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Diodes Incorporated UDZ13B-7
- Part No.:
- UDZ13B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
UDZ13B-7.pdf
- Description:
- DIODE ZENER 13V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
UDZ13B-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal zener voltage 13.2 V (min 12.91 V, max 13.49 V), 200 mW power dissipation, 37 Ω zener impedance at 5 mA, and ±0.1 µA reverse leakage at 10 V. It uses SOD323 package and serves as voltage reference or overvoltage clamp in low-power analog circuits.
For engineers reviewing the UDZ13B-7 datasheet, UDZ13B-7 pinout, UDZ13B-7 application, or UDZ13B-7 equivalent, key selection criteria include zener voltage tolerance (±2.2%), thermal coefficient (~0.08%/°C), junction-to-ambient thermal resistance (625 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode with sharp knee characteristics and tightly controlled voltage regulation across 5 mA test current. Its low 37 Ω dynamic impedance ensures stable reference performance under varying load conditions.
Designed for surface-mount assembly on FR-4 PCBs using recommended pad layout, it delivers consistent regulation from −65 °C to +150 °C and maintains <0.1 µA reverse leakage up to 10 V, enabling reliable operation in battery-powered and automotive sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12.91–13.49 V at 5 mA - defines regulated output voltage window for reference or clamping |
| Power Dissipation (PD) | 200 mW - limits continuous operating current to ~15 mA at 13.2 V without heatsinking |
| Zener Impedance (ZZT) | 37 Ω at 5 mA - determines output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.1 µA at 10 V - ensures minimal quiescent current in standby voltage-monitoring circuits |
| Thermal Resistance (RθJA) | 625 °C/W - requires derating above 25 °C ambient; full power only at TA ≤ 75 °C |
| Operating Temperature | −65 to +150 °C - supports under-hood automotive and industrial control applications |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements |
Pinout & Package
Package: SOD323 - ultra-compact 2-pin surface-mount case (1.30 mm × 1.70 mm × 0.90 mm), cathode identified by band marking, matte tin-plated terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked with band; supplies stable voltage relative to anode when reverse-biased ≥10 V |
Key Features
| Feature | Design Value |
|---|---|
| Sharp breakdown knee | Enables precise voltage threshold detection without hysteresis in protection circuits |
| Tight voltage tolerance | ±2.2% (12.91–13.49 V) reduces need for post-assembly calibration in reference designs |
| AEC-Q101 qualification | Validates reliability for automotive body electronics, infotainment power rails, and sensor biasing |
| Halogen- and antimony-free | Meets IEC 61249-2-21 "Green" standard (<900 ppm Br/Cl, <1000 ppm Sb) |
| Moisture sensitivity Level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and process complexity |
Applications
| Automotive Sensor Biasing | Industrial Analog Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in engine coolant modules. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC measurement front-end. Use Value: Maintains <±0.5% reference drift over −40 to +125 °C, enabling sub-0.1 °C temperature resolution. | Use Scenario: Setting accurate trip point for overvoltage lockout in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Zener-based comparator reference for fault-detection circuitry. Use Value: 37 Ω impedance ensures <10 mV shift under 1 mA load variation, preventing false triggers. |
| Portable Battery Monitor | USB-C Power Delivery Clamp |
Use Scenario: Monitoring Li-ion cell voltage during charging via microcontroller ADC with internal reference. IC Role / Device Role / Timing Role: Low-current zener shunt regulator supplying known reference to external ADC. Use Value: 0.1 µA leakage at 10 V extends battery life >2 years in always-on monitoring mode. | Use Scenario: Clamping transient surges on USB-C CC lines during hot-plug events. IC Role / Device Role / Timing Role: Fast-response overvoltage protector limiting CC line to ≤13.5 V. Use Value: Sharp breakdown at 12.91 V activates clamping before damage threshold of USB PD PHY ICs (typically 14 V abs max). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B13,115 (Nexperia) | Same SOD323 package; 13 V nominal, ±5% tolerance (12.35–13.65 V); 40 Ω ZZT | Looser voltage tolerance increases calibration burden in precision references | Select when cost sensitivity outweighs tight regulation needs |
| MMSZ5242B-TP (Micro Commercial) | SOD-123 package; 13 V nominal, ±5%; 30 Ω ZZT; RθJA = 500 °C/W | Larger footprint and higher thermal resistance limit use in dense automotive PCBs | Select when board space allows larger package and higher power handling is required |
Compared with BZX384-B13 and MMSZ5242B-TP, UDZ13B-7 offers tighter voltage tolerance (±2.2% vs ±5%), AEC-Q101 qualification, and optimized thermal performance for space-constrained automotive modules-making it preferred where reference accuracy and automotive compliance are mandatory.
Availability
UDZ13B-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog reference design, and portable battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UDZ13B-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 UDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-stability voltage reference and overvoltage protection in automotive, industrial, and portable electronics where tight tolerance and AEC-Q101 compliance are critical.
FAQ
What is the maximum reverse voltage that can be continuously applied to UDZ13B-7 without breakdown?
The device is rated for 10 V reverse voltage (VR) with ≤0.1 µA leakage current. Applying ≥12.91 V will initiate controlled Zener breakdown; sustained operation above 10 V must account for power dissipation limits and thermal derating per Figure 1. Absolute maximum reverse voltage is not specified beyond the 10 V test condition.
Is UDZ13B-7 compatible with lead-free reflow profiles?
Yes. UDZ13B-7 is fully RoHS-compliant and qualified for standard lead-free reflow profiles (JEDEC J-STD-020D Level 1), with peak temperatures up to 260 °C. Its matte tin annealed terminals ensure reliable wetting and intermetallic formation without voiding or dewetting.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
Per Figure 8, UDZ13B-7 exhibits ~+0.08%/°C TC near 13 V. Over a 165 °C range, this yields ~13.2 V × 0.0008 × 165 ≈ ±174 mV total drift, or ±1.3% full-scale error-within specification for most non-precision reference uses but requiring compensation in metrology-grade systems.
Can UDZ13B-7 replace a 1N4742A in existing designs?
No. The 1N4742A is a through-hole 12 V, 1 W Zener in DO-41 package. UDZ13B-7 is SOD323, 13.2 V, 200 mW, and has different thermal and electrical behavior. Direct replacement would require PCB redesign, power derating, and verification of voltage tolerance impact on system functionality.
UDZ13B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 37 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
UDZ13B-7 FAQ
1.How can I place an order for UDZ13B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for UDZ13B-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 UDZ13B-7 reliable?
The price and inventory of UDZ13B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UDZ13B-7 is usually 5 days.
3.What payment methods are accepted for UDZ13B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UDZ13B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UDZ13B-7?
UDZ13B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UDZ13B-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 UDZ13B-7?
For technical support, including UDZ13B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UDZ13B-7 requirements.
6.How does Aetrix verify that UDZ13B-7 is sourced from the original manufacturer or authorized distributors?
All UDZ13B-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 UDZ13B-7 meets industry standards.
7.What is the process for return or replacement of UDZ13B-7?
All UDZ13B-7 units undergo pre-shipment inspection (PSI). If there is an issue with UDZ13B-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 UDZ13B-7 part is unused and in its original packaging.
Return procedure for UDZ13B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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