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Vishay General Semiconductor - Diodes Division BZX85C22-TAP
- Part No.:
- BZX85C22-TAP
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZX85C22-TAP.pdf
- Description:
- DIODE ZENER 22V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:26,053
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Product details
Overview
BZX85C22-TAP from Vishay is a silicon planar power Zener diode rated for 22 V nominal zener voltage (20.8–23.3 V), 1.3 W power dissipation, and DO-41 glass package. It provides voltage stabilization in power supply regulation, overvoltage protection, and reference circuits with ±5 % tolerance and low dynamic resistance (≤25 Ω at 5 mA).
For engineers reviewing the BZX85C22-TAP datasheet, BZX85C22-TAP pinout, BZX85C22-TAP application, or BZX85C22-TAP equivalent, this part serves as a high-reliability, through-hole discrete solution for industrial power rail clamping, analog reference generation, and DC bias stabilization where thermal stability (αVZ = +0.06 %/°C) and pulse-rated current handling (16 mA max) are critical.
Technical Context
The BZX85C22-TAP operates as a two-terminal voltage reference device with reverse-biased avalanche breakdown. Its zener voltage is specified at IZT = 5 mA, with dynamic resistance rZT ≤ 25 Ω measured at 1 kHz and rZK ≤ 600 Ω at low test current (IZK = 0.5 mA). Temperature coefficient is +0.06 %/°C, indicating positive drift above 6 V.
Thermal performance is defined by RthJA = 130 °C/W (leads held at ambient at 10 mm from case), enabling stable operation up to TJ = 175 °C. Reverse leakage current remains ≤0.5 µA at VR = 17 V, supporting low-power standby modes in precision regulator feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.8–23.3 V at IZT = 5 mA - defines stable regulation range for 22 V nominal rail |
| Power Dissipation (Ptot) | 1.3 W - supports continuous DC or pulsed stabilization in compact PCB layouts |
| Dynamic Resistance (rZT) | ≤25 Ω at 5 mA - ensures minimal output impedance for tight voltage regulation |
| Temperature Coefficient (αVZ) | +0.06 %/°C - predictable positive drift enables compensation in temperature-critical references |
| Reverse Leakage (IR) | ≤0.5 µA at VR = 17 V - negligible quiescent current in high-impedance sensing nodes |
| Max Zener Current (IZ) | 52 mA - sets upper limit for safe continuous conduction without thermal runaway |
| Junction Temperature (Tj) | 175 °C - allows operation in industrial environments with elevated ambient temperatures |
Pinout & Package
DO-41 glass axial package: hermetically sealed, 4.1 mm diameter × 26 mm length, cathode identified by band. Weight ≈ 310 mg. Leads are tinned copper-clad steel, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common; forms return path during zener conduction |
| Cathode | Zener breakdown terminal / regulated output node | Marked with band; supplies stabilized voltage to load when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Enables precise voltage grading per E24 standard and consistent batch-to-batch stability |
| 1.3 W power rating | Supports direct regulation of 12–24 V rails without external heat sinking in moderate-load applications |
| Low rZT (≤25 Ω) | Maintains <1 % output deviation under ±10 mA load transients at nominal current |
| +0.06 %/°C αVZ | Allows predictable linear correction in temperature-compensated reference designs |
| DO-41 glass case | Provides hermetic sealing and long-term reliability in humid or chemically aggressive environments |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing +24 V DC bus in PLC I/O modules with varying load conditions. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing fixed 22 V clamp point in shunt regulator topology. Use Value: Maintains output within ±2 % across -40 to +85 °C ambient using only passive components and no control IC. |
Use Scenario: Protecting microcontroller ADC input against transient surges on sensor signal lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to 23.3 V peak before damage occurs. Use Value: Limits fault energy with ≤25 Ω dynamic impedance, reducing stress on downstream ESD structures. |
| Precision Analog Reference | DC Bias Generator |
Use Scenario: Generating stable 22 V reference for op-amp-based current source in LED driver feedback. IC Role / Device Role / Timing Role: Passive voltage reference establishing accurate setpoint independent of supply variation. Use Value: Delivers <0.5 % regulation error over 1–10 mA operating range due to low rZT and tight VZ tolerance. |
Use Scenario: Setting gate bias voltage for high-side N-channel MOSFET in isolated DC-DC converter. IC Role / Device Role / Timing Role: Fixed-voltage node defining turn-on threshold for level-shifting logic interface. Use Value: Enables reliable MOSFET switching with predictable timing margin thanks to stable 22 V threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5247B | Surface-mount SOD-123 package; 22 V ±5 %; 0.5 W rating; rZT ≤ 35 Ω at 20 mA | Lower power handling and different thermal profile; requires PCB layout change | Select for space-constrained boards where reflow compatibility and smaller footprint outweigh through-hole robustness |
| STMicroelectronics BZT03C22 | DO-41 package; 22 V ±5 %; 1.3 W rating; rZT ≤ 30 Ω at 5 mA; Tj = 175 °C | Nearly identical electrical and mechanical specs; minor differences in leakage (<1 µA @ 17 V) | Drop-in replacement where second-source assurance is required without design revision |
Compared with BZX85C22-TAP, MMBZ5247B offers SMT integration but sacrifices 60 % power capacity, while BZT03C22 matches DO-41 form factor and thermal capability but exhibits slightly higher leakage-making BZX85C22-TAP optimal for high-reliability through-hole stabilization where legacy compatibility and proven field performance are prioritized.
