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Vishay General Semiconductor - Diodes Division BZT52C11-E3-18
- Part No.:
- BZT52C11-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C11-E3-18.pdf
- Description:
- DIODE ZENER 11V 410MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,757
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Product details
Overview
BZT52C11-E3-18 from Vishay Semiconductors is a silicon planar Zener diode in SOD-123 package, rated for 11 V nominal Zener voltage (±5% tolerance) at 5 mA test current, with 500 mW maximum power dissipation on leaded FR-4 board and 300 mW on standard FR-4, operating across -55 °C to +150 °C. It serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the BZT52C11-E3-18 datasheet, BZT52C11-E3-18 pinout, BZT52C11-E3-18 application, or BZT52C11-E3-18 equivalent, key selection criteria include its 11 V Zener voltage tolerance, dynamic resistance of 20 Ω at 5 mA, temperature coefficient of +5 to +9 × 10⁻⁴/°C, cathode-marked unidirectional polarity, and RoHS-compliant commercial-grade qualification.
Technical Context
This device operates as a single-element, two-terminal voltage reference diode with reverse-biased Zener breakdown behavior. Its electrical characteristics are specified under pulsed conditions (tp = 5 ms) to minimize self-heating, and it exhibits a positive temperature coefficient above 6 V, confirming stable regulation in warm environments.
The SOD-123 package enables surface-mount integration with low thermal resistance junction-to-lead (250 K/W) and junction-to-ambient (420 K/W on FR-4), supporting reliable operation in space-constrained PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 10.45–11.55 V at 5 mA - defines precise clamping threshold for 12 V rail protection or reference generation |
| Power Dissipation | 300 mW on FR-4 board - sets maximum continuous current limit (~27 mA at 11 V) without heatsinking |
| Dynamic Resistance | 20 Ω at IZT = 5 mA - determines output impedance and regulation error under load variation |
| Temperature Coefficient | +5 to +9 × 10⁻⁴/°C - ensures predictable voltage drift up to +150 °C, critical for automotive under-hood use |
| Reverse Leakage | < 100 nA at VR = 8.5 V - guarantees minimal quiescent current in standby or battery-powered circuits |
| Package | SOD-123 - 2.7 × 1.55 mm footprint compatible with standard 0805 reflow profiles and automated placement |
Pinout & Package
SOD-123 surface-mount package with cathode indicated by a bar marking on the body; anode and cathode terminals are arranged linearly along the long axis, optimized for high-density routing and thermal conduction via copper pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; establishes reference point for Zener voltage drop |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage source or signal line being clamped; delivers stable 11 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Ensures tight parameter distribution and long-term stability versus diffused or alloy-junction alternatives |
| E24-standard Zener grading | Enables consistent 11 V selection across production lots and simplifies BOM consolidation |
| ESD robustness | HBM > 8 kV and MM > 800 V - eliminates need for external ESD protection in consumer interface circuits |
| RoHS-compliant, commercial grade | Meets global environmental compliance without derating; suitable for industrial and telecom equipment |
Applications
| Overvoltage Protection | Low-Power Reference |
|---|---|
Use Scenario: Clamp transient spikes on 12 V automotive sensor supply lines during load dump events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing excess energy into ground when input exceeds 11 V. Use Value: Prevents damage to downstream op-amps and ADCs by limiting voltage excursion to ≤11.55 V with <100 nA leakage at 8.5 V. | Use Scenario: Provide stable 11 V reference for analog front-end biasing in portable medical sensors. IC Role / Device Role / Timing Role: Passive voltage reference establishing known potential for precision gain-setting resistors. Use Value: Delivers ±5% accuracy and +5 to +9 × 10⁻⁴/°C TC over -40 to +85 °C, enabling sub-1% measurement repeatability. |
| Signal Level Translation | Power Supply Monitoring |
Use Scenario: Shift logic-level signals from 3.3 V microcontroller to 11 V actuator interface in industrial PLC modules. IC Role / Device Role / Timing Role: Bidirectional level translator using Zener forward drop (~0.7 V) and reverse breakdown (11 V). Use Value: Enables simple, passive translation without active components; SOD-123 footprint minimizes board area vs discrete resistor-Zener solutions. | Use Scenario: Monitor 12 V battery health in smart metering systems by comparing divided battery voltage against BZT52C11-E3-18 reference. IC Role / Device Role / Timing Role: Precision threshold detector element in comparator-based undervoltage lockout (UVLO) circuit. Use Value: Leverages 20 Ω dynamic resistance and 5 mA test current to maintain detection hysteresis within ±0.1 V across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5242BS-7-F | Same 11 V rating, SOT-23 package, 200 mW Ptot, 30 Ω Zz | Higher thermal resistance limits power handling in compact layouts | Select when SOT-23 footprint is required and power demand stays below 150 mW |
| BZX84-C11-7-F | 11 V, ±5%, SOT-23, 350 mW Ptot, 25 Ω Zz, AEC-Q101 qualified | Automotive-qualified version with tighter process control and extended reliability testing | Choose for automotive ECUs where AEC-Q101 compliance is mandatory |
Compared with BZT52C11-E3-18, MMBZ5242BS-7-F offers smaller size but reduced power margin, while BZX84-C11-7-F adds automotive qualification at higher cost-BZT52C11-E3-18 balances commercial-grade reliability, 300 mW capability, and SOD-123 manufacturability for industrial and telecom designs.
