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Vishay General Semiconductor - Diodes Division BZT52C22-E3-18
- Part No.:
- BZT52C22-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
BZT52C22-E3-18.pdf
- Description:
- DIODE ZENER 22V 410MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,348
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Product details
Overview
BZT52C22-E3-18 from Vishay Semiconductors is a silicon planar Zener diode in SOD-123 package, rated for 22 V nominal Zener voltage (±5% tolerance) at 5 mA test current, with 500 mW power dissipation on leaded FR-4 board and 300 mW on standard PCB, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZT52C22-E3-18 datasheet, BZT52C22-E3-18 pinout, BZT52C22-E3-18 application, or BZT52C22-E3-18 equivalent, key selection criteria include Zener voltage stability across temperature (±8 to +10 ×10⁻⁴/°C), dynamic resistance of 55 Ω at 5 mA, reverse leakage <100 nA at 17 V, and AEC-Q101 non-qualified commercial-grade qualification status.
Technical Context
This device operates as a single-element, cathode-marked, unidirectional voltage reference diode. Its Zener breakdown mechanism delivers stable regulation under reverse bias, with thermal resistance junction-to-lead of 250 K/W and junction-to-ambient of 420 K/W on FR-4 board.
The BZT52C22-E3-18 exhibits a positive temperature coefficient (+8 to +10 ×10⁻⁴/°C), indicating increasing Zener voltage with rising temperature - a critical factor for temperature-compensated reference designs and high-reliability industrial sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V nominal, 20.9–23.1 V range at 5 mA - defines precise clamping threshold for 24 V rail protection |
| Power Dissipation (Ptot) | 300 mW on FR-4 board - limits continuous current to ~13.6 mA at 22 V without heatsinking |
| Dynamic Resistance (ZZ) | 55 Ω at IZT = 5 mA - determines output impedance and load regulation error in shunt regulator topologies |
| Reverse Leakage (IR) | <100 nA at VR = 17 V - ensures minimal quiescent current in battery-powered voltage monitor circuits |
| Temp. Coefficient (αVZ) | +8 to +10 ×10⁻⁴/°C - requires compensation in precision references operating across -55°C to +150°C |
| Max. Zener Current (IZ) | 20 mA at Tamb = 25°C - sets upper bound for safe DC operation before thermal runaway risk |
| Package | SOD-123 - surface-mount, 2.7 × 1.55 mm footprint compatible with automated pick-and-place and reflow |
Pinout & Package
SOD-123 package: 2-terminal, cathode-indicated by bar marking; compact 2.7 mm × 1.55 mm outline with 0.85 mm height; JEDEC-compliant footprint with 1.175 mm lead length and 0.35 mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to circuit ground or lower potential; forms return path during Zener conduction |
| Cathode | Zener breakdown terminal / regulated output node | Connected to protected node (e.g., IC supply rail); clamps voltage to 22 V when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Enables tight VZ tolerance control (±5%) and repeatable breakdown characteristics across production lots |
| E24-standard voltage grading | Ensures interoperability with legacy 22 V reference designs and simplifies BOM consolidation |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking - reduces manufacturing overhead |
| UL 94 V-0 molding compound | Meets flammability requirements for industrial control panels and medical auxiliary circuits |
| RoHS-compliant (E3 suffix) | Supports EU WEEE compliance and eliminates lead contamination risk in recycling streams |
Applications
| Overvoltage Protection for 24 V Sensors | Low-Power Reference in Battery Monitors |
|---|---|
Use Scenario: Protecting analog front-end inputs of industrial pressure transducers powered from 24 V DC rails against transient surges. IC Role / Device Role / Timing Role: Shunt clamping element placed between sensor output and ground, conducting only during overvoltage events ≥23.1 V. Use Value: Limits fault energy to <300 mW, preventing damage to downstream op-amps while maintaining signal integrity below 22 V. | Use Scenario: Providing stable 22 V reference for ADC full-scale calibration in portable lithium-ion battery fuel gauges. IC Role / Device Role / Timing Role: Passive voltage reference source in resistor-divider network feeding precision ADC reference input. Use Value: Delivers ±5% initial accuracy and +8 to +10 ×10⁻⁴/°C drift - sufficient for 12-bit measurement resolution across -20°C to +70°C. |
| ESD Clamp in USB-C Power Delivery Circuits | Voltage Supervisor for FPGA Configuration Rails |
Use Scenario: Secondary ESD protection on 20 V–24 V VBUS lines in USB-C PD sink applications where primary TVS may not clamp low enough. IC Role / Device Role / Timing Role: Low-capacitance (<2 pF) Zener clamp connected between VBUS and ground, activated after primary TVS conduction. Use Value: Adds <100 nA leakage at 17 V, preserving standby current budget while lowering clamping voltage by 1.5 V versus 24 V TVS alone. | Use Scenario: Monitoring 22 V auxiliary rail that powers FPGA configuration PROMs and JTAG interfaces in telecom baseband modules. IC Role / Device Role / Timing Role: Input to comparator-based reset generator, asserting POR when rail drops below 20.9 V. Use Value: Enables deterministic power-on sequencing with 2.2 V hysteresis window defined by Zener tolerance band, eliminating false resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5247BS-7-F | Same 22 V nominal Zener, SOT-23 package (3-pin, but configured as dual-anode single-cathode); 200 mW Ptot; 70 Ω ZZ | Higher board density but lower power handling; requires different footprint and layout | Select for space-constrained designs where 300 mW rating is not required |
| BZX84-C22-TP | 22 V Zener, SOT-23 package; 350 mW Ptot; 50 Ω ZZ; ±5% tolerance; RoHS-compliant | Higher power rating than BZT52C22-E3-18 on PCB, but MSL Level 1 not explicitly stated | Prefer when higher thermal margin is needed and SOT-23 placement is acceptable |
Compared with BZT52C22-E3-18, MMBZ5247BS-7-F trades 200 mW power capability and SOT-23 footprint for reduced board area, while BZX84-C22-TP offers 50 mW more dissipation in the same package class but lacks documented MSL Level 1 assurance - impacting moisture-sensitive assembly planning.
