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Diodes Incorporated DDZX5V1BQ-7
- Part No.:
- DDZX5V1BQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDZX5V1BQ-7.pdf
- Description:
- DIODE ZENER 5.1V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:207
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Product details
Overview
DDZX5V1BQ-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal 5.1 V zener voltage (4.94–5.20 V), 300 mW power dissipation on FR-4 PCB, 17 Ω zener impedance at 20 mA, 1 μA reverse leakage at 1.5 V, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the DDZX5V1BQ-7 datasheet, DDZX5V1BQ-7 pinout, DDZX5V1BQ-7 application, or DDZX5V1BQ-7 equivalent, this part serves as a stable voltage reference in low-power regulation, overvoltage protection, and biasing circuits where tight VZ tolerance and low leakage are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a precise DC reference voltage under controlled current conditions. Its sharp breakdown characteristics and low dynamic impedance (17 Ω @ 20 mA) ensure minimal voltage variation across load and line changes.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports automated SMT assembly. The SOT23 package enables high-density layout while maintaining thermal performance up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.94–5.20 V at IZT = 20 mA - defines stable reference range for precision biasing |
| Zener Impedance (ZZT) | 17 Ω @ 20 mA - ensures <±20 mV output shift per ±340 μA current change |
| Power Dissipation (PD) | 300 mW on FR-4 PCB - sets max continuous Zener current to ~59 mA at 5.1 V |
| Reverse Leakage (IR) | 1 μA @ VR = 1.5 V - minimizes error current in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 417 °C/W - limits junction rise to ~125°C at full PD ambient of 25°C |
| Operating Temperature | −65 to +150 °C - supports under-hood automotive and industrial environments |
Pinout & Package
SOT23 plastic surface-mount package with 3 terminals; anode (pin 1), cathode (pin 2), and anode (pin 3) - dual-anode configuration enabling common-cathode dual-Zener or series-connected operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Primary anode connection; used with Pin 2 for standard Zener operation |
| Pin 2 | Cathode | Common cathode terminal; connects to regulated node or reference rail |
| Pin 3 | Anode | Secondary anode; allows parallel or series Zener configurations without external wiring |
Key Features
| Feature | Design Value |
|---|---|
| Very tight VZ tolerance | ±2.5% (4.94–5.20 V) - reduces calibration overhead in voltage-reference designs |
| Low leakage current | 1 μA @ 1.5 V - preserves accuracy in high-source-impedance feedback networks |
| AEC-Q101 qualification | Automotive-grade reliability - validated for temperature cycling, HAST, and mechanical shock |
| Lead-free & halogen-free | RoHS 2 and "Green" compliant - satisfies Tier-1 automotive supply chain requirements |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 5.1 V reference for microcontroller ADC inputs and CAN transceiver bias rails in BCMs. IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp protecting analog front-end circuitry. Use Value: Maintains ADC accuracy across −40°C to +125°C ambient with <±10 mV drift due to tight VZ tolerance and low tempco. | Use Scenario: Biasing bridge amplifiers and setting thresholds in 4–20 mA transmitter loop-powered sensors. IC Role / Device Role / Timing Role: Low-drift DC reference source and fault-detection clamp in analog signal chains. Use Value: Enables <0.1% full-scale error budget by limiting reference drift and leakage-induced offset. |
| Portable Medical Instrumentation | Smart Energy Meter Reference |
Use Scenario: Supplying excitation voltage for precision thermistor and RTD measurement circuits in handheld diagnostics. IC Role / Device Role / Timing Role: Low-noise, low-leakage voltage reference for ratiometric sensor interfaces. Use Value: Delivers sub-10 ppm/°C effective tempco via matched thermal tracking with op-amp input stages. | Use Scenario: Generating accurate 5.1 V reference for metrology-grade ADCs and real-time clock backup in Class 0.2 meters. IC Role / Device Role / Timing Role: Primary voltage reference for energy measurement ICs requiring long-term stability. Use Value: Supports 10-year calibration retention with <0.5% VZ shift under lifetime thermal cycling per AEC-Q101. |
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-C5V1LT1G | VZ = 4.8–5.4 V (±6%), ZZT = 60 Ω @ 5 mA - looser tolerance, higher impedance | General-purpose regulation only; not AEC-Q101 qualified | Select when cost sensitivity outweighs precision and automotive compliance needs |
| MMSZ5231BT1G | VZ = 4.76–5.24 V (±5%), ZZT = 17 Ω @ 20 mA - same impedance but wider VZ band | Lacks AEC-Q101 qualification and PPAP capability | Acceptable for industrial non-automotive use where tighter VZ control is not required |
Compared with BZX84-C5V1LT1G and MMSZ5231BT1G, DDZX5V1BQ-7 delivers superior voltage accuracy and automotive qualification-critical for safety-relevant reference functions-while maintaining identical SOT23 footprint and thermal performance.
