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Nexperia USA Inc. BZT5250H-B27-QX
- Part No.:
- BZT5250H-B27-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT5250H-B27-QX.pdf
- Description:
- DIODE ZENER 27V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,172
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Product details
Overview
BZT5250H-B27-QX from Nexperia is a low-current Zener diode in SOD123F package, rated for 27 V nominal Zener voltage at 50 µA test current, with ±5 % tolerance, 830 mW total power dissipation, and AEC-Q101 qualification for automotive use. It functions as a precision voltage reference or low-power regulator in battery-powered sensor nodes and microcontroller reset circuits.
For engineers reviewing the BZT5250H-B27-QX datasheet, BZT5250H-B27-QX pinout, BZT5250H-B27-QX application, or BZT5250H-B27-QX equivalent, key selection criteria include its low 50 µA test current specification, intentional leakage optimization for noise reduction, thermal resistance of 150 K/W to solder point, 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 = 26.5–27.5 V at IZ = 50 µA, exhibiting a temperature coefficient of +0.05 mV/K and differential resistance of 300 Ω at IZ = 5 mA. Its design targets stable regulation under ultra-low bias conditions where conventional Zeners draw excessive quiescent current.
The device features intentionally elevated reverse leakage (≤1 µA at VR = 20.4 V) to improve switching transient response and reduce high-frequency noise-confirmed in AN90031-and is mounted on FR4 PCB with 1 cm² cathode pad for optimal thermal performance up to 830 mW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.5 V to 27.5 V at IZ = 50 µA - defines precise regulation threshold for low-bias monitoring circuits |
| Tolerance | ±5 % - enables cost-effective selection within E24 voltage range without trimming |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact automotive PCB layouts with defined copper area |
| Test Current (IZ) | 50 µA - allows stable regulation in micropower systems such as coin-cell IoT sensors |
| Thermal Resistance (Rth(j-sp)) | 150 K/W - ensures junction-to-solder-point heat transfer meets AEC-Q101 thermal cycling requirements |
| Reverse Leakage (IR) | ≤1 µA at VR = 20.4 V - optimized per AN90031 for fast transient suppression and reduced broadband noise |
| Junction Temperature (Tj) | 150 °C maximum - enables deployment in under-hood automotive modules 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 | 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 action |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current Zener operation | Specified at 50 µA - eliminates need for current-boosting resistors in sub-100 µA supply rails |
| AEC-Q101 qualification | Qualified for automotive applications - validated for temperature cycling, humidity, and mechanical shock per discrete semiconductor standard |
| Optimized leakage profile | Intentionally elevated IR per AN90031 - improves high-frequency noise rejection and turn-off speed in voltage-monitoring paths |
| SOD123F footprint compatibility | Standardized 2.6 mm × 1.6 mm outline - enables drop-in replacement in space-constrained designs using IPC-7351B-compliant land patterns |
| Stable temperature coefficient | +0.05 mV/K near 27 V - minimizes drift over −40 °C to +125 °C operating range in engine control units |
Applications
| Automotive Door Module Voltage Monitor | Industrial Sensor Node Reference |
|---|---|
Use Scenario: Monitoring 24 V battery rail in door control unit to detect undervoltage during cold-cranking. IC Role / Device Role / Timing Role: Zener reference for comparator input, providing stable 27 V threshold independent of load transients. Use Value: Low 50 µA test current avoids loading weak battery states; AEC-Q101 rating ensures reliability across 10,000+ thermal cycles. |
Use Scenario: Providing reference voltage for 16-bit ADC in battery-powered environmental sensor. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-current TL431, reducing system standby current by 85 %. Use Value: 27 V Zener voltage enables direct scaling of 0–30 V input range; ±5 % tolerance meets Class 1 measurement accuracy. |
| Microcontroller Reset Circuit | USB-C Power Negotiation Clamp |
Use Scenario: Generating clean reset signal when main 3.3 V supply drops below 2.7 V in automotive infotainment MCU. IC Role / Device Role / Timing Role: Reverse-biased Zener in voltage divider feeding supervisor IC, ensuring monotonic reset assertion. Use Value: Optimized leakage reduces false triggers during ESD events; 150 °C max junction temperature supports under-dash mounting. |
