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Nexperia USA Inc. BZT52H-B16-QX
- Part No.:
- BZT52H-B16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-B16-QX.pdf
- Description:
- DIODE ZENER 16V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:9,321
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Product details
Overview
BZT52H-B16-QX from Nexperia is a ±2 % 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-B16-QX datasheet, BZT52H-B16-QX pinout, BZT52H-B16-QX application, or BZT52H-B16-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 Rev. 1 product data sheet.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified VZ = 15.7–16.3 V at IZ = 5 mA, differential resistance rdif ≤ 170 Ω, and temperature coefficient SZ = +11.2 mV/K (min) to +14.0 mV/K (max), enabling stable voltage reference under varying thermal conditions.
It supports non-repetitive peak reverse current IZSM = 1.5 A (tp = 100 μs), junction-to-ambient thermal resistance Rth(j-a) = 330 K/W (free air), and junction-to-solder-point Rth(j-sp) = 70 K/W - critical for thermal design in compact automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 15.7–16.3 V at IZ = 5 mA - defines precise regulation point for 16 V rail stabilization |
| Tolerance | ±2 % - tighter than standard ±5 % Zeners, reducing reference uncertainty in feedback loops |
| Total Power Dissipation Ptot | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on FR4 PCB with 1 cm² cathode pad |
| Differential Resistance rdif | ≤ 170 Ω - determines output impedance and load regulation sensitivity in shunt regulator circuits |
| Reverse Current IR | ≤ 20 μA at VR = 12.2 V - ensures low leakage below breakdown, critical for battery-powered standby circuits |
| Temperature Coefficient SZ | +11.2 to +14.0 mV/K - positive drift enables predictable compensation in temperature-sensitive references |
| Junction Temperature Range | −65 to +150 °C - supports operation across full automotive ambient range without derating |
Pinout & Package
SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline (3.6 × 1.6 mm footprint), cathode marked by bar on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use per stress test requirements - eliminates need for additional qualification testing in Tier-1 designs |
| ±2 % VZ tolerance | Reduces variation in feedback divider networks, improving system-level voltage accuracy without trimming |
| 830 mW power rating | Enables higher-current shunt regulation (up to ~52 mA at 16 V) compared to 500 mW SOD-123 variants |
| Low thermal resistance Rth(j-sp) | 70 K/W to solder point - allows efficient heat transfer to copper pour, supporting sustained operation near Ptot limit |
| 1.5 A non-repetitive surge rating | Withstands transient overvoltage events (e.g., load dump) when used with series current-limiting resistor |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Reference Supply |
|---|---|
Use Scenario: Monitoring 12 V battery rail integrity in engine control units under cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: Shunt voltage reference for comparator-based undervoltage/overvoltage detection circuit. Use Value: ±2 % VZ tolerance and AEC-Q101 qualification ensure reliable trip-point stability across −40 to +125 °C ambient. |
Use Scenario: Providing stable 16 V bias to precision analog front-end of pressure transducer signal conditioning. IC Role / Device Role / Timing Role: Low-drift Zener reference replacing higher-cost bandgap ICs in cost-sensitive industrial sensors. Use Value: +11.2 to +14.0 mV/K temperature coefficient enables predictable offset correction in calibration algorithms. |
| LED Driver Feedback Clamp | USB-C PD Port Protection |
Use Scenario: Clamping feedback voltage in constant-current LED driver to prevent overvoltage during open-load fault. IC Role / Device Role / Timing Role: Fast-acting shunt limiter activated when output exceeds 16 V threshold. Use Value: 1.5 A non-repetitive surge rating absorbs short-duration transients without degradation. |
Use Scenario: Overvoltage protection clamp on USB-C power delivery input stage before buck controller. IC Role / Device Role / Timing Role: Secondary protection element backing up primary TVS diode during slow-rising surges. Use Value: 830 mW power rating sustains clamping longer than 400 mW alternatives during extended overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-C16-Q | ±5 % tolerance (15.3–17.1 V), higher IR (≤ 50 μA at 12.2 V), same SOD123F package | Acceptable where tighter regulation not required; higher leakage may affect ultra-low-power sleep modes | Select for cost-sensitive non-automotive applications where ±5 % VZ meets system spec |
| MMSZ5245B-TP | ±5 % tolerance (15.2–16.8 V), 500 mW Ptot, SOD-123 package (slightly larger footprint) | Limited surge capability (IZSM ≈ 0.9 A); unsuitable for automotive transients without derating | Choose only for consumer-grade 16 V reference where AEC-Q101 and 830 mW rating are unnecessary |
Compared with BZT52H-C16-Q and MMSZ5245B-TP, the BZT52H-B16-QX uniquely combines automotive qualification, ±2 % tolerance, and 830 mW power handling - making it the sole option for AEC-compliant 16 V shunt regulation requiring both precision and robustness.
Availability
BZT52H-B16-QX is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, LED driver protection circuits, and USB-C PD port hardening requiring stable component supply with guaranteed long-term availability.
Supply support for BZT52H-B16-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.
The BZT52H-Q series targets automotive voltage regulation and reference applications, delivering AEC-Q101-compliant Zener diodes with tight tolerances, enhanced surge capability, and optimized thermal performance for modern vehicle electronics.
FAQ
What is the maximum continuous reverse current this Zener can regulate at 16 V?
At 16 V, the maximum continuous reverse current is determined by its 830 mW power rating: IZ(max) = 830 mW / 16 V ≈ 51.9 mA. This assumes Tamb ≤ 25 °C and proper PCB thermal design (1 cm² cathode pad). Derating is required above 25 °C per the thermal resistance curve.
Does the ±2 % tolerance apply at all operating currents?
Yes - the ±2 % tolerance is specified at IZ = 5 mA per Table 8, and represents the initial VZ spread across production lots. Actual VZ shifts with current due to dynamic resistance, but the 5 mA test condition defines the binning and datasheet guarantee.
Can this Zener be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficient at low voltages but positive above ~5.6 V (including 16 V), causing thermal runaway if paralleled without individual ballast resistors. For >830 mW, use a single higher-rated device or active regulation.
How does the marking code 'DY' relate to BZT52H-B16-QX?
'DY' is the top-side marking code for BZT52H-B16-QX per Table 4 - it identifies the ±2 % tolerance variant of the 16 V Zener in the BZT52H-Q series. The cathode bar adjacent to 'DY' confirms pin 1 orientation on the SOD123F body.
BZT52H-B16-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:
- ±1.88%
- 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-B16-QX FAQ
1.How can I place an order for BZT52H-B16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-B16-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-B16-QX reliable?
The price and inventory of BZT52H-B16-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-B16-QX is usually 5 days.
3.What payment methods are accepted for BZT52H-B16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-B16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-B16-QX?
BZT52H-B16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-B16-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-B16-QX?
For technical support, including BZT52H-B16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-B16-QX requirements.
6.How does Aetrix verify that BZT52H-B16-QX is sourced from the original manufacturer or authorized distributors?
All BZT52H-B16-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-B16-QX meets industry standards.
7.What is the process for return or replacement of BZT52H-B16-QX?
All BZT52H-B16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-B16-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-B16-QX part is unused and in its original packaging.
Return procedure for BZT52H-B16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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