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Microchip Technology 1N5223B/TR
- Part No.:
- 1N5223B/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5223B/TR.pdf
- Description:
- DIODE ZENER 2.7V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:9,568
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Product details
Overview
1N5223B/TR from Microsemi is a 2.7 V, ±5% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 1300 Ω dynamic impedance at IZK, operating from –65°C to +175°C. It serves as a precision voltage reference or shunt regulator in low-power analog circuits, power supply feedback paths, and overvoltage protection.
For engineers reviewing the 1N5223B/TR datasheet, 1N5223B/TR pinout, 1N5223B/TR application, or 1N5223B/TR equivalent, key selection factors include its 2.7 V nominal Zener voltage, 5% tolerance, 500 mW power rating, DO-35 mechanical form factor, and temperature coefficient of –0.080 %/°C - all critical for stable low-voltage regulation in industrial and aerospace designs.
Technical Context
This device operates in reverse-bias breakdown mode with a sharp knee at 20 mA test current (IZT), delivering stable regulation across –65°C to +175°C. Its 1300 Ω Zener impedance (ZZT) at IZK = 0.25 mA and 75 Ω impedance (ZZK) confirm low dynamic resistance near knee voltage, supporting accurate reference performance under light-load conditions.
The cathode band identifies polarity, requiring the banded end to be held positive relative to the anode for regulation. Its hermetically sealed glass DO-35 package provides ESD insensitivity (MIL-STD-750 Method 1020), inherent radiation hardness per MicroNote 050, and minimal capacitance - enabling use in noise-sensitive analog and high-reliability environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.7 V @ 20 mA - defines precise regulation point for low-voltage reference circuits |
| Zener Tolerance | ±5% (B suffix) - ensures voltage accuracy within ±0.135 V at 25°C for predictable design margins |
| Power Dissipation | 500 mW at 25°C - supports continuous regulation in compact through-hole layouts without forced cooling |
| Zener Impedance | 1300 Ω @ IZK = 0.25 mA - indicates stable knee behavior for reliable low-current regulation |
| Temp. Coefficient | –0.080 %/°C - enables predictable voltage drift compensation in wide-temperature applications |
| Operating Temp. | –65°C to +175°C - suitable for under-hood automotive, downhole, and military systems |
| Forward Voltage | ≤1.5 V @ 200 mA - ensures robust forward conduction for clamping or dual-mode protection |
Pinout & Package
Hermetically sealed glass DO-35 (DO-204AH) axial-leaded package with cathode identified by a single black band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference return node | Connected to circuit ground or lowest potential point in shunt regulator topology |
| Cathode | Zener regulation output node | Banded end - held at regulated 2.7 V above anode; supplies reference voltage to error amplifiers or comparators |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and thermal interoperability with legacy 1N52xx designs and automated axial insertion equipment |
| RoHS-compliant "e3" option | Enables compliance with environmental directives without sacrificing electrical or thermal performance |
| Radiation-hardened per MicroNote 050 | Supports operation in space, nuclear, and high-altitude applications where total ionizing dose (TID) exposure occurs |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection during handling and assembly in uncontrolled environments |
Applications
| Low-Voltage Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output of linear regulators or switching converter feedback loops where 2.7 V reference stabilizes 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable setpoint for error amplifier comparison. Use Value: Maintains ±5% output accuracy over temperature and load due to tight 2.7 V tolerance and –0.080 %/°C TC. | Use Scenario: Biasing precision analog sensors (e.g., RTDs, strain gauges) requiring stable excitation voltage in factory automation systems. IC Role / Device Role / Timing Role: Low-drift voltage reference source for ratiometric measurement circuits. Use Value: Enables <1% full-scale error over –40°C to +85°C ambient using its specified tempco and wide operating range. |
| Aerospace Voltage Clamp | Legacy Circuit Replacement |
Use Scenario: Protecting avionics input stages against transients in MIL-STD-704 compliant power systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage spikes to ≤2.84 V (2.7 V + 5%). Use Value: Survives –65°C to +175°C extremes and resists radiation-induced parameter shift per MicroNote 050. | Use Scenario: Direct replacement for obsolete 1N5223B parts in fielded military hardware undergoing component refresh. IC Role / Device Role / Timing Role: Drop-in functional and mechanical substitute maintaining identical DO-35 footprint and electrical specs. Use Value: Eliminates redesign effort while meeting JAN/JANTX screening requirements when ordered with MQ/MX prefix options. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5223B (no TR) | Identical electrical specs and DO-35 package; differs only in packaging - bulk vs. tape-and-reel | No difference in circuit function; reel format required for automated SMT placement with axial-lead feeders | Select 1N5223B/TR when volume production demands EIA-296 tape-and-reel delivery |
| MMBZ5223BS-7-F | Surface-mount SOD-123 package, same 2.7 V/±5%/500 mW specs; 1.5 pF typical capacitance vs. DO-35's ~2 pF | Requires PCB layout change; suited for space-constrained or mixed-technology boards | Choose MMBZ5223BS-7-F only if board real estate or assembly process mandates SMT |
Compared with 1N5223B/TR, the bulk 1N5223B offers identical performance but lacks tape-and-reel convenience for high-volume pick-and-place, while MMBZ5223BS-7-F delivers equivalent regulation in SMT form - making 1N5223B/TR optimal for through-hole production lines needing verified reel logistics.
