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Taiwan Semiconductor Corporation BZY55B5V1
- Part No.:
- BZY55B5V1
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- 0805 (2012 Metric)
- Datasheet:
-
BZY55B5V1.pdf
- Description:
- DIODE ZENER 5.1V 500MW 805
- Quantity:
- Payment:
- Shipping:
Inventory:8,899
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Product details
Overview
BZY55B5V1 from Taiwan Semiconductor is a surface-mount Zener diode engineered for precision voltage regulation and reference applications, with a nominal Zener voltage of 5.10 V (±2%), 500 mW power dissipation, 50 Ω dynamic impedance at 5 mA test current, and operation across –55°C to +150°C junction temperature range. It serves as a stable voltage reference in low-power DC/DC converters and LED driver bias networks.
For engineers reviewing the BZY55B5V1 datasheet, BZY55B5V1 pinout, BZY55B5V1 application, or BZY55B5V1 equivalent, key selection criteria include its ±2% VZ tolerance, 50 Ω Zener impedance at IZT = 5 mA, 0805 ceramic package footprint, moisture sensitivity level 1 rating, and compliance with JESD201 Class 1A whisker testing.
Technical Context
The BZY55B5V1 operates as a single-die, unidirectional Zener diode optimized for low-noise voltage reference and stabilization in space-constrained SMT designs. Its electrical behavior is defined by tight 5.00–5.20 V Zener voltage window at 5 mA, 50 Ω dynamic impedance (ZZT) under standard test conditions, and <0.1 µA reverse leakage at 1.0 V.
Thermally, it features a junction-to-ambient thermal resistance of 300°C/W and supports continuous operation up to +150°C junction temperature. The device uses a cathode-band polarity indicator and conforms to RoHS and UL 94HB flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT = 5 mA | 5.00–5.20 V (±2% tolerance ensures stable reference within 100 mV window) |
| Zener impedance ZZT | 50 Ω (low dynamic impedance enables stable regulation under small-signal load variations) |
| Power dissipation PD | 500 mW (supports continuous operation at ambient temperatures ≤70°C without derating) |
| Reverse leakage IR @ VR = 1.0 V | <0.1 µA (ultra-low leakage preserves accuracy in high-impedance reference nodes) |
| Junction temperature range | –55°C to +150°C (enables use in automotive under-hood and industrial control environments) |
| Package | 0805 ceramic (2.00 × 1.25 mm footprint; compatible with standard SMT reflow profiles) |
Pinout & Package
Package: 0805 ceramic surface-mount case with cathode band marking; meets J-STD-020 moisture sensitivity level 1 and JESD201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node to enable regulated voltage drop |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables precise voltage referencing without post-production trimming in cost-sensitive consumer and industrial designs |
| 50 Ω Zener impedance at 5 mA | Minimizes output voltage variation under small-signal load transients in feedback networks |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cycle time and cost |
| UL 94HB molding compound | Meets basic flammability safety requirements for enclosed power supply and lighting modules |
Applications
| LED Driver Bias Reference | Low-Voltage Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 5.1 V reference for current-setting resistors in constant-current LED drivers. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed forward bias for LED string current control. Use Value: Tight ±2% VZ tolerance and 50 Ω impedance ensure consistent LED brightness across production batches and temperature ranges. | Use Scenario: Generating clean reset threshold for 5 V microcontrollers in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Precision voltage threshold detector enabling reliable brown-out detection. Use Value: Sub-0.1 µA leakage at 1.0 V prevents false triggering during deep sleep modes with high-impedance pull-up networks. |
| On-Board DC/DC Converter Feedback | Adapter Output Voltage Stabilization |
Use Scenario: Setting regulated output voltage in isolated flyback or buck converter feedback loops. IC Role / Device Role / Timing Role: Primary voltage reference in optocoupler-coupled feedback path. Use Value: Stable 5.1 V Zener point with minimal temperature drift supports ±1% output regulation over –40°C to +85°C ambient. | Use Scenario: Stabilizing 5 V output in wall-mounted AC/DC adapters for USB-powered peripherals. IC Role / Device Role / Timing Role: Secondary-side shunt regulator maintaining output voltage under light-load conditions. Use Value: 500 mW power rating allows safe dissipation during transient overloads without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F | Same 5.1 V nominal VZ, but ±5% tolerance and 150 Ω ZZT; SOD-323 package (1.7 × 1.25 mm) | Higher impedance and looser tolerance reduce reference accuracy in precision feedback paths | Acceptable for non-critical biasing where cost and board space are prioritized over regulation stability |
| 1N4733A | 5.1 V nominal VZ, ±5% tolerance, 500 mW rating, DO-41 through-hole package | Larger footprint and leaded construction incompatible with fully SMT production lines | Suitable for prototyping or legacy through-hole designs, but requires PCB redesign for SMT migration |
Compared with MMBZ5221BS-7-F and 1N4733A, the BZY55B5V1 delivers tighter ±2% voltage tolerance and lower 50 Ω Zener impedance in a moisture-insensitive 0805 ceramic package-making it optimal for high-accuracy, high-volume SMT applications where thermal reliability and long-term stability are critical.
