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Nexperia USA Inc. BZT5250H-B9V1-QX
- Part No.:
- BZT5250H-B9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B9V1-QX.pdf
- Description:
- DIODE ZENER 9.1V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,055
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Product details
Overview
BZT5250H-B9V1-QX from Nexperia is a low-current Zener diode in SOD123F package, designed for precision voltage regulation at 9.1 V nominal with ±2 % tolerance, specified at 50 µA test current, and qualified to AEC-Q101 for automotive power rail clamping and biasing.
For engineers reviewing the BZT5250H-B9V1-QX datasheet, BZT5250H-B9V1-QX pinout, BZT5250H-B9V1-QX application, or BZT5250H-B9V1-QX equivalent, this device serves as a stable, low-leakage reference in battery-powered sensor nodes, automotive ECU voltage supervisors, and portable instrument front-end protection circuits.
Technical Context
This Zener operates in reverse breakdown with a nominal 9.1 V regulation voltage at IZ = 50 µA, exhibiting a temperature coefficient of +3.8 mV/K and differential resistance of ≤100 Ω at IZ = 5 mA. Its low 50 µA test current enables ultra-low quiescent current design in always-on subsystems.
The device features intentional minor leakage optimization per AN90031 for fast transient response and reduced noise in feedback paths, and is rated for 830 mW total power dissipation on FR4 PCB with 1 cm² cathode pad - supporting robust thermal performance in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, ±2 % tolerance at IZ = 50 µA - ensures tight regulation in low-power reference rails |
| Differential Resistance (rdiff) | ≤100 Ω at IZ = 5 mA - maintains stable output under small load variations |
| Temperature Coefficient (SZ) | +3.8 mV/K - predictable positive drift supports compensation in wide-temperature automotive environments |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - enables reliable anode-cathode polarity verification during board test |
| Reverse Current (IR) | ≤0.1 µA at VR = 7.3 V - minimizes standby power loss in battery-backed circuits |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C with 1 cm² cathode pad - supports continuous operation in thermally constrained SMT layouts |
| Junction Temperature (Tj) | 150 °C maximum - enables deployment in under-hood automotive zones without derating |
Pinout & Package
SOD123F surface-mount plastic package: 2.6 mm × 1.6 mm × 1.1 mm body, flat lead profile, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to regulated voltage node; marking bar identifies this terminal - critical for correct orientation in high-reliability automotive PCB assembly |
| 2 (A) | Anode | Connected to ground or lower-potential rail; forms reverse-biased junction enabling Zener breakdown at 9.1 V |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power domains |
| Low 50 µA test current | Enables regulation in microamp-level standby circuits such as CAN transceiver bias rails |
| Optimized leakage profile | Intentional minor IR rise per AN90031 improves switching speed and reduces noise in feedback loops |
| ±2 % voltage tolerance | Supports precise threshold detection in battery voltage monitors and overvoltage protectors |
| SOD123F footprint | Compatible with standard reflow soldering; occupies <2.5 mm² area for space-constrained modules |
Applications
| Automotive ECU Voltage Supervisor | Portable Gas Sensor Bias Rail |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control unit to detect undervoltage/overvoltage faults before MCU reset. IC Role / Device Role / Timing Role: Zener reference element in comparator input stage, providing stable 9.1 V threshold against which battery voltage is compared. Use Value: Tight ±2 % tolerance ensures fault detection within 0.18 V margin; AEC-Q101 rating guarantees operation across −40 °C to +125 °C ambient. |
Use Scenario: Supplying stable bias to electrochemical gas sensor electrodes in handheld air quality meters. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing fixed 9.1 V reference for analog front-end amplifier biasing. Use Value: 50 µA test current minimizes drain on coin-cell battery; ≤0.1 µA leakage at 7.3 V preserves >10-year shelf life. |
| Industrial PLC Input Protection | Medical Wearable Power Sequencing |
Use Scenario: Clamping transient surges on 24 V digital input channels of programmable logic controllers exposed to inductive load switching. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing short-duration spikes while limiting voltage to 9.1 V + VF of series diode. Use Value: Optimized leakage enables rapid recovery post-surge; 830 mW Ptot handles 40 W non-repetitive peaks per IEC 61000-4-5. |
