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Nexperia USA Inc. BZT52H-B11-QX
- Part No.:
- BZT52H-B11-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B11-QX.pdf
- Description:
- DIODE ZENER 11V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
BZT52H-B11-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 11 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage regulation and reference applications.
For engineers reviewing the BZT52H-B11-QX datasheet, BZT52H-B11-QX pinout, BZT52H-B11-QX application, or BZT52H-B11-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse current, and automotive qualification status - critical for ECU power rail clamping, sensor biasing, and precision reference design.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a tightly controlled 10.80–11.20 V working voltage range at IZ = 5 mA, exhibiting low 70 Ω typical differential resistance and temperature coefficient of +0.1 mV/K - enabling stable voltage reference under varying load and ambient conditions.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 830 mW power handling at Tamb ≤ 25 °C and maintains junction temperature below 150 °C, supported by Rth(j-sp) = 150 K/W to solder point and Rth(j-a) = 330 K/W in free air.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.80–11.20 V at IZ = 5 mA - defines precise clamping threshold for 12 V system rails |
| Tolerance | ±2 % - ensures predictable regulation across production batches without post-assembly trimming |
| Differential Resistance (rdif) | 70 Ω max - limits output voltage shift under dynamic load changes in feedback networks |
| Reverse Current (IR) | 10 μA max at VR = 8.8 V - guarantees low leakage in high-impedance bias circuits |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact automotive modules |
| Junction Temperature (Tj) | −65 to +150 °C - enables deployment in under-hood ECUs and body control units |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD123F surface-mount plastic package: 2.5–2.7 mm length × 1.2–1.5 mm width × 0.9–1.0 mm height; cathode marked by bar; optimized for reflow soldering on standard FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and chassis applications per stress test requirements |
| ±2 % voltage tolerance | Reduces need for binning or external trimming in precision reference designs |
| 830 mW power rating | Supports higher-current Zener shunt regulation without derating in thermally constrained layouts |
| SOD123F footprint | Enables high-density PCB routing with 1.1 mm pad spacing and 2.8 mm occupied area |
| Low 70 Ω rdif | Maintains <±50 mV output variation across 1–10 mA load current range |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O pins and analog front-ends from transients on 12 V supply lines in engine control units. IC Role / Device Role / Timing Role: Zener clamping element placed between VCC and GND to limit overvoltage spikes to ≤11.2 V. Use Value: Prevents latch-up and oxide damage during load dump events while maintaining AEC-Q101 compliance. |
Use Scenario: Providing stable 11 V reference for RTD or thermistor signal conditioning in programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference divider networks and op-amp biasing. Use Value: Enables <±0.22 V regulation accuracy over −40 to +125 °C due to low temperature coefficient (+0.1 mV/K). |
| Consumer Power Adapter Feedback | Medical Device Voltage Monitoring |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Shunt regulator in optocoupler feedback loop to maintain ±2 % output voltage regulation. Use Value: Delivers consistent 11 V reference despite input ripple, supporting tight 5 V ±50 mV output tolerance. |
Use Scenario: Overvoltage detection circuit in portable infusion pump battery management systems. IC Role / Device Role / Timing Role: Threshold detector triggering shutdown when Li-ion pack voltage exceeds safe limit. Use Value: Provides repeatable 11.2 V trip point with <10 μA leakage, minimizing standby current drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-A11-Q | ±1 % tolerance (10.89–11.11 V), higher cost, tighter VZ spread | Better suited for metrology-grade references where <±0.1 V drift is unacceptable | Select when absolute voltage accuracy outweighs cost sensitivity and thermal drift is managed externally |
| BZT52H-C11-Q | ±5 % tolerance (10.4–11.6 V), lower cost, wider VZ distribution | Appropriate for non-critical clamping where margin >1 V is available | Choose for cost-driven consumer power supplies where 11.6 V worst-case clamp remains within IC absolute maximum ratings |
Compared with BZT52H-B11-QX, the ±1 % A-series offers tighter regulation at higher unit cost and reduced thermal stability margin, while the ±5 % C-series trades accuracy for cost efficiency in non-safety-critical clamping - making the B-series optimal for balanced automotive-grade performance and procurement scalability.
Availability
BZT52H-B11-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and medical device power monitoring requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52H-B11-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 consumer markets.
The BZT52H-Q series is part of Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and reference functions in harsh automotive environments - emphasizing thermal stability, low leakage, and repeatable breakdown behavior.
FAQ
What is the maximum reverse current for BZT52H-B11-QX at 8.8 V?
The maximum reverse current is 10 μA at VR = 8.8 V and Tj = 25 °C, measured per Table 8 in the datasheet. This low leakage ensures minimal error in high-impedance reference dividers and preserves battery life in always-on monitoring circuits.
Can BZT52H-B11-QX be used in place of a 12 V Zener diode?
No - its nominal Zener voltage is 11 V (10.80–11.20 V range), not 12 V. Substituting it for a true 12 V Zener would result in premature clamping and potential system malfunction. Use BZT52H-B12-Q for 12 V regulation.
What is the thermal resistance from junction to solder point?
Rth(j-sp) is 150 K/W when mounted on an FR4 PCB with single-sided copper and a 1 cm² cathode mounting pad, per Table 6. This value informs thermal design for sustained 830 mW operation in confined enclosures.
Is the SOD123F package lead-free and RoHS compliant?
Yes - the BZT52H-B11-QX uses lead-free terminations and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed in Nexperia's product compliance documentation and material declarations.
BZT52H-B11-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H-Q
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±1.82%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 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
BZT52H-B11-QX FAQ
1.How can I place an order for BZT52H-B11-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B11-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 BZT52H-B11-QX reliable?
The price and inventory of BZT52H-B11-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-B11-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B11-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B11-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B11-QX?
BZT52H-B11-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B11-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 BZT52H-B11-QX?
For technical support, including BZT52H-B11-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B11-QX requirements.
6.How does Aetrix verify that BZT52H-B11-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B11-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 BZT52H-B11-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B11-QX?
All BZT52H-B11-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B11-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 BZT52H-B11-QX part is unused and in its original packaging.
Return procedure for BZT52H-B11-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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