Availability
BZT52C22-E3-18 is available at Aetrix Electronics and suitable for industrial sensor interfaces, battery management systems, FPGA power supervision, and USB-C PD protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZT52C22-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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The BZT52 series targets cost-sensitive, high-volume voltage reference and protection applications, emphasizing E24 compatibility, AEC-Q101 qualification options, and robust SOD-123 packaging for automated manufacturing.
FAQ
What is the Zener voltage tolerance for BZT52C22-E3-18?
The BZT52C22-E3-18 has a nominal Zener voltage of 22 V with a tolerance of ±5%, resulting in a guaranteed range of 20.9 V to 23.1 V at 5 mA test current. This tolerance is specified per the international E24 standard and applies under standard ambient conditions (25 °C). The device maintains this specification across its operating temperature range of -55 °C to +150 °C, though voltage drift due to temperature coefficient must be accounted for in precision designs.
Is BZT52C22-E3-18 AEC-Q101 qualified?
No, BZT52C22-E3-18 is not AEC-Q101 qualified. It carries the "E3" suffix, indicating RoHS-compliant commercial-grade construction. For automotive applications requiring AEC-Q101 qualification, the equivalent part is BZT52C22-HE3_A-18, which shares identical electrical specifications but adds stress-tested reliability validation for automotive environments. Always verify qualification status via the full ordering code before deployment in automotive systems.
What is the maximum continuous Zener current for BZT52C22-E3-18 at room temperature?
The maximum admissible Zener current for BZT52C22-E3-18 is 20 mA at ambient temperature of 25 °C, as specified in the "Admissible Zener Current" column of the Electrical Characteristics table. This value decreases linearly with rising ambient temperature - for example, it drops to 17 mA at 45 °C. Exceeding this current risks exceeding the 300 mW power limit on FR-4 board and may cause thermal instability or permanent degradation.
Does BZT52C22-E3-18 have a specified ESD rating?
While the BZT52C22-E3-18 itself is not individually tested for ESD, the base BZT52 series supports ESD capability per AEC-Q101: Human Body Model > 8 kV and Machine Model > 800 V - but only for AEC-Q101-qualified variants (e.g., HE3_A suffix). As a commercial-grade part, BZT52C22-E3-18 does not carry an official ESD rating; system-level ESD protection must be implemented externally if required.
What is the thermal resistance junction-to-ambient for BZT52C22-E3-18 on a standard FR-4 board?
The thermal resistance junction-to-ambient (RthJA) for BZT52C22-E3-18 is 420 K/W when mounted on an FR-4 board using the recommended soldering footprint per JEDEC® 51-3. This value assumes no additional copper pour or thermal vias. With optimized layout (e.g., 1-inch² 2-oz copper pad), RthJA can improve to ~200 K/W, enabling higher sustained power dissipation - but the absolute maximum junction temperature remains 150 °C.
BZT52C22-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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 410 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 17 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
BZT52C22-E3-18 FAQ
1.How can I place an order for BZT52C22-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZT52C22-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 BZT52C22-E3-18 reliable?
The price and inventory of BZT52C22-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 BZT52C22-E3-18 is usually 5 days.
3.What payment methods are accepted for BZT52C22-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT52C22-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZT52C22-E3-18?
BZT52C22-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZT52C22-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 BZT52C22-E3-18?
For technical support, including BZT52C22-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT52C22-E3-18 requirements.
6.How does Aetrix verify that BZT52C22-E3-18 is sourced from the original manufacturer or authorized distributors?
All BZT52C22-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 BZT52C22-E3-18 meets industry standards.
7.What is the process for return or replacement of BZT52C22-E3-18?
All BZT52C22-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with BZT52C22-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 BZT52C22-E3-18 part is unused and in its original packaging.
Return procedure for BZT52C22-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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