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Taiwan Semiconductor Corporation BZT52B30-G
- Part No.:
- BZT52B30-G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52B30-G.pdf
- Description:
- DIODE ZENER 30V 410MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,016
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Product details
Overview
BZT52B30-G from Taiwan Semiconductor is a 30 V ±2% Zener diode in SOD-123 package, rated for 410 mW total power dissipation and 2 mA test current, designed for precision voltage reference and low-voltage stabilization in space-constrained DC/DC converters and adapter circuits.
For engineers reviewing the BZT52B30-G datasheet, BZT52B30-G pinout, BZT52B30-G application, or BZT52B30-G equivalent, key selection criteria include its 30.0 V nominal zener voltage with ±2% tolerance, 80 Ω dynamic impedance at 2 mA, 0.1 µA leakage at 24.4 V reverse bias, -2.0 mV/°C temperature coefficient, and SOD-123 surface-mount compatibility with J-STD-002 solderability.
Technical Context
The BZT52B30-G operates as a single-die, silicon planar Zener diode optimized for stable reverse-breakdown regulation. Its 30 V nominal zener voltage is specified at 2 mA test current (IZT), with dynamic impedance (ZZT) of 80 Ω and knee impedance (ZZK) of 300 Ω at 0.5 mA (IZK).
It features a negative temperature coefficient of -2.0 mV/°C at 2 mA, enabling predictable drift compensation in reference designs. The device supports junction temperatures from -55°C to +150°C and exhibits 0.1 µA maximum leakage current at VR = 24.4 V, ensuring low standby power loss in voltage-sensing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 29.4–30.6 V at 2 mA - ensures tight 30 V regulation for feedback references |
| Ptot | 410 mW - defines maximum continuous power handling in ambient conditions |
| ZZT @ IZT | 80 Ω - low dynamic impedance maintains stable output under load transients |
| IR @ VR = 24.4 V | 0.1 µA - ultra-low leakage preserves accuracy in high-impedance sensing nodes |
| TZ @ IZTC | -2.0 mV/°C at 2 mA - enables thermal drift prediction in precision analog circuits |
| VF @ IF = 10 mA | 0.9 V - forward voltage supports use as clamp or protection diode in dual-role designs |
| Junction Temp | -55°C to +150°C - supports operation in automotive under-hood and industrial environments |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with matte tin-plated leads, moisture sensitivity level 1 per J-STD-020, weight ≈10.54 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during clamping or forward-bias operation |
| Cathode | Zener breakdown terminal | Marked by band; connected to higher-potential node for reverse-bias voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±2% VZ tolerance | Enables accurate voltage setting without post-production trimming in feedback loops |
| SOD-123 footprint | Supports high-density PCB layouts with standard 0.95 mm pitch and 1.7 mm × 1.25 mm area |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated markets |
| 150°C max junction temp | Permits reliable operation in thermally demanding DC/DC converter topologies |
Applications
| Adapter Voltage Reference | On-board DC/DC Converter |
|---|---|
Use Scenario: Providing stable 30 V reference for secondary-side feedback in wall adapters. IC Role / Device Role / Timing Role: Zener voltage reference for optocoupler-based isolated feedback loop. Use Value: ±2% VZ tolerance and -2.0 mV/°C TC ensure <±3% total reference error over -25°C to +85°C ambient. | Use Scenario: Regulating auxiliary bias rail in buck converter control ICs. IC Role / Device Role / Timing Role: Low-power voltage clamp and reference for gate driver supply sequencing. Use Value: 0.1 µA leakage at 24.4 V minimizes quiescent current draw in always-on standby modes. |
| Low-Voltage Stabilizer | Industrial Sensor Interface |
Use Scenario: Stabilizing 30 V supply for op-amp biasing in analog front-ends. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant voltage across high-impedance load. Use Value: 80 Ω ZZT ensures <0.24 V output variation for ±3 mA load current changes. | Use Scenario: Protecting ADC input pins from overvoltage in 24 V industrial sensors. IC Role / Device Role / Timing Role: Reverse-bias clamp limiting transient excursions to ≤30.6 V. Use Value: Fast response and 410 mW Ptot allow absorption of short-duration ESD pulses without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5262B-7-F | 30 V nominal, ±5% tolerance, 350 mW rating, SOT-23 package | Higher tolerance and lower power limit reduce accuracy in precision references | Select when SOT-23 footprint is required and ±5% VZ is acceptable |
| 1N4743A | 30 V nominal, ±5%, 1 W rating, DO-41 through-hole package | Larger size and leaded format unsuitable for dense SMT assemblies | Select for prototyping or legacy through-hole designs requiring higher power margin |
Compared with MMBZ5262B-7-F and 1N4743A, the BZT52B30-G offers tighter ±2% tolerance and SOD-123 compatibility for modern compact SMT designs, while delivering sufficient 410 mW power handling for most low-current reference and clamp roles without thermal derating concerns.
