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Diodes Incorporated BZT52C39S-7
- Part No.:
- BZT52C39S-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
BZT52C39S-7.pdf
- Description:
- DIODE ZENER 39V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2
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Product details
Overview
BZT52C39S-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 39 V zener voltage (37–41 V range at 2 mA), 200 mW power dissipation, and SOD323 package. It provides precise voltage regulation in low-power biasing, overvoltage protection, and reference applications for industrial sensors and automotive ECUs.
For engineers reviewing the BZT52C39S-7 datasheet, BZT52C39S-7 pinout, BZT52C39S-7 application, or BZT52C39S-7 equivalent, key selection criteria include zener voltage tolerance (±5.1%), dynamic impedance (130 Ω @ 2 mA), temperature coefficient (+27.3 mV/°C), and AEC-Q101 qualification for automotive reliability.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying current loads. Its planar die construction ensures consistent breakdown characteristics, while the SOD323 package supports high-density PCB layouts and automated reflow assembly.
The device exhibits a positive temperature coefficient of +27.3 mV/°C and maximum reverse leakage of 0.1 µA at 33.4 V, enabling predictable thermal drift compensation in precision reference circuits. Its 130 Ω dynamic impedance at 2 mA defines regulation accuracy under light-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, 37–41 V range at IZT = 2 mA - sets regulated output level with ±5.1% tolerance |
| Power Dissipation (PD) | 200 mW - limits continuous thermal load on FR-4 PCB with standard pad layout |
| Zener Impedance (ZZT) | 130 Ω @ 2 mA - determines voltage deviation under small-signal current variation |
| Reverse Leakage (IR) | 0.1 µA @ 33.4 V - defines minimum off-state current in protection circuits |
| Temperature Coefficient | +27.3 mV/°C - quantifies zener voltage drift per degree Celsius rise |
| Package | SOD323 - 1.3 × 1.7 mm footprint, cathode band polarity marking, RoHS/Green compliant |
Pinout & Package
SOD323 is a two-terminal surface-mount package with cathode identified by a band on the top surface. The device has no internal leads; terminals are formed by the alloy 42 leadframe with matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side in reverse-biased regulation configuration |
| Cathode | Reverse breakdown terminal / Zener output node | Marked with band; connected to regulated voltage rail or clamping point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and ESD testing |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; UL 94V-0 flammability rating |
| Moisture sensitivity Level 1 | No bake required before reflow; compatible with standard J-STD-020 assembly processes |
| Planar die technology | Ensures tight VZ distribution and stable long-term parametric drift |
Applications
| Industrial Sensor Biasing | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Providing stable excitation voltage for resistive bridge sensors in factory automation systems. IC Role / Device Role / Timing Role: Zener reference diode establishing fixed 39 V bias point for analog front-end conditioning. Use Value: Maintains sensor linearity and offset stability across -40°C to +125°C ambient with <±0.5% total error contribution. | Use Scenario: Generating a calibrated reference for microcontroller ADC monitoring of 12 V battery rail in engine control units. IC Role / Device Role / Timing Role: Precision shunt regulator supplying known voltage to ADC reference input. Use Value: Enables accurate battery state-of-charge estimation with ±1.2% full-scale error over lifetime, supported by AEC-Q101 qualification. |
| Overvoltage Clamp for CAN Transceivers | Low-Power Power Supply Regulation |
Use Scenario: Protecting ISO 11898-2 compliant CAN bus transceivers against load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting bus voltage during surge events. Use Value: Limits peak voltage to 41 V with <100 ns response, preventing transceiver latch-up without adding series resistance. | Use Scenario: Regulating auxiliary 39 V rail for low-current logic circuitry in telecom power modules. IC Role / Device Role / Timing Role: Passive voltage regulator replacing active LDO where quiescent current must be minimized. Use Value: Delivers stable 39 V output at ≤2 mA load with 0.1 µA leakage, reducing standby power by 92% vs. typical LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5270BS-7-F | Zener voltage 39 V (37–41 V), same SOD323 package, but 350 mW PD and higher ZZK (350 Ω) | Higher power handling enables transient clamping in higher-energy surge environments | Select when >200 mW pulse dissipation is required; verify thermal layout for 350 mW derating |
| BZX384-C39,115 | Zener voltage 39 V (37–41 V), SOD323 package, but 250 mW PD and tighter VZ tolerance (±5%) | Lower ZZT (100 Ω) improves regulation accuracy in precision references | Prefer for metrology-grade references where <100 Ω impedance reduces load-induced error |
Compared with BZT52C39S-7, MMBZ5270BS-7-F offers higher surge energy absorption but looser low-current regulation, while BZX384-C39,115 delivers tighter impedance for precision biasing at the cost of reduced automotive qualification scope.
Availability
BZT52C39S-7 is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive ECU voltage reference, and overvoltage clamp applications requiring stable component supply and AEC-Q101 compliance.
Supply support for BZT52C39S-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 BZT52CxxS series belongs to Diodes' automotive-qualified Zener diode product line, engineered for reliable voltage regulation and transient suppression in harsh-environment electronics such as engine control, body electronics, and ADAS subsystems.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT52C39S-7 has a nominal zener voltage of 39 V with a guaranteed range of 37–41 V at test current (2 mA). Its absolute maximum reverse voltage before destructive breakdown exceeds 45 V, but sustained operation above 41 V risks thermal runaway due to its 200 mW power limit and 130 Ω dynamic impedance.
Is this part suitable for use in automotive applications?
Yes - the BZT52C39S-7 is explicitly qualified to AEC-Q101 standards, including stress tests for temperature cycling, humidity, and mechanical shock. Its SOD323 package, halogen-free construction, and operating range (-65°C to +150°C) meet automotive electronics requirements for engine bay and chassis-mounted modules.
How does the temperature coefficient affect circuit performance?
With a +27.3 mV/°C temperature coefficient, the zener voltage increases linearly with junction temperature. At 100°C ambient (assuming ~25°C rise), VZ rises by ~2.7 V - critical for precision references. Designers must either compensate thermally or restrict ambient range to ±20°C for <±0.3 V drift.
Can this diode replace a BZT52C36S-7 in an existing design?
Direct substitution is not recommended without circuit validation: BZT52C36S-7 has 36 V nominal VZ (34–38 V), lower temperature coefficient (+25.2 mV/°C), and 90 Ω ZZT. Swapping introduces +3 V offset and altered thermal drift, potentially violating voltage margin in clamping or reference roles.
BZT52C39S-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BZT52C39S-7 FAQ
1.How can I place an order for BZT52C39S-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C39S-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 BZT52C39S-7 reliable?
The price and inventory of BZT52C39S-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C39S-7 is usually 5 days.
3.What payment methods are accepted for BZT52C39S-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C39S-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C39S-7?
BZT52C39S-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C39S-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 BZT52C39S-7?
For technical support, including BZT52C39S-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C39S-7 requirements.
6.How does Aetrix verify that BZT52C39S-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C39S-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 BZT52C39S-7 meets industry standards.
7.What is the process for return or replacement of BZT52C39S-7?
All BZT52C39S-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C39S-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 BZT52C39S-7 part is unused and in its original packaging.
Return procedure for BZT52C39S-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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