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Nexperia USA Inc. BZT52H-B3V9-QX
- Part No.:
- BZT52H-B3V9-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B3V9-QX.pdf
- Description:
- DIODE ZENER 3.9V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,962
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Product details
Overview
BZT52H-B3V9-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 3.9 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-B3V9-QX datasheet, BZT52H-B3V9-QX pinout, BZT52H-B3V9-QX application, or BZT52H-B3V9-QX equivalent, this part delivers stable 3.9 V regulation with low differential resistance (95 Ω), tight tolerance, and automotive-grade reliability in a compact surface-mount package.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its 3.9 V nominal Zener voltage is specified at IZ = 5 mA with a temperature coefficient of −3.5 to 0.0 mV/K and differential resistance ≤95 Ω.
Designed for automotive environments, it supports ambient temperatures from −65 °C to +150 °C, junction temperature up to 150 °C, and meets AEC-Q101 stress qualification for discrete semiconductors. Thermal resistance from junction to solder point is 70 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal at IZ = 5 mA; ±2 % tolerance ensures precise voltage clamping in feedback and reference circuits. |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C; enables robust operation in space-constrained automotive PCBs with standard FR4 mounting. |
| Differential Resistance (rdif) | ≤95 Ω at IZ = 5 mA; minimizes output voltage variation under dynamic load changes in regulation paths. |
| Reverse Current (IR) | ≤3 μA at VR = 1 V; ensures low leakage in standby and low-power monitoring functions. |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; supports bidirectional protection and polarity-aware circuit design. |
| Thermal Resistance (Rth(j-sp)) | 70 K/W to cathode solder point; facilitates thermal management in high-density layouts without heatsinking. |
| Operating Temperature | −65 °C to +150 °C ambient; validated for under-hood and powertrain control module deployment. |
Pinout & Package
SOD123F plastic surface-mount package: 2-lead, flat lead, small outline; dimensions 3.6 mm × 1.7 mm × 1.0 mm; cathode marked by bar on top surface.
| 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 bias path for reverse-biased operation in regulation circuits. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling. |
| ±2 % Zener voltage tolerance | Enables tighter closed-loop control in precision voltage references without post-manufacturing trimming. |
| 830 mW power rating | Supports higher current regulation (up to ~210 mA at 3.9 V) compared to standard 500 mW Zeners in same footprint. |
| SOD123F package | 0.55 mm lead pitch, 1.2 mm body height - compatible with standard reflow processes and automated placement. |
| Low thermal resistance (70 K/W) | Reduces junction temperature rise by >30 % vs. legacy SOD123, improving long-term reliability in thermally stressed zones. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC inputs monitoring door lock status and window position sensors. IC Role / Device Role / Timing Role: Zener diode provides stable 3.9 V reference to ADC voltage divider network, compensating for supply rail fluctuations. Use Value: Maintains <±0.5 LSB error across −40 °C to +125 °C ambient due to low tempco and AEC-Q101 stability. |
Use Scenario: Clamping and biasing analog front-end of 4–20 mA current loop transmitter for pressure transducers. IC Role / Device Role / Timing Role: Acts as shunt regulator for op-amp reference rail and overvoltage protector for input stage. Use Value: 95 Ω rdif limits reference drift to <12 mV over 0–10 mA load range, ensuring 0.1 % full-scale accuracy. |
| Automotive Infotainment Power Sequencing | Consumer Appliance Microcontroller Reset Circuit |
Use Scenario: Generating clean 3.9 V enable signal for DC-DC converter startup sequencing in head unit power tree. IC Role / Device Role / Timing Role: Zener-based voltage detector triggers supervisor IC when main 5 V rail reaches regulation threshold. Use Value: ±2 % tolerance ensures consistent turn-on timing across production lots, eliminating batch-dependent reset delays. |
Use Scenario: Providing brown-out detection threshold for MCU reset in smart washing machine control board. IC Role / Device Role / Timing Role: Forms voltage divider with resistor to feed reset supervisor IC; Zener defines trip point at 3.9 V. Use Value: 3 μA max reverse leakage at 1 V prevents false resets during low-voltage wake-up events in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C3V9-Q | ±5 % tolerance (vs. ±2 %); identical VZ, Ptot, and package. | Acceptable where cost sensitivity outweighs precision; higher VZ variation impacts ADC reference accuracy. | Select for non-critical biasing where ±5 % VZ drift is within system margin. |
| MMSZ4685T1G | 3.9 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified. | Limited to commercial/industrial use; insufficient power rating for sustained 3.9 V regulation above 125 mA. | Choose only for non-automotive designs with lower power demand and relaxed qualification requirements. |
Compared with BZT52H-B3V9-QX, the C-grade variant trades precision for cost in stable environments, while MMSZ4685T1G lacks automotive qualification and thermal capability-making the B-grade the sole option meeting both ±2 % tolerance and AEC-Q101 compliance in SOD123F.
Availability
BZT52H-B3V9-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, infotainment power sequencing, and consumer appliance reset circuits requiring stable component supply and AEC-Q101 assurance.
Supply support for BZT52H-B3V9-QX 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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The BZT52H-Q series targets automotive voltage regulation and reference needs, delivering AEC-Q101-compliant Zener diodes across 2.4–75 V with three precision grades in compact SMD packages.
FAQ
What is the maximum reverse current at 1 V for BZT52H-B3V9-QX?
The reverse current is ≤3 μA at VR = 1 V and Tj = 25 °C, per Table 8. This low leakage supports accurate biasing in high-impedance sensor interfaces and minimizes quiescent power in always-on circuits.
Can BZT52H-B3V9-QX replace a standard 1N4734A in an automotive design?
No-1N4734A is through-hole, 400 mW, and not AEC-Q101 qualified. BZT52H-B3V9-QX offers higher power (830 mW), SMD compatibility, and automotive qualification, but requires PCB layout adaptation and verification of thermal performance on FR4.
What is the Zener voltage temperature coefficient for this part?
The temperature coefficient ranges from −3.5 mV/K to 0.0 mV/K at IZ = 5 mA, as specified in Table 8. This negative-to-zero slope enables stable regulation across −40 °C to +125 °C in automotive ambient conditions.
Is the SOD123F package compatible with standard reflow profiles?
Yes-Nexperia specifies reflow soldering as the only recommended method. The SOD123F footprint (Fig. 12) supports JEDEC J-STD-020-compliant peak temperatures up to 260 °C, with thermal pad design optimized for 70 K/W junction-to-solder-point resistance.
BZT52H-B3V9-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±2.05%
- Power - Max:
- 375 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:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-B3V9-QX FAQ
1.How can I place an order for BZT52H-B3V9-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B3V9-QX 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 BZT52H-B3V9-QX reliable?
The price and inventory of BZT52H-B3V9-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B3V9-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B3V9-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B3V9-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B3V9-QX?
BZT52H-B3V9-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B3V9-QX 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 BZT52H-B3V9-QX?
For technical support, including BZT52H-B3V9-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B3V9-QX requirements.
6.How does Aetrix verify that BZT52H-B3V9-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B3V9-QX 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 BZT52H-B3V9-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B3V9-QX?
All BZT52H-B3V9-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B3V9-QX, 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 BZT52H-B3V9-QX part is unused and in its original packaging.
Return procedure for BZT52H-B3V9-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B3V9-QX Tags
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