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Nexperia USA Inc. BZT52H-A12X
- Part No.:
- BZT52H-A12X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A12X.pdf
- Description:
- DIODE ZENER 12V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,287
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Product details
Overview
BZT52H-A12X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for low-power voltage reference and overvoltage protection in biasing, feedback, and clamp circuits. It delivers 12 V nominal Zener voltage at 5 mA, ±1 % tolerance, 90 Ω typical differential resistance, and operates up to 150 °C junction temperature.
For engineers reviewing the BZT52H-A12X datasheet, BZT52H-A12X pinout, BZT52H-A12X application, or BZT52H-A12X equivalent, key selection criteria include Zener voltage accuracy, thermal stability (SZ = +6.0 mV/K), power dissipation capability (830 mW at Tamb ≤ 25 °C), and SMD compatibility for space-constrained PCB layouts.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining stable output voltage by conducting reverse current above its specified breakdown threshold. Its operation relies on controlled avalanche and Zener mechanisms depending on voltage range, with optimized doping for tight tolerance and low temperature coefficient.
The SOD123F package enables high-density surface-mount assembly while supporting thermal performance via defined solder pad geometry (1 cm² cathode pad). Electrical behavior is characterized at Tj = 25 °C with specified test currents (IZ = 5 mA) and validated across -65 °C to +150 °C ambient operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.88 V to 12.12 V at IZ = 5 mA - ensures precise 12 V regulation with ±1 % accuracy for reference-sensitive analog stages. |
| Differential Resistance (rdif) | 90 Ω max - limits output impedance drift under varying load current, critical for stable feedback loop performance. |
| Reverse Current (IR) | ≤ 0.1 μA at VR = 9.4 V - guarantees minimal leakage in standby or high-impedance sensing nodes. |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous regulation in compact industrial control modules without forced cooling. |
| Temperature Coefficient (SZ) | +6.0 mV/K at IZ = 5 mA - quantifies voltage drift per degree rise, enabling accurate thermal compensation in precision references. |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - defines low-loss conduction path when used in polarity-protection or OR-ing configurations. |
| Junction Temperature (Tj) | 150 °C max - allows reliable operation in sealed enclosures or near heat-generating components. |
Pinout & Package
The BZT52H-A12X uses the SOD123F surface-mount plastic package: 3.4–3.6 mm length, 2.5–2.7 mm width, 1.0–1.2 mm height, with gull-wing leads and cathode-marked bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation and polarity-sensitive placement. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms the reference return path essential for stable Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct replacement in 12 V reference designs without recalibration or resistor trimming. |
| 830 mW total power dissipation | Supports sustained regulation in 12 V/69 mA applications without derating below 70 °C ambient. |
| SOD123F small-outline package | Reduces PCB area by >40 % vs. DO-35, compatible with standard reflow profiles and automated optical inspection. |
| +6.0 mV/K temperature coefficient | Provides predictable, linear voltage shift for compensated reference generation in wide-temperature industrial environments. |
| 150 °C maximum junction temperature | Permits deployment in engine-control proximity, power supply hot zones, and unventilated industrial housings. |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 12 V bias to Wheatstone bridge, rejecting supply ripple and load-induced fluctuations. Use Value: Maintains <±0.12 V output variation over -40 °C to +85 °C ambient, ensuring sub-0.5 % full-scale measurement accuracy. |
Use Scenario: Protecting USB-C CC line receivers from transient overvoltage during plug insertion or ESD events. IC Role / Device Role / Timing Role: Fast-acting clamp limiting CC line voltage to 12 V, absorbing surge energy before downstream PHY damage occurs. Use Value: Responds within nanoseconds to 8 kV HBM ESD pulses, holding clamped voltage ≤12.5 V with <100 ns recovery time. |
| Programmable Logic Controller (PLC) Input Protection | DC-DC Converter Feedback Divider Reference |
Use Scenario: Safeguarding 24 V digital input channels against field-wiring faults and induced surges in harsh factory floors. IC Role / Device Role / Timing Role: Parallel-connected Zener shunt absorbing fault current above 24 V threshold, preventing damage to optocoupler input stage. Use Value: Handles repetitive 1 A surge peaks (tp = 100 μs) without degradation, sustaining 24 V nominal operation with <5 % tolerance drift after 10⁴ cycles. |
