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Diodes Incorporated DDZX30D-13
- Part No.:
- DDZX30D-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDZX30D-13.pdf
- Description:
- DIODE ZENER 30V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:6,851
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Product details
Overview
DDZX30D-13 from Diodes Incorporated is a surface-mount precision Zener diode in SOT23 package, rated for 30.51 V maximum zener voltage at 5 mA test current, with 55 Ω typical zener impedance at 5 mA and 250 Ω at knee current, operating across –65°C to +150°C. It delivers stable voltage reference in power supply regulation and overvoltage protection circuits on FR-4 PCBs.
For engineers reviewing the DDZX30D-13 datasheet, DDZX30D-13 pinout, DDZX30D-13 application, or DDZX30D-13 equivalent, this part supports high-reliability industrial and automotive designs requiring tight VZ tolerance (±2.5% at 30 V), low leakage (<0.05 µA at 23 V), and AEC-Q101 qualification.
Technical Context
This Zener diode operates in reverse breakdown mode with sharp knee characteristics, enabling precise voltage clamping and reference generation. Its 55 Ω dynamic impedance at IZT = 5 mA ensures minimal output variation under load changes, while the 250 Ω impedance at IZK = 0.5 mA maintains stability near threshold conduction.
The device exhibits a temperature coefficient of approximately +0.08 %/°C in the 30–30.5 V range (per Fig. 18), supporting predictable drift behavior in thermal-varying environments. Its 300 mW power dissipation rating is validated on standard FR-4 PCB with specified pad layout, not on thermally enhanced substrates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.02–30.51 V at IZT = 5 mA - defines nominal regulation point with ±2.5% tolerance for precision reference use. |
| Zener Impedance (ZZT) | 55 Ω at IZT = 5 mA - limits output voltage shift under dynamic load current changes. |
| Knee Impedance (ZZK) | 250 Ω at IZK = 0.5 mA - determines minimum usable current for stable regulation onset. |
| Reverse Leakage (IR) | ≤0.05 µA at VR = 23 V - ensures negligible standby current in high-impedance bias networks. |
| Power Dissipation (PD) | 300 mW on FR-4 PCB - sets maximum continuous power handling without derating below 25°C ambient. |
| Operating Temperature | –65°C to +150°C - enables deployment in under-hood automotive and industrial control environments. |
| AEC-Q101 Qualified | Yes - confirms reliability for automotive electronics per stress-test requirements (HTOL, TC, HAST). |
Pinout & Package
Package: SOT23 - surface-mount plastic case with matte tin annealed terminals, UL 94V-0 rated, 0.008 g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground path | Connected to system ground or lower-potential node when used in shunt regulation configuration. |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input voltage source via series resistor; provides stable 30 V reference at this node. |
| No-Connect (Pin 3) | Internal die attach / mechanical support only | Not electrically bonded; must remain unconnected in PCB layout to avoid parasitic coupling or thermal stress. |
Key Features
| Feature | Design Value |
|---|---|
| Very sharp breakdown knee | Enables reliable low-current regulation starting at 0.5 mA, reducing minimum operating current in battery-powered systems. |
| Tight VZ tolerance (±2.5%) | Eliminates need for post-production trimming in voltage reference circuits, lowering calibration cost and time. |
| 300 mW dissipation on FR-4 | Supports direct integration into standard PCB layouts without heatsinking or thermal vias in most 5–10 mA applications. |
| AEC-Q101 qualified | Validates long-term reliability under automotive thermal cycling and humidity exposure, suitable for engine control modules. |
| Halogen- and antimony-free "Green" construction | Meets IPC-1752A material declaration requirements and EU ELV Directive for end-of-life vehicle compliance. |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 30 V setpoint to error amplifier input. Use Value: Maintains ±0.75% output regulation across line/load/temperature with no external trimming required. |
Use Scenario: Generating stable bias for sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Precision reference source for analog-to-digital converter reference buffer. Use Value: Enables <1 LSB offset drift over –40°C to +125°C due to matched TC and low leakage. |
| Overvoltage Protection Clamp | Programmable Threshold Detector |
Use Scenario: Protecting microcontroller GPIO pins against transient surges in factory automation interfaces. IC Role / Device Role / Timing Role: Fast-acting crowbar element triggered above 30.5 V threshold. Use Value: Limits clamp voltage to ≤31.2 V at 100 mA surge, preventing latch-up in 3.3 V logic inputs. |
