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Nexperia USA Inc. BZT52H-A56X
- Part No.:
- BZT52H-A56X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A56X.pdf
- Description:
- DIODE ZENER 56V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:5,847
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Product details
Overview
BZT52H-A56X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for low-power voltage reference and overvoltage protection in space-constrained PCBs. It delivers a nominal 56 V Zener voltage at 2 mA test current, ±1 % tolerance, 375 Ω typical differential resistance, and supports up to 830 mW total power dissipation at Tamb ≤ 25 °C - used in industrial sensor signal conditioning and DC-DC feedback networks.
For engineers reviewing the BZT52H-A56X datasheet, BZT52H-A56X pinout, BZT52H-A56X application, or BZT52H-A56X equivalent, this page provides verified Zener parameters, thermal performance data, cathode/anode terminal mapping, and direct-fit alternatives for stable 56 V regulation in non-automotive embedded systems.
Technical Context
This device operates as a two-terminal reverse-biased voltage reference with sharp breakdown knee at 56 V (IZ = 2 mA), exhibiting a temperature coefficient of +0.05 mV/K and reverse leakage < 0.5 μA at VR = 44.8 V. Its SOD123F package enables surface-mount compatibility with FR4 PCBs using standard reflow profiles.
Thermal resistance from junction to ambient is 330 K/W (free air) and 150 K/W (junction-to-solder-point), supporting reliable operation up to 150 °C junction temperature. Non-repetitive peak reverse power is rated at 40 W for 100 μs pulses, enabling transient suppression in low-energy surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 55.44 V to 56.56 V at IZ = 2 mA - defines tight 56 V regulation window for feedback loop accuracy |
| Tolerance | ±1 % - ensures minimal unit-to-unit variation in voltage-sensitive analog circuits |
| Differential Resistance (rdif) | 375 Ω max at IZ = 2 mA - determines output impedance and load regulation error |
| Reverse Current (IR) | < 0.5 μA at VR = 44.8 V - guarantees low standby power loss in always-on monitoring circuits |
| Total Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines conduction loss during forward-bias fault conditions |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation across extended industrial temperature ranges |
Pinout & Package
SOD123F plastic surface-mounted package: 2.7–3.6 mm length, 1.2–1.7 mm width, 0.7–1.0 mm height, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse bias applied between K and A to activate Zener action |
Key Features
| Feature | Design Value |
|---|---|
| High-precision voltage reference | 56 V ±1 % tolerance enables accurate feedback in isolated DC-DC converters |
| Low thermal drift | +0.05 mV/K temperature coefficient minimizes output shift over −40 °C to +125 °C ambient |
| Compact SMD footprint | SOD123F package occupies < 6 mm² board area - ideal for dense power management layouts |
| Robust surge capability | 40 W non-repetitive peak reverse power (100 μs) protects against ESD and line transients |
| Industry-standard marking | "GT" code per Table 4 confirms BZT52H-A56X identity on device body for traceability |
Applications
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Reference |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter front-end circuitry operating in harsh factory environments. IC Role / Device Role / Timing Role: Zener diode providing fixed 56 V reference to op-amp bias network and ADC input scaling. Use Value: ±1 % tolerance ensures consistent sensor calibration across production batches without per-unit trimming. |
Use Scenario: Secondary-side voltage sensing in isolated flyback converter powering industrial PLC I/O modules. IC Role / Device Role / Timing Role: Precision shunt regulator setting feedback threshold for optocoupler-coupled error amplifier. Use Value: 375 Ω differential resistance maintains loop stability under varying load conditions up to 100 mA output. |
| Overvoltage Clamp for MCU GPIO | Programmable Threshold Detector |
Use Scenario: Protecting 3.3 V microcontroller input pins from accidental 48 V field wiring faults in building automation nodes. IC Role / Device Role / Timing Role: Reverse-biased Zener clamping transient energy before it reaches ESD diodes inside MCU. Use Value: 830 mW steady-state rating allows sustained 56 V clamp without thermal runaway during intermittent overvoltage events. |
Use Scenario: Setting trip point for comparator-based battery pack undervoltage lockout at 56 V system level. IC Role / Device Role / Timing Role: Stable voltage reference connected to comparator inverting input for hysteresis-free threshold detection. Use Value: +0.05 mV/K tempco ensures < 10 mV threshold drift from −25 °C to +75 °C ambient, meeting UL 60950 margin requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52C56 | ±5 % tolerance, 53.2–58.8 V range, 500 Ω rdif max | Higher voltage variation acceptable in non-critical bias networks | Select when cost sensitivity outweighs regulation accuracy; requires recalibration of feedback dividers |
| MMSZ5256B | ±5 % tolerance, SOD-123 package, 53.2–58.8 V, 500 Ω rdif | Same footprint but different thermal resistance (Rth(j-a) = 350 K/W) | Use only if existing layout accommodates higher thermal impedance; verify derating at >70 °C ambient |
Compared with BZT52H-A56X, BZT52C56 trades ±1 % precision for broader tolerance and lower cost, while MMSZ5256B offers identical package but inferior thermal performance - making BZT52H-A56X optimal for high-stability 56 V references where board space and thermal margin are constrained.
Availability
BZT52H-A56X is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC-DC converter feedback loops, and overvoltage protection circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZT52H-A56X 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 logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZT52H series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage regulation in compact SMD designs where ±1 % accuracy and low thermal drift are critical.
FAQ
What is the maximum continuous reverse current for BZT52H-A56X at 25 °C ambient?
The device is rated for 250 mA maximum forward current, but reverse current is not continuously rated - instead, it is characterized at specific test points: IR < 0.5 μA at VR = 44.8 V and IZ = 2 mA defines its leakage behavior. Continuous reverse conduction is limited by Ptot = 830 mW, yielding ~14.8 mA average at 56 V before thermal shutdown.
Can BZT52H-A56X be used in automotive applications?
No. Per Nexperia's revision history (Rev. 7, Jan 2023), the BZT52H series is explicitly designated as non-automotive qualified. It lacks AEC-Q101 qualification, automotive-grade screening, and extended reliability testing. For automotive use, consult Nexperia's BZT52H-Q series or equivalent automotive-qualified Zeners.
How does the SOD123F package affect thermal performance compared to SOD-123?
SOD123F features a flatter profile and optimized copper pad layout (1 cm² cathode pad), achieving Rth(j-sp) = 150 K/W - 20 K/W lower than standard SOD-123. This improves power handling by ~12 % at elevated ambient temperatures and reduces junction temperature rise under identical 56 V/10 mA bias conditions.
Is the "GT" marking code unique to BZT52H-A56X?
Yes. Table 4 confirms "GT" exclusively identifies BZT52H-A56X within the BZT52H series. Other variants use distinct codes (e.g., "G3" for BZT52H-A5V6, "GU" for BZT52H-A62). This one-to-one mapping enables unambiguous visual identification during assembly and field repair.
BZT52H-A56X 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):
- 56 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 120 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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-A56X FAQ
1.How can I place an order for BZT52H-A56X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A56X 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-A56X reliable?
The price and inventory of BZT52H-A56X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A56X is usually 5 days.
3.What payment methods are accepted for BZT52H-A56X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A56X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A56X?
BZT52H-A56X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A56X 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-A56X?
For technical support, including BZT52H-A56X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A56X requirements.
6.How does Aetrix verify that BZT52H-A56X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A56X 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-A56X meets industry standards.
7.What is the process for return or replacement of BZT52H-A56X?
All BZT52H-A56X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A56X, 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-A56X part is unused and in its original packaging.
Return procedure for BZT52H-A56X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A56X Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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