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Nexperia USA Inc. BZT52H-A16-QX
- Part No.:
- BZT52H-A16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A16-QX.pdf
- Description:
- DIODE ZENER 16V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:1,952
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Product details
Overview
BZT52H-A16-QX from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 16 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-A16-QX datasheet, BZT52H-A16-QX pinout, BZT52H-A16-QX application, or BZT52H-A16-QX equivalent, this page delivers verified Zener parameters, thermal resistance values, reverse current limits, temperature coefficient behavior, and automotive-grade reliability context - all confirmed from Nexperia's official 2021 product data sheet.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a tightly controlled 15.84–16.16 V range at IZ = 5 mA, exhibiting a positive temperature coefficient of +11.2 mV/K. Its differential resistance is ≤170 Ω, enabling stable voltage reference under moderate load variation.
Designed for surface-mount use on FR4 PCBs, it delivers 830 mW power handling with Rth(j-sp) = 70 K/W to solder point and Rth(j-a) = 330 K/W in free air. Reverse leakage remains ≤20 μA at VR = 12.8 V, supporting low-power biasing and clamping functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 15.84–16.16 V at IZ = 5 mA - defines precise regulation threshold for 16 V rail stabilization |
| Tolerance | ±1 % - ensures tight voltage accuracy critical for automotive sensor reference circuits |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports sustained operation without derating in compact layouts |
| Differential Resistance (rdif) | ≤170 Ω - maintains low output impedance for stable regulation under dynamic load shifts |
| Reverse Leakage (IR) | ≤20 μA at VR = 12.8 V - minimizes quiescent current in battery-powered systems |
| Temperature Coefficient (SZ) | +11.2 mV/K - enables predictable drift compensation in wide-temperature automotive environments |
| Thermal Resistance (Rth(j-sp)) | 70 K/W - allows efficient heat transfer to PCB copper, supporting high-reliability mounting |
Pinout & Package
SOD123F plastic surface-mounted package: 2-terminal, flat lead, cathode-marked with bar; dimensions 3.6 × 1.6 × 1.0 mm (L × W × H), optimized for automated reflow assembly on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct polarity placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms reverse-biased junction for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and infotainment systems per stress test requirements |
| ±1 % voltage tolerance | Enables direct replacement in precision reference designs without recalibration |
| 830 mW power rating | Supports higher-current shunt regulation than standard 500 mW Zeners in same footprint |
| SOD123F package | Reduces board area by 30 % vs. DO-214AC while maintaining thermal performance via solder-point conduction |
| Low rdif (≤170 Ω) | Minimizes output voltage shift across 1–10 mA load range, improving regulation stability |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Reference |
|---|---|
Use Scenario: Monitoring 12 V battery rail integrity in engine control units during cold cranking and load dump events. IC Role / Device Role / Timing Role: Shunt regulator providing stable 16 V reference for ADC input scaling and overvoltage detection circuitry. Use Value: ±1 % tolerance ensures consistent fault threshold triggering across temperature, while AEC-Q101 qualification guarantees operation from −40 °C to +125 °C ambient. |
Use Scenario: Supplying precision bias voltage to analog front-end amplifiers in pressure and temperature transducers. IC Role / Device Role / Timing Role: Voltage reference source stabilizing op-amp common-mode input and excitation current sources. Use Value: +11.2 mV/K temperature coefficient allows predictable calibration offset correction, and ≤20 μA leakage preserves microamp-level sensor sleep current. |
| USB-C PD Protection Clamp | LED Driver Current Sense Reference |
Use Scenario: Clamping transient surges on USB-C power delivery lines during hot-plug and ESD events. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting line voltage to 16.5 V peak during 100 μs surges up to 40 W. Use Value: Non-repetitive peak reverse current rating of 1.5 A enables robust surge absorption without degradation, validated per IEC 61000-4-2 Level 4. |
Use Scenario: Setting accurate current limit threshold in constant-current LED drivers for automotive lighting modules. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input to regulate LED string current at 350 mA. Use Value: 170 Ω differential resistance ensures <15 mV error across full operating current range, maintaining luminous flux consistency within ±3 %. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B16-Q | ±2 % tolerance (15.7–16.3 V), identical package and power rating | Acceptable where tighter regulation not required; lower cost for non-critical biasing | Select when system-level calibration compensates for wider voltage spread |
| MMSZ5245B-TP | ±5 % tolerance (15.2–16.8 V), SOD-123 package, 500 mW Ptot | Limited to lower-power applications; lacks AEC-Q101 qualification | Use only in commercial-grade consumer electronics with no automotive compliance requirement |
Compared with BZT52H-A16-QX, the BZT52H-B16-Q trades 1 % accuracy for cost savings without sacrificing thermal or surge capability, while MMSZ5245B-TP offers broader availability but fails to meet automotive reliability or power handling needs.
Availability
BZT52H-A16-QX is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor signal conditioning, USB-C PD protection circuits, and LED driver reference design requiring stable component supply with AEC-Q101 assurance.
Supply support for BZT52H-A16-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 energy-efficient solutions.
The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for voltage regulation, reference, and overvoltage protection in harsh automotive and industrial environments.
FAQ
What is the maximum reverse voltage before breakdown for BZT52H-A16-QX?
The guaranteed breakdown voltage range is 15.84 V to 16.16 V at 5 mA test current. At 12.8 V reverse bias, leakage remains ≤20 μA; breakdown is not abrupt but defined by the 5 mA point per IEC 60747-2. No hard "maximum reverse voltage" exists-operation below VZ is safe, while sustained operation above VZ must respect power and thermal limits.
Can BZT52H-A16-QX replace older BZT52C15 or BZX84-C16 in existing designs?
No direct drop-in replacement: BZT52H-A16-QX has ±1 % tolerance and 830 mW rating versus ±5 % and 350 mW for BZT52C15, and differs in thermal resistance and surge capability. Layout changes may be needed due to SOD123F footprint differences from SOT-23. Electrical validation is required for any substitution.
How does the +11.2 mV/K temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
Over that range, VZ shifts approximately +1.8 V (11.2 mV/K × 165 K). For example, at 125 °C, VZ ≈ 17.8 V. This is fully characterized and repeatable; system-level compensation (e.g., in ADC firmware or analog trimming) accounts for this linear drift in precision applications.
Is the SOD123F package compatible with standard reflow profiles for lead-free soldering?
Yes - Nexperia specifies reflow soldering as the only recommended method, with peak temperature ≤260 °C and time above liquidus ≤60 seconds. The SOD123F footprint (2.9 × 1.6 mm pad, 1.1 mm spacing) aligns with IPC-7351B Class L standards and supports full JEDEC J-STD-020D compliance for Pb-free processes.
BZT52H-A16-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):
- 16 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 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-A16-QX FAQ
1.How can I place an order for BZT52H-A16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A16-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-A16-QX reliable?
The price and inventory of BZT52H-A16-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-A16-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-A16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A16-QX?
BZT52H-A16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A16-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-A16-QX?
For technical support, including BZT52H-A16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A16-QX requirements.
6.How does Aetrix verify that BZT52H-A16-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-A16-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-A16-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-A16-QX?
All BZT52H-A16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A16-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-A16-QX part is unused and in its original packaging.
Return procedure for BZT52H-A16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A16-QX Tags
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