Availability
BZX85C22-TAP is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and precision analog reference designs requiring stable component supply and long-term obsolescence management.
Supply support for BZX85C22-TAP 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, power handling, and precision.
The BZX85-Series was designed specifically for high-power, through-hole Zener stabilization in industrial and automotive power systems where rugged packaging and wide temperature operation are essential.
FAQ
What is the zener voltage tolerance of BZX85C22-TAP?
The BZX85C22-TAP has a nominal zener voltage of 22 V with a tolerance of ±5 %, corresponding to a guaranteed range of 20.8 V to 23.3 V at test current IZT = 5 mA. This grading follows the international E24 standard, and the "C" suffix explicitly denotes the ±5 % variant-distinct from "B"-suffix parts offering ±2 % tolerance.
Can BZX85C22-TAP be used in surface-mount designs?
No, BZX85C22-TAP uses a DO-41 axial glass package intended for through-hole mounting. It is not compatible with SMT assembly processes. For surface-mount equivalents, consider ON Semiconductor's MMBZ5247B or Diodes Inc.'s BZT52C22, both in SOD-123 packages-but note their lower power ratings (0.5 W) and differing thermal characteristics compared to the 1.3 W BZX85C22-TAP.
What is the maximum continuous zener current for BZX85C22-TAP?
The maximum admissible zener current for BZX85C22-TAP is 52 mA under ambient conditions where leads are maintained at 25 °C at 10 mm from the case. This value is derived from Ptot = 1.3 W and VZ ≈ 22 V (IZ = Ptot/VZ ≈ 59 mA), adjusted downward to account for thermal resistance and safe junction temperature limits up to 175 °C.
How does the temperature coefficient affect BZX85C22-TAP performance?
The BZX85C22-TAP has a temperature coefficient αVZ of +0.06 %/°C at IZ = 5 mA, meaning its zener voltage increases by approximately 13.2 mV per °C rise in junction temperature. This predictable positive drift allows designers to compensate in reference circuits-for example, by pairing with a negative-TC component-or to anticipate regulation shift in high-ambient environments.
Is BZX85C22-TAP RoHS compliant and lead-free?
Yes, BZX85C22-TAP complies with RoHS Directive 2011/65/EU and is lead-free. Vishay confirms that no ozone-depleting substances are used in its manufacture, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for through-hole components. Full compliance documentation is available upon request from Aetrix Electronics.
BZX85C22-TAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- BZX85
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 16 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 175°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZX85C22-TAP FAQ
1.How can I place an order for BZX85C22-TAP through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX85C22-TAP 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 BZX85C22-TAP reliable?
The price and inventory of BZX85C22-TAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX85C22-TAP is usually 5 days.
3.What payment methods are accepted for BZX85C22-TAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX85C22-TAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX85C22-TAP?
BZX85C22-TAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX85C22-TAP 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 BZX85C22-TAP?
For technical support, including BZX85C22-TAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX85C22-TAP requirements.
6.How does Aetrix verify that BZX85C22-TAP is sourced from the original manufacturer or authorized distributors?
All BZX85C22-TAP 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 BZX85C22-TAP meets industry standards.
7.What is the process for return or replacement of BZX85C22-TAP?
All BZX85C22-TAP units undergo pre-shipment inspection (PSI). If there is an issue with BZX85C22-TAP, 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 BZX85C22-TAP part is unused and in its original packaging.
Return procedure for BZX85C22-TAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX85C22-TAP Tags
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