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Microchip Technology 1N5231BUR-1E3
- Part No.:
- 1N5231BUR-1E3
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5231BUR-1E3.pdf
- Description:
- DIODE ZENER 5.1V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,810
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Product details
Overview
1N5231BUR-1E3 from Microsemi is a 500 mW surface-mount Zener diode with nominal Zener voltage 5.1 V ±5%, 20 mA test current, 17 Ω dynamic impedance at IZT, and -65 °C to +175 °C operating junction temperature. It delivers precision voltage regulation in compact MELF DO-213AA packaging for power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5231BUR-1E3 datasheet, 1N5231BUR-1E3 pinout, 1N5231BUR-1E3 application, or 1N5231BUR-1E3 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W), reverse leakage (5.0 µA @ 1.9 V), temperature coefficient (+0.030 %/°C), and RoHS-compliant matte-tin plating.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with regulation defined at IZT = 20 mA and VZ = 5.1 V. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050, while the DO-213AA package enables high-reliability surface-mount assembly.
It exhibits low capacitance (typical ~4 pF per Figure 3), minimal ESD sensitivity (MIL-STD-750 Method 1020), and stable regulation across -65 °C to +175 °C. Derating applies above 50 °C ambient or 125 °C end-cap temperature per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 5.1 V ±5% at 20 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation PD | 0.5 W - limits continuous thermal load on PCB; requires derating above 50 °C ambient |
| Dynamic Impedance ZZT | 17 Ω at 20 mA - determines output voltage stability under varying load current |
| Reverse Leakage IR | 5.0 µA at 1.9 V - ensures low quiescent current in standby or low-power monitoring circuits |
| Temp. Coefficient αVZ | +0.030 %/°C - indicates near-zero drift across industrial temperature range |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in harsh environments including aerospace and downhole electronics |
| Thermal Resistance RθJA | 250 °C/W on FR4 (1 oz Cu) - informs heatsinking requirements and board layout for thermal management |
Pinout & Package
DO-213AA (SOD-80 / MLL34) metallurgically bonded glass MELF package with cathode band marking; terminals are solderable end caps with RoHS-compliant matte-tin plating (e3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection during forward bias; regulated output node in reverse bias | Must be held positive relative to anode to achieve 5.1 V regulation; polarity critical for correct circuit function |
| Anode (unbanded end) | Reference ground node in Zener configuration | Serves as return path for regulation current; connects to system ground or feedback node in shunt regulator topologies |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bonding | Enables superior thermal transfer from junction to end cap, supporting reliable 0.5 W operation |
| Radiation hardness (per MicroNote 050) | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
| Low capacitance (~4 pF) | Minimizes signal coupling and noise injection in high-frequency or RF-adjacent circuits |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands >4 kV HBM without parameter shift-reduces need for external ESD protection |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulators or switching converter error amplifiers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.1 V reference for error comparator input. Use Value: Maintains ±5% output accuracy across load and temperature with <17 Ω dynamic impedance. | Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs. IC Role / Device Role / Timing Role: Bidirectional transient suppressor operating in reverse breakdown at 5.1 V. Use Value: Limits voltage excursions to safe levels without significant leakage (<5 µA at 1.9 V). |
| Temperature-Stable Biasing | Aerospace Power Monitoring |
Use Scenario: Generating bias voltages for op-amps or ADC references in wide-temperature systems. IC Role / Device Role / Timing Role: Low-drift voltage source with +0.030 %/°C tempco for analog front-end calibration. Use Value: Enables <±0.5% total variation from -55 °C to +125 °C without active compensation. | Use Scenario: Monitoring bus voltage integrity in satellite power distribution units. IC Role / Device Role / Timing Role: Radiation-hardened Zener used in fault-detection comparators for 5 V rail supervision. Use Value: Guaranteed operation up to +175 °C and TID resilience per MicroNote 050 support mission-critical reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5231B-1 | Same electrical specs but DO-35 axial-leaded package; no RoHS e3 marking | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board compatibility or manual prototyping is required |
| BZX55C5V1 | 5.1 V ±5%, 500 mW, DO-35 package; higher ZZT (30 Ω) and wider tempco (±0.05 %/°C) | Lacks radiation hardness and MIL-PRF-19500 screening options | Choose for cost-sensitive commercial designs where radiation tolerance is not required |
Compared with 1N5231B-1 and BZX55C5V1, the 1N5231BUR-1E3 offers surface-mount compatibility, RoHS compliance, and verified radiation hardness-making it uniquely suited for high-reliability SMT applications where hermetic sealing and extended temperature operation are mandatory.
