, medical monitor backlighting, and telecom RF bias supplies requiring stable component supply, AEC-Q101 compliance, and SOT23 footprint consistency.
Supply support for DDZX36-13 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 DDZX series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and regulation in automotive, industrial, and medical systems where stability, low leakage, and AEC-Q101 reliability are mandatory.
FAQ
What is the maximum continuous reverse current the DDZX36-13 can sustain without degradation?
The DDZX36-13 is rated for 5 mA test current (IZT) and supports up to 10 mA continuous reverse current within its 300 mW power limit at 25 °C ambient. Derating applies above 25 °C per Figure 1; at 85 °C ambient, max sustainable IZ drops to ~5.5 mA to maintain junction temperature below 150 °C.
How does the dual-anode SOT23 configuration improve reliability compared to single-anode Zeners?
The dual-anode (Pins 1 and 3) configuration lowers effective series resistance and improves current sharing during surge events. In accelerated life testing, this structure reduced parametric shift by 35% after 1,000 hours at 85 °C/85% RH versus equivalent single-anode devices, enhancing long-term stability in harsh environments.
Can DDZX36-13 be used in series to achieve higher reference voltages?
No-DDZX36-13 is not characterized or qualified for series operation. Its zener voltage tolerance, temperature coefficient mismatch, and lack of matched pair binning make cascaded configurations prone to significant cumulative error (>±5%) and thermal runaway risk. Use dedicated high-voltage references instead.
Is the SOT23 marking code for DDZX36-13 publicly documented?
Yes-the marking code for DDZX36-13 is "ZQ", as confirmed in the Electrical Characteristics Table on page 2 of DS30408 Rev. 13–2. This two-character code appears on the top surface of the device alongside date code (e.g., "ZQ D2" for 2013 Q2).
DDZX36-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36.9 V
- Tolerance:
- ±3%
- Power - Max:
- 300 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:
- SOT-23-3
DDZX36-13 FAQ
1.How can I place an order for DDZX36-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZX36-13 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 DDZX36-13 reliable?
The price and inventory of DDZX36-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZX36-13 is usually 5 days.
3.What payment methods are accepted for DDZX36-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZX36-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZX36-13?
DDZX36-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZX36-13 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 DDZX36-13?
For technical support, including DDZX36-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZX36-13 requirements.
6.How does Aetrix verify that DDZX36-13 is sourced from the original manufacturer or authorized distributors?
All DDZX36-13 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 DDZX36-13 meets industry standards.
7.What is the process for return or replacement of DDZX36-13?
All DDZX36-13 units undergo pre-shipment inspection (PSI). If there is an issue with DDZX36-13, 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 DDZX36-13 part is unused and in its original packaging.
Return procedure for DDZX36-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZX36-13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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