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onsemi BZX84C56LT1G
- Part No.:
- BZX84C56LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C56LT1G.pdf
- Description:
- DIODE ZENER 56V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:13,414
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Product details
Overview
BZX84C56LT1G from onsemi is a 56 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 200 Ω dynamic impedance at 5 mA test current and 110 µA reverse leakage at 44.8 V. It provides precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the BZX84C56LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal coefficient (+39.2 mV/°C), junction-to-ambient thermal resistance (500 °C/W), and ESD robustness (Class 3, >16 kV HBM).
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode-anode terminals when reverse-biased above its breakdown threshold. Its Zener action delivers predictable regulation under varying load and temperature conditions, with specified performance at IZT = 5 mA, 1 mA, and 20 mA test currents.
The BZX84C56LT1G exhibits a positive temperature coefficient of +39.2 mV/°C at 5 mA, indicating increasing Zener voltage with rising junction temperature. Its capacitance is 40 pF at 0 V bias and 1 MHz, supporting low-noise signal conditioning in analog front-ends and power supply feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 52–60 V at 5 mA test current - defines regulated voltage range for reference and clamping |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 200 Ω at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage Current | 110 µA at 44.8 V - impacts standby power loss and high-impedance node stability |
| Temperature Coefficient | +39.2 mV/°C at 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Capacitance | 40 pF at 0 V, 1 MHz - affects high-frequency noise coupling and bandwidth in filtering applications |
| ESD Rating | Class 3 (>16 kV HBM) - ensures robustness against human-body model electrostatic discharge events |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, void-free thermosetting case, corrosion-resistant finish, UL 94 V-0 flammability rating, 2.90 × 1.30 × 1.00 mm footprint, 1.90 mm lead pitch. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; forms current path into diode during reverse conduction |
| 2 | No Connection | Internally unconnected terminal; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential side (e.g., supply rail); carries regulated Zener current to ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU and JEDEC JS709B - enables environmentally compliant manufacturing |
| Automated Assembly Optimized | SOT-23 package geometry supports high-yield pick-and-place and reflow soldering |
| Tight Thermal Stability | Specified Zener voltage and impedance validated at TA = 25°C with defined derating curves |
| High-Density Packaging | 2.90 × 1.30 mm footprint enables placement in compact mobile and wearable PCB layouts |
| Low-Leakage Regulation | 110 µA max IR at 44.8 V minimizes quiescent current draw in battery-powered systems |
Applications
| Portable Power Management | Signal-Level Clamping |
|---|---|
Use Scenario: Voltage reference for battery charge controller ICs in Bluetooth earbuds and smartwatches. IC Role / Device Role / Timing Role: Shunt reference providing stable 56 V threshold for overvoltage detection and cutoff logic. Use Value: Enables accurate battery pack protection without external precision resistors or op-amps. |
Use Scenario: Input protection for ADC front-end in industrial sensor nodes operating near 48 V DC rails. IC Role / Device Role / Timing Role: Clamp diode limiting transient spikes to ≤56 V before signal conditioning circuitry. Use Value: Prevents ADC saturation and input stage damage while adding <1 ns propagation delay. |
| Automotive Body Control | LED Driver Reference |
Use Scenario: Load-dump suppression in 12 V/24 V automotive body modules with LIN bus interfaces. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing ISO 7637-2 Pulse 5a energy via controlled Zener conduction. Use Value: Maintains system operation during 100 V/100 ms transients without requiring TVS diodes with higher clamping voltage. |
Use Scenario: Current-setting reference in constant-current LED driver for automotive interior lighting. IC Role / Device Role / Timing Role: Precision voltage source defining ISET for current mirror or op-amp feedback loop. Use Value: Delivers ±5% output current accuracy across −40°C to +125°C ambient with minimal drift compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5267BLT1 | 56 V nominal, ±5% tolerance, 225 mW rating, 200 Ω ZZT at 20 mA | Higher power rating but larger SOT-23 variant; different thermal derating curve | Select for higher pulse-power handling where board layout allows marginally larger footprint |
| BZX84-C56-7-F | 56 V nominal, ±5%, 300 mW on alumina substrate, 200 Ω ZZT at 5 mA, same SOT-23 package | Optimized for ceramic substrates; not qualified for automotive PPAP | Prefer for non-automotive industrial designs requiring higher steady-state power on thermally enhanced boards |
Compared with BZX84C56LT1G, MMBZ5267BLT1 offers higher pulse energy absorption but requires verification of thermal interface, while BZX84-C56-7-F supports greater continuous dissipation on alumina yet lacks AEC-Q101 qualification - making BZX84C56LT1G optimal for cost-sensitive, space-constrained automotive and portable designs needing certified reliability.
