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Diodes Incorporated BZT52C39LP-7B
- Part No.:
- BZT52C39LP-7B
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
BZT52C39LP-7B.pdf
- Description:
- DIODE ZENER 39V 250MW 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BZT52C39LP-7B from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 39 V, ±5.1% tolerance (37.0–41.0 V), 2 mA test current, 130 Ω maximum zener impedance at 2 mA, and 250 mW power dissipation in a DFN1006-2 package. It serves as a precision voltage reference or overvoltage clamp in low-power automotive sensor interfaces and industrial I/O protection circuits.
For engineers reviewing the BZT52C39LP-7B datasheet, BZT52C39LP-7B pinout, BZT52C39LP-7B application, or BZT52C39LP-7B equivalent, key selection criteria include zener voltage accuracy at 2 mA, low leakage (<0.1 µA @ 30.8 V), AEC-Q101 qualification, thermal resistance (500 °C/W), and DFN1006-2 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates in reverse-bias breakdown mode to regulate or clamp voltage at 39 V with a temperature coefficient of +27.3 mV/°C. Its 130 Ω dynamic impedance at 2 mA ensures stable regulation under light-load conditions, while the 0.1 µA maximum reverse current at 30.8 V enables low-power standby operation.
The DFN1006-2 package features NiPdAu-plated terminals for reliable solderability and meets J-STD-020C Level 1 moisture sensitivity. Thermal performance is specified at 500 °C/W junction-to-ambient on FR-4 with minimum pad layout, supporting operation from –65 °C to +150 °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 |
| Power Dissipation (PD) | 250 mW at 25 °C - limits continuous energy handling without heatsinking |
| Zener Impedance (ZZT) | 130 Ω max at 2 mA - determines regulation stiffness under varying load current |
| Reverse Leakage (IR) | 0.1 µA max at 30.8 V - ensures minimal standby current in battery-powered systems |
| Temp Coefficient (αVZ) | +27.3 mV/°C - quantifies voltage drift per degree Celsius rise in ambient |
| Package | DFN1006-2 (1.00 × 0.60 × 0.50 mm) - ultra-small footprint for space-constrained PCBs |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and temperature cycling |
Pinout & Package
DFN1006-2 package: 2-terminal surface-mount device with cathode indicated by dot marking on top surface. Terminals are co-planar, unidirectional, and non-polarized beyond cathode/anode assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to lower-potential side in clamping configuration; establishes bias path for reverse breakdown |
| Cathode | Zener breakdown terminal / regulated output node | Marked with dot; carries clamped voltage referenced to anode; must be routed to protected node |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small DFN1006-2 footprint | 1.00 × 0.60 mm area - enables placement in <1.5 mm² board space, critical for wearables and compact ECUs |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| Lead-free & RoHS-compliant construction | NiPdAu over copper leadframe - ensures solder joint integrity and environmental compliance without SnPb |
| Low moisture sensitivity (J-STD-020C Level 1) | No bake requirement before reflow - simplifies SMT line integration and reduces process overhead |
Applications
| Automotive Sensor Signal Conditioning | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Clamping transient spikes on 5 V or 12 V sensor supply lines in engine control modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector downstream of LDO regulators. Use Value: Limits voltage to ≤41.0 V during load dump events, preventing damage to 3.3 V ADC front-ends and microcontroller I/O pins. | Use Scenario: Protecting 4–20 mA current loop receiver inputs against ESD and surge coupling. IC Role / Device Role / Timing Role: Standby-mode voltage clamp across input filter capacitors. Use Value: Maintains <0.1 µA leakage at 30.8 V, preserving loop accuracy while absorbing >1 kV HBM transients via low-impedance breakdown path. |
| USB-C Port Overvoltage Clamp | Medical Wearable Battery Monitoring |