Availability
1N5223B/TR is available at Aetrix Electronics and suitable for low-voltage reference design, aerospace transient suppression, and industrial sensor biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5223B/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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for aerospace, defense, and industrial markets.
The 1N52xxB series belongs to Microsemi's legacy DO-35 Zener diode product line, engineered for precision voltage regulation in mission-critical systems where wide temperature operation, ESD immunity, and long-term stability are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5223B/TR?
The 1N5223B/TR has a nominal Zener voltage of 2.7 V at 20 mA test current (IZT), with a guaranteed tolerance of ±5% indicated by the "B" suffix. This means its actual regulation voltage falls between 2.565 V and 2.835 V at 25°C under specified test conditions, making it suitable for precision low-voltage reference applications where tight initial accuracy is required.
What package type and mounting style does the 1N5223B/TR use?
The 1N5223B/TR uses a hermetically sealed glass DO-35 (also designated DO-204AH) axial-leaded package. It features flexible through-hole mounting with leads plated in tin-lead or RoHS-compliant matte tin, solderable per MIL-STD-750 Method 2026. The cathode is marked by a single black band on the glass body.
Does the 1N5223B/TR meet RoHS requirements?
Yes - the "e3" suffix in the full ordering code (e.g., 1N5223B-e3/TR) denotes RoHS compliance. The base 1N5223B/TR may ship with either traditional tin-lead or RoHS-compliant matte-tin plating depending on manufacturing lot; Aetrix Electronics guarantees RoHS-compliant material documentation upon request for all e3-suffixed orders.
What is the maximum power dissipation and thermal derating behavior of the 1N5223B/TR?
The 1N5223B/TR is rated for 500 mW power dissipation at 25°C ambient. Its thermal resistance is 250°C/W junction-to-lead (at 3/8″ lead length) and 310°C/W junction-to-ambient on FR4 board. Derating begins linearly above 25°C, reaching zero power at approximately 125°C case temperature - consistent with Figure 1 in the Microsemi datasheet.
Can the 1N5223B/TR be used in high-reliability aerospace applications?
Yes - the 1N5223B/TR is inherently radiation-hardened per MicroNote 050 and qualified to MIL-PRF-19500 screening levels (JAN, JANTX, JANTXV, JANS) when ordered with appropriate prefixes (MQ, MX, MV, MSP). Its –65°C to +175°C operating range, ESD insensitivity, and hermetic glass package make it suitable for satellite, avionics, and downhole tool applications.
1N5223B/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 75 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5223B/TR FAQ
1.How can I place an order for 1N5223B/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5223B/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 1N5223B/TR reliable?
The price and inventory of 1N5223B/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5223B/TR is usually 5 days.
3.What payment methods are accepted for 1N5223B/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5223B/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5223B/TR?
1N5223B/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5223B/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 1N5223B/TR?
For technical support, including 1N5223B/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5223B/TR requirements.
6.How does Aetrix verify that 1N5223B/TR is sourced from the original manufacturer or authorized distributors?
All 1N5223B/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 1N5223B/TR meets industry standards.
7.What is the process for return or replacement of 1N5223B/TR?
All 1N5223B/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5223B/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 1N5223B/TR part is unused and in its original packaging.
Return procedure for 1N5223B/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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