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Diodes Incorporated BZT52C39LP-7
- Part No.:
- BZT52C39LP-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
BZT52C39LP-7.pdf
- Description:
- DIODE ZENER 39V 250MW DFN1006-2
- Quantity:
- Payment:
- Shipping:
Inventory:719
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Product details
Overview
BZT52C39LP-7 from Diodes Incorporated is a surface-mount Zener diode with nominal zener voltage 39 V, ±5.1% tolerance (37.0–41.0 V), 2 mA test current, 130 Ω maximum zener impedance at 2 mA, and 0.1 µA maximum reverse leakage at 36.8 V. It operates in automotive-grade AEC-Q101 qualified DFN1006-2 package for voltage regulation and overvoltage protection in compact power rails.
For engineers reviewing the BZT52C39LP-7 datasheet, BZT52C39LP-7 pinout, BZT52C39LP-7 application, or BZT52C39LP-7 equivalent, key selection criteria include zener voltage stability at 2 mA, low leakage (<0.1 µA) under near-zener bias, thermal resistance (500 °C/W), and AEC-Q101 qualification for harsh-environment reliability.
Technical Context
This device functions as a precision shunt voltage reference and transient clamp, leveraging silicon p-n junction breakdown at 39 V. Its 130 Ω dynamic impedance at 2 mA ensures stable regulation under light-load conditions, while the 0.1 µA reverse current at 36.8 V confirms tight leakage control critical for battery-backed circuits.
The DFN1006-2 package enables high-density PCB layouts and automated reflow assembly. Thermal resistance of 500 °C/W (junction-to-ambient, FR-4 board) defines its power derating curve, limiting continuous dissipation to 250 mW at 25°C ambient and requiring layout-aware thermal management above 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, 37.0–41.0 V range at 2 mA - defines clamping threshold for overvoltage protection |
| Zener Impedance (ZZT) | 130 Ω max at 2 mA - determines output voltage deviation under load transients |
| Reverse Leakage (IR) | 0.1 µA max at 36.8 V - ensures minimal standby current in always-on circuits |
| Power Dissipation (PD) | 250 mW at 25°C - sets absolute maximum continuous power before thermal runaway |
| Thermal Resistance (RθJA) | 500 °C/W - requires ≥10 mm² copper pour for >150 mW operation at 70°C ambient |
| Operating Temp Range | −65 to +150°C - supports under-hood automotive and industrial control environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress-test requirements (HTOL, TCT, etc.) |
Pinout & Package
Package: DFN1006-2 (1.00 × 0.60 × 0.50 mm), ultra-compact leadless surface-mount case with cathode indicator dot. Molded green compound, UL 94V-0 rated, NiPdAu-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower-potential rail during regulation mode |
| Cathode | Zener breakdown terminal / high-side connection | Marked with dot; connects to protected node or supply rail needing voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| DFN1006-2 footprint | Enables <0.6 mm² board area usage-critical for space-constrained wearables and sensors |
| Low reverse leakage (0.1 µA) | Minimizes quiescent current drain in battery-powered systems with 10+ year shelf life |
| Green molding compound | Halogen-free, RoHS-compliant material meeting IEC 61249-2-21 standards |
| Moisture Sensitivity Level 1 | No bake required prior to reflow-reduces manufacturing overhead and void risk |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping 48 V supply rail transients in door module ECUs exposed to load-dump events. IC Role / Device Role / Timing Role: Shunt regulator protecting MCU I/O and CAN transceiver power domains. Use Value: Withstands 39 V ±5.1% regulation window and 0.1 µA leakage, enabling robust fault immunity without loading the 48 V bus. | Use Scenario: Stabilizing reference voltage for 24-bit sigma-delta ADCs in pressure transmitters. IC Role / Device Role / Timing Role: Precision voltage clamp providing stable bias point for analog front-end circuitry. Use Value: 130 Ω zener impedance ensures <1 mV shift under 100 µA load variation-critical for sub-LSB accuracy. |
| Smart Meter Power Supply | Medical Wearable Battery Monitoring |
