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Vishay General Semiconductor - Diodes Division BZT52C56-E3-08
- Part No.:
- BZT52C56-E3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C56-E3-08.pdf
- Description:
- DIODE ZENER 56V 410MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:11,847
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Product details
Overview
BZT52C56-E3-08 from Vishay Semiconductors is a silicon planar Zener diode rated for 56 V nominal zener voltage (±5% tolerance), 2 mA test current, 425 Ω dynamic resistance at IZT, and +8 to +12 × 10−4/°C temperature coefficient - used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the BZT52C56-E3-08 datasheet, BZT52C56-E3-08 pinout, BZT52C56-E3-08 application, or BZT52C56-E3-08 equivalent, key selection criteria include zener voltage stability across temperature, power dissipation limits on FR-4 (300 mW), SOD-123 package thermal resistance (RthJA = 420 K/W), and compliance with commercial-grade RoHS requirements.
Technical Context
This device operates as a single-element, unidirectional voltage reference diode with cathode-marked polarity. Its zener breakdown mechanism delivers stable reverse conduction above 53.2 V (min) and below 58.8 V (max) at 2 mA, with low leakage (<100 nA at 42 V) and predictable thermal drift.
The SOD-123 surface-mount package enables compact PCB integration while supporting JEDEC-compliant reflow profiles (peak 260 °C). It is not AEC-Q101 qualified - the -E3-08 suffix denotes commercial-grade, RoHS-compliant, 8 mm tape-on-7″ reel packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 53.2–58.8 V at 2 mA - defines precise clamping threshold for overvoltage protection or reference generation |
| Dynamic Resistance (ZZ) | 425 Ω at IZT = 2 mA - determines output impedance and regulation sensitivity to current variation |
| Temperature Coefficient (αVZ) | +8 to +12 × 10−4/°C - indicates positive drift requiring compensation in high-stability references |
| Max Power Dissipation | 300 mW on FR-4 board - sets absolute upper limit for continuous DC or pulsed operation under standard layout |
| Reverse Leakage Current | <100 nA at 42 V - ensures minimal parasitic loading in high-impedance bias networks |
| Thermal Resistance (RthJA) | 420 K/W - quantifies junction-to-ambient heat transfer efficiency on recommended footprint |
| Operating Temperature | −55 to +150 °C - supports industrial and extended-temperature embedded applications |
Pinout & Package
SOD-123 surface-mount package: 2-terminal, cathode-bar marked, 2.7 mm × 1.55 mm body, 0.85 mm height, MSL level 1, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail during zener operation |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 56 V reference when reverse-biased; marked by bar on package |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures repeatable breakdown characteristics and long-term parameter stability vs. alloyed or diffused alternatives |
| E24-standard voltage grading | Enables standardized selection across 2.2–75 V range without custom binning or calibration |
| RoHS-compliant, commercial grade | Meets environmental compliance for non-automotive industrial and consumer electronics |
| Low-profile SOD-123 package | Reduces board space and thermal mass while maintaining manufacturability in high-volume SMT lines |
| ESD robustness (HBM > 8 kV) | Supports handling and assembly without special ESD controls beyond standard Class 1B practices |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 56 V reference for feedback loop of isolated DC-DC converter. IC Role / Device Role / Timing Role: Zener diode functions as passive voltage reference in secondary-side error amplifier circuit. Use Value: Maintains ±5% regulation accuracy over −55 to +125 °C ambient, enabling reliable output voltage control without active IC. | Use Scenario: Protecting microcontroller I/O pin from transient surges exceeding 56 V. IC Role / Device Role / Timing Role: Clamps fast-rising voltage spikes by entering reverse breakdown before damage threshold. Use Value: Limits peak voltage to ≤58.8 V with sub-100 ns response, preserving signal integrity and preventing latch-up. |
| ADC Reference Buffer | Current Source Bias |
Use Scenario: Generating precise 56 V bias for high-voltage sensor front-end amplifier. IC Role / Device Role / Timing Role: Supplies regulated voltage to op-amp supply rail in analog signal conditioning chain. Use Value: Delivers <100 nA leakage and +8 to +12 × 10−4/°C TC, minimizing offset drift in 16-bit measurement systems. | Use Scenario: Setting constant current for LED driver or photodiode bias network. IC Role / Device Role / Timing Role: Acts as voltage-controlled current source element via series resistor. Use Value: Enables accurate 1 mA current setting (with 56 kΩ resistor) with <0.5% tolerance contribution from VZ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5256BS-7-F | Same 56 V nominal rating, ±5%, but SOT-23 package (3-pin, dual-anode configuration); 350 mW Ptot on FR-4 | Requires different footprint and may introduce parasitic capacitance due to larger pad area | Select if dual-diode topology or higher power margin is needed; verify layout compatibility |
| 1N5256B-TAP | Through-hole DO-35 package; 500 mW Ptot; ±5% tolerance; same VZ range but higher RthJA (~500 K/W) | Not suitable for automated SMT assembly; better for prototyping or legacy through-hole designs | Choose only for manual assembly or where thermal derating allows higher ambient temperatures |
Compared with BZT52C56-E3-08, MMBZ5256BS-7-F offers higher power handling in SMT form but requires dual-diode layout adaptation, while 1N5256B-TAP provides greater power and legacy compatibility at the cost of automation readiness and thermal performance.
