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Nexperia USA Inc. BZT52H-A11X
- Part No.:
- BZT52H-A11X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A11X.pdf
- Description:
- DIODE ZENER 11V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,677
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Product details
Overview
BZT52H-A11X from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD123F package, rated for 11 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and 70 Ω maximum differential resistance - used for precision voltage reference and overvoltage protection in low-power analog supply rails.
For engineers reviewing the BZT52H-A11X datasheet, BZT52H-A11X pinout, BZT52H-A11X application, or BZT52H-A11X equivalent, this page delivers verified Zener parameters, thermal resistance data (Rth(j-sp) = 70 K/W), cathode/anode terminal mapping, and real-world regulation use cases in industrial sensor interfaces and microcontroller reset circuits.
Technical Context
This device operates as a two-terminal reverse-biased silicon junction diode with tightly controlled Zener breakdown characteristics. Its ±1 % VZ tolerance and low temperature coefficient (SZ = +0.1 mV/K at IZ = 5 mA) enable stable reference generation across ambient temperatures from −65 °C to +150 °C.
The SOD123F package provides surface-mount compatibility with defined thermal path to solder point (Rth(j-sp) = 70 K/W), supporting reliable operation under pulsed reverse loads up to 2.5 A (100 μs, Tj = 25 °C) and continuous DC dissipation of 830 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.89 V to 11.11 V at IZ = 5 mA - ensures ±1 % regulation accuracy for 3.3 V/5 V rail monitoring and ADC reference stabilization. |
| Differential Resistance (rdif) | ≤ 70 Ω - minimizes output voltage shift under load current variation, critical for low-noise analog sensing nodes. |
| Reverse Current (IR) | ≤ 0.1 μA at VR = 8.8 V - guarantees high-impedance standby behavior in battery-backed circuits. |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous regulation in compact PCB layouts without forced cooling. |
| Thermal Resistance (Rth(j-sp)) | 70 K/W - enables predictable junction temperature rise when mounted on standard FR4 with 1 cm² cathode pad. |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - allows use as polarity-sensitive clamp in bidirectional signal protection schemes. |
| Junction Temperature (Tj) | −65 °C to +150 °C - qualified for extended industrial and outdoor embedded applications. |
Pinout & Package
SOD123F is a 2-pin surface-mount plastic package with flat leads, 3.4–3.6 mm length, 1.5–1.7 mm width, and 0.25–0.35 mm thickness. 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 - reverse bias required for Zener conduction. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for stable breakdown operation. |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct replacement of higher-cost references in non-automotive industrial control feedback loops. |
| Low thermal resistance to solder point (70 K/W) | Reduces thermal derating need in dense layouts - maintains regulation stability without heatsinking. |
| Non-repetitive peak reverse current (2.5 A) | Withstands ESD transients per IEC 61000-4-2 Level 4 when placed at board edge I/O protection points. |
| 150 °C max junction temperature rating | Supports deployment in enclosed enclosures with ambient temperatures up to +85 °C without performance loss. |
| Standard SOD123F footprint | Ensures drop-in compatibility with existing reflow processes and pick-and-place equipment. |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Stabilizing 11 V reference for 12-bit SAR ADC measuring 4–20 mA loop current via shunt resistor. IC Role / Device Role / Timing Role: Zener diode provides fixed 11 V reference voltage to ADC VREF pin, rejecting supply ripple and load-induced drift. Use Value: ±1 % VZ tolerance and 70 Ω rdif limit full-scale error to <0.25% FS, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Generating clean 11 V threshold for RC-based manual reset circuit on STM32F4xx MCU. IC Role / Device Role / Timing Role: Zener clamps capacitor voltage during power-up, ensuring reset pulse width exceeds 10 ms at 3.3 V VDD ramp rate. Use Value: Low IR (<0.1 μA) prevents premature discharge of timing capacitor; 830 mW Ptot handles surge during brown-out recovery. |
| USB-C Port Overvoltage Clamp | Programmable Logic Supply Monitor |
|
Use Scenario: Protecting USB-C CC line receiver IC against accidental 12 V adapter misconnection. IC Role / Device Role / Timing Role: Placed between CC pin and ground to clamp reverse surges above 11 V before damage occurs. Use Value: 2.5 A IZSM (100 μs) absorbs transient energy without degradation; SOD123F size fits tight 2.0 mm pitch routing. |
