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Microchip Technology 1N5227BE3/TR
- Part No.:
- 1N5227BE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5227BE3/TR.pdf
- Description:
- DIODE ZENER 3.6V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:2,097
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Product details
Overview
1N5227BE3/TR from Microsemi is a 3.6 V, ±5% 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, 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 1N5227BE3/TR datasheet, 1N5227BE3/TR pinout, 1N5227BE3/TR application, or 1N5227BE3/TR equivalent, key selection criteria include its tight ±5% voltage tolerance (B suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR), and stable temperature coefficient of –0.065 %/°C - critical for thermal drift-sensitive references.
Technical Context
This device operates in reverse-bias breakdown mode with a sharp knee at 20 mA test current, delivering stable regulation across 0.25–20 mA operating range. Its 24 Ω Zener impedance (ZZT) at IZT and 15 Ω at IZK = 0.25 mA ensures minimal output voltage variation under load transients.
The DO-35 glass package provides hermetic sealing, inherent radiation hardness per MicroNote 050, and ESD insensitivity (MIL-STD-750 Method 1020). Thermal resistance is 250 °C/W junction-to-lead at 3/8″ lead length, enabling reliable operation up to 175°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V ±5% (B suffix); defines regulated output voltage under 20 mA test current |
| Power Dissipation | 500 mW at 25°C; derates linearly above 25°C (250 °C/W thermal resistance) |
| Zener Impedance | 24 Ω at IZT = 20 mA; determines AC voltage ripple rejection in regulation circuits |
| Temperature Coefficient | –0.065 %/°C; quantifies voltage drift over temperature - negative sign indicates decreasing VZ with rising T |
| Reverse Current | 100 μA max at VR = 1.0 V; specifies leakage before breakdown onset |
| Forward Voltage | 1.5 V max at IF = 200 mA; relevant for polarity-check or forward-conduction use cases |
| Operating Temperature | –65°C to +175°C; supports aerospace, downhole, and high-reliability industrial environments |
Pinout & Package
DO-35 (DO-204AH) hermetically sealed glass axial-leaded package with cathode indicated by colored 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 | Non-banded end | Connected to lower-potential node; reverse-biased during Zener operation |
| Cathode | Banded end | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N5227B | Guarantees full six-parameter electrical limits (VZ, IR, ZZT, ZZK, αVZ, VF) per JEDEC standard |
| RoHS-compliant plating (e3) | Matte-tin finish meets lead-free assembly requirements without compromising solderability or reliability |
| Tape-and-reel packaging (TR) | Enables automated SMT placement despite axial-leaded form factor - compatible with standard feeders |
| Radiation-hardened design | Inherently hardened per MicroNote 050; suitable for space-qualified and nuclear instrumentation applications |
| ESD-insensitive construction | No special handling required per MIL-STD-750 Method 1020 - simplifies manufacturing and field service |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in discrete linear regulators or TL431-based feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 3.6 V setpoint for error amplifier comparison. Use Value: ±5% tolerance and –0.065 %/°C TC ensure stable output regulation across temperature and line/load variations. |
Use Scenario: Protecting microcontroller I/O pins or sensor inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-acting clamping element diverting excess energy to ground when voltage exceeds 3.6 V. Use Value: Low 24 Ω dynamic impedance minimizes clamping voltage overshoot during fast transients. |
| Low-Power Reference | Current Source Bias |
Use Scenario: Generating stable bias voltages for op-amp comparators or ADC reference dividers in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage source drawing only 20 mA at regulation point, minimizing quiescent current. Use Value: 500 mW rating and –65°C to +175°C range support long-life operation in unregulated environments. |
Use Scenario: Establishing constant-current bias for LEDs or transistor amplifiers using resistor-Zener configuration. IC Role / Device Role / Timing Role: Voltage-controlled current sink defining emitter/base bias points with predictable thermal behavior. Use Value: Negative temperature coefficient compensates for transistor VBE drift, improving overall bias stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5227B-TR | Same electrical specs and DO-35 package; lacks e3 RoHS suffix - uses traditional tin-lead plating | Not suitable for lead-free assembly; otherwise identical performance and mounting | Select when legacy Pb-based soldering processes are used and RoHS compliance is not required |
| MM3Z3V6B | Surface-mount SOD-323 package; same 3.6 V ±5%, but 300 mW rating and higher 40 Ω ZZT | Requires PCB redesign for SMT footprint; lower power and higher impedance limit high-precision use | Choose for space-constrained designs where board area is prioritized over thermal robustness or low-impedance regulation |
Compared with 1N5227BE3/TR, 1N5227B-TR offers identical regulation performance without RoHS compliance, while MM3Z3V6B trades package compatibility and thermal resilience for miniaturization - making the 1N5227BE3/TR optimal for high-reliability through-hole applications requiring full environmental ruggedness.
