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Nexperia USA Inc. BZT5250H-B3V3-QX
- Part No.:
- BZT5250H-B3V3-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B3V3-QX.pdf
- Description:
- DIODE ZENER 3.3V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:8,686
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Product details
Overview
BZT5250H-B3V3-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 3.3 V nominal regulation at 50 µA test current, with ±2 % tolerance, 830 mW total power dissipation, and AEC-Q101 qualification for automotive voltage reference and biasing functions.
For engineers reviewing the BZT5250H-B3V3-QX datasheet, BZT5250H-B3V3-QX pinout, BZT5250H-B3V3-QX application, or BZT5250H-B3V3-QX equivalent, this device serves as a precision low-power shunt regulator in battery-powered sensor nodes, automotive ECU voltage monitoring, and portable MCU reset circuitry where stable low-current bias is critical.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified 3.3 V nominal Zener voltage (VZ) at IZ = 50 µA, exhibiting 160 Ω typical differential resistance (rdiff) at IZ = 5 mA and a temperature coefficient of −3.5 mV/K. Its low test current enables minimal quiescent power draw in always-on circuits.
Designed for surface-mount use on FR4 PCBs, it delivers 375 mW power dissipation under standard footprint conditions and 830 mW with enhanced cathode pad thermal management. The SOD123F package supports reflow soldering only and features a cathode-marked bar for unambiguous polarity identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.23 V to 3.37 V at IZ = 50 µA - tight ±2 % tolerance ensures predictable clamping in low-bias references |
| Differential Resistance (rdiff) | 600 Ω max at IZ = 50 µA - defines voltage regulation stiffness under light load variation |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - enables reliable anode-cathode conduction during forward-biased protection events |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - sets maximum continuous power handling under thermally optimized layout |
| Reverse Current (IR) | 1.5 µA max at VR = 2.0 V - confirms low leakage below knee voltage for standby integrity |
| Junction Temperature (Tj) | 150 °C maximum - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F is a 2-lead surface-mount plastic package measuring 2.6 mm × 1.6 mm × 1.1 mm, with flat leads and cathode marked by a visible bar on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration establishes Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby current in battery-powered systems without sacrificing regulation accuracy |
| Tight voltage tolerance | ±2 % (B-series) - enables precise threshold setting in reset generators and analog comparators |
| AEC-Q101 qualification | Qualified per stress test standard for discrete semiconductors - supports deployment in automotive control modules |
| Optimized thermal pad layout | 830 mW rating achievable with 1 cm² cathode copper area - improves reliability in thermally constrained layouts |
| Small SMD footprint | SOD123F package (2.6 × 1.6 mm) - saves board space in compact consumer and automotive electronics |
Applications
| Automotive ECU Voltage Monitoring | Portable Sensor Node Biasing |
|---|---|
Use Scenario: Monitoring 5 V supply rail in engine control unit to detect undervoltage faults before microcontroller reset. IC Role / Device Role / Timing Role: Shunt regulator providing stable 3.3 V reference to comparator input for rail supervision. Use Value: ±2 % VZ tolerance ensures consistent trip point across temperature and unit-to-unit variation, reducing false resets. |
Use Scenario: Supplying bias current to MEMS pressure sensor in wireless tire pressure monitor with coin-cell battery. IC Role / Device Role / Timing Role: Low-quiescent Zener reference establishing sensor excitation voltage and ADC reference baseline. Use Value: 50 µA test current minimizes loading on 3 V battery, extending operational life beyond 5 years in sleep mode. |
| USB-C Port Overvoltage Protection | Industrial PLC Input Conditioning |
Use Scenario: Clamping transient surges on USB-C CC line during hot-plug events to protect Type-C controller IC. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing short-duration ESD pulses while maintaining signal integrity. Use Value: 375 mW pulse-rated dissipation handles IEC 61000-4-2 Level 4 (15 kV air) transients without degradation. |
Use Scenario: Providing isolated 3.3 V reference for 4–20 mA loop receiver in factory automation module. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing op-amp feedback network against supply ripple. Use Value: −3.5 mV/K temperature coefficient limits drift to <±15 mV over −40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V3 | ±5 % tolerance, SOT23 package, 300 mW Ptot, no AEC-Q101 qualification | Lower cost for non-automotive consumer use; less stable reference due to wider tolerance and higher rdiff | Select when automotive qualification and tight regulation are not required and board space allows SOT23 footprint. |
| MMSZ5226B | ±5 % tolerance, SOD123 package (not SOD123F), 500 mW Ptot, no AEC-Q101 | Higher thermal resistance (Rth(j-a) ≈ 400 K/W vs. 330 K/W), limiting power handling on same PCB layout | Choose only for legacy designs using standard SOD123; avoid in new automotive or high-reliability applications. |
Compared with BZX84-C3V3 and MMSZ5226B, the BZT5250H-B3V3-QX delivers tighter voltage control, higher power capability, and automotive-grade reliability-making it the preferred choice for safety-critical or long-lifecycle embedded systems requiring stable low-current regulation.
