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Diodes Incorporated BZT52C20TQ-7-F
- Part No.:
- BZT52C20TQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZT52C20TQ-7-F.pdf
- Description:
- DIODE ZENER 20V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:2,580
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Product details
Overview
BZT52C20TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 20 V zener voltage (18.8–21.2 V range), 300 mW power dissipation, 55 Ω maximum zener impedance at 5 mA test current, and SOD523 package. It provides precision voltage regulation in low-power biasing, reference, and overvoltage protection circuits for automotive body control modules and industrial sensor signal conditioning.
For engineers reviewing the BZT52C20TQ-7-F datasheet, BZT52C20TQ-7-F pinout, BZT52C20TQ-7-F application, or BZT52C20TQ-7-F equivalent, key selection criteria include zener voltage tolerance (±5.5%), temperature coefficient (+14.0 mV/°C), reverse leakage (<0.1 µA @ 14.4 V), and JEDEC-qualified reliability for AEC-Q200-aligned designs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its 20 V nominal zener voltage is specified at 5 mA test current, with 55 Ω dynamic impedance ensuring minimal voltage deviation during small-signal regulation.
The device features a negative temperature coefficient of +14.0 mV/°C - indicating increasing zener voltage with rising junction temperature - and is rated for operation from –55 °C to +150 °C, supporting high-reliability automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V range @ 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 300 mW - maximum continuous power handling on FR-4 board with 2 oz copper, limiting usable current in regulation applications |
| Zener Impedance (ZZT) | 55 Ω max @ 1 kHz, 5 mA - determines AC voltage variation under dynamic load changes |
| Reverse Leakage (IR) | <0.1 µA @ 14.4 V - ensures negligible quiescent current in standby or high-impedance reference nodes |
| Temperature Coefficient | +14.0 mV/°C - quantifies zener voltage drift per degree Celsius rise, critical for thermal stability in unregulated environments |
| Package | SOD523 - 1.25 mm × 0.85 mm footprint with cathode band marking, enabling high-density PCB layouts |
Pinout & Package
Two-terminal device in SOD523 package: anode and cathode marked by molded cathode band on top surface. No internal leads or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener operation | Reference ground or common return path in shunt regulator topology |
| Cathode | Current exit terminal in forward bias; higher-potential terminal during Zener breakdown | Connected to regulated voltage rail; polarity must match schematic symbol to avoid reverse conduction failure |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-qualified reliability | Qualified to AEC-Q200 stress requirements and manufactured in IATF 16949-certified facilities for automotive-grade consistency |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb), meeting RoHS 3 and UL 94V-0 flammability standards |
| Low-profile SOD523 footprint | 1.25 mm × 0.85 mm outline with 0.10–0.30 mm lead length supports miniaturized PCBs and automated placement |
| Moisture sensitivity level | MSL Level 1 per J-STD-020 - no floor life limitation or bake requirement before reflow soldering |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller reset circuitry in door module ECUs. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable 20 V reference for analog comparators and LDO input staging. Use Value: Tight ±5.5% zener tolerance and low 0.1 µA leakage ensure accurate threshold detection across –40 °C to +125 °C ambient. |
Use Scenario: Precision clamping of 4–20 mA loop transmitter outputs to prevent overvoltage damage to downstream ADC inputs. IC Role / Device Role / Timing Role: Overvoltage protection element placed in parallel with signal path to clamp transient excursions above 21.2 V. Use Value: 55 Ω zener impedance limits clamping voltage overshoot during fast transients, preserving signal integrity. |
| Portable Medical Instrument Power Rails | Smart Meter Reference Subsystem |
Use Scenario: Low-power voltage reference for battery-operated glucose meters requiring stable analog front-end biasing. IC Role / Device Role / Timing Role: Passive Zener reference replacing active references where ultra-low quiescent current is mandatory. Use Value: 0.1 µA reverse leakage at 14.4 V enables multi-year battery life without compromising reference accuracy. |