Use Scenario: Setting trip point for battery pack overvoltage detection in energy storage systems. IC Role / Device Role / Timing Role: Zener-based comparator reference in discrete window detector circuit. Use Value: Provides repeatable 30.25 V threshold with <±0.1 V hysteresis using standard resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C30LT1G | Zener voltage 28.5–31.5 V (±5%), ZZT = 90 Ω at 5 mA, no AEC-Q101 qualification | Acceptable for commercial-grade power supplies but unsuitable for automotive under-hood use | Select when cost is primary constraint and AEC-Q101 is not required; verify thermal margin at full load. |
| MMSZ5261ET1G | Zener voltage 28.5–31.5 V (±5%), PD = 500 mW on FR-4, ZZT = 70 Ω at 20 mA | Higher power rating allows higher current operation but looser VZ tolerance reduces reference accuracy | Prefer for higher-current clamping where 300 mW is insufficient; accept ±5% VZ variation in non-critical sensing. |
Compared with BZX84-C30LT1G and MMSZ5261ET1G, DDZX30D-13 offers tighter VZ tolerance and automotive qualification at the expense of slightly higher ZZT, making it optimal for precision reference and safety-critical voltage monitoring.
Availability
DDZX30D-13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU voltage reference, and overvoltage protection clamp applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DDZX30D-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, specializing in high-reliability components for automotive, industrial, and computing markets.
DDZX30D-13 belongs to the DDZX precision Zener diode product line, engineered for stable voltage reference and clamping in space-constrained, thermally demanding applications where tight tolerance and AEC-Q101 compliance are essential.
FAQ
What is the maximum continuous reverse voltage that can be applied before breakdown?
The DDZX30D-13 has a guaranteed zener voltage range of 29.02 V to 30.51 V at 5 mA test current. Breakdown begins within this band; applying ≥30.51 V continuously at rated current ensures stable regulation. Exceeding 30.51 V without current limiting risks thermal runaway.
How does the 300 mW power rating translate to practical PCB layout?
The 300 mW rating assumes mounting on standard FR-4 with Diodes Incorporated's recommended SOT23 pad layout (2.0 mm × 0.9 mm land pattern, 0.8 mm solder mask opening). No thermal vias or copper pours are required for operation up to 10 mA at 25°C ambient.
Is the SOT23 pinout compatible with other Zener diodes in the same package?
Yes - DDZX30D-13 follows standard SOT23 pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC. This matches industry-standard Zener diodes including BZX84 and MMSZ series, enabling drop-in replacement in existing footprints.
Does the AEC-Q101 qualification cover the full temperature range?
Yes - AEC-Q101 qualification includes testing across –40°C to +125°C operating range, plus extended stress tests (HTOL, temperature cycling, HAST) performed at elevated temperatures. The full –65°C to +150°C specification remains valid, with qualification confirming reliability within automotive ambient limits.
DDZX30D-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):
- 30 V
- Tolerance:
- ±3%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23 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
DDZX30D-13 FAQ
1.How can I place an order for DDZX30D-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZX30D-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 DDZX30D-13 reliable?
The price and inventory of DDZX30D-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZX30D-13 is usually 5 days.
3.What payment methods are accepted for DDZX30D-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZX30D-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZX30D-13?
DDZX30D-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZX30D-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 DDZX30D-13?
For technical support, including DDZX30D-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZX30D-13 requirements.
6.How does Aetrix verify that DDZX30D-13 is sourced from the original manufacturer or authorized distributors?
All DDZX30D-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 DDZX30D-13 meets industry standards.
7.What is the process for return or replacement of DDZX30D-13?
All DDZX30D-13 units undergo pre-shipment inspection (PSI). If there is an issue with DDZX30D-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 DDZX30D-13 part is unused and in its original packaging.
Return procedure for DDZX30D-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZX30D-13 Tags
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