Use Scenario: Overvoltage protection on auxiliary 12 V DC-DC output feeding real-time clock and memory backup. IC Role / Device Role / Timing Role: Fail-safe clamp preventing data corruption during input surge events. Use Value: AEC-Q101 qualification and −65 to +150°C range ensure reliability across meter deployment lifetimes exceeding 15 years. | Use Scenario: Low-leakage voltage reference for coulomb counter IC monitoring Li-ion cell voltage during sleep mode. IC Role / Device Role / Timing Role: Stable 39 V reference source enabling accurate battery state-of-charge estimation. Use Value: 0.1 µA reverse current at 36.8 V prevents measurable battery drain over multi-year wearable operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5270BLT1G | Zener voltage 39 V, but ±5% tolerance only at 10 mA; 150 Ω ZZT at 10 mA vs. 130 Ω at 2 mA | Higher test current shifts operating point-less suitable for micro-power designs | Prefer BZT52C39LP-7 where 2 mA bias and low leakage dominate |
| SZBZX84-C39LT1G | AEC-Q101 qualified, same 39 V rating, but SOT-23 package (2.9 × 1.3 × 1.0 mm) - 4.7× larger footprint | Requires more PCB area and lacks DFN1006-2's thermal performance on dense boards | Choose BZT52C39LP-7 when board space or thermal density is constrained |
Compared with MMBZ5270BLT1G and SZBZX84-C39LT1G, BZT52C39LP-7 delivers tighter low-current regulation (2 mA), lower leakage, and superior space efficiency-making it optimal for automotive and portable electronics where size, power, and qualification rigor intersect.
Availability
BZT52C39LP-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and smart meter power supplies requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for BZT52C39LP-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 and manufacturing operations across Asia and the Americas.
The BZT52CxxLP series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive and industrial voltage regulation where reliability, small size, and low leakage are mandatory.
FAQ
What is the maximum power dissipation of BZT52C39LP-7 at 85°C ambient?
At 85°C ambient, the device's power dissipation must be derated linearly from 250 mW at 25°C using its 500 °C/W thermal resistance. The junction temperature limit is +150°C, so maximum allowable power is (150 − 85)°C ÷ 500 °C/W = 130 mW. This assumes standard FR-4 PCB with minimum pad layout per datasheet Figure 4.
Is the cathode terminal marked on the BZT52C39LP-7 package?
Yes-the cathode is indicated by a visible dot on the top surface of the DFN1006-2 package, aligned with the cathode terminal per the top-view mechanical drawing. This marking matches the polarity convention used in all BZT52CxxLP variants and is verified in the "Marking Information" section of the datasheet (DS30506 Rev. 16).
Can BZT52C39LP-7 replace BZT52C36LP-7 in a 36 V rail protection circuit?
No-BZT52C39LP-7 has a 39 V nominal zener voltage (37–41 V range), which exceeds the 36 V rail's safe clamping threshold. Using it risks insufficient protection during transients. BZT52C36LP-7 (36 V, 34–38 V range) is specifically matched to that voltage level and maintains tighter margin against overvoltage failure.
Does BZT52C39LP-7 require special handling for moisture sensitivity?
No-it is rated Moisture Sensitivity Level 1 per J-STD-020C, meaning it may be stored indefinitely at ≤30°C/60% RH without baking or dry-pack requirements. This eliminates pre-reflow bake steps and reduces manufacturing complexity versus higher-MSL components.
BZT52C39LP-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 0402 (1006 Metric)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27.3 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:
- DFN1006-2
BZT52C39LP-7 FAQ
1.How can I place an order for BZT52C39LP-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C39LP-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 BZT52C39LP-7 reliable?
The price and inventory of BZT52C39LP-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C39LP-7 is usually 5 days.
3.What payment methods are accepted for BZT52C39LP-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C39LP-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C39LP-7?
BZT52C39LP-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C39LP-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 BZT52C39LP-7?
For technical support, including BZT52C39LP-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C39LP-7 requirements.
6.How does Aetrix verify that BZT52C39LP-7 is sourced from the original manufacturer or authorized distributors?
All BZT52C39LP-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 BZT52C39LP-7 meets industry standards.
7.What is the process for return or replacement of BZT52C39LP-7?
All BZT52C39LP-7 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C39LP-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 BZT52C39LP-7 part is unused and in its original packaging.
Return procedure for BZT52C39LP-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52C39LP-7 Tags
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