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Diodes Incorporated BZT52C20T-7
- Part No.:
- BZT52C20T-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C20T-7.pdf
- Description:
- DIODE ZENER 20V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,635
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Product details
Overview
BZT52C20T-7 from Diodes Incorporated is a surface-mount 20 V Zener diode in SOD523 package, rated for 300 mW power dissipation, 5 mA test current, and 55 Ω maximum Zener impedance at 1 kHz; it provides precise voltage regulation in low-power biasing and reference circuits for industrial sensors and portable power management.
For engineers reviewing the BZT52C20T-7 datasheet, BZT52C20T-7 pinout, BZT52C20T-7 application, or BZT52C20T-7 equivalent, key selection criteria include nominal Zener voltage (20 V ±5.5%), temperature coefficient (+14.0 mV/°C), reverse leakage (<0.1 µA @ 14.4 V), thermal resistance (417 °C/W), and JEDEC-qualified reliability for high-stability embedded designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a tightly controlled 20 V nominal Zener voltage at 5 mA test current, exhibiting a positive temperature coefficient of +14.0 mV/°C - enabling predictable drift compensation in temperature-sensitive references. Its 55 Ω dynamic impedance at 1 kHz ensures stable regulation under small-signal variations.
The device uses a planar silicon junction structure in a molded plastic SOD523 package with matte tin–annealed alloy 42 leads, optimized for low-profile PCB mounting and compliant with J-STD-020 Level 1 moisture sensitivity. It is fully RoHS-compliant, halogen- and antimony-free, and qualified to JEDEC reliability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range at 5 mA - defines stable regulation point for precision reference circuits |
| Power Dissipation (PD) | 300 mW at 25°C ambient - sets maximum continuous DC power handling on standard FR-4 board |
| Zener Impedance (ZZT) | 55 Ω max at 1 kHz - determines AC regulation stability and noise rejection in feedback paths |
| Reverse Leakage (IR) | <0.1 µA @ 14.4 V - ensures minimal quiescent current draw in battery-powered voltage monitors |
| Temperature Coefficient | +14.0 mV/°C - enables predictable voltage drift tracking for temperature-compensated designs |
| Thermal Resistance (RθJA) | 417 °C/W - quantifies junction-to-ambient self-heating under load; critical for derating above 25°C |
Pinout & Package
Package: SOD523 - ultra-compact, low-profile surface-mount package (1.25 mm × 0.85 mm × 0.65 mm) with cathode band marking; suitable for space-constrained PCB layouts and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; supplies regulated 20 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-qualified reliability | Qualified to high-reliability standards per AEC-Q references - supports long-term stability in industrial control modules |
| Low-profile SOD523 package | Height ≤0.65 mm - enables use in ultra-thin consumer wearables and compact IoT sensor nodes |
| Green compound molding | UL 94V-0 flammability rating with <900 ppm Br/Cl and <1000 ppm Sb - meets strict environmental compliance for global OEMs |
| Matte tin–annealed terminations | Solderable per MIL-STD-202, Method 208 - ensures robust reflow joint integrity in high-volume SMT assembly |
Applications
| Industrial Sensor Biasing | Portable Device Voltage Reference |
|---|---|
|
Use Scenario: Providing stable bias voltage for analog front-end amplifiers in temperature and pressure transducers. IC Role / Device Role / Timing Role: Zener voltage reference source for op-amp input stage stabilization. Use Value: 20 V regulation with ±5.5% tolerance and <0.1 µA leakage ensures accurate signal conditioning without loading sensor outputs. |
Use Scenario: Generating fixed reference for ADC voltage scaling in handheld medical monitors. IC Role / Device Role / Timing Role: Precision DC reference node for 12-bit SAR ADC reference divider networks. Use Value: 55 Ω Zener impedance minimizes code-dependent reference variation, improving measurement repeatability across battery discharge cycles. |
| USB-C Power Negotiation Clamp | Automotive ECU Signal Conditioning |
|
Use Scenario: Clamping CC line voltage during USB PD communication handshake to prevent overvoltage damage. IC Role / Device Role / Timing Role: Overvoltage protection element limiting CC pin to safe 20 V ceiling. Use Value: Fast reverse recovery and 300 mW surge capability absorb transient energy without latch-up in 5 V–20 V interface zones. |
