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Nexperia USA Inc. BZT5250H-B36-QX
- Part No.:
- BZT5250H-B36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B36-QX.pdf
- Description:
- DIODE ZENER 36V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,336
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Product details
Overview
BZT5250H-B36-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 36 V nominal Zener voltage at 50 µA test current, with ±2 % tolerance, 830 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It operates as a precision shunt reference in low-bias circuits such as battery-powered sensor signal conditioning.
For engineers reviewing the BZT5250H-B36-QX datasheet, BZT5250H-B36-QX pinout, BZT5250H-B36-QX application, or BZT5250H-B36-QX equivalent, key selection criteria include its 36 V Zener voltage tolerance, low 50 µA test current requirement, thermal resistance of 150 K/W (junction-to-solder point), SOD123F surface-mount footprint, and AEC-Q101 qualification status.
Technical Context
This Zener diode delivers stable 36 V regulation under reverse bias with differential resistance of 350 Ω at 5 mA and temperature coefficient of +0.05 mV/K, enabling predictable voltage reference behavior across ambient temperatures from −55 °C to +150 °C. Its low leakage current profile is optimized for fast switching and noise reduction per AN90031.
The device features a maximum forward voltage of 0.9 V at 10 mA and non-repetitive peak reverse power dissipation up to 40 W for 100 µs pulses, supporting transient suppression in regulated supply rails. Junction-to-ambient thermal resistance is 330 K/W in free air, dropping to 70 K/W when soldered to cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 35.3 V to 36.7 V at IZ = 50 µA - tight ±2 % tolerance enables accurate low-current reference design |
| Differential Resistance (rdiff) | 350 Ω max at IZ = 5 mA - defines regulation slope and output impedance in shunt configuration |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - limits conduction loss during forward-biased operation or polarity protection |
| Junction Temperature (Tj) | 150 °C max - defines upper thermal operating limit for reliability in automotive under-hood environments |
| Reverse Current (IR) | 0.05 µA max at VR = 27.3 V - ensures minimal quiescent current draw below regulation threshold |
| Thermal Resistance (Rth(j-sp)) | 150 K/W - quantifies junction-to-solder-point heat transfer efficiency for thermal layout planning |
Pinout & Package
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; carries reverse current during Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for voltage clamping |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces standby power in battery-critical applications like tire pressure sensors |
| AEC-Q101 qualification | Qualified for automotive use - meets stress-test requirements for discrete semiconductors in harsh environments |
| Optimized leakage profile | Intentional minor rise in leakage current - improves switching speed and reduces noise in feedback loops |
| Tight voltage tolerance | ±2 % (B-series) - enables precise voltage reference without post-production trimming |
| Small-form-factor SMD | SOD123F package - supports high-density PCB layouts and automated reflow assembly |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Voltage reference for analog front-end of cabin temperature/humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt Zener regulator providing stable 36 V bias to op-amp supply rails and ADC reference dividers. Use Value: AEC-Q101 qualification ensures reliability over −40 °C to +125 °C operating range; low 50 µA test current minimizes battery drain in always-on sensing nodes. |
Use Scenario: Precision voltage reference in handheld ECG signal conditioning circuitry powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener clamp establishing fixed reference for instrumentation amplifier gain-setting network. Use Value: ±2 % tolerance and 350 Ω dynamic resistance enable sub-1% reference stability; SOD123F footprint allows compact, lightweight PCB design. |
| Industrial IoT Edge Nodes | Smart Metering Subsystems |
|
Use Scenario: Regulated bias supply for LoRaWAN transceiver RF section in battery-operated environmental monitoring gateways. IC Role / Device Role / Timing Role: Zener-based shunt regulator stabilizing 3.3 V LDO input rail against battery voltage sag during transmission bursts. Use Value: 830 mW power rating accommodates short-duration surge loads; optimized leakage supports fast wake-up response without reference settling delay. |