Availability
BZX84C56LT1G is available at Aetrix Electronics and suitable for portable power management, signal-level clamping, and automotive body control applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for BZX84C56LT1G 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
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84CxxxLT1G series belongs to onsemi's standard-tolerance Zener regulator portfolio, designed specifically for high-density, cost-sensitive consumer and automotive electronics requiring reliable voltage reference and transient suppression in ultra-small packages.
FAQ
What is the nominal Zener voltage and tolerance of the BZX84C56LT1G?
The BZX84C56LT1G has a nominal Zener voltage of 56 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 52 V and 60 V when tested at 5 mA (IZT). This specification is verified per onsemi's BZX84CxxxLT1G Series datasheet Rev. 23, page 3, and applies directly to the BZX84C56LT1G device under standard ambient conditions.
Does the BZX84C56LT1G have automotive qualification?
No - the BZX84C56LT1G is not AEC-Q101 qualified. However, the SZBZX84C56LT1G variant (with "SZ" prefix) is AEC-Q101 qualified and PPAP capable. The BZX84C56LT1G is intended for commercial and industrial applications; for automotive use, engineers must specify the SZ-prefixed part number to ensure compliance with automotive reliability standards.
What is the thermal resistance and maximum junction temperature of the BZX84C56LT1G?
The BZX84C56LT1G has a junction-to-ambient thermal resistance (RJA) of 500 °C/W on FR-5 board, and its junction and storage temperature range is −65°C to +150°C. These values are specified in the Maximum Ratings table (page 2) of the official datasheet and define safe operating limits for PCB layout and thermal management design around the BZX84C56LT1G.
How is the pinout configured for the BZX84C56LT1G in the SOT-23 package?
The BZX84C56LT1G uses Style 8 pinout per onsemi's mechanical drawings: Pin 1 is Anode, Pin 2 is No Connection (internally unconnected), and Pin 3 is Cathode. This configuration is explicitly confirmed in the Electrical Characteristics tables on pages 3 and 4 of the datasheet and must be observed to avoid functional failure or damage during circuit operation.
What is the reverse leakage current specification for the BZX84C56LT1G?
The BZX84C56LT1G specifies a maximum reverse leakage current (IR) of 110 µA at a reverse voltage (VR) of 44.8 V, measured at TA = 25°C. This value appears in the "ELECTRICAL CHARACTERISTICS − BZX84CxxxLT1 SERIES" table (page 3) and directly impacts low-power design margins, especially in battery-operated systems where standby current must be minimized.
BZX84C56LT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±7%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C56LT1G FAQ
1.How can I place an order for BZX84C56LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C56LT1G 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 BZX84C56LT1G reliable?
The price and inventory of BZX84C56LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C56LT1G is usually 5 days.
3.What payment methods are accepted for BZX84C56LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C56LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C56LT1G?
BZX84C56LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C56LT1G 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 BZX84C56LT1G?
For technical support, including BZX84C56LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C56LT1G requirements.
6.How does Aetrix verify that BZX84C56LT1G is sourced from the original manufacturer or authorized distributors?
All BZX84C56LT1G 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 BZX84C56LT1G meets industry standards.
7.What is the process for return or replacement of BZX84C56LT1G?
All BZX84C56LT1G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C56LT1G, 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 BZX84C56LT1G part is unused and in its original packaging.
Return procedure for BZX84C56LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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