Availability
BZT52C11-E3-18 is available at Aetrix Electronics and suitable for overvoltage protection, low-power reference, signal level translation, and power supply monitoring requiring stable component supply across industrial automation, telecom infrastructure, and consumer electronics programs.
Supply support for BZT52C11-E3-18 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The BZT52 series targets cost-sensitive, high-volume applications requiring stable Zener performance in compact SMD packages, with design emphasis on manufacturability, thermal efficiency, and compatibility with standard reflow processes.
FAQ
What is the Zener voltage tolerance of BZT52C11-E3-18?
The BZT52C11-E3-18 has a nominal Zener voltage of 11 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 10.45 V and 11.55 V when tested at 5 mA. This tolerance is guaranteed per the E24 standard and verified under pulsed conditions (tp = 5 ms) to avoid thermal effects. The specification applies directly to the BZT52C11-E3-18 part number as documented in Vishay's official datasheet revision 1.1.
Does BZT52C11-E3-18 meet automotive qualification standards?
No, BZT52C11-E3-18 is a commercial-grade part and not AEC-Q101 qualified. The AEC-Q101 qualified variant is BZT52C11-HE3_A-18, which carries the same electrical specs but undergoes additional stress testing for automotive use. BZT52C11-E3-18 remains suitable for industrial, telecom, and consumer applications where extended temperature operation (-55 °C to +150 °C) and robust ESD performance (>8 kV HBM) are required without formal automotive certification.
What is the maximum continuous Zener current for BZT52C11-E3-18 at 25 °C?
At Tamb = 25 °C, the maximum admissible Zener current for BZT52C11-E3-18 is 154 mA when electrodes are maintained at ambient temperature, as specified in the "Admissible Zener Current" column of the Electrical Characteristics table. This value assumes no self-heating and corresponds to the 300 mW power limit on FR-4 board (P = VZ × IZ → IZ = 300 mW / 11 V ≈ 27 mA); however, the datasheet explicitly lists 154 mA as the absolute maximum under ideal thermal conditions, making BZT52C11-E3-18 suitable for short-duration surge clamping beyond steady-state limits.
How does the temperature coefficient affect BZT52C11-E3-18 in high-temperature environments?
The BZT52C11-E3-18 exhibits a positive temperature coefficient of +5 to +9 × 10⁻⁴/°C, meaning its Zener voltage increases by approximately 0.55–0.99 mV/°C above 25 °C. At +125 °C, this results in a total increase of ~55–99 mV, keeping the regulated voltage within 11.05–11.65 V. This behavior improves stability in hot environments compared to lower-voltage Zeners with negative coefficients, and is fully characterized in the datasheet for BZT52C11-E3-18 across its -55 °C to +150 °C operating range.
Is BZT52C11-E3-18 compatible with lead-free reflow soldering processes?
Yes, BZT52C11-E3-18 is RoHS-compliant and rated for peak reflow temperatures up to 260 °C, matching standard IPC/JEDEC J-STD-020 Class 3a requirements. Its SOD-123 package uses UL 94 V-0 molding compound and has MSL level 1 classification, meaning it can be stored indefinitely before assembly without baking. These attributes are confirmed for the exact BZT52C11-E3-18 ordering code in Vishay's packaging documentation and apply without derating.
BZT52C11-E3-18 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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 410 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8.5 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C11-E3-18 FAQ
1.How can I place an order for BZT52C11-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C11-E3-18 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 BZT52C11-E3-18 reliable?
The price and inventory of BZT52C11-E3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT52C11-E3-18 is usually 5 days.
3.What payment methods are accepted for BZT52C11-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C11-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C11-E3-18?
BZT52C11-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C11-E3-18 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 BZT52C11-E3-18?
For technical support, including BZT52C11-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C11-E3-18 requirements.
6.How does Aetrix verify that BZT52C11-E3-18 is sourced from the original manufacturer or authorized distributors?
All BZT52C11-E3-18 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 BZT52C11-E3-18 meets industry standards.
7.What is the process for return or replacement of BZT52C11-E3-18?
All BZT52C11-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C11-E3-18, 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 BZT52C11-E3-18 part is unused and in its original packaging.
Return procedure for BZT52C11-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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