Use Scenario: Overvoltage protection and reference stabilization in metrology ASIC power domain of residential electricity meters. IC Role / Device Role / Timing Role: Dual-role device acting as both 36 V clamp for transient suppression and precision reference for calibration DACs. Use Value: 40 W non-repetitive pulse rating handles lightning-induced surges; +0.05 mV/K tempco ensures <0.1 % drift over meter's 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52-C36 | ±5 % tolerance, no AEC-Q101 qualification, same SOD123F package and 36 V nominal rating | Targeted at industrial/commercial rather than automotive-grade designs | Select when cost sensitivity outweighs automotive qualification and tighter tolerance requirements |
| MMSZ5245B | 36 V nominal, ±5 %, SOD-123 package, 500 mW Ptot, not AEC-Q101 qualified | Limited to non-automotive consumer or computing applications due to lower power and qualification status | Choose only for legacy compatibility where 830 mW derating or AEC compliance is unnecessary |
Compared with BZT5250H-B36-QX, BZT52-C36 offers lower cost but sacrifices tolerance and automotive qualification, while MMSZ5245B provides footprint compatibility at reduced power and reliability assurance-making the BZT5250H-B36-QX optimal for safety-critical, low-quiescent, and thermally constrained automotive subsystems.
Availability
BZT5250H-B36-QX is available at Aetrix Electronics and suitable for automotive cabin electronics, portable medical devices, industrial IoT edge nodes, and smart metering subsystems requiring stable component supply with AEC-Q101 assurance and tight voltage tolerance.
Supply support for BZT5250H-B36-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 and energy-efficient technologies.
The BZT5250H-Q series belongs to Nexperia's automotive-grade Zener diode product line, designed specifically for low-current, high-stability voltage regulation in space-constrained, thermally demanding automotive and industrial applications.
FAQ
What is the Zener voltage tolerance for BZT5250H-B36-QX?
The BZT5250H-B36-QX has a ±2 % Zener voltage tolerance, meaning its specified 36 V nominal voltage falls between 35.3 V and 36.7 V at 50 µA test current. This tight tolerance is confirmed in Table 8 of the datasheet and applies to the 'B' series variant, distinguishing it from the ±5 % 'C' series counterparts.
Is BZT5250H-B36-QX suitable for automotive applications?
Yes - BZT5250H-B36-QX is qualified to AEC-Q101 standards and explicitly recommended for automotive use per Section 2 and Section 11 of the datasheet. Its guaranteed operation from −55 °C to +150 °C junction temperature and robust transient handling make it appropriate for engine control units, ADAS sensors, and infotainment power domains.
How does the 50 µA test current affect circuit design?
The 50 µA Zener test current enables ultra-low-power biasing in battery-sensitive applications. Designers must ensure minimum bias current ≥50 µA for regulation onset, and account for the 350 Ω dynamic resistance when calculating load regulation error. This low test point also implies higher rdiff than higher-current Zeners, affecting ripple rejection.
What is the thermal resistance from junction to solder point?
The junction-to-solder-point thermal resistance (Rth(j-sp)) is 150 K/W, measured with the cathode tab soldered to a 1 cm² copper pad on FR4 PCB. This value guides thermal pad sizing and layout - for example, doubling the copper area typically reduces Rth(j-sp) by ~15–20 %, improving long-term reliability under sustained 830 mW dissipation.
BZT5250H-B36-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):
- 36 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-B36-QX FAQ
1.How can I place an order for BZT5250H-B36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B36-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-B36-QX reliable?
The price and inventory of BZT5250H-B36-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-B36-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B36-QX?
BZT5250H-B36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B36-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-B36-QX?
For technical support, including BZT5250H-B36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B36-QX requirements.
6.How does Aetrix verify that BZT5250H-B36-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B36-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-B36-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B36-QX?
All BZT5250H-B36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B36-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-B36-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT5250H-B36-QX Tags
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