Availability
BZT52C56-E3-08 is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and analog biasing applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for BZT52C56-E3-08 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability and precision.
The BZT52 series belongs to Vishay's small-signal Zener diode product line, designed specifically for compact, stable voltage regulation and protection in space-constrained industrial and consumer electronics.
FAQ
What is the exact zener voltage tolerance for BZT52C56-E3-08?
The BZT52C56-E3-08 has a nominal zener voltage of 56 V with a ±5% tolerance, meaning its guaranteed breakdown range is 53.2 V (min) to 58.8 V (max) when measured at 2 mA test current per the Vishay datasheet revision 1.1.
Is BZT52C56-E3-08 qualified to AEC-Q101?
No, BZT52C56-E3-08 is a commercial-grade part. The -E3-08 suffix indicates RoHS compliance and standard reliability screening. For AEC-Q101 qualification, the correct variant is BZT52C56-HE3_A-08, which carries the "HE3_A" designation and explicit automotive qualification.
What is the maximum continuous power dissipation for BZT52C56-E3-08 on a standard FR-4 PCB?
The BZT52C56-E3-08 is rated for 300 mW maximum continuous power dissipation when mounted on an FR-4 board using Vishay's recommended soldering footprint. This derates linearly above 25 °C ambient per the thermal curve in Figure 1 of the datasheet.
Does BZT52C56-E3-08 have a specified dynamic resistance value?
Yes, the BZT52C56-E3-08 has a typical dynamic resistance (ZZ) of 425 Ω at 2 mA test current (IZT), as confirmed in the Electrical Characteristics table on page 2 of the Vishay document number 86342.
What package type and marking code does BZT52C56-E3-08 use?
BZT52C56-E3-08 uses the SOD-123 surface-mount package and is marked with the code "Z2" on the cathode end, per the Vishay BZT52 series marking convention documented in the datasheet.
BZT52C56-E3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZT52
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 410 mW
- Impedance (Max) (Zzt):
- 135 Ohms
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C56-E3-08 FAQ
1.How can I place an order for BZT52C56-E3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C56-E3-08 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 BZT52C56-E3-08 reliable?
The price and inventory of BZT52C56-E3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C56-E3-08 is usually 5 days.
3.What payment methods are accepted for BZT52C56-E3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C56-E3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C56-E3-08?
BZT52C56-E3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C56-E3-08 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 BZT52C56-E3-08?
For technical support, including BZT52C56-E3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C56-E3-08 requirements.
6.How does Aetrix verify that BZT52C56-E3-08 is sourced from the original manufacturer or authorized distributors?
All BZT52C56-E3-08 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 BZT52C56-E3-08 meets industry standards.
7.What is the process for return or replacement of BZT52C56-E3-08?
All BZT52C56-E3-08 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C56-E3-08, 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 BZT52C56-E3-08 part is unused and in its original packaging.
Return procedure for BZT52C56-E3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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