Use Scenario: Monitoring 12 V auxiliary rail for FPGA configuration sequencer using comparator input. IC Role / Device Role / Timing Role: Provides precise 11 V reference to comparator's inverting input, triggering fault flag if rail drops below 11.2 V. Use Value: SZ = +0.1 mV/K ensures <±0.5 V drift over −40 °C to +85 °C operating range - eliminates calibration recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B11 | ±2 % VZ tolerance (10.80–11.20 V); identical SOD123F package and thermal specs. | Acceptable where cost sensitivity outweighs 1 % reference accuracy - e.g., non-critical power-good detection. | Select when system-level calibration compensates for wider VZ spread and long-term stability is not required. |
| MMSZ5240B-TP | ±5 % VZ (10.45–11.55 V); SOD-123 package; 500 mW Ptot; higher rdif (100 Ω). | Lower power handling and looser tolerance restrict use to basic voltage limiting, not precision referencing. | Choose only for legacy designs where MMSZ5240B footprint compatibility is mandatory and 11 V accuracy is secondary. |
Compared with BZT52H-B11 and MMSZ5240B-TP, the BZT52H-A11X delivers superior regulation accuracy and thermal performance - making it optimal for applications requiring stable 11 V references under variable load and temperature, while the alternatives trade precision for cost or footprint continuity.
Availability
BZT52H-A11X is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, USB-C port protection, and FPGA supply monitoring requiring stable component supply and guaranteed ±1 % Zener voltage tolerance.
Supply support for BZT52H-A11X 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 manufacturing rooted in process technology leadership and automotive-grade quality systems.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in space-constrained industrial and consumer electronics - not automotive-qualified.
FAQ
What is the maximum continuous reverse current for BZT52H-A11X at 25 °C ambient?
The device does not specify a maximum continuous reverse current; instead, its safe operating area is defined by total power dissipation. At Tamb = 25 °C, Ptot = 830 mW limits IZ to approximately 75.5 mA (830 mW ÷ 11 V), assuming nominal VZ. Derating is required above 25 °C per Rth(j-a) = 330 K/W.
Can BZT52H-A11X be used in place of a 10 V Zener diode?
No - BZT52H-A11X is specified for 10.89–11.11 V breakdown at 5 mA and is not interchangeable with 10 V Zeners. Substituting it would raise reference or clamp voltage by ~1 V, potentially causing overvoltage stress on downstream components or incorrect trip thresholds in monitoring circuits.
Does the SOD123F package support hand-soldering?
Reflow soldering is the only recommended method per Nexperia documentation. Hand-soldering risks thermal damage due to localized heating exceeding 260 °C at the die attach; the SOD123F's small thermal mass and lead geometry make controlled iron-based soldering unreliable and not qualified for production use.
Is BZT52H-A11X suitable for automotive applications?
No - this part is explicitly non-automotive qualified per Revision 7 (January 2023) datasheet, which states "Products changed to non-automotive qualification" and directs users to Nexperia's -Q automotive series for AEC-Q101-compliant alternatives. Its qualification excludes automotive temperature cycling, humidity testing, and failure rate validation.
BZT52H-A11X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZT52H
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±1%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A11X FAQ
1.How can I place an order for BZT52H-A11X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A11X 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-A11X reliable?
The price and inventory of BZT52H-A11X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A11X is usually 5 days.
3.What payment methods are accepted for BZT52H-A11X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A11X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A11X?
BZT52H-A11X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A11X 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-A11X?
For technical support, including BZT52H-A11X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A11X requirements.
6.How does Aetrix verify that BZT52H-A11X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A11X 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-A11X meets industry standards.
7.What is the process for return or replacement of BZT52H-A11X?
All BZT52H-A11X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A11X, 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-A11X part is unused and in its original packaging.
Return procedure for BZT52H-A11X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A11X Tags
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