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Nexperia USA Inc. BZT52H-A30X
- Part No.:
- BZT52H-A30X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SOD-123F
- Datasheet:
-
BZT52H-A30X.pdf
- Description:
- DIODE ZENER 30V 375MW SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:7,705
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Product details
Overview
BZT52H-A30X 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 30 V nominal Zener voltage at 2 mA test current, ±1 % tolerance, 250 Ω typical differential resistance, and 40 μA maximum reverse leakage at 23 V, supporting stable biasing in analog sensor interfaces and power supply feedback loops.
For engineers reviewing the BZT52H-A30X datasheet, BZT52H-A30X pinout, BZT52H-A30X application, or BZT52H-A30X equivalent, this page provides verified electrical parameters, thermal performance data, SOD123F footprint compatibility, and real-world use cases for voltage clamping, reference generation, and ESD-robust signal conditioning in industrial control and consumer power management circuits.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 30 V output across its cathode–anode terminals when reverse-biased above its breakdown threshold. Its ±1 % tolerance and low temperature coefficient (±0.05 mV/K) ensure tight regulation stability over temperature and load variations.
The SOD123F package enables high-density surface-mount assembly with 150 K/W junction-to-solder-point thermal resistance and 830 mW total power dissipation at Tamb ≤ 25 °C - optimized for FR4 PCBs with standard tin-plated copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 29.7 V to 30.3 V at IZ = 2 mA - ensures precise 30 V reference within ±1 % for feedback networks and ADC references. |
| Differential Resistance (rdif) | 250 Ω max - limits output impedance drift under varying load currents, preserving regulation accuracy in dynamic conditions. |
| Reverse Leakage (IR) | 40 μA max at VR = 23 V - minimizes standby current draw in battery-powered voltage monitor circuits. |
| Power Dissipation (Ptot) | 830 mW at Tamb ≤ 25 °C - supports continuous operation in compact enclosures without forced cooling. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA - defines low-loss conduction path during forward-bias transient events like ESD clamping. |
| Junction Temperature (Tj) | 150 °C max - enables reliable operation in industrial environments with ambient temperatures up to +125 °C. |
Pinout & Package
SOD123F plastic surface-mount package: 2-pin, flat lead, cathode-marked with bar; dimensions 3.5 mm × 1.6 mm × 1.1 mm (L × W × H); compatible with standard reflow soldering profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal - critical for correct polarity in feedback paths. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; forms shunt path to sink excess current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % Zener voltage tolerance | Enables direct replacement of higher-cost references in 12-bit ADC biasing without trimming. |
| 250 Ω max differential resistance | Maintains <±0.3 % regulation error across 0.5–5 mA load current range in LDO feedback dividers. |
| 40 μA max reverse leakage at 23 V | Reduces quiescent current in always-on voltage supervisors, extending battery life in IoT endpoints. |
| 830 mW power rating on FR4 PCB | Supports 30 V/25 mA continuous clamp duty in surge-protected RS-485 transceiver power rails. |
| SOD123F footprint compatibility | Aligns with IPC-7351B standard land pattern - eliminates redesign when upgrading from legacy BZT52B/C series. |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Feedback |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure sensors operating in 0–85 °C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference providing 30 V bias to op-amp gain stage and current-sense resistor network. Use Value: ±1 % VZ tolerance ensures <±0.5 % full-scale output accuracy across temperature, eliminating factory calibration. |
Use Scenario: Regulating auxiliary 3.3 V rail derived from USB-C PD 9 V/15 V/20 V variable input using buck converter feedback divider. IC Role / Device Role / Timing Role: Precision Zener element in upper resistor leg of feedback network to set exact output voltage. Use Value: 250 Ω rdif prevents output voltage shift under load transients, meeting USB PD v3.1 ripple requirements (<20 mVpp). |
| ESD-Protected GPIO Clamping | Programmable Logic Supply Monitoring |
|
Use Scenario: Protecting 3.3 V FPGA configuration pins against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between I/O line and 3.3 V rail, leveraging forward conduction and Zener breakdown. Use Value: 0.9 V VF and 30 V VZ provide symmetric clamping window that limits pin voltage to <3.3 V + 0.9 V and >0 V − 0.9 V during surges. |
