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Taiwan Semiconductor Corporation BZV55C56 L1G
- Part No.:
- BZV55C56 L1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-213AC, MINI-MELF, SOD-80
- Datasheet:
-
BZV55C56 L1G.pdf
- Description:
- DIODE ZENER 56V 500MW MINI MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,146
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Product details
Overview
BZV55C56 L1G from Taiwan Semiconductor is a 500mW surface-mount Zener diode with nominal zener voltage 56V, ±5% tolerance, 2.5mA test current, 135Ω dynamic impedance at IZT, and 0.1µA leakage current at 42V reverse bias. It serves as a precision voltage reference or low-power voltage regulator in DC/DC converter feedback paths.
For engineers reviewing the BZV55C56 L1G datasheet, BZV55C56 L1G pinout, BZV55C56 L1G application, or BZV55C56 L1G equivalent, key selection criteria include zener voltage accuracy, thermal resistance (300°C/W), MMELF package compatibility, junction temperature range (–65°C to +175°C), and cathode-band polarity marking.
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. Its single-die construction in a hermetically sealed glass MMELF case ensures long-term stability and low leakage.
Designed for low-current regulation, it delivers specified VZ at IZT = 2.5mA with differential impedance of 135Ω and supports forward conduction up to 1V at 10mA. Thermal performance is defined by RθJA = 300°C/W, limiting continuous power dissipation to 500mW at TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 52–60V nominal 56V; defines stable regulation voltage under 2.5mA test current |
| IZT | 2.5mA; minimum current required to achieve specified VZ and impedance |
| ZZT @ IZT | 135Ω; dynamic impedance affecting regulation precision under small-signal AC variations |
| IR @ VR = 42V | 0.1µA; reverse leakage ensuring minimal quiescent current in standby operation |
| PD | 500mW; maximum continuous power dissipation at 25°C ambient, derated above |
| TJ Range | –65°C to +175°C; wide operating junction temperature enabling use in industrial environments |
| Package | MMELF; miniature glass axial package with matte tin-plated leads, JEDEC DO-213AA compliant |
Pinout & Package
MMELF package: hermetically sealed glass body, 3.50±0.20 mm length, Ø1.50±0.10 mm diameter, cathode indicated by band. Matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to lower potential node; carries forward current up to 10mA (VF = 1V) |
| Cathode | Zener breakdown terminal / high-voltage side in regulation | Marked with band; referenced to system ground or feedback node in voltage reference circuits |
Key Features
| Feature | Design Value |
|---|---|
| ±5% VZ tolerance | Enables predictable voltage setting without post-production trimming in cost-sensitive designs |
| Hermetically sealed glass | Prevents moisture ingress and parameter drift over time, supporting >10-year reliability in sealed enclosures |
| RθJA = 300°C/W | Allows direct PCB mounting without heatsink in low-power (<200mW) applications |
| Cathode band polarity marking | Ensures unambiguous orientation during automated placement and manual inspection |
| RoHS compliant | Meets EU Directive 2011/65/EU for lead-free manufacturing and end-of-life recycling |
Applications
| Low-Voltage Stabilizers | On-Board DC/DC Converters |
|---|---|
Use Scenario: Providing stable bias voltage for op-amp references or microcontroller reset circuits in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Voltage reference element establishing precise threshold for comparator or supervisor IC activation. Use Value: 56V rating enables use in intermediate bus monitoring; ±5% tolerance avoids calibration overhead in Class II safety-isolated supplies. | Use Scenario: Feedback voltage divider node in isolated flyback or buck-boost converters powering industrial PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side voltage reference stabilizing output regulation loop via optocoupler-coupled feedback path. Use Value: Low 0.1µA leakage at 42V ensures minimal error injection into high-impedance feedback dividers, preserving ±1% output accuracy. |
| Adapters | Industrial Power Supplies |
Use Scenario: Overvoltage protection clamping in universal-input AC/DC wall adapters rated for 100–240VAC input. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing surge energy during line transients or hot-plug events. Use Value: 500mW power rating allows brief 100ms surges up to 5.6W without failure, meeting IEC 61000-4-5 Level 3 requirements. | Use Scenario: Reference voltage source for analog sensing front-ends in motor drive control boards operating in 85°C ambient. IC Role / Device Role / Timing Role: Stable voltage reference for ADC biasing and current-sense amplifier offset nulling. Use Value: 175°C max junction temperature permits operation in thermally constrained zones near power stages without derating. |
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 |
|---|---|---|---|
| STMicroelectronics BZX55-C56 | Same 56V nominal VZ, ±5%, but 500mW PD in DO-35 package; RθJA ≈ 500°C/W | DO-35 requires larger PCB footprint and higher thermal resistance limits power handling in compact layouts | Prefer BZV55C56 L1G for MMELF space-constrained designs requiring lower thermal resistance |
| Vishay BZT52-B56 | SOD-123 package, 56V VZ, ±5%, 500mW, but VF = 1.5V at 10mA and IR = 0.5µA at 42V | Higher leakage and forward drop reduce efficiency in low-quiescent-current feedback networks | Prefer BZV55C56 L1G where sub-0.2µA leakage and 1V VF are critical for precision reference stability |
Compared with BZX55-C56 and BZT52-B56, the BZV55C56 L1G offers superior thermal resistance (300°C/W vs. ≥500°C/W), lower leakage (0.1µA vs. ≥0.5µA), and identical VZ tolerance-making it optimal for high-density, thermally demanding, or ultra-low-power voltage reference nodes.