Availability
1N5231BUR-1E3 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and temperature-stable biasing applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5231BUR-1E3 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.
The 1N52xxBUR-1 series was designed specifically for surface-mount Zener regulation in mission-critical systems demanding hermeticity, wide temperature operation, and MIL-PRF-19500 screening capability.
FAQ
What is the Zener voltage tolerance for 1N5231BUR-1E3?
The 1N5231BUR-1E3 has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, as indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance is guaranteed at 20 mA test current and 25 °C ambient temperature, and remains stable across its full operating temperature range due to its +0.030 %/°C temperature coefficient.
Is 1N5231BUR-1E3 RoHS compliant?
Yes, the "e3" suffix in 1N5231BUR-1E3 explicitly denotes RoHS compliance with annealed matte-tin plating, available for commercial-grade devices only. This version meets EU Directive 2011/65/EU and is compatible with lead-free reflow profiles up to 260 °C for 10 seconds.
What package type does 1N5231BUR-1E3 use?
The 1N5231BUR-1E3 uses the DO-213AA (also known as SOD-80 or MLL34) metallurgically bonded glass MELF package. It features hermetically sealed construction, cathode band marking, and solderable tin-plated end caps-optimized for high-reliability surface-mount assembly on FR4 PCBs.
What is the maximum reverse leakage current for 1N5231BUR-1E3?
The maximum reverse leakage current for 1N5231BUR-1E3 is 5.0 µA measured at 1.9 V reverse voltage (VR) and 25 °C. This low leakage supports energy-efficient operation in battery-powered monitoring circuits and ensures minimal loading on high-impedance reference nodes.
Does 1N5231BUR-1E3 support MIL-PRF-19500 screening?
No-only versions with MQ, MX, MV, or MSP reliability level prefixes (e.g., 1N5231BUR-1MX) are screened to MIL-PRF-19500. The 1N5231BUR-1E3 is a commercial-grade part with RoHS compliance (e3) and is not subjected to military-level testing or qualification, though its base design inherits inherent radiation hardness per MicroNote 050.
1N5231BUR-1E3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bag
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5231BUR-1E3 FAQ
1.How can I place an order for 1N5231BUR-1E3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5231BUR-1E3 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 1N5231BUR-1E3 reliable?
The price and inventory of 1N5231BUR-1E3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5231BUR-1E3 is usually 5 days.
3.What payment methods are accepted for 1N5231BUR-1E3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5231BUR-1E3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5231BUR-1E3?
1N5231BUR-1E3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5231BUR-1E3 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 1N5231BUR-1E3?
For technical support, including 1N5231BUR-1E3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5231BUR-1E3 requirements.
6.How does Aetrix verify that 1N5231BUR-1E3 is sourced from the original manufacturer or authorized distributors?
All 1N5231BUR-1E3 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 1N5231BUR-1E3 meets industry standards.
7.What is the process for return or replacement of 1N5231BUR-1E3?
All 1N5231BUR-1E3 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5231BUR-1E3, 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 1N5231BUR-1E3 part is unused and in its original packaging.
Return procedure for 1N5231BUR-1E3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5231BUR-1E3 Tags
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MM5Z5V1ST1G
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