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Nexperia USA Inc. BZT52-C3V9J
- Part No.:
- BZT52-C3V9J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52-C3V9J.pdf
- Description:
- DIODE ZENER 3.9V 350MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,673
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Product details
Overview
BZT52-C3V9J from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 3.9 V nominal regulation at 5 mA, with 500 Ω max differential resistance and 3 μA reverse current at 1 V, used for low-power voltage reference and overvoltage clamping in consumer power rails.
For engineers reviewing the BZT52-C3V9J datasheet, BZT52-C3V9J pinout, BZT52-C3V9J application, or BZT52-C3V9J equivalent, this page delivers verified Zener voltage, thermal resistance, cathode/anode polarity, SOD123 footprint compatibility, and substitution guidance against industry-standard alternatives.
Technical Context
This Zener operates in reverse breakdown mode with a nominal 3.9 V regulation voltage at IZ = 5 mA, exhibiting a temperature coefficient of −3.5 to 0.0 mV/K across its operating range. Its low 500 Ω differential resistance ensures stable regulation under small-signal load variations.
The device is rated for 590 mW total power dissipation at Tamb ≤ 25 °C on a 1 cm² cathode pad, with junction-to-ambient thermal resistance of 210 K/W when mounted per standard FR4 layout. It supports non-repetitive peak reverse currents up to 6.0 A for 100 μs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage VZ | 3.7 V to 4.1 V at IZ = 5 mA - defines tight regulation window for 3.3 V rail monitoring and biasing |
| Differential resistance rdif | ≤ 500 Ω - limits output voltage shift under ±1 mA load change, critical for precision reference stability |
| Reverse current IR | ≤ 3 μA at VR = 1 V - ensures minimal leakage in standby mode for battery-powered circuits |
| Forward voltage VF | ≤ 0.9 V at IF = 10 mA - enables use as low-drop clamp or ESD protection path in series configuration |
| Total power dissipation Ptot | 590 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB copper |
| Junction temperature Tj | −55 °C to +150 °C - supports operation in industrial ambient environments without derating below −40 °C |
Pinout & Package
SOD123 surface-mount plastic package: 2-terminal, flat lead, cathode marked by bar; dimensions 3.75 mm × 1.7 mm × 1.3 mm (L × W × H), 1.0 mm lead pitch, 0.7 mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during Zener conduction |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased path for voltage clamping or reference generation |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective regulation where tight accuracy is not required, e.g., non-critical supply supervision |
| Low 500 Ω differential resistance | Maintains <±20 mV output shift across 1 mA load variation, suitable for analog sensor bias networks |
| 3 μA max reverse leakage at 1 V | Minimizes quiescent current draw in always-on monitoring circuits, extending battery life in portable devices |
| SOD123 footprint compatibility | Matches IPC-7351B standard land pattern (4.18 mm × 1.11 mm pad), enabling drop-in replacement in high-density layouts |
| 150 °C max junction temperature | Supports uninterrupted operation in enclosed enclosures with ambient up to +85 °C without thermal shutdown |
Applications
| Power Rail Clamping | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Protecting 3.3 V I/O pins from transient overvoltage events exceeding 4.5 V. IC Role / Device Role / Timing Role: Zener acts as shunt clamp, conducting excess current above 3.9 V to ground before downstream logic is damaged. Use Value: Limits voltage excursion to ≤4.1 V with <100 ns response, preventing latch-up in 3.3 V CMOS interfaces. |
Use Scenario: Generating a stable reset threshold for an ARM Cortex-M0 microcontroller powered from a 3.3 V LDO. IC Role / Device Role / Timing Role: Provides precise 3.9 V reference to comparator input that triggers reset assertion when supply drops below 3.7 V. Use Value: Delivers ±5 % trip-point accuracy over −40 °C to +85 °C, eliminating need for external trimming resistors. |
| Low-Power Sensor Biasing | USB Port Overvoltage Protection |
|
Use Scenario: Supplying bias current to a thermistor-based temperature sensing circuit in a wearable health monitor. IC Role / Device Role / Timing Role: Functions as two-terminal voltage reference, sourcing 5 mA to establish fixed 3.9 V node for Wheatstone bridge excitation. Use Value: Maintains <±15 mV drift over 0–70 °C due to low temperature coefficient, ensuring ±0.5 °C measurement accuracy. |
