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Vishay General Semiconductor - Diodes Division 1N5222C-TR
- Part No.:
- 1N5222C-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5222C-TR.pdf
- Description:
- DIODE ZENER 2.5V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:5,128
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Product details
Overview
1N5222C-TR from Vishay Semiconductors is a silicon planar Zener diode with 2.5 V nominal Zener voltage, ±2 % tolerance (C-suffix), 500 mW power dissipation, and DO-35 package. It operates at 20 mA test current, exhibits 1250 Ω dynamic resistance at IZT1, and serves as a precision voltage reference in low-power analog circuits.
For engineers reviewing the 1N5222C-TR datasheet, 1N5222C-TR pinout, 1N5222C-TR application, or 1N5222C-TR equivalent, this page delivers verified electrical parameters, thermal behavior, packaging details, and real-world substitution guidance for stable voltage regulation design.
Technical Context
This discrete Zener diode functions as a two-terminal shunt regulator, maintaining stable reverse-biased voltage across its terminals under varying load and supply conditions. Its junction temperature range spans −65 °C to +175 °C, and it achieves thermal equilibrium per DC measurement standards with 9.5 mm lead length.
The device features a negative temperature coefficient of −0.085 %/K at 2.5 V, low forward voltage (1.1 V max at 200 mA), and MSL Level 1 moisture sensitivity-enabling standard reflow without baking. Its DO-35 package supports through-hole mounting with UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.5 V nominal, ±2 % tolerance - ensures tight voltage reference accuracy for calibration and biasing circuits |
| Power Dissipation (Ptot) | 500 mW at TL ≤ 25 °C - defines maximum continuous power handling before thermal derating |
| Test Current (IZT1) | 20 mA - the standardized current at which VZ is specified and dynamic resistance is measured |
| Dynamic Resistance (ZZ) | 1250 Ω at IZT1 - quantifies AC impedance in regulation region; impacts ripple rejection in reference designs |
| Temperature Coefficient (αVZ) | −0.085 %/K - indicates predictable downward drift with rising junction temperature, critical for temp-stable references |
| Reverse Leakage (IR) | 100 μA max at VR = 1 V - limits standby current in high-impedance bias networks |
| Junction-to-Ambient RthJA | 300 K/W - determines thermal rise per watt; guides heatsinking and layout for sustained operation |
Pinout & Package
DO-35 (DO-204AH) glass axial package: cylindrical body with cathode band marking; leads are tinned copper-clad steel, 0.4–0.55 mm diameter, 26 mm minimum length; total weight ≈125 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential rail; forms reference return path in shunt configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input supply via current-limiting resistor; delivers stable 2.5 V to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance (C-suffix) | Enables tighter regulation than ±5 % (B-suffix) variants-reducing need for post-calibration trimming in precision references |
| DO-35 axial glass package | Supports manual prototyping and wave soldering; compatible with legacy through-hole PCB footprints and automated insertion equipment |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow profiles without pre-baking-simplifying manufacturing logistics |
| UL 94 V-0 flammability rating | Meets safety requirements for enclosed industrial and consumer electronics where flame propagation must be suppressed |
| 175 °C maximum junction temperature | Allows reliable operation in high-ambient environments such as automotive engine compartments or sealed power supplies |
Applications
| Industrial Sensor Signal Conditioning | Low-Power Microcontroller Reference |
|---|---|
|
Use Scenario: Providing stable 2.5 V reference for 10-bit ADC inputs in temperature/humidity transmitters operating at 3.3 V supply. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise analog input scaling point for signal chain accuracy. Use Value: ±2 % VZ tolerance and low dynamic resistance minimize gain error and noise coupling into sensitive analog front-ends. |
Use Scenario: Biasing reset threshold circuitry and internal LDO feedback in battery-powered IoT nodes with 2.5 V core logic. IC Role / Device Role / Timing Role: Precision voltage clamp defining brown-out detection level and enabling deterministic wake-up behavior. Use Value: Stable 2.5 V regulation at microamp-level leakage ensures accurate reset assertion across −40 °C to +85 °C ambient range. |
| Linear Power Supply Feedback | ESD-Protected Analog Interface |
|
Use Scenario: Setting output voltage in adjustable linear regulators (e.g., LM317-based supplies) delivering 2.5 V to op-amp rails. IC Role / Device Role / Timing Role: Fixed-voltage reference element in feedback divider network controlling pass transistor conduction. Use Value: 500 mW power rating accommodates typical 1–5 mA bias currents while maintaining thermal stability during load transients. |
Use Scenario: Clamping transient overvoltage on RS-485 receiver inputs in factory automation gateways exposed to cable ESD events. IC Role / Device Role / Timing Role: Low-capacitance (<10 pF typical) shunt protector limiting line voltage to safe levels without distorting data signals. Use Value: Fast Zener breakdown response and 1.1 V forward voltage enable bidirectional clamping with minimal signal distortion at 250 kbps rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C2V4 | 2.4 V nominal, ±5 % tolerance, same DO-35 package, 500 mW rating | Looser voltage tolerance increases system calibration burden; higher leakage (5 μA @ 1 V) affects high-Z bias networks | Select only if cost sensitivity outweighs reference accuracy requirements and board space allows minor layout adjustment for 2.4 V vs. 2.5 V setpoint |
| MMSZ5222T1G | 2.5 V nominal, ±5 % tolerance, SOD-123 surface-mount package, 500 mW rating | Surface-mount form factor enables automated assembly but lacks axial mechanical robustness and thermal mass of DO-35 | Choose for space-constrained PCBs requiring reflow-only assembly; verify thermal relief and pad geometry match SOD-123 footprint |
Compared with BZX55C2V4 and MMSZ5222T1G, the 1N5222C-TR offers superior voltage accuracy (±2 %), proven axial reliability for serviceable designs, and identical power capability-making it optimal for calibration-critical or repair-friendly applications where 2.5 V precision is mandatory.
