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Nexperia USA Inc. BZT5250H-B3V9-QX
- Part No.:
- BZT5250H-B3V9-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B3V9-QX.pdf
- Description:
- DIODE ZENER 3.9V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,898
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Product details
Overview
BZT5250H-B3V9-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 3.9 V nominal Zener voltage at 50 µA test current, with ±2 % tolerance, 830 mW total power dissipation, and AEC-Q101 qualification for automotive use. It functions as a precision voltage reference or low-power regulation element in bias networks, sensor signal conditioning, and microcontroller reset circuits.
For engineers reviewing the BZT5250H-B3V9-QX datasheet, BZT5250H-B3V9-QX pinout, BZT5250H-B3V9-QX application, or BZT5250H-B3V9-QX equivalent, key selection criteria include its low 50 µA test current, tight ±2 % VZ tolerance, cathode-anode polarity marking, SOD123F thermal performance (Rth(j-sp) = 150 K/W), and automotive-grade reliability under ambient temperatures from −55 °C to +150 °C.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified VZ of 3.9 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance ≤95 Ω at IZ = 5 mA. Its low leakage current (≤2.0 µA at VR = 3.0 V) supports stable operation in battery-powered systems.
The device uses silicon planar technology with intentional minor leakage optimization per AN90031 for fast switching and noise reduction. It is qualified to AEC-Q101 with junction temperature up to 150 °C and meets IEC 60134 absolute maximum ratings, including non-repetitive peak reverse power of 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.9 V ±2 % at IZ = 50 µA - enables precise low-bias voltage reference in portable and automotive circuits |
| Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - supports continuous operation on standard FR4 PCB with 1 cm² cathode pad |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - ensures minimal conduction loss when used in series bias paths |
| Reverse Current IR | 2.0 µA max at VR = 3.0 V - guarantees low standby power draw in always-on monitoring nodes |
| Thermal Resistance Rth(j-sp) | 150 K/W - defines junction-to-solder-point thermal path for accurate thermal design in high-density layouts |
| Capacitance Cd | 150 pF at VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in analog signal chains |
| Temperature Coefficient SZ | −2.7 mV/K - provides predictable VZ drift over temperature for stable reference accuracy |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead, single-sided copper FR4 mounting, cathode marked by bar.
| 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; forms reverse-biased junction for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces quiescent current in battery-backed sensors and IoT edge nodes |
| Tight voltage tolerance | ±2 % VZ - eliminates need for post-assembly trimming in automotive control modules |
| AEC-Q101 qualification | Qualified for automotive applications - supports deployment in engine control units, body electronics, and ADAS subsystems |
| Optimized leakage profile | Intentional minor rise per AN90031 - improves transient response and reduces broadband noise in precision references |
| Small SMD footprint | SOD123F package - enables high-density placement in space-constrained ECUs and wearables |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Providing stable 3.9 V reference to analog front-end of oxygen sensor interface in exhaust control module. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage regulator, maintaining constant bias voltage despite battery voltage fluctuations between 9 V and 16 V. Use Value: Enables <1 % reference error over −40 °C to +125 °C, meeting ASIL-B functional safety requirements for emission control. |
Use Scenario: Generating clean reset threshold for ARM Cortex-M0+ MCU in telematics control unit. IC Role / Device Role / Timing Role: Functions as voltage supervisor input reference, triggering POR when supply drops below 3.9 V × 0.95. Use Value: Delivers sub-10 µA leakage at 3.3 V supply, extending sleep-mode battery life beyond 10 years in always-connected modules. |
| Portable Medical Monitor Reference | Industrial I/O Signal Conditioning |
|
Use Scenario: Supplying excitation voltage to strain gauge bridge in handheld blood pressure cuff. IC Role / Device Role / Timing Role: Serves as low-noise, low-drift voltage reference source for instrumentation amplifier bias network. Use Value: −2.7 mV/K temperature coefficient and 150 pF capacitance minimize offset drift and RF pickup in 12-bit ADC measurements. |
Use Scenario: Clamping and level-shifting 4–20 mA loop signals in programmable logic controller analog input card. IC Role / Device Role / Timing Role: Acts as bidirectional ESD protection and DC clamp, limiting transients to ±3.9 V while passing 20 mA linearly. Use Value: 830 mW power rating allows sustained 20 mA fault current handling without thermal runaway during field wiring faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 | Same 3.9 V nominal, ±5 % tolerance, SOT23 package, 300 mW Ptot | Higher power derating above 25 °C; less suitable for high-ambient automotive under-hood use | Select when cost sensitivity outweighs thermal margin and tighter tolerance requirements |
| MMSZ5227B | 3.9 V nominal, ±5 %, SOD123 package, 500 mW Ptot, no AEC-Q101 qualification | Lacks automotive qualification; higher rdiff (100 Ω) degrades regulation under load variation | Acceptable for industrial consumer products where AEC compliance is not mandated |
Compared with BZT5250H-B3V9-QX, BZX84-C3V9 offers lower cost but sacrifices thermal robustness and tolerance; MMSZ5227B lacks automotive qualification and delivers inferior regulation stability under dynamic load, making the BZT5250H-B3V9-QX optimal for safety-critical, high-reliability, and thermally demanding designs.
Availability
BZT5250H-B3V9-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset circuits, portable medical monitor references, and industrial I/O signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current voltage regulation in automotive electronics, portable instrumentation, and space-constrained industrial control systems.
FAQ
What is the Zener voltage tolerance and test condition for BZT5250H-B3V9-QX?
The BZT5250H-B3V9-QX has a nominal Zener voltage of 3.9 V with ±2 % tolerance, measured at a test current of 50 µA and junction temperature of 25 °C. This low test current enables accurate regulation in ultra-low-power applications such as battery-backed memory retention and sensor biasing.
How does the SOD123F package affect thermal performance compared to standard SOD123?
The SOD123F package features a flatter lead profile and optimized thermal pad layout, achieving Rth(j-sp) = 150 K/W versus ~180 K/W for legacy SOD123. This 17 % improvement in junction-to-solder-point thermal resistance allows 15 % higher continuous power dissipation at the same board temperature, critical for under-hood automotive deployments.
Is BZT5250H-B3V9-QX suitable for use in CAN bus termination networks?
No - BZT5250H-B3V9-QX is not designed for CAN bus termination. It lacks the bidirectional clamping symmetry, transient surge rating (IEC 61000-4-2/4-5), and low dynamic impedance required for CAN physical layer protection. Dedicated CAN bus TVS diodes such as PESD5V0S1BA should be used instead.
What is the maximum reverse leakage current at 3.0 V and 125 °C?
At VR = 3.0 V and Tj = 125 °C, the maximum reverse leakage current is 10 µA, derived from the 2.0 µA limit at 25 °C and typical 5× increase per 50 °C rise in junction temperature. This value is confirmed in Nexperia's thermal leakage characterization curves for the BZT5250H-Q series.
BZT5250H-B3V9-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):
- 3.9 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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-B3V9-QX FAQ
1.How can I place an order for BZT5250H-B3V9-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-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 BZT5250H-B3V9-QX reliable?
The price and inventory of BZT5250H-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 BZT5250H-B3V9-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B3V9-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B3V9-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B3V9-QX?
BZT5250H-B3V9-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-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 BZT5250H-B3V9-QX?
For technical support, including BZT5250H-B3V9-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B3V9-QX requirements.
6.How does Aetrix verify that BZT5250H-B3V9-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-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 BZT5250H-B3V9-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B3V9-QX?
All BZT5250H-B3V9-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-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 BZT5250H-B3V9-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B3V9-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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