Use Scenario: Safeguarding USB 2.0 data lines against accidental 5 V-to-3.3 V misconnection or ESD-induced surges. IC Role / Device Role / Timing Role: Placed between D+ and ground to clamp fast transients while presenting <1 pF capacitance to signal path. Use Value: Adds <0.5 pF parasitic capacitance at 0 V bias, preserving USB full-speed signal integrity up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5227BLT1G | 3.6 V nominal Zener, ±5 %, 1000 Ω rdif, SOD-123 package | Lower regulation voltage; higher dynamic impedance reduces load regulation performance | Select when 3.6 V threshold is required and tighter voltage control is not critical |
| Vishay NZ9F3V9ST5G | 3.9 V nominal Zener, ±2 %, 300 Ω rdif, SOD-923 package (1.0 × 0.6 mm) | Tighter tolerance and lower impedance, but smaller 0201-compatible footprint requires re-layout | Choose for higher-precision references where board space allows miniaturized packaging |
Compared with BZT52-C3V9J, MMBZ5227BLT1G trades regulation accuracy for broader availability, while NZ9F3V9ST5G improves precision and dynamic response at the cost of soldering complexity and reduced thermal mass.
Availability
BZT52-C3V9J is available at Aetrix Electronics and suitable for power rail clamping, microcontroller reset supervision, and low-power sensor biasing requiring stable component supply with traceable lot control and full RoHS/REACH compliance.
Supply support for BZT52-C3V9J 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
BZT52-C3V9J belongs to the BZT52 series of general-purpose Zener diodes designed for cost-sensitive voltage regulation and protection in space-constrained surface-mount applications.
FAQ
What is the maximum continuous reverse current the BZT52-C3V9J can handle at 25 °C ambient?
The device is rated for 590 mW total power dissipation at Tamb ≤ 25 °C with a 1 cm² cathode pad. At 3.9 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 151 mA (590 mW ÷ 3.9 V), assuming no additional thermal resistance beyond specified Rth(j-sp) = 55 K/W.
Does the BZT52-C3V9J meet automotive qualification standards?
No. Per Nexperia's revision history (Rev. 2, October 2025), C-series BZT52 devices are explicitly designated as non-automotive qualified. For automotive applications, Nexperia offers separate −Q qualified variants such as BZT52-C3V9J-Q, which undergo AEC-Q101 stress testing and PPAP documentation.
How does the marking code 'C6' correlate to the BZT52-C3V9J part number?
Per Table 4 of the datasheet, 'C6' is the top-side laser marking code for BZT52-C3V9J. The 'C' prefix indicates ±5 % tolerance, and '6' maps specifically to the 3.9 V nominal Zener voltage within the C-series lineup, distinguishing it from B-series (±2 %) and other voltage grades.
Can the BZT52-C3V9J be used in parallel for higher power dissipation?
No. Zener diodes exhibit negative temperature coefficients below ~5 V, causing thermal runaway when paralleled. The BZT52-C3V9J's −3.5 to 0.0 mV/K coefficient means one device will dominate conduction, overheating and failing. Use a single higher-power Zener or active regulation instead.
BZT52-C3V9J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5.1%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52-C3V9J FAQ
1.How can I place an order for BZT52-C3V9J through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52-C3V9J 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 BZT52-C3V9J reliable?
The price and inventory of BZT52-C3V9J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52-C3V9J is usually 5 days.
3.What payment methods are accepted for BZT52-C3V9J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52-C3V9J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52-C3V9J?
BZT52-C3V9J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52-C3V9J 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 BZT52-C3V9J?
For technical support, including BZT52-C3V9J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52-C3V9J requirements.
6.How does Aetrix verify that BZT52-C3V9J is sourced from the original manufacturer or authorized distributors?
All BZT52-C3V9J 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 BZT52-C3V9J meets industry standards.
7.What is the process for return or replacement of BZT52-C3V9J?
All BZT52-C3V9J units undergo pre-shipment inspection (PSI). If there is an issue with BZT52-C3V9J, 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 BZT52-C3V9J part is unused and in its original packaging.
Return procedure for BZT52-C3V9J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52-C3V9J Tags
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