Use Scenario: Clamping CC line voltage during USB-C PD negotiation to prevent overvoltage damage to controller. IC Role / Device Role / Timing Role: Fast-response shunt clamp limiting CC pin to 27 V during fault conditions. Use Value: Intentional leakage improves clamping rise time to <100 ns; SOD123F size fits tight layout near USB-C connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT5250H-C27-Q | ±2 % tolerance vs. ±5 %; identical VZ range (25.65–28.35 V), same SOD123F package and AEC-Q101 rating | Used where tighter regulation stability is required in engine control feedback loops | Select for closed-loop analog control requiring <0.5 % reference error; otherwise B27-QX offers cost advantage |
| MMSZ5250B-TP | ±5 % tolerance, 27 V nominal, but rated only to 500 mW Ptot and not AEC-Q101 qualified | Limited to consumer-grade portable electronics due to lower power and non-automotive qualification | Acceptable for cost-sensitive non-automotive designs with <500 mW thermal budget and no qualification requirement |
Compared with BZT5250H-C27-Q, the BZT5250H-B27-QX trades tighter voltage tolerance for lower unit cost and identical thermal/automotive performance; versus MMSZ5250B-TP, it delivers 66 % higher power handling and certified automotive robustness at modest premium.
Availability
BZT5250H-B27-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZT5250H-B27-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The BZT5250H-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for low-current, low-noise voltage regulation in harsh-environment automotive subsystems and battery-constrained IoT endpoints.
FAQ
What is the maximum reverse voltage the BZT5250H-B27-QX can withstand before breakdown?
The BZT5250H-B27-QX has a nominal Zener voltage of 27 V, with guaranteed breakdown occurring between 26.5 V and 27.5 V at 50 µA test current. Its absolute maximum non-repetitive peak reverse voltage is limited by PZSM = 40 W for 100 µs pulses, translating to ~630 V transient clamping capability under defined surge conditions.
Does the BZT5250H-B27-QX require a series current-limiting resistor in all applications?
Yes - like all Zener diodes, it requires external current limiting to maintain stable operation within its 830 mW power envelope. For 27 V regulation at 5 mA, a minimum 1.5 kΩ resistor is needed from a 35 V source; design must account for worst-case VZ tolerance and ambient temperature derating per the thermal resistance data.
How does the "intentional minor rise of leakage current" benefit circuit performance?
Per AN90031, the controlled increase in reverse leakage improves high-frequency noise immunity and reduces turn-off delay during transient events. This makes the device especially effective in voltage-monitoring comparators and reset generators where fast, jitter-free threshold detection is critical - verified by reduced ringing in oscilloscope waveforms during step-load tests.
Can the BZT5250H-B27-QX be used in place of a 24 V Zener diode?
No - its specified VZ range (26.5–27.5 V) is distinct from 24 V Zeners (e.g., BZT5250H-B24-Q: 23.5–24.5 V). Substituting would shift regulation threshold by >10 %, potentially causing undervoltage lockout failures or incorrect sensor scaling. Always match nominal voltage and tolerance band to the reference design requirement.
BZT5250H-B27-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):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 20.4 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-B27-QX FAQ
1.How can I place an order for BZT5250H-B27-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT5250H-B27-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-B27-QX reliable?
The price and inventory of BZT5250H-B27-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-B27-QX is usually 5 days.
3.What payment methods are accepted for BZT5250H-B27-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT5250H-B27-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT5250H-B27-QX?
BZT5250H-B27-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT5250H-B27-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-B27-QX?
For technical support, including BZT5250H-B27-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT5250H-B27-QX requirements.
6.How does Aetrix verify that BZT5250H-B27-QX is sourced from the original manufacturer or authorized distributors?
All BZT5250H-B27-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-B27-QX meets industry standards.
7.What is the process for return or replacement of BZT5250H-B27-QX?
All BZT5250H-B27-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT5250H-B27-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-B27-QX part is unused and in its original packaging.
Return procedure for BZT5250H-B27-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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