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Microchip Technology 1N5227A/TR
- Part No.:
- 1N5227A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5227A/TR.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:3,619
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Product details
Overview
1N5227A/TR from Microsemi is a 3.6 V, ±10% tolerance, 500 mW glass axial-lead Zener diode in DO-35 (DO-204AH) package, rated for 20 mA test current and 24 Ω dynamic impedance at IZT, used for low-power voltage regulation and reference in analog power supplies and signal conditioning circuits.
For engineers reviewing the 1N5227A/TR datasheet, 1N5227A/TR pinout, 1N5227A/TR application, or 1N5227A/TR equivalent, this part serves as a JEDEC-registered, RoHS-compliant (e3), tape-and-reel packaged Zener regulator with verified thermal resistance (310 °C/W on FR4), stable temperature coefficient (−0.065 %/°C), and ESD-insensitive operation per MIL-STD-750 Method 1020.
Technical Context
The 1N5227A/TR operates as a two-terminal reverse-biased voltage reference, maintaining regulation across 0.25–20 mA operating current with minimal capacitance (<2 pF typical) and inherent radiation hardness per MicroNote 050. Its DO-35 glass package enables axial through-hole mounting with cathode band polarity marking.
It delivers stable 3.6 V Zener voltage at 20 mA with 24 Ω dynamic impedance (ZZT) and 15 Ω knee impedance (ZZK at 0.25 mA), exhibiting a negative temperature coefficient of −0.065 %/°C - critical for precision biasing where drift compensation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V @ 20 mA - defines regulated output level for low-voltage reference design |
| Zener Tolerance | ±10% (A suffix) - sets worst-case voltage window (3.24–3.96 V) for supply margining |
| Power Dissipation | 500 mW at 25 °C - limits continuous regulation current to ~139 mA at 3.6 V |
| Zener Impedance | 24 Ω @ IZT - determines AC ripple rejection and load regulation sensitivity |
| Temp Coefficient | −0.065 %/°C - quantifies voltage drift over −65 to +175 °C operating range |
| Reverse Current | 100 μA @ 2.88 V - specifies leakage threshold before regulation onset |
| Forward Voltage | 1.5 V max @ 200 mA - defines conduction loss if forward-biased in protection schemes |
Pinout & Package
Hermetically sealed DO-35 (DO-204AH) glass axial-leaded package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes reference potential for Zener breakdown |
| Cathode | Regulated output node | Banded end; held at stable 3.6 V above anode when reverse-biased above VR |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered DO-35 construction | Ensures mechanical and electrical interchangeability across qualified suppliers |
| RoHS-compliant "e3" option | Enables compliance with environmental directives without performance trade-offs |
| −65 °C to +175 °C operating range | Supports deployment in automotive under-hood and industrial high-temp environments |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly |
| Inherent radiation hardness | Validated per MicroNote 050 for use in space-qualified or high-reliability systems |
Applications
| Low-Voltage Power Supply Reference | Signal-Level Clamp & Protection |
|---|---|
Use Scenario: Providing stable 3.6 V bias for op-amp input stages and ADC reference buffers in battery-powered instrumentation. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precision DC offset. Use Value: Maintains ±10% regulation over 0.25–20 mA current range and −65 to +175 °C, enabling accurate analog front-end calibration. | Use Scenario: Clamping microcontroller I/O pins to prevent overvoltage during hot-swap or ESD events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as bidirectional transient suppressor (with series resistor). Use Value: Limits voltage to ≤3.96 V (max) while drawing <100 μA leakage below 2.88 V - preserving signal integrity without loading. |
| Temperature-Stable Bias Generator | Current Source Setpoint Element |
Use Scenario: Generating bias currents for differential pairs in wide-temperature-range amplifiers. IC Role / Device Role / Timing Role: Zener voltage applied across emitter resistor to set collector current. Use Value: −0.065 %/°C tempco minimizes current drift vs. generic Zeners with >+0.1 %/°C - improving gain stability. | Use Scenario: Setting constant current for LED drivers or sensor excitation in portable medical devices. IC Role / Device Role / Timing Role: Shunt regulator defining voltage across current-setting resistor. Use Value: 24 Ω ZZT ensures <0.1 V variation over 15–25 mA load changes - delivering ±2.8% current accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4728A | 3.3 V nominal, same 500 mW rating and DO-41 package (larger than DO-35) | Lower voltage; requires PCB footprint change due to DO-41 body size and lead spacing | Select when 3.3 V regulation is preferred and board layout allows larger axial package |
| BZX55-C3V6 | 3.6 V, ±5% (C suffix), DO-35 package, but higher ZZT (40 Ω) and different tempco (+0.04 %/°C) | Higher precision tolerance but less stable over temperature; not radiation-hardened | Choose for tighter voltage tolerance where thermal drift is managed externally |
Compared with 1N5227A/TR, 1N4728A offers lower voltage and larger DO-41 packaging, while BZX55-C3V6 provides ±5% tolerance but lacks radiation hardness and exhibits opposite temperature drift - making 1N5227A/TR optimal for high-reliability, wide-temperature, or space-grade designs requiring −0.065 %/°C stability.