Availability
BZT5250H-B3V3-QX is available at Aetrix Electronics and suitable for automotive ECU voltage supervision, portable sensor biasing, and industrial 4–20 mA loop conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BZT5250H-B3V3-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 devices, with leadership in automotive-qualified components and advanced packaging.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-power voltage reference and regulation in automotive and industrial environments demanding precision, stability, and long-term reliability.
FAQ
What is the maximum reverse voltage this Zener can regulate at 3.3 V?
The BZT5250H-B3V3-QX is specified for nominal 3.3 V regulation at IZ = 50 µA, with guaranteed minimum/maximum Zener voltage of 3.23 V and 3.37 V respectively. It maintains regulation up to its absolute maximum reverse voltage limit of 3.0 V (VR), beyond which leakage rises sharply-operation above 3.0 V must remain within the 50 µA test current to ensure stable clamping.
Can this diode be used in forward-biased protection circuits?
Yes-the device exhibits a maximum forward voltage of 0.9 V at 10 mA, making it suitable for low-drop rectification or polarity protection in low-current paths. However, its primary design intent is reverse-biased Zener regulation; forward conduction should be limited to ≤200 mA peak per Absolute Maximum Ratings, and thermal derating applies above 25 °C ambient.
How does the SOD123F package differ from standard SOD123 in thermal performance?
SOD123F features a flatter lead profile and optimized thermal pad geometry, enabling 830 mW total power dissipation with a 1 cm² cathode copper area-versus 500 mW for standard SOD123 under identical conditions. This 66 % increase in thermal capacity stems from improved solder joint thermal conduction and reduced junction-to-solder-point resistance (Rth(j-sp) = 70 K/W).
Is the −3.5 mV/K temperature coefficient linear across the full operating range?
The −3.5 mV/K coefficient is specified as typical at Tj = 25 °C and applies over the −40 °C to +125 °C ambient range, with deviation <±0.2 mV/K. Measured data shows monotonic, near-linear drift: VZ shifts −11.6 mV from 25 °C to 125 °C, confirming predictable behavior for compensation in analog front-ends.
BZT5250H-B3V3-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT5250H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1.5 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
BZT5250H-B3V3-QX FAQ
1.How can I place an order for BZT5250H-B3V3-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B3V3-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 BZT5250H-B3V3-QX reliable?
The price and inventory of BZT5250H-B3V3-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT5250H-B3V3-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B3V3-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B3V3-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B3V3-QX?
BZT5250H-B3V3-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B3V3-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 BZT5250H-B3V3-QX?
For technical support, including BZT5250H-B3V3-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B3V3-QX requirements.
6.How does Aetrix verify that BZT5250H-B3V3-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B3V3-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 BZT5250H-B3V3-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B3V3-QX?
All BZT5250H-B3V3-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B3V3-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 BZT5250H-B3V3-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B3V3-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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