Availability
1N5222C-TR is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-power microcontroller reference, and linear power supply feedback requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N5222C-TR 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, passive elements, and sensors with emphasis on reliability, precision, and high-volume manufacturability.
The 1N52xx series belongs to Vishay's legacy silicon planar Zener diode product line, engineered for general-purpose voltage regulation and reference applications demanding consistent performance across commercial and industrial temperature ranges.
FAQ
What is the Zener voltage tolerance of the 1N5222C-TR?
The 1N5222C-TR has a nominal Zener voltage of 2.5 V with a guaranteed tolerance of ±2 %, indicated by the "C" suffix in its part number. This tighter tolerance compared to the "B"-suffix variants (±5 %) makes the 1N5222C-TR suitable for applications requiring higher reference accuracy without external trimming. The specification is validated at 20 mA test current under thermal equilibrium conditions.
Can the 1N5222C-TR be used in surface-mount designs?
No-the 1N5222C-TR uses the DO-35 (DO-204AH) axial glass package with radial leads intended for through-hole mounting. For surface-mount equivalents, consider Vishay's MMSZ5222T1G (SOD-123) or MMBZ5222 (SOT-23), though both carry ±5 % tolerance. The 1N5222C-TR itself requires hole drilling and wave or hand soldering.
What is the maximum reverse leakage current for the 1N5222C-TR?
The 1N5222C-TR specifies a maximum reverse leakage current (IR) of 100 μA at VR = 1 V and Tamb = 25 °C. This value is critical for high-impedance bias networks, where excessive leakage could shift operating points. At lower voltages or temperatures, leakage decreases further-ensuring stability in precision analog circuits using the 1N5222C-TR.
Does the 1N5222C-TR require derating above 25 °C ambient?
Yes-the 1N5222C-TR's 500 mW power rating applies only at lead temperature ≤25 °C. Above that, power must be linearly derated at 3.33 mW/°C based on its 300 K/W junction-to-ambient thermal resistance. For example, at 75 °C ambient, maximum allowable dissipation drops to 333 mW. Layouts should ensure adequate lead length (≥9.5 mm) and airflow to maintain thermal performance of the 1N5222C-TR.
Is the 1N5222C-TR RoHS-compliant and halogen-free?
Yes-the 1N5222C-TR complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standard (document 99912). Its DO-35 package uses UL 94 V-0 compliant molding compound and lead finishes meeting JEDEC J-STD-609A Class 1 requirements. Full compliance documentation is available upon request for the 1N5222C-TR.
1N5222C-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.5 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5222C-TR FAQ
1.How can I place an order for 1N5222C-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5222C-TR 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 1N5222C-TR reliable?
The price and inventory of 1N5222C-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5222C-TR is usually 5 days.
3.What payment methods are accepted for 1N5222C-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5222C-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5222C-TR?
1N5222C-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5222C-TR 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 1N5222C-TR?
For technical support, including 1N5222C-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5222C-TR requirements.
6.How does Aetrix verify that 1N5222C-TR is sourced from the original manufacturer or authorized distributors?
All 1N5222C-TR 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 1N5222C-TR meets industry standards.
7.What is the process for return or replacement of 1N5222C-TR?
All 1N5222C-TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5222C-TR, 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 1N5222C-TR part is unused and in its original packaging.
Return procedure for 1N5222C-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5222C-TR Tags
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