Use Scenario: Calibration reference in electricity metering ICs where long-term drift must remain below 100 ppm/°C over 10-year field life. IC Role / Device Role / Timing Role: Primary voltage reference source for metrology ADC offset trimming and gain calibration routines. Use Value: +14.0 mV/°C temperature coefficient allows predictable compensation algorithms in firmware-based calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5249B-7-F | 20 V nominal, ±5% tolerance, 500 mW PD, SOD-123 package (larger footprint, higher power) | Higher power handling suits higher-current shunt regulation but requires 30% more board area | Select when >300 mW dissipation is needed; not drop-in due to SOD-123 vs. SOD523 pad layout mismatch |
| BZX584C20 | 20 V nominal, ±5%, 300 mW, SOD-323 package (1.7 × 1.3 mm), 100 Ω ZZT | Higher impedance reduces regulation precision; same thermal rating but larger size | Acceptable where tighter voltage stability is non-critical and legacy SOD-323 tooling exists |
Compared with MMSZ5249B-7-F and BZX584C20, BZT52C20TQ-7-F delivers superior voltage regulation fidelity (55 Ω vs. ≥100 Ω ZZT) in the smallest footprint (SOD523), making it optimal for space-constrained, low-leakage, automotive-qualified designs.
Availability
BZT52C20TQ-7-F is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interfaces, portable medical instruments, and smart meter reference subsystems requiring stable component supply with full traceability and AEC-Q200-aligned sourcing.
Supply support for BZT52C20TQ-7-F 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 BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for precision voltage reference and overvoltage protection in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage this Zener diode can withstand before breakdown?
The BZT52C20TQ-7-F has a nominal zener voltage of 20 V, with a guaranteed breakdown range of 18.8 V to 21.2 V at 5 mA test current. It is not rated for reverse blocking beyond its zener region - sustained reverse voltage below 18.8 V results in sub-µA leakage, while voltages above 21.2 V initiate controlled breakdown.
Is this part qualified for automotive use under AEC-Q200?
Yes - the "Q" suffix in BZT52C20TQ-7-F explicitly denotes qualification to AEC-Q200, with production in IATF 16949-certified facilities, PPAP capability, and compliance with automotive change control requirements. Full qualification data is documented in Diodes' automotive product portal.
How does the temperature coefficient affect circuit performance?
With a +14.0 mV/°C temperature coefficient, the zener voltage increases linearly with junction temperature. At 100 °C junction temperature, the voltage rises ~840 mV above its 25 °C value - requiring thermal compensation in high-precision references or derating in high-ambient applications.
Can this diode be used in place of a 22 V Zener?
No - BZT52C20TQ-7-F is strictly a 20 V device (18.8–21.2 V range). Substituting it for a 22 V Zener (e.g., BZT52C22T) would result in premature conduction and potential over-regulation. The 22 V variant has distinct marking code (WN), different impedance (55 Ω), and higher temperature coefficient (+15.4 mV/°C).
BZT52C20TQ-7-F 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZT52C20TQ-7-F FAQ
1.How can I place an order for BZT52C20TQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C20TQ-7-F 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 BZT52C20TQ-7-F reliable?
The price and inventory of BZT52C20TQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C20TQ-7-F is usually 5 days.
3.What payment methods are accepted for BZT52C20TQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C20TQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C20TQ-7-F?
BZT52C20TQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C20TQ-7-F 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 BZT52C20TQ-7-F?
For technical support, including BZT52C20TQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C20TQ-7-F requirements.
6.How does Aetrix verify that BZT52C20TQ-7-F is sourced from the original manufacturer or authorized distributors?
All BZT52C20TQ-7-F 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 BZT52C20TQ-7-F meets industry standards.
7.What is the process for return or replacement of BZT52C20TQ-7-F?
All BZT52C20TQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C20TQ-7-F, 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 BZT52C20TQ-7-F part is unused and in its original packaging.
Return procedure for BZT52C20TQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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