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Taiwan Semiconductor Corporation BZY55B16
- Part No.:
- BZY55B16
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- 0805 (2012 Metric)
- Datasheet:
-
BZY55B16.pdf
- Description:
- DIODE ZENER 16V 500MW 805
- Quantity:
- Payment:
- Shipping:
Inventory:4,146
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Product details
Overview
BZY55B16 from Taiwan Semiconductor is a surface-mount Zener diode with nominal zener voltage 16.00 V, ±2% tolerance, 500 mW power dissipation, and 5 mA test current - used as a precision voltage reference or low-voltage stabilizer in DC/DC converters and lighting circuits.
For engineers reviewing the BZY55B16 datasheet, BZY55B16 pinout, BZY55B16 application, or BZY55B16 equivalent, key selection criteria include zener voltage accuracy (15.68–16.32 V), dynamic impedance (40 Ω at IZT), leakage current (≤0.1 µA at 12.0 V), and 0805 ceramic package compatibility with automated SMT assembly.
Technical Context
The BZY55B16 operates as a single-die, silicon planar Zener diode optimized for stable reverse-biased breakdown regulation. Its 16 V nominal zener voltage is specified under 10 ms pulse test conditions with 5 mA test current (IZT) and exhibits 40 Ω dynamic impedance (ZZT) at that condition.
It features a maximum forward voltage of 1.5 V at 10 mA forward current, junction temperature range from –55 °C to +150 °C, and thermal resistance of 300 °C/W (junction-to-ambient), making it suitable for compact, thermally constrained PCB layouts in industrial and consumer power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.68–16.32 V at 5 mA - defines precise regulation window for feedback or reference nodes |
| Power Dissipation (PD) | 500 mW - sets maximum continuous steady-state power handling in ambient air |
| Zener Impedance (ZZT) | 40 Ω at IZT = 5 mA - determines output voltage stability under load variation |
| Leakage Current (IR) | ≤0.1 µA at VR = 12.0 V - ensures minimal error current in high-impedance reference paths |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in automotive under-hood and industrial environments |
| Package | 0805 (2.00 × 1.25 mm, ceramic) - enables high-density placement and reflow compatibility |
Pinout & Package
Package: 0805 ceramic surface-mount case with cathode band marking; polarity indicated by visible cathode band on top surface; weight ≈5.99 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to lower-potential node in reverse-bias configuration; forms reference return path |
| Cathode | Zener breakdown terminal / voltage regulation output | Connected to regulated node; voltage referenced to anode; marked by band on package |
Key Features
| Feature | Design Value |
|---|---|
| ±2% zener voltage tolerance | Enables tight regulation without external trimming in feedback loops or analog references |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates bake requirements before reflow, reducing manufacturing overhead |
| RoHS-compliant ceramic package | Meets environmental compliance for global commercial and industrial shipments |
| UL 94HB molding compound | Provides flame-retardant housing suitable for enclosed power supplies and LED drivers |
Applications
| Low-Voltage Stabilizers | On-Board DC/DC Converters |
|---|---|
Use Scenario: Providing stable bias voltage for op-amp input stages or microcontroller reset circuits in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Zener reference element supplying fixed 16 V reference point in unregulated supply rails. Use Value: Delivers 16.00 V ±2% regulation with ≤40 Ω dynamic impedance, minimizing drift across load and temperature. | Use Scenario: Setting feedback threshold in isolated flyback or buck converter secondary-side regulation. IC Role / Device Role / Timing Role: Precision voltage clamp defining output voltage setpoint via optocoupler feedback network. Use Value: Enables accurate 16 V output regulation with <0.1 µA leakage at 12 V, preserving feedback loop integrity. |
| Lighting Applications | Adapters |
Use Scenario: Overvoltage protection and reference stabilization in constant-current LED driver ICs for architectural lighting. IC Role / Device Role / Timing Role: Shunt regulator maintaining stable gate drive voltage for MOSFET control in linear LED strings. Use Value: Withstands 150 °C junction temperature and maintains regulation during transient surges up to 500 mW. | Use Scenario: Input voltage clamping and auxiliary rail regulation in wall-plug AC/DC adapters for consumer electronics. IC Role / Device Role / Timing Role: Secondary-side zener clamp protecting LDO inputs and setting standby voltage thresholds. Use Value: 0805 footprint allows direct integration into space-constrained adapter PCBs without layout redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245B (ON Semiconductor) | 16 V nominal, ±5% tolerance, 225 mW PD, SOT-23 package | Lower power rating and wider voltage tolerance; requires different footprint | Select when board space permits SOT-23 and ±5% regulation is acceptable |
| BZX584-C16 (Nexperia) | 16 V nominal, ±5% tolerance, 300 mW PD, 0805 package, 70 Ω ZZT | Same 0805 footprint but higher impedance and looser tolerance than BZY55B16 | Choose for cost-sensitive designs where 70 Ω impedance and ±5% tolerance meet system specs |
Compared with MMBZ5245B and BZX584-C16, the BZY55B16 offers tighter ±2% tolerance, lower 40 Ω dynamic impedance, and higher 500 mW power rating - making it preferable for precision reference and higher-power stabilization roles in compact 0805 layouts.