Use Scenario: Safeguarding USB-C VBUS detection circuitry from accidental 20 V adapter misconnection. IC Role / Device Role / Timing Role: Passive zener clamp placed between VBUS and system ground. Use Value: Activates at 37.0 V minimum, limiting peak voltage to safe levels before internal protection FETs trigger, reducing failure risk. | Use Scenario: Stabilizing reference voltage for lithium-ion cell voltage measurement in patch-style monitors. IC Role / Device Role / Timing Role: Precision voltage reference source for 12-bit SAR ADC biasing. Use Value: Delivers 39 V ±5.1% stability at 2 mA with +27.3 mV/°C TC, enabling <1% full-scale error over –20 to +70 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5270BS-7-F | 39 V nominal, SOD-523 package (1.7 × 0.9 mm), 350 mW PD, 150 Ω ZZT | Larger footprint, higher power, less suitable for ultra-dense layouts | Select when higher surge energy handling is required and board space allows |
| BZX384-C39,115 | 39 V nominal, SOD-323 package (1.7 × 1.3 mm), 300 mW PD, 150 Ω ZZT, no AEC-Q101 rating | Non-automotive qualified, wider voltage tolerance (±5%), higher leakage (0.5 µA) | Acceptable for consumer-grade applications where AEC-Q101 is not mandated |
Compared with MMBZ5270BS-7-F and BZX384-C39,115, the BZT52C39LP-7B offers the smallest footprint (DFN1006-2), AEC-Q101 qualification, and lowest leakage (0.1 µA), making it optimal for space- and reliability-critical automotive and industrial designs despite its 250 mW limit.
Availability
BZT52C39LP-7B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and medical wearable battery monitoring systems requiring stable component supply and long-term lifecycle support.
Supply support for BZT52C39LP-7B 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 BZT52CxxLP series belongs to Diodes' AEC-Q101-qualified Zener diode portfolio, designed specifically for precision voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZT52C39LP-7B has a nominal zener voltage of 39 V with a guaranteed range of 37.0–41.0 V at 2 mA test current. Breakdown begins within this band; operation above 41.0 V risks exceeding absolute maximum ratings and thermal runaway under sustained power.
Is this device suitable for use in automotive powertrain applications?
Yes - the BZT52C39LP-7B is AEC-Q101 qualified and rated for –65 °C to +150 °C operation. Its DFN1006-2 package, NiPdAu terminations, and 250 mW power rating meet requirements for non-safety-critical powertrain subsystems like sensor signal conditioning and auxiliary supply monitoring.
How does the temperature coefficient affect voltage regulation accuracy?
With a +27.3 mV/°C temperature coefficient, the zener voltage increases by approximately 2.73 V over a 100 °C rise. For example, at 125 °C ambient, VZ shifts from 39 V to ~41.7 V - a design consideration for high-temperature environments requiring tight regulation tolerance.
Can this diode replace a through-hole 1N4763A in an existing design?
No - the 1N4763A is a 39 V, 1 W axial-leaded Zener in DO-41 package. The BZT52C39LP-7B delivers only 250 mW in a surface-mount DFN1006-2. Direct replacement requires verifying power dissipation, thermal layout, and PCB footprint compatibility; it is not a drop-in substitute.
BZT52C39LP-7B 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:
- ±5.13%
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1006-2
BZT52C39LP-7B FAQ
1.How can I place an order for BZT52C39LP-7B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C39LP-7B 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-7B reliable?
The price and inventory of BZT52C39LP-7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C39LP-7B is usually 5 days.
3.What payment methods are accepted for BZT52C39LP-7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C39LP-7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C39LP-7B?
BZT52C39LP-7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C39LP-7B 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-7B?
For technical support, including BZT52C39LP-7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C39LP-7B requirements.
6.How does Aetrix verify that BZT52C39LP-7B is sourced from the original manufacturer or authorized distributors?
All BZT52C39LP-7B 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-7B meets industry standards.
7.What is the process for return or replacement of BZT52C39LP-7B?
All BZT52C39LP-7B units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C39LP-7B, 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-7B part is unused and in its original packaging.
Return procedure for BZT52C39LP-7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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