Availability
BZT52B30-G is available at Aetrix Electronics and suitable for adapter voltage references, on-board DC/DC converters, and low-voltage stabilizers requiring stable component supply across industrial and consumer electronics programs.
Supply support for BZT52B30-G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete devices, analog ICs, and power management solutions for industrial, computing, and consumer markets.
The BZT52B series is part of TSC's precision Zener diode product line, engineered specifically for high-accuracy voltage reference and stabilization in compact, high-reliability power conversion systems.
FAQ
What is the nominal zener voltage and tolerance of the BZT52B30-G?
The BZT52B30-G has a nominal zener voltage of 30.0 V with a tight ±2% tolerance, specified as 29.4 V minimum to 30.6 V maximum at 2 mA test current (IZT). This precision enables direct use in feedback networks without calibration, and the tolerance is verified per JESD22-A108 reliability testing standards.
What package type and mounting compatibility does the BZT52B30-G support?
The BZT52B30-G uses the SOD-123 surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability requirements. Its 1.7 mm × 1.25 mm footprint and 0.95 mm lead pitch support reflow assembly on standard PCBs, and moisture sensitivity level 1 eliminates bake requirements prior to assembly.
How does the BZT52B30-G perform under thermal stress?
The BZT52B30-G operates across a junction temperature range of -55°C to +150°C and exhibits a temperature coefficient of -2.0 mV/°C at 2 mA. Its 357°C/W junction-to-ambient thermal resistance allows safe operation at full 410 mW dissipation up to +75°C ambient when mounted on 1-inch² copper pad, per JEDEC JESD51-3.
What is the leakage current specification for the BZT52B30-G at rated reverse voltage?
At VR = 24.4 V (80% of nominal VZ), the BZT52B30-G guarantees maximum leakage current of 0.1 µA. This ultra-low value ensures minimal error contribution in high-impedance voltage divider or reference circuits, especially critical in battery-powered sensor nodes where standby current must be minimized.
Can the BZT52B30-G be used as both a voltage reference and a transient clamp?
Yes - the BZT52B30-G functions effectively in both roles: as a precision shunt reference (at 2 mA IZT) and as a fast-acting overvoltage clamp (with 0.9 V forward voltage at 10 mA). Its 410 mW power rating and robust SOD-123 construction allow it to absorb repetitive transients up to 100 ns duration without parameter shift, per IEC 61000-4-2 Level 3 testing.
BZT52B30-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 410 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52B30-G FAQ
1.How can I place an order for BZT52B30-G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52B30-G 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 BZT52B30-G reliable?
The price and inventory of BZT52B30-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52B30-G is usually 5 days.
3.What payment methods are accepted for BZT52B30-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52B30-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52B30-G?
BZT52B30-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52B30-G 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 BZT52B30-G?
For technical support, including BZT52B30-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52B30-G requirements.
6.How does Aetrix verify that BZT52B30-G is sourced from the original manufacturer or authorized distributors?
All BZT52B30-G 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 BZT52B30-G meets industry standards.
7.What is the process for return or replacement of BZT52B30-G?
All BZT52B30-G units undergo pre-shipment inspection (PSI). If there is an issue with BZT52B30-G, 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 BZT52B30-G part is unused and in its original packaging.
Return procedure for BZT52B30-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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