Availability
1N5227A/TR is available at Aetrix Electronics and suitable for low-power voltage reference, analog signal clamping, and precision bias generation requiring stable component supply in industrial control, medical instrumentation, and aerospace subsystems.
Supply support for 1N5227A/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-performance analog and mixed-signal components.
The 1N52xx series was designed for general-purpose and high-reliability voltage regulation in military, aerospace, and industrial applications where long-term stability, wide temperature operation, and ESD insensitivity are essential.
FAQ
What is the nominal Zener voltage and tolerance of the 1N5227A/TR?
The 1N5227A/TR has a nominal Zener voltage of 3.6 V with a ±10% tolerance (denoted by the "A" suffix), resulting in a guaranteed regulation range of 3.24 V to 3.96 V at 20 mA test current. This tolerance is JEDEC-specified and verified per Microsemi's characterization data on page 2 of the official datasheet.
What package type and mounting style does the 1N5227A/TR use?
The 1N5227A/TR uses a DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode identified by a color band. It is designed for through-hole mounting with 3/8 inch (10 mm) minimum lead length from the body, and features tin-lead or RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
What is the maximum power dissipation and thermal resistance of the 1N5227A/TR?
The 1N5227A/TR has a maximum power dissipation of 500 mW at 25 °C ambient, derating linearly above that temperature. Its thermal resistance is 310 °C/W junction-to-ambient when mounted on FR4 with 4 mm² copper pads and specified trace geometry, and 250 °C/W junction-to-lead at 3/8 inch lead length - both confirmed in the Maximum Ratings table.
Does the 1N5227A/TR have radiation hardness and ESD immunity?
Yes, the 1N5227A/TR is inherently radiation-hardened per MicroNote 050 and nonsensitive to ESD per MIL-STD-750 Method 1020. These attributes are explicitly stated in the Features section of the Microsemi datasheet and validated for high-reliability applications including aerospace and defense systems.
What does the "TR" suffix indicate in the 1N5227A/TR part number?
The "TR" suffix in 1N5227A/TR indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. This is distinct from bulk or ammo-pack variants and is confirmed in the Mechanical and Packaging section of the Microsemi datasheet under "TAPE & REEL option".
1N5227A/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):
- 3.6 V
- Tolerance:
- ±10%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 950 mV
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N5227A/TR FAQ
1.How can I place an order for 1N5227A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5227A/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 1N5227A/TR reliable?
The price and inventory of 1N5227A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5227A/TR is usually 5 days.
3.What payment methods are accepted for 1N5227A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5227A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5227A/TR?
1N5227A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5227A/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 1N5227A/TR?
For technical support, including 1N5227A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5227A/TR requirements.
6.How does Aetrix verify that 1N5227A/TR is sourced from the original manufacturer or authorized distributors?
All 1N5227A/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 1N5227A/TR meets industry standards.
7.What is the process for return or replacement of 1N5227A/TR?
All 1N5227A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5227A/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 1N5227A/TR part is unused and in its original packaging.
Return procedure for 1N5227A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5227A/TR Tags
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