Use Scenario: Generating clean enable signal for LDO sequencing in battery-powered ECG patch with multi-rail power architecture. IC Role / Device Role / Timing Role: Precision 9.1 V reference feeding comparator that triggers next-stage regulator turn-on after primary rail stabilization. Use Value: +3.8 mV/K temperature coefficient allows predictable offset calibration across body-worn operating range (−10 °C to +50 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 | Same 9.1 V nominal, ±5 % tolerance, SOT23 package, 350 mW Ptot | Higher power dissipation derating required above 70 °C ambient; no AEC-Q101 qualification | Select when cost sensitivity outweighs automotive reliability requirements and board space permits larger SOT23 footprint |
| MMSZ5240B | 9.1 V nominal, ±5 % tolerance, SOD123 package, 500 mW Ptot, 100 nA IR at 7.3 V | Lower leakage but no intentional fast-switching leakage optimization; not AEC-Q101 qualified | Prefer for ultra-low-power IoT sensors where leakage <100 nA is mandatory and automotive qualification is unnecessary |
Compared with BZT5250H-B9V1-QX, BZX84-C9V1 offers lower cost but sacrifices automotive qualification and thermal headroom, while MMSZ5240B provides superior leakage performance at the expense of transient response and AEC compliance - making the BZT5250H-B9V1-QX optimal for safety-critical automotive voltage supervision where precision, speed, and qualification are jointly required.
Availability
BZT5250H-B9V1-QX is available at Aetrix Electronics and suitable for automotive ECUs, portable medical sensors, industrial PLC inputs, and battery-powered instrumentation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT5250H-B9V1-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 advanced packaging.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, high-stability voltage reference and clamping in automotive and industrial edge electronics.
FAQ
What is the maximum reverse voltage this Zener can sustain before breakdown?
The BZT5250H-B9V1-QX has a nominal Zener voltage of 9.1 V with ±2 % tolerance, meaning breakdown occurs between 8.92 V and 9.28 V at IZ = 50 µA. Its absolute maximum reverse voltage is not defined - operation beyond VZ in breakdown is intended, but exceeding the 830 mW power limit or 150 °C junction temperature will cause permanent damage.
Is this device suitable for use in a 12 V automotive system with load dump transients?
Yes - the BZT5250H-B9V1-QX is AEC-Q101 qualified and rated for 40 W non-repetitive peak reverse power at 100 µs pulse width. When used with appropriate series impedance, it clamps transients to ~9.1 V + forward drop of companion diode, protecting downstream 12 V rail circuitry per ISO 7637-2 requirements.
How does the "intentional minor rise of leakage current" affect circuit performance?
Per AN90031, the controlled increase in leakage improves dynamic response by reducing minority-carrier lifetime, enabling faster turn-on/turn-off during voltage transients and lowering broadband noise in feedback paths - beneficial in precision analog monitoring and fast-switching regulator references.
Can this Zener be used in parallel for higher power handling?
No - Zener diodes exhibit manufacturing spread in VZ, causing current hogging if paralleled. The BZT5250H-B9V1-QX must be used individually. For higher power, select a single higher-rated part like BZT5250H-C9V1-Q (same VZ, wider tolerance) or implement external current-sharing resistors - though this degrades regulation accuracy.
BZT5250H-B9V1-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):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.9 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-B9V1-QX FAQ
1.How can I place an order for BZT5250H-B9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B9V1-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-B9V1-QX reliable?
The price and inventory of BZT5250H-B9V1-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-B9V1-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B9V1-QX?
BZT5250H-B9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B9V1-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-B9V1-QX?
For technical support, including BZT5250H-B9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B9V1-QX requirements.
6.How does Aetrix verify that BZT5250H-B9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B9V1-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-B9V1-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B9V1-QX?
All BZT5250H-B9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B9V1-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-B9V1-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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