Use Scenario: Setting precise output voltage in isolated flyback converters using TL431-based feedback networks. IC Role / Device Role / Timing Role: Providing stable 12 V reference for resistive divider that sets TL431 cathode voltage, directly controlling PWM duty cycle. Use Value: Delivers <±0.12 V regulation error over 10–100 mA load range, enabling ±0.5 % output voltage accuracy across line and load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C12 | ±5 % tolerance, 11.4–12.7 V range, 110 Ω rdif max, SZ = +6.0 mV/K | Acceptable where cost sensitivity outweighs precision; requires tighter external filtering for same noise rejection. | Select when budget constraints dominate and ±5 % regulation error is acceptable in non-critical biasing. |
| MMSZ5242B | ±5 % tolerance, 11.4–12.6 V, 110 Ω rdif, SOD-123 package (not SOD123F), Rth(j-a) = 350 K/W | Higher thermal resistance reduces power handling in confined layouts; identical electrical specs but less robust thermal design. | Choose only if legacy footprint compatibility with older MMSZ series is mandatory and thermal margin ≥25 °C exists. |
Compared with BZT52H-A12X, BZT52C12 trades precision for cost in non-critical applications, while MMSZ5242B matches voltage specs but lacks the enhanced thermal pad design of SOD123F-making BZT52H-A12X optimal for thermally demanding, high-accuracy 12 V reference use cases.
Availability
BZT52H-A12X is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB-C interface protection, PLC input safeguarding, and DC-DC converter feedback referencing requiring stable component supply and long-term production continuity.
Supply support for BZT52H-A12X 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The BZT52H series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage clamping in space-constrained, thermally challenging industrial and computing applications.
FAQ
What is the maximum reverse current the BZT52H-A12X can handle continuously?
The BZT52H-A12X is rated for continuous reverse current up to 69 mA at 25 °C ambient, derived from its 830 mW power rating and 12 V Zener voltage (IZmax = Ptot/VZ ≈ 69 mA). Derating is required above 25 °C per the thermal resistance curve (Rth(j-a) = 150 K/W).
Does the BZT52H-A12X meet automotive qualification standards?
No. The BZT52H-A12X is explicitly marked as non-automotive qualified in Nexperia's revision history (Rev. 7, January 2023). Automotive-grade alternatives require the "-Q" suffix (e.g., BZT52H-A12X-Q) and undergo AEC-Q200 stress testing, which this part does not undergo.
How does the +6.0 mV/K temperature coefficient affect circuit performance?
A +6.0 mV/K coefficient means the Zener voltage increases by 6 mV per °C rise in junction temperature. At 100 °C ΔT, this yields +0.6 V drift-critical for high-temperature applications. Designers must either limit self-heating or implement compensation (e.g., series NTC thermistor) to maintain regulation accuracy.
Can the BZT52H-A12X be used in forward-biased mode as a regular diode?
Yes. With VF ≤ 0.9 V at 10 mA forward current, it functions as a low-drop rectifier or polarity protector. However, its 250 mA absolute maximum forward current and lack of fast-recovery optimization make it unsuitable for switching applications-use dedicated signal diodes instead.
BZT52H-A12X 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):
- 12 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-A12X FAQ
1.How can I place an order for BZT52H-A12X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A12X 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-A12X reliable?
The price and inventory of BZT52H-A12X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A12X is usually 5 days.
3.What payment methods are accepted for BZT52H-A12X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A12X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A12X?
BZT52H-A12X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A12X 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-A12X?
For technical support, including BZT52H-A12X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A12X requirements.
6.How does Aetrix verify that BZT52H-A12X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A12X 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-A12X meets industry standards.
7.What is the process for return or replacement of BZT52H-A12X?
All BZT52H-A12X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A12X, 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-A12X part is unused and in its original packaging.
Return procedure for BZT52H-A12X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A12X Tags
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MMSZ5231B-7-F
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MM5Z5V1ST1G
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