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Diodes Incorporated BZT52C20-13
- Part No.:
- BZT52C20-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C20-13.pdf
- Description:
- DIODE ZENER 20V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,128
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Product details
Overview
BZT52C20-13 from Diodes Incorporated is a surface-mount 20 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±5% zener voltage tolerance (18.8–21.2 V), 55 Ω maximum zener impedance at 5 mA test current, and 0.1 µA maximum reverse leakage at 14.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power DC supply regulation circuits.
For engineers reviewing the BZT52C20-13 datasheet, BZT52C20-13 pinout, BZT52C20-13 application, or BZT52C20-13 equivalent, key selection criteria include its 20 V nominal breakdown voltage, SOD123 footprint compatibility, AEC-Q101 qualification for automotive use, thermal resistance of 338 °C/W (junction-to-ambient), and 150 °C maximum operating temperature.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across load terminals under varying current conditions. Its planar die construction ensures consistent breakdown characteristics and low dynamic impedance (55 Ω @ 5 mA), while the SOD123 package supports automated placement and reflow soldering.
The device exhibits a negative temperature coefficient of −3.5 mV/°C near 20 V, enabling predictable drift behavior in temperature-sensitive references. Its 0.010 g mass and UL 94V-0 molded plastic case meet stringent reliability and safety requirements for space-constrained industrial and automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range at 5 mA - defines clamping threshold for overvoltage protection or reference stability |
| Power Dissipation (PD) | 370 mW @ TA = +25°C - limits continuous power handling on standard FR-4 PCB without heatsinking |
| Zener Impedance (ZZT) | 55 Ω max @ IZT = 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.1 µA max @ VR = 14.4 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 338 °C/W - dictates junction temperature rise per watt dissipated in ambient air |
| Operating Temperature | −65 °C to +150 °C - supports deployment in under-hood automotive or industrial environments |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.010 g; RoHS-compliant matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of circuit; reverse voltage applied between cathode and anode to initiate breakdown |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; supplies regulated voltage when reverse-biased above VZ; used as reference input for regulators or comparator thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight VZ tolerance (±5%) and repeatable Zener impedance across production lots |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units and body electronics |
| SOD123 package | Enables high-density PCB layouts and compatibility with standard pick-and-place and reflow processes |
| Halogen- and antimony-free "Green" compound | Meets environmental compliance requirements (<900 ppm Br/Cl, <1000 ppm Sb) without compromising thermal performance |
Applications
| Power Supply Voltage Clamp | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamping transient surges on 24 V DC rail in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode acts as shunt regulator to limit voltage excursion to ≤21.2 V during ESD or load dump events. Use Value: Prevents damage to downstream 20 V-rated LDOs and logic interfaces by diverting excess current above 14.4 V threshold. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers in automotive telematics units. IC Role / Device Role / Timing Role: Provides stable 20 V reference to resistor-divider network feeding supervisor IC input. Use Value: Enables accurate brown-out detection at 90% of nominal supply, independent of temperature-induced drift beyond −3.5 mV/°C. |
| ADC Reference Stabilization | LED Current Regulation |
|
Use Scenario: Stabilizing reference voltage for 12-bit SAR ADC in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Supplies low-noise 20 V reference to voltage divider scaling analog input range. Use Value: Reduces full-scale error from ±1.5% to ±0.5% by minimizing VZ drift and impedance-induced loading effects. |
Use Scenario: Setting constant current for high-brightness white LEDs in automotive interior lighting. IC Role / Device Role / Timing Role: Forms reference node for op-amp-based current-sense feedback loop. Use Value: Maintains LED brightness within ±3% over −40 °C to +125 °C by compensating for forward voltage shift with known TC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | Same 20 V nominal VZ, but SOT-23 package (higher RθJA = 390 °C/W); 600 mW PD rating | Requires larger pad layout; less suitable for ultra-thin PCBs due to taller profile | Prefer when higher power margin is needed and board space allows SOT-23 footprint |
| BZX84-C20 | 20 V VZ, SOT-23 package, 350 mW PD @ TA, ±5% tolerance, but not AEC-Q101 qualified | Lacks automotive reliability validation; limited to commercial-grade consumer or industrial use | Choose only for cost-sensitive non-automotive designs where qualification is unnecessary |
Compared with MMBZ5242B-7-F and BZX84-C20, BZT52C20-13 offers superior thermal performance in compact SOD123 form factor and certified AEC-Q101 reliability-making it optimal for space-constrained automotive modules requiring long-term voltage stability under thermal cycling.
Availability
BZT52C20-13 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and medical portable device power supervision requiring stable component supply and traceable sourcing.
Supply support for BZT52C20-13 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.
The BZT52 series targets general-purpose Zener regulation in space-constrained, high-volume applications-designed for robustness in automated assembly and compliance with automotive AEC-Q101 and environmental standards.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C20-13?
The BZT52C20-13 has a nominal zener voltage of 20 V with a guaranteed range of 18.8 V to 21.2 V at 5 mA test current. Breakdown begins at the minimum specified value (18.8 V), and operation below this voltage results in negligible reverse current (≤0.1 µA at 14.4 V). It is not rated for sustained reverse bias below VZ.
Can BZT52C20-13 be used in parallel for higher power dissipation?
No-Zener diodes exhibit negative temperature coefficients and manufacturing tolerances that cause current imbalance when paralleled. One device will dominate conduction, leading to thermal runaway. For higher power, use a single higher-rated Zener or implement active regulation with a transistor and reference diode.
Is the SOD123 package compatible with standard reflow profiles?
Yes-the SOD123 package is qualified for lead-free reflow per J-STD-020, with moisture sensitivity level 1. Recommended peak temperature is 260 °C for ≤10 seconds; the matte tin finish ensures reliable wetting on OSP- or ENIG-finished PCBs without voiding or dewetting.
Does BZT52C20-13 require a series current-limiting resistor in all applications?
Yes-a series resistor is mandatory to limit reverse current to within the device's power and current ratings. For example, at 24 V supply and 20 V VZ, a 220 Ω resistor limits worst-case current to ~18 mA, keeping power dissipation below 370 mW. Omission risks catastrophic failure due to thermal overload.
BZT52C20-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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:
- SOD-123
BZT52C20-13 FAQ
1.How can I place an order for BZT52C20-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20-13 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 BZT52C20-13 reliable?
The price and inventory of BZT52C20-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C20-13 is usually 5 days.
3.What payment methods are accepted for BZT52C20-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20-13?
BZT52C20-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20-13 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 BZT52C20-13?
For technical support, including BZT52C20-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20-13 requirements.
6.How does Aetrix verify that BZT52C20-13 is sourced from the original manufacturer or authorized distributors?
All BZT52C20-13 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 BZT52C20-13 meets industry standards.
7.What is the process for return or replacement of BZT52C20-13?
All BZT52C20-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20-13, 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 BZT52C20-13 part is unused and in its original packaging.
Return procedure for BZT52C20-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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