Availability
BZY55B16 is available at Aetrix Electronics and suitable for low-voltage stabilizers, on-board DC/DC converters, lighting applications, and adapters requiring stable component supply with consistent parametric performance and RoHS-compliant packaging.
Supply support for BZY55B16 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 power devices, analog ICs, and protection components for industrial and consumer markets.
The BZY55B series belongs to TSC's precision Zener diode product line, engineered for high-accuracy voltage referencing and stabilization in space-constrained, thermally demanding SMT applications.
FAQ
What is the exact zener voltage range for BZY55B16?
The BZY55B16 has a guaranteed zener voltage range of 15.68 V to 16.32 V at 5 mA test current (IZT), reflecting its ±2% tolerance around the nominal 16.00 V value. This range is verified under 10 ms pulse test conditions per the official Taiwan Semiconductor datasheet revision D2301. The BZY55B16 maintains this specification across its rated junction temperature range of –55 °C to +150 °C.
Does BZY55B16 support automated SMT assembly?
Yes, the BZY55B16 uses a standard 0805 (2.00 × 1.25 mm) ceramic surface-mount package with J-STD-020 moisture sensitivity level 1, meaning it can be placed directly onto PCBs without pre-baking. Its cathode band marking and symmetric pad layout align with industry-standard pick-and-place and reflow profiles. The BZY55B16 is supplied on 13-inch tape-and-reel (10,000 units per reel) for seamless SMT line integration.
What is the maximum leakage current for BZY55B16?
The BZY55B16 exhibits a maximum leakage current of 0.1 µA when reverse-biased at 12.0 V (VR), as specified in the Electrical Specifications table. This low leakage ensures minimal error contribution in high-impedance reference circuits such as those found in precision ADC bias networks or microcontroller voltage monitors. The BZY55B16 maintains this performance across its full operating temperature range.
How does the dynamic impedance of BZY55B16 affect regulation stability?
The BZY55B16 has a typical dynamic impedance (ZZT) of 40 Ω at 5 mA test current, which directly determines how much its output voltage varies with changes in current draw. Lower impedance yields tighter regulation - for example, a 1 mA load shift causes only ~40 mV deviation. This makes the BZY55B16 suitable for feedback nodes in switching regulators where loop stability depends on reference rigidity. The BZY55B16's 40 Ω value is significantly lower than alternatives like BZX584-C16 (70 Ω).
Is BZY55B16 RoHS compliant and halogen-free?
Yes, the BZY55B16 is RoHS compliant per EU Directive 2011/65/EU, with lead-free terminations and no restricted substances above threshold limits. While the datasheet confirms RoHS compliance, it does not explicitly state halogen-free status; however, the UL 94HB-rated molding compound and Taiwan Semiconductor's general material declarations indicate brominated flame retardants are not used. The BZY55B16 meets environmental requirements for commercial and industrial deployment.
BZY55B16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 0805 (2012 Metric)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 12 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 0805
BZY55B16 FAQ
1.How can I place an order for BZY55B16 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZY55B16 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 BZY55B16 reliable?
The price and inventory of BZY55B16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZY55B16 is usually 5 days.
3.What payment methods are accepted for BZY55B16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZY55B16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZY55B16?
BZY55B16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZY55B16 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 BZY55B16?
For technical support, including BZY55B16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZY55B16 requirements.
6.How does Aetrix verify that BZY55B16 is sourced from the original manufacturer or authorized distributors?
All BZY55B16 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 BZY55B16 meets industry standards.
7.What is the process for return or replacement of BZY55B16?
All BZY55B16 units undergo pre-shipment inspection (PSI). If there is an issue with BZY55B16, 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 BZY55B16 part is unused and in its original packaging.
Return procedure for BZY55B16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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