Availability
BZY55B5V1 is available at Aetrix Electronics and suitable for LED driver bias reference, microcontroller reset circuitry, and on-board DC/DC converter feedback requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for BZY55B5V1 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 with global distribution and AEC-Q200 qualified product lines.
The BZY55B series belongs to TSC's precision Zener diode product line, designed specifically for surface-mount voltage reference and stabilization in compact, thermally demanding power management circuits.
FAQ
What is the exact Zener voltage range for BZY55B5V1 at 5 mA test current?
The BZY55B5V1 has a guaranteed Zener voltage range of 5.00 V (minimum) to 5.20 V (maximum) when tested at IZT = 5 mA under pulse conditions. This ±2% tolerance is specified per the official Taiwan Semiconductor datasheet revision D2301 and applies across the full operating temperature range of –55°C to +150°C junction temperature. The nominal value is 5.10 V.
Does BZY55B5V1 require baking before reflow soldering?
No, BZY55B5V1 does not require baking prior to reflow soldering because it is rated at moisture sensitivity level 1 per J-STD-020. This means the device can be stored indefinitely in dry cabinet conditions and placed directly into standard SMT reflow profiles without preconditioning, simplifying manufacturing workflow and reducing risk of popcorning.
What is the maximum reverse leakage current for BZY55B5V1 at 1.0 V?
The maximum reverse leakage current for BZY55B5V1 at VR = 1.0 V is 0.1 µA, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This ultra-low leakage supports high-impedance reference node integrity in battery-powered and low-power sensor applications where standby current must be minimized.
Is BZY55B5V1 RoHS compliant and halogen-free?
Yes, BZY55B5V1 is RoHS compliant per EU Directive 2011/65/EU, and its molding compound meets UL 94HB flammability rating. While the datasheet confirms RoHS compliance, it does not explicitly state halogen-free status; therefore, halogen content should be verified separately via material declaration if required for specific environmental compliance programs.
What is the thermal resistance from junction to ambient for BZY55B5V1?
The junction-to-ambient thermal resistance (RθJA) for BZY55B5V1 is 300°C/W, measured under standard JEDEC test conditions on FR-4 PCB with minimum copper pad area. This value assumes no additional thermal relief or heatsinking; actual thermal performance improves significantly with enhanced copper pour or thermal vias in production layouts.
BZY55B5V1 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):
- 5.1 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 1 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
BZY55B5V1 FAQ
1.How can I place an order for BZY55B5V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZY55B5V1 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 BZY55B5V1 reliable?
The price and inventory of BZY55B5V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZY55B5V1 is usually 5 days.
3.What payment methods are accepted for BZY55B5V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZY55B5V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZY55B5V1?
BZY55B5V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZY55B5V1 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 BZY55B5V1?
For technical support, including BZY55B5V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZY55B5V1 requirements.
6.How does Aetrix verify that BZY55B5V1 is sourced from the original manufacturer or authorized distributors?
All BZY55B5V1 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 BZY55B5V1 meets industry standards.
7.What is the process for return or replacement of BZY55B5V1?
All BZY55B5V1 units undergo pre-shipment inspection (PSI). If there is an issue with BZY55B5V1, 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 BZY55B5V1 part is unused and in its original packaging.
Return procedure for BZY55B5V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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