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Nexperia USA Inc. BZT52H-B15-QX
- Part No.:
- BZT52H-B15-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B15-QX.pdf
- Description:
- DIODE ZENER 15V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,735
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Product details
Overview
BZT52H-B15-QX from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 15 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-B15-QX datasheet, BZT52H-B15-QX pinout, BZT52H-B15-QX application, or BZT52H-B15-QX equivalent, this page delivers verified Zener parameters including VZ, IZ, rdif, temperature coefficient, and thermal resistance - all confirmed from Nexperia's official product data sheet Rev. 1 (2021).
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified 15.0 V ±2 % nominal Zener voltage at 5 mA test current, exhibiting 10.5 Ω typical differential resistance and a +9.2 mV/K temperature coefficient over 25–150 °C. It maintains stable regulation under transient surge conditions up to 40 W non-repetitive peak reverse power.
Designed for surface-mount use on FR4 PCBs with single-sided copper, its thermal performance is defined by Rth(j-a) = 330 K/W (free air) and Rth(j-sp) = 70 K/W (to cathode solder point), enabling reliable operation in ambient temperatures from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 14.7 V to 15.3 V at IZ = 5 mA - ensures precise 15 V reference within ±2 % tolerance for stable voltage clamping |
| Differential Resistance rdif | 10.5 Ω max at IZ = 5 mA - low impedance maintains tight regulation under load current variation |
| Temperature Coefficient SZ | +9.2 mV/K at IZ = 5 mA - positive drift enables predictable compensation in temperature-sensitive circuits |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C on 1 cm² cathode pad - defines maximum continuous DC power handling in standard layout |
| Reverse Current IR | ≤ 0.05 μA at VR = 12 V - ultra-low leakage preserves accuracy in high-impedance bias networks |
| Forward Voltage VF | ≤ 0.9 V at IF = 10 mA - supports bidirectional protection or dual-use as clamp/rectifier in low-voltage paths |
| Junction Temperature Tj | 150 °C maximum - enables operation in under-hood automotive environments without derating |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.6 mm × 1.2 mm body, 0.7 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity mark aligns with PCB silkscreen bar for automated optical inspection |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing per JESD22 standards |
| ±2 % VZ tolerance | Enables tighter system-level voltage margining than ±5 % variants, reducing need for post-production trimming |
| 830 mW power rating | Supports higher current regulation (up to ~55 mA at 15 V) without external heatsinking on standard FR4 |
| Low 10.5 Ω rdif | Minimizes output voltage shift under dynamic load changes - critical for precision analog reference rails |
| +9.2 mV/K SZ | Allows predictable thermal compensation when paired with negative-coefficient components in voltage references |
Applications
| Automotive ECU Power Rail Clamping | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Protecting 15 V supply lines in engine control units against load dump transients up to 40 V. IC Role / Device Role / Timing Role: Zener clamping element placed between rail and ground to shunt excess energy during ISO 7637-2 pulse 5a events. Use Value: Withstands 2.0 A non-repetitive surge (IZSM) and dissipates 40 W peak, preventing downstream regulator failure. |
Use Scenario: Providing stable 15 V reference for 24-bit ADC biasing in programmable logic controller analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference source for DAC/ADC reference buffers requiring <0.1 % long-term stability. Use Value: ±2 % initial tolerance and +9.2 mV/K temperature coefficient enable <±0.3 % total error across –40 to +125 °C operating range. |
| Telecom Line Interface Protection | Consumer Power Supply Feedback |
Use Scenario: Overvoltage protection on 12–15 V DC power inputs of base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device in series with TVS diode, absorbing sustained overvoltage beyond TVS clamping level. Use Value: 830 mW continuous rating sustains 55 mA clamping current indefinitely, extending protection duty cycle beyond single-pulse TVS limits. |
Use Scenario: Secondary-side feedback reference in isolated 15 V flyback converters for smart home hubs. IC Role / Device Role / Timing Role: Zener-based optocoupler bias reference setting output voltage via TL431-like feedback loop. Use Value: Low 10.5 Ω rdif ensures <0.1 V output deviation across 1–10 mA feedback current range, improving load regulation to ±0.5 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C15-Q | ±5 % VZ tolerance (13.8–15.6 V), higher 15 μA IR at 12 V | Acceptable where cost sensitivity outweighs precision; less suitable for high-accuracy references | Select when budget constraints dominate and system-level calibration compensates for wider VZ spread |
| MMSZ5245B-TP | ±5 % VZ, SOD-123 package, 500 mW rating, no AEC-Q101 qualification | Limited to commercial-grade applications; unsuitable for automotive due to unqualified reliability | Choose only for non-automotive consumer designs where AEC-Q101 is not required and power demand ≤500 mW |
Compared with BZT52H-B15-QX, the C15-Q variant trades precision for cost in non-critical regulation, while MMSZ5245B-TP lacks automotive qualification and thermal robustness - making the BZT52H-B15-QX the sole choice for AEC-Q101-compliant 15 V reference designs demanding ±2 % accuracy and 830 mW capability.
Availability
BZT52H-B15-QX is available at Aetrix Electronics and suitable for automotive ECU power rail clamping, industrial sensor reference voltage generation, and telecom line interface protection requiring stable component supply with full traceability and lifecycle continuity.
Supply support for BZT52H-B15-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 BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, reference, and clamping functions where precision, thermal stability, and long-term reliability are mandatory.
FAQ
What is the exact Zener voltage range for BZT52H-B15-QX at 5 mA?
The BZT52H-B15-QX has a guaranteed Zener voltage range of 14.7 V to 15.3 V at IZ = 5 mA, corresponding to its ±2 % tolerance specification. This is explicitly defined in Table 8 of the Nexperia datasheet Rev. 1 (2021), row "B15-Q", column "B" selection.
Can BZT52H-B15-QX replace BZT52C15-Q in an automotive design?
No - BZT52C15-Q has ±5 % tolerance (13.8–15.6 V), higher leakage (15 μA vs. 0.05 μA), and lacks AEC-Q101 qualification. Substituting it would violate automotive functional safety requirements and degrade reference accuracy beyond system tolerances.
What is the maximum continuous forward current rating?
The absolute maximum forward current is 250 mA, per Table 5 (Limiting Values). However, forward conduction is not its intended operating mode; continuous forward bias above 10 mA risks exceeding 0.9 V VF and unnecessary power dissipation in regulation applications.
How does the +9.2 mV/K temperature coefficient affect circuit design?
The positive temperature coefficient means VZ increases by ~9.2 mV per °C rise in junction temperature. In precision references, this must be compensated - e.g., by pairing with a negative-TC component or using it in circuits where drift direction is beneficial, such as overvoltage trip points that tighten with temperature.
BZT52H-B15-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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-B15-QX FAQ
1.How can I place an order for BZT52H-B15-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B15-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-B15-QX reliable?
The price and inventory of BZT52H-B15-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-B15-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B15-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B15-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B15-QX?
BZT52H-B15-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B15-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-B15-QX?
For technical support, including BZT52H-B15-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B15-QX requirements.
6.How does Aetrix verify that BZT52H-B15-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B15-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-B15-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B15-QX?
All BZT52H-B15-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B15-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-B15-QX part is unused and in its original packaging.
Return procedure for BZT52H-B15-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-B15-QX Tags
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