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Diodes Incorporated UDZ3V6B-7
- Part No.:
- UDZ3V6B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
UDZ3V6B-7.pdf
- Description:
- DIODE ZENER 3.6V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,051
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Product details
Overview
UDZ3V6B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal 3.6 V breakdown voltage, ±3.5% tolerance (3.60–3.845 V), 200 mW power rating, and 100 Ω dynamic impedance at 5 mA test current. It is AEC-Q101 qualified and used for voltage regulation and reference in low-power analog circuits, such as sensor biasing and ADC reference stabilization.
For engineers reviewing the UDZ3V6B-7 datasheet, UDZ3V6B-7 pinout, UDZ3V6B-7 application, or UDZ3V6B-7 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (625 °C/W), reverse leakage (<10 µA at 1.0 V), cathode-band polarity marking, and SOD323 package compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage under varying load and temperature conditions. Its sharp knee characteristics and tight 3.6 V tolerance enable accurate voltage clamping in feedback loops and reference dividers.
Designed for ambient temperatures from –65 °C to +150 °C, it features a 625 °C/W junction-to-ambient thermal resistance on FR-4 PCBs and exhibits <0.1% typical temperature coefficient near its 3.6 V operating point, minimizing drift in precision analog systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.60–3.845 V at IZT = 5 mA - defines regulated output voltage range for reference or clamp applications |
| Power Dissipation (PD) | 200 mW - maximum continuous power handling on standard FR-4 layout before thermal derating |
| Zener Impedance (ZZT) | 100 Ω at 5 mA - indicates voltage stability under small-signal AC load variations |
| Reverse Leakage (IR) | ≤10 µA at VR = 1.0 V - ensures minimal error current in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 625 °C/W - determines junction temperature rise per milliwatt dissipated on recommended pad layout |
| Operating Temperature | –65 °C to +150 °C - supports automotive under-hood and industrial control environments |
Pinout & Package
Package: SOD323 - ultra-small plastic surface-mount case (1.30 × 1.70 × 0.95 mm), UL 94V-0 rated, matte tin-plated alloy 42 leadframe, cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias configuration; forms ground-referenced voltage clamp |
| Cathode | Breakdown voltage output terminal | Marked with band; connected to regulated voltage rail; carries full zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Precision Zener voltage tolerance | ±3.5% (3.60–3.845 V) - enables direct replacement in 3.3 V system references without trimming |
| AEC-Q101 qualification | Qualified for automotive electronics - meets stress testing requirements for temperature cycling, HTRB, and ESD |
| Low dynamic impedance | 100 Ω at 5 mA - maintains <1 mV output variation per 100 µA load change in feedback networks |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies strict environmental compliance for EU and global OEM programs |
Applications
| Automotive Sensor Biasing | Industrial ADC Reference |
|---|---|
Use Scenario: Providing stable bias voltage to MEMS pressure sensors in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference for sensor excitation circuitry. Use Value: Tight 3.6 V tolerance and –65 °C to +150 °C operation ensure consistent sensor output across extreme under-hood temperatures. | Use Scenario: Generating precise 3.6 V reference for 12-bit SAR ADCs in programmable logic controllers. IC Role / Device Role / Timing Role: Low-drift analog voltage reference source. Use Value: 100 Ω ZZT and <10 µA leakage minimize code errors and offset drift in high-resolution data acquisition. |
| USB Port Overvoltage Clamp | Low-Power IoT Voltage Monitor |
Use Scenario: Protecting 3.3 V USB data lines from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-response shunt clamp for ESD and surge suppression. Use Value: Sharp breakdown knee and 200 mW rating allow reliable clamping of 8 kV HBM ESD pulses without latch-up or degradation. | Use Scenario: Monitoring battery voltage in coin-cell-powered BLE modules. IC Role / Device Role / Timing Role: Low-current zener reference for comparator-based undervoltage detection. Use Value: Sub-10 µA leakage at 1 V reverse bias extends shelf life and operational runtime in µA-level sleep modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V6,115 (Nexperia) | Same 3.6 V nominal, ±5% tolerance, SOD323, but higher ZZT = 150 Ω at 5 mA | Less stable under dynamic load; suitable only where tighter regulation not required | Select when cost sensitivity outweighs regulation accuracy needs |
| MMSZ4685T1G (ON Semiconductor) | 3.6 V nominal, ±5%, SOD123 package (larger footprint), RθJA = 500 °C/W | Lower thermal resistance but incompatible with fine-pitch SOD323 layouts | Choose when board space allows larger package and higher power margin is needed |
Compared with BZX384-B3V6 and MMSZ4685T1G, UDZ3V6B-7 delivers superior voltage tolerance (±3.5% vs. ±5%), lower dynamic impedance, and AEC-Q101 qualification-making it optimal for automotive and high-accuracy industrial references where SOD323 size is mandatory.
Availability
UDZ3V6B-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial ADC reference design, USB port overvoltage protection, and low-power IoT voltage monitoring requiring stable component supply across extended temperature ranges.
Supply support for UDZ3V6B-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 the Americas.
The UDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and clamping in space-constrained, thermally demanding applications including automotive, industrial, and portable electronics.
FAQ
What is the maximum reverse voltage (VR) that UDZ3V6B-7 can withstand before breakdown?
The UDZ3V6B-7 begins controlled Zener breakdown at 3.60 V minimum and reaches full regulation by 3.845 V at 5 mA. Below 1.0 V reverse bias, leakage remains ≤10 µA - so 1.0 V is the practical non-breakdown limit for safe blocking operation in clamp or reference configurations.
Is UDZ3V6B-7 compatible with lead-free reflow soldering processes?
Yes. UDZ3V6B-7 is fully RoHS-compliant and rated for lead-free reflow per JEDEC J-STD-020D Level 1 moisture sensitivity. Its matte tin annealed terminals meet MIL-STD-202 Method 208 solderability requirements and withstand peak reflow temperatures up to 260 °C.
How does the SOD323 package affect thermal performance in high-density PCB layouts?
The SOD323 package has a junction-to-ambient thermal resistance of 625 °C/W on standard FR-4 with Diodes' recommended pad layout. In dense layouts, thermal relief must be minimized and adjacent copper pours avoided to prevent localized heating that could shift Zener voltage or accelerate aging.
Can UDZ3V6B-7 replace a 3.3 V Zener diode in a voltage reference circuit?
No - UDZ3V6B-7 is specified at 3.6 V nominal (3.60–3.845 V), not 3.3 V. Using it in a 3.3 V reference would cause over-regulation and potential downstream component stress. For 3.3 V applications, consider UDZ3V3B-7 (3.3 V variant in same series).
UDZ3V6B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±3%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
UDZ3V6B-7 FAQ
1.How can I place an order for UDZ3V6B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for UDZ3V6B-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 UDZ3V6B-7 reliable?
The price and inventory of UDZ3V6B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDZ3V6B-7 is usually 5 days.
3.What payment methods are accepted for UDZ3V6B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDZ3V6B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDZ3V6B-7?
UDZ3V6B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDZ3V6B-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 UDZ3V6B-7?
For technical support, including UDZ3V6B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDZ3V6B-7 requirements.
6.How does Aetrix verify that UDZ3V6B-7 is sourced from the original manufacturer or authorized distributors?
All UDZ3V6B-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 UDZ3V6B-7 meets industry standards.
7.What is the process for return or replacement of UDZ3V6B-7?
All UDZ3V6B-7 units undergo pre-shipment inspection (PSI). If there is an issue with UDZ3V6B-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 UDZ3V6B-7 part is unused and in its original packaging.
Return procedure for UDZ3V6B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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