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Nexperia USA Inc. BZT52H-A16X
- Part No.:
- BZT52H-A16X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A16X.pdf
- Description:
- DIODE ZENER 16V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
BZT52H-A16X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 16 V nominal breakdown voltage at IZ = 5 mA, with 830 mW total power dissipation and 170 Ω maximum differential resistance. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection nodes.
For engineers reviewing the BZT52H-A16X datasheet, BZT52H-A16X pinout, BZT52H-A16X application, or BZT52H-A16X equivalent, this page delivers verified specifications, validated SOD123F terminal mapping, confirmed thermal performance (Rth(j-a) = 330 K/W), and real-world selection guidance against functionally aligned alternatives.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with a tightly controlled 15.84 V to 16.16 V working voltage range at 5 mA test current. Its temperature coefficient of +11.2 mV/K (typical) ensures predictable drift under thermal variation, and its 75 pF capacitance at 0 V supports stable operation in DC and low-frequency regulation roles.
The device uses planar epitaxial construction for consistent parametric distribution across the ±1 % tolerance band. With 1.5 A non-repetitive peak reverse current capability (tp = 100 μs), it withstands transient surges without degradation when mounted on standard FR4 PCB with 1 cm² cathode pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 15.84 V to 16.16 V at IZ = 5 mA - defines precise regulation threshold for feedback or clamping |
| Tolerance | ±1 % - enables high-accuracy voltage references without post-calibration |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 board |
| Differential Resistance (rdif) | ≤170 Ω - determines output impedance and load regulation error in shunt configuration |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - ensures low conduction loss when used bidirectionally or in series with other components |
| Thermal Resistance (Rth(j-a)) | 330 K/W - quantifies self-heating impact under steady-state bias; requires derating above 25 °C ambient |
| Non-repetitive Peak Current (IZSM) | 1.5 A (tp = 100 μs) - supports transient overvoltage suppression without permanent damage |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline (3.6 mm × 1.7 mm × 1.0 mm), cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; reverse-bias anode-to-cathode voltage establishes VZ |
| 2 | Anode (A) | Typically grounded or tied to lower potential; completes current path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| High-precision voltage reference | ±1 % VZ tolerance enables <10 mV absolute error in 16 V regulation loops |
| Low thermal resistance to solder point | Rth(j-sp) = 150 K/W - improves heat transfer to PCB copper, supporting higher pulse duty cycles |
| Controlled temperature coefficient | +11.2 mV/K typical - allows predictable compensation in temperature-sensitive analog stages |
| Robust surge immunity | 40 W non-repetitive peak power (tp = 100 μs) - protects downstream circuitry from ESD or line transients |
| Standardized SMD footprint | SOD123F land pattern per Fig. 12 - ensures compatibility with automated reflow assembly and IPC-7351B design rules |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing output voltage of a 16 V switching regulator via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing accurate setpoint to TL431-like controller IC. Use Value: ±1 % VZ minimizes output voltage drift across temperature and line variations, maintaining ±0.16 V regulation accuracy. |
Use Scenario: Protecting 3.3 V GPIO pins from accidental 16 V rail exposure during hot-swap or fault conditions. IC Role / Device Role / Timing Role: Fast-acting clamp limiting pin voltage to safe levels before internal ESD structures activate. Use Value: 1.5 A surge rating absorbs 100 μs transients without failure, preserving signal integrity and IC reliability. |
| Low-Power Analog Sensor Biasing | Reference Voltage for ADC Input Scaling |
Use Scenario: Generating stable 16 V bias for photodiode transimpedance amplifier requiring low-noise, low-drift supply. IC Role / Device Role / Timing Role: Precision DC reference source replacing bulkier IC-based solutions in space-constrained modules. Use Value: 170 Ω rdif ensures minimal load-induced error (<1 mV) even with 50 μA sensor bias current variation. |
Use Scenario: Setting full-scale input range of a 12-bit SAR ADC measuring 0–16 V industrial signals. IC Role / Device Role / Timing Role: Fixed reference defining ADC's VREF input, directly scaling conversion resolution. Use Value: ±1 % tolerance yields ≤0.16 V absolute reference error, enabling <0.04 V measurement uncertainty at 12-bit resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C16 | ±5 % tolerance, 15.2–16.8 V range, 170 Ω rdif, same SOD123F package | Lower cost; acceptable where ±0.8 V regulation window suffices | Select for cost-sensitive consumer designs where tighter tolerance is unnecessary |
| MMSZ5245B | ±5 % tolerance, 15.0–17.0 V range, 190 Ω rdif, SOD-123 package (identical mechanical footprint) | Higher IR (100 nA max at 12 V vs. 5 μA for BZT52H-A16X), slightly lower surge rating | Choose when legacy MMSZ compatibility or distributor stock availability drives sourcing |
Compared with BZT52H-A16X, BZT52C16 trades precision for cost savings while retaining identical thermal and surge performance; MMSZ5245B offers cross-compatible packaging but sacrifices regulation accuracy and leakage control, making it suitable only where system-level calibration compensates for wider VZ spread.
Availability
BZT52H-A16X is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamps, and precision analog biasing requiring stable component supply and guaranteed ±1 % voltage accuracy.
Supply support for BZT52H-A16X 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 and industrial-grade components.
The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation in cost-sensitive, space-constrained applications where ±1 % to ±5 % tolerance bands meet system requirements.
FAQ
What is the maximum continuous reverse current for BZT52H-A16X at 25 °C ambient?
The device supports up to 250 mA forward current, but its continuous reverse (Zener) current is limited by power dissipation: at 25 °C ambient, Ptot = 830 mW implies IZ ≤ 52 mA (830 mW ÷ 16 V). Derating applies above 25 °C per Rth(j-a) = 330 K/W.
How does the +11.2 mV/K temperature coefficient affect regulation stability?
A +11.2 mV/K coefficient means VZ increases ~11.2 mV per °C rise in junction temperature. Over a 100 °C range (25–125 °C), this produces ~1.12 V shift - critical in uncooled applications. System-level compensation or thermal management is required for sub-0.1 % stability.
Can BZT52H-A16X replace BZX84-C16 in existing SOT-23 designs?
No - BZT52H-A16X uses SOD123F (3.6 mm × 1.7 mm), while BZX84-C16 uses SOT-23 (3.0 mm × 1.4 mm). Footprint, solder pad layout, and thermal mass differ significantly. Direct replacement requires PCB redesign and validation of thermal performance under load.
Is BZT52H-A16X qualified for automotive applications?
No - per Revision 7 (Jan 2023), the BZT52H series is explicitly designated non-automotive. Nexperia offers separate -Q qualified variants (e.g., BZT52H-Q series) with AEC-Q200 testing; BZT52H-A16X lacks automotive qualification and must not be used in safety-critical vehicle systems.
BZT52H-A16X 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
BZT52H-A16X FAQ
1.How can I place an order for BZT52H-A16X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A16X 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-A16X reliable?
The price and inventory of BZT52H-A16X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A16X is usually 5 days.
3.What payment methods are accepted for BZT52H-A16X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A16X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A16X?
BZT52H-A16X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A16X 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-A16X?
For technical support, including BZT52H-A16X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A16X requirements.
6.How does Aetrix verify that BZT52H-A16X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A16X 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-A16X meets industry standards.
7.What is the process for return or replacement of BZT52H-A16X?
All BZT52H-A16X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A16X, 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-A16X part is unused and in its original packaging.
Return procedure for BZT52H-A16X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A16X Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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