Availability
DDZX5V1BQ-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, portable medical diagnostics, and smart energy metering requiring stable component supply and long-term calibration integrity.
Supply support for DDZX5V1BQ-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 computing markets.
The DDZX series targets precision voltage reference applications demanding tight VZ tolerance, low leakage, and AEC-Q101 compliance-designed specifically for automotive and mission-critical industrial systems.
FAQ
What is the maximum continuous Zener current for DDZX5V1BQ-7 at 25°C ambient?
At 25°C ambient on FR-4 PCB with recommended pad layout, the maximum continuous Zener current is approximately 59 mA, calculated from PD = 300 mW and VZ ≈ 5.1 V. Derating is required above 25°C per RθJA = 417 °C/W, reaching zero allowable current at ~100°C ambient.
Does DDZX5V1BQ-7 support bidirectional operation like a TVS diode?
No. DDZX5V1BQ-7 is a unidirectional Zener diode optimized for reverse-bias voltage regulation. It lacks the symmetric breakdown and high peak pulse power handling of TVS devices. Forward conduction is limited to 0.9 V @ 10 mA and is not intended for surge suppression.
How does the dual-anode SOT23 configuration benefit circuit design?
The dual-anode (pins 1 and 3) with shared cathode (pin 2) enables two independent Zener paths in one package: either as redundant references, series-connected Zeners for higher voltage, or common-cathode dual-rail clamping-reducing board space versus two discrete SOT23 Zeners.
Is DDZX5V1BQ-7 suitable for use in a shunt regulator with variable load current?
Yes, when paired with a series resistor that maintains IZ ≥ 1 mA (minimum knee current) across the full load range. Its 17 Ω ZZT ensures <±17 mV output variation per ±1 mA load change, making it appropriate for low-current (<10 mA) shunt regulation where precision matters more than efficiency.
DDZX5V1BQ-7 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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDZX5V1BQ-7 FAQ
1.How can I place an order for DDZX5V1BQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDZX5V1BQ-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 DDZX5V1BQ-7 reliable?
The price and inventory of DDZX5V1BQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDZX5V1BQ-7 is usually 5 days.
3.What payment methods are accepted for DDZX5V1BQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDZX5V1BQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDZX5V1BQ-7?
DDZX5V1BQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDZX5V1BQ-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 DDZX5V1BQ-7?
For technical support, including DDZX5V1BQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDZX5V1BQ-7 requirements.
6.How does Aetrix verify that DDZX5V1BQ-7 is sourced from the original manufacturer or authorized distributors?
All DDZX5V1BQ-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 DDZX5V1BQ-7 meets industry standards.
7.What is the process for return or replacement of DDZX5V1BQ-7?
All DDZX5V1BQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDZX5V1BQ-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 DDZX5V1BQ-7 part is unused and in its original packaging.
Return procedure for DDZX5V1BQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDZX5V1BQ-7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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