Use Scenario: Stabilizing microcontroller I/O rail voltage in engine control units exposed to load dump transients. IC Role / Device Role / Timing Role: Secondary voltage clamp protecting 3.3 V logic inputs from 12 V system spikes. Use Value: +14.0 mV/°C tempco allows predictable clamping shift across -40°C to +125°C operating range, avoiding false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242B-7-F | 20 V nominal, 500 mW PD, SOT-23 package, 30 Ω ZZT | Higher power rating and lower impedance, but larger footprint and 3-pin configuration | Select when higher surge tolerance or lower dynamic impedance is required; not drop-in due to package and pin count mismatch |
| BZX84-C20-7-F | 20 V nominal, 300 mW PD, SOT-23 package, 50 Ω ZZT, AEC-Q101 qualified | Automotive-grade qualification and identical power rating, but 2.9 mm × 1.3 mm SOT-23 vs. 1.25 mm × 0.85 mm SOD523 | Prefer for automotive systems requiring PPAP documentation; choose BZT52C20T-7 for space-constrained non-automotive designs |
Compared with MMBZ5242B-7-F and BZX84-C20-7-F, BZT52C20T-7 offers the smallest PCB footprint and JEDEC reliability validation, while trading off slightly higher impedance and non-automotive qualification - ideal for cost- and size-sensitive industrial and portable electronics where AEC-Q is not mandated.
Availability
BZT52C20T-7 is available at Aetrix Electronics and suitable for industrial sensor biasing, portable device voltage reference, USB-C power negotiation clamp, and automotive ECU signal conditioning requiring stable component supply across production lifecycles.
Supply support for BZT52C20T-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 BZT52 series belongs to Diodes' broad portfolio of surface-mount Zener diodes engineered for precision voltage regulation and overvoltage protection in space-constrained, high-reliability applications across industrial, computing, and consumer markets.
FAQ
What is the maximum reverse voltage before breakdown for BZT52C20T-7?
The BZT52C20T-7 exhibits a nominal Zener voltage of 20 V at 5 mA test current, with a guaranteed range of 18.8 V to 21.2 V. Breakdown begins gradually above ~18.8 V, and full regulation is established within this specified window - no separate "maximum reverse voltage" limit applies beyond its rated 20 V nominal value.
Is BZT52C20T-7 suitable for automotive applications?
BZT52C20T-7 is not AEC-Q200 qualified; Diodes offers automotive-grade variants with Q-suffix (e.g., BZT52C20TQ-7-F) manufactured in IATF 16949-certified facilities and PPAP-capable. For non-safety-critical automotive subsystems where qualification is not mandated, BZT52C20T-7 may be used with customer risk assessment.
How does the +14.0 mV/°C temperature coefficient affect circuit performance?
The positive temperature coefficient means the Zener voltage increases by approximately 14.0 mV per degree Celsius rise in junction temperature. In precision references, this drift must be compensated via circuit topology (e.g., combining with negative-tempco components) or calibrated out in firmware - especially critical in environments spanning -55°C to +150°C.
Can BZT52C20T-7 replace a 20 V Zener in a 12 V rail clamp circuit?
Yes - when reverse-biased, BZT52C20T-7 clamps at ~20 V, making it appropriate for protecting downstream 12 V logic from transients exceeding that threshold. Its 300 mW rating supports short-duration surges; for sustained overvoltage, ensure average power remains below derated limits per the power derating curve in Figure 1.
BZT52C20T-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 300 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-523
BZT52C20T-7 FAQ
1.How can I place an order for BZT52C20T-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20T-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 BZT52C20T-7 reliable?
The price and inventory of BZT52C20T-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C20T-7 is usually 5 days.
3.What payment methods are accepted for BZT52C20T-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20T-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20T-7?
BZT52C20T-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20T-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 BZT52C20T-7?
For technical support, including BZT52C20T-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20T-7 requirements.
6.How does Aetrix verify that BZT52C20T-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C20T-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 BZT52C20T-7 meets industry standards.
7.What is the process for return or replacement of BZT52C20T-7?
All BZT52C20T-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20T-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 BZT52C20T-7 part is unused and in its original packaging.
Return procedure for BZT52C20T-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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