Availability
1N5227BE3/TR is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and low-power reference applications requiring stable component supply, extended temperature operation, and RoHS-compliant manufacturing.
Supply support for 1N5227BE3/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-temperature analog and mixed-signal components.
The 1N52xxB series was designed for precision voltage regulation in aerospace, defense, and industrial systems where long-term stability, wide temperature operation, and JEDEC-standardized parametric guarantees are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5227BE3/TR?
The 1N5227BE3/TR has a nominal Zener voltage of 3.6 V with a guaranteed tolerance of ±5%, indicated by the "B" suffix per JEDEC specification. This tolerance applies across the full operating temperature range of –65°C to +175°C and is verified at 20 mA test current under stabilized thermal conditions.
Does the 1N5227BE3/TR support lead-free soldering processes?
Yes, the 1N5227BE3/TR is RoHS-compliant and features annealed matte-tin plating that meets lead-free soldering requirements. It withstands solder temperatures up to 260°C for 10 seconds, fully compatible with standard reflow and wave soldering profiles for Pb-free assembly.
What is the maximum power dissipation of the 1N5227BE3/TR at 75°C ambient?
At 75°C ambient temperature, the 1N5227BE3/TR's power dissipation must be derated from its 500 mW rating at 25°C. With a thermal resistance of 310°C/W junction-to-ambient on FR4, the allowable power drops to approximately 345 mW - calculated as 500 mW × (1 – (75 – 25)/250).
How is polarity identified on the 1N5227BE3/TR?
The cathode of the 1N5227BE3/TR is marked by a visible color band on the glass body; the banded end must be held at a higher potential than the non-banded (anode) end for proper Zener regulation. Reversing polarity subjects the device to forward conduction with a maximum 1.5 V drop at 200 mA.
Is the 1N5227BE3/TR suitable for high-reliability aerospace applications?
Yes, the 1N5227BE3/TR is inherently radiation-hardened per MicroNote 050 and supports military screening levels (e.g., JANTXV) when ordered with appropriate prefixes. Its –65°C to +175°C operating range, hermetic DO-35 package, and JEDEC-registered six-parameter validation make it qualified for aerospace and defense systems.
1N5227BE3/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:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 µA @ 1 V
- 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)
1N5227BE3/TR FAQ
1.How can I place an order for 1N5227BE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5227BE3/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 1N5227BE3/TR reliable?
The price and inventory of 1N5227BE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5227BE3/TR is usually 5 days.
3.What payment methods are accepted for 1N5227BE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5227BE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5227BE3/TR?
1N5227BE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5227BE3/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 1N5227BE3/TR?
For technical support, including 1N5227BE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5227BE3/TR requirements.
6.How does Aetrix verify that 1N5227BE3/TR is sourced from the original manufacturer or authorized distributors?
All 1N5227BE3/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 1N5227BE3/TR meets industry standards.
7.What is the process for return or replacement of 1N5227BE3/TR?
All 1N5227BE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5227BE3/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 1N5227BE3/TR part is unused and in its original packaging.
Return procedure for 1N5227BE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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