Use Scenario: Detecting brown-out condition on 30 V auxiliary supply powering CPLD configuration memory and clock buffers. IC Role / Device Role / Timing Role: Reference element feeding comparator input to trigger reset when supply drops below 28.5 V. Use Value: 40 μA IR at 23 V ensures negligible loading on high-impedance divider, preserving detection threshold accuracy over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZT52H-B30 | ±2 % tolerance (29.4–30.6 V), 40 μA IR at 23 V, same SOD123F package | Acceptable where 30 V reference stability >±0.6 V is sufficient, e.g., non-critical power sequencing. | Select for cost-sensitive designs where ±1 % is not required and tighter thermal drift is not needed. |
| BZX84-C30 | ±5 % tolerance (28.5–31.5 V), 500 mW Ptot, SOT23 package, 400 Ω rdif | Higher power density but looser regulation; suitable for coarse overvoltage cutoff rather than precision reference. | Choose only if board space allows SOT23 and ±5 % tolerance meets system-level accuracy budget. |
Compared with BZT52H-B30 and BZX84-C30, the BZT52H-A30X delivers superior voltage accuracy and lower dynamic impedance - making it the optimal choice for closed-loop regulation, high-resolution sensing, and long-term stability-critical applications where ±1 % tolerance directly impacts measurement fidelity.
Availability
BZT52H-A30X is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery feedback networks, and ESD-protected GPIO clamping requiring stable component supply with guaranteed long-term sourcing.
Supply support for BZT52H-A30X 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 general-purpose Zener diode product line, engineered specifically for precision voltage regulation and robust transient suppression in compact, thermally constrained surface-mount applications.
FAQ
What is the maximum reverse current the BZT52H-A30X can handle during transient events?
The BZT52H-A30X supports a non-repetitive peak reverse current (IZSM) of 1.0 A for 100 μs pulses at Tamb = 25 °C, enabling reliable clamping of short-duration surges such as ESD or inductive kickback without degradation. This value is confirmed in Table 9 of the official Nexperia datasheet Rev. 7.
Can the BZT52H-A30X be used in place of older BZT52B-A30 or BZT52C-A30 variants?
Yes - the BZT52H-A30X shares identical SOD123F packaging, pinout, and electrical specifications with BZT52B-A30 and BZT52C-A30, but offers improved ±1 % tolerance and enhanced thermal performance (Rth(j-sp) = 150 K/W). No PCB or schematic changes are required for drop-in replacement.
How does the temperature coefficient affect regulation accuracy over industrial temperature ranges?
With a specified temperature coefficient of ±0.05 mV/K, the BZT52H-A30X exhibits <±15 mV drift from −40 °C to +125 °C - translating to <±0.05 % error relative to 30 V nominal. This stability is validated in Figure 6 and Table 9 of the datasheet for IZ = 2 mA operation.
Is the SOD123F package compatible with standard reflow soldering processes?
Yes - Nexperia explicitly specifies reflow soldering as the only recommended method for SOD123F packages. The footprint in Figure 12 complies with IPC-7351B, and thermal characteristics (Rth(j-a) = 330 K/W) are characterized using JEDEC-standard FR4 boards with single-sided 1 oz copper and tin plating.
BZT52H-A30X 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):
- 30 V
- Tolerance:
- ±1%
- Power - Max:
- 375 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 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-A30X FAQ
1.How can I place an order for BZT52H-A30X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52H-A30X 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-A30X reliable?
The price and inventory of BZT52H-A30X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52H-A30X is usually 5 days.
3.What payment methods are accepted for BZT52H-A30X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52H-A30X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52H-A30X?
BZT52H-A30X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52H-A30X 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-A30X?
For technical support, including BZT52H-A30X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52H-A30X requirements.
6.How does Aetrix verify that BZT52H-A30X is sourced from the original manufacturer or authorized distributors?
All BZT52H-A30X 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-A30X meets industry standards.
7.What is the process for return or replacement of BZT52H-A30X?
All BZT52H-A30X units undergo pre-shipment inspection (PSI). If there is an issue with BZT52H-A30X, 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-A30X part is unused and in its original packaging.
Return procedure for BZT52H-A30X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZT52H-A30X Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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SMAJ4744A-TP
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