Availability
BZV55C56 L1G is available at Aetrix Electronics and suitable for on-board DC/DC converters, industrial power supplies, adapters, and low-voltage stabilizers requiring stable component supply across extended production lifecycles.
Supply support for BZV55C56 L1G 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, rectifiers, Zener diodes, and TVS components for industrial and consumer markets.
The BZV55C56 L1G belongs to TSC's BZV55C series of precision Zener diodes designed for reliable voltage regulation and reference in space-constrained, thermally demanding power management circuits.
FAQ
What is the zener voltage tolerance of BZV55C56 L1G?
The BZV55C56 L1G has a standard zener voltage tolerance of ±5%, meaning its actual breakdown voltage falls between 52V and 60V when tested at 2.5mA (IZT). This tolerance is confirmed in the Electrical Specifications table on page 2 of the official Taiwan Semiconductor datasheet (Version H2301), and applies across the full operating temperature range.
What package type does BZV55C56 L1G use?
BZV55C56 L1G uses the MMELF (Miniature Metal Electrode Leadless Face) package - a hermetically sealed glass axial device measuring 3.50±0.20 mm in length and Ø1.50±0.10 mm in diameter. It complies with JEDEC DO-213AA and features matte tin-plated leads compatible with J-STD-002 soldering standards.
What is the maximum power dissipation for BZV55C56 L1G?
The BZV55C56 L1G has a maximum power dissipation (PD) of 500mW at an ambient temperature of 25°C. Derating is required above 25°C at 4.0mW/°C, based on its junction-to-ambient thermal resistance of 300°C/W. This value is specified in the Absolute Maximum Ratings table on page 2 of the Taiwan Semiconductor datasheet.
Does BZV55C56 L1G have RoHS compliance?
Yes, BZV55C56 L1G is RoHS compliant, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), meeting EU Directive 2011/65/EU requirements for environmentally restricted substances.
What is the reverse leakage current specification for BZV55C56 L1G?
The reverse leakage current (IR) for BZV55C56 L1G is 0.1µA maximum at VR = 42V, as specified in the Electrical Specifications table. This low leakage ensures minimal error contribution in high-impedance voltage reference and feedback divider networks, particularly in battery-operated or energy-harvesting systems.
BZV55C56 L1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-213AC, MINI-MELF, SOD-80
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 135 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 42 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Mini MELF
BZV55C56 L1G FAQ
1.How can I place an order for BZV55C56 L1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV55C56 L1G 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 BZV55C56 L1G reliable?
The price and inventory of BZV55C56 L1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV55C56 L1G is usually 5 days.
3.What payment methods are accepted for BZV55C56 L1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV55C56 L1G transactions.
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4.How is shipping managed for BZV55C56 L1G?
BZV55C56 L1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV55C56 L1G 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 BZV55C56 L1G?
For technical support, including BZV55C56 L1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV55C56 L1G requirements.
6.How does Aetrix verify that BZV55C56 L1G is sourced from the original manufacturer or authorized distributors?
All BZV55C56 L1G 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 BZV55C56 L1G meets industry standards.
7.What is the process for return or replacement of BZV55C56 L1G?
All BZV55C56 L1G units undergo pre-shipment inspection (PSI). If there is an issue with BZV55C56 L1G, 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 BZV55C56 L1G part is unused and in its original packaging.
Return procedure for BZV55C56 L1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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