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Microchip Technology 1N5253BUR-1
- Part No.:
- 1N5253BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5253BUR-1.pdf
- Description:
- DIODE ZENER 25V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,866
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Product details
Overview
1N5253BUR-1 from Microsemi is a 25 V, 500 mW surface-mount Zener diode in DO-213AA (SOD80/MLL34) MELF package with ±5% tolerance, 5.0 Ω dynamic impedance at 20 mA, and -65 °C to +175 °C operating temperature range, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N5253BUR-1 datasheet, 1N5253BUR-1 pinout, 1N5253BUR-1 application, or 1N5253BUR-1 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance, hermetic glass packaging for reliability, and compatibility with automated SMT assembly under 260 °C reflow.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 25 V at 20 mA test current, exhibiting a positive temperature coefficient of +0.089 %/°C and maximum reverse leakage of 0.1 µA at 18.1 V. Its metallurgically bonded glass construction ensures stable breakdown characteristics across wide thermal excursions.
The 1N5253BUR-1 delivers regulated output within ±5% tolerance over its full operating current range (IZK = 0.25 mA to IZM ≈ 50 mA), with thermal resistance junction-to-ambient rated at 250 °C/W on FR4 board - requiring derating above 50 °C ambient or 125 °C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25 V at 20 mA - defines precise regulation point for feedback networks |
| Power Dissipation (PD) | 0.5 W - limits continuous Zener current to ~20 mA at 25 V without heatsinking |
| Dynamic Impedance (ZZT) | 5.0 Ω at 20 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | 0.1 µA at 18.1 V - enables low-power standby operation with negligible quiescent loss |
| Temp. Coefficient (αVZ) | +0.089 %/°C - predictable drift of ~22 mV/°C near 25 V for thermal compensation design |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in aerospace, industrial, and downhole environments |
| Package Type | DO-213AA (SOD80/MLL34) - MELF glass body enabling high reliability and hermetic sealing |
Pinout & Package
DO-213AA (SOD80/MLL34) is a hermetically sealed glass MELF package with two end-cap terminals. Cathode is marked by a single band; polarity must be observed during PCB layout to ensure correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Provides stable 25 V when reverse-biased; connects to feedback divider or load |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bond interface | Ensures robust thermal and electrical connection between silicon die and end caps for stable power handling |
| ESD insensitivity (MIL-STD-750 Method 1020) | Enables handling and assembly without special ESD controls, reducing manufacturing overhead |
| Radiation hardness per MicroNote 050 | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
| RoHS-compliant option (e3 suffix) | Meets EU Directive 2011/65/EU for commercial-grade variants without lead or hazardous substances |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 25 V threshold to TL431 shunt regulator input. Use Value: Tight ±5% VZ tolerance and 5.0 Ω ZZT minimize output voltage error and improve load regulation to ±1.5%. | Use Scenario: Supplies stable bias voltage to bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric ADC excitation in 4–20 mA loop transmitters. Use Value: Low 0.1 µA leakage at 18.1 V prevents loading errors in high-impedance sensor interfaces. |
| Aerospace Power Conditioning | Test Equipment Calibration |
Use Scenario: Provides reference voltage in DC-DC converter modules aboard satellites with extended thermal cycling. IC Role / Device Role / Timing Role: Radiation-hardened Zener element maintaining regulation across -55 °C to +125 °C operational envelope. Use Value: Inherent radiation hardness per MicroNote 050 and -65 °C to +175 °C TJ rating enable qualification for space-grade applications. | Use Scenario: Serves as traceable voltage standard in benchtop multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable 25 V reference source for verifying DMM accuracy against NIST-traceable standards. Use Value: Minimal capacitance (<1.5 pF typical) avoids frequency-dependent errors during AC-coupled calibration signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5253B-1 | Same 25 V/0.5 W spec but in axial DO-35 package; no MELF form factor or hermetic seal | Limited to non-SMT, lower-reliability commercial boards; unsuitable for high-vibration or hermetic assemblies | Select only if through-hole assembly is required and environmental robustness is secondary |
| BZX55C24 | 24 V nominal, ±5% tolerance, 500 mW, DO-35 - differs by 1 V and lacks radiation hardness or MIL-PRF-19500 screening | Not suitable for aerospace or high-reliability applications; requires recalibration of feedback dividers | Acceptable for cost-sensitive consumer power supplies where 24 V vs. 25 V is functionally acceptable |
Compared with 1N5253B-1 and BZX55C24, the 1N5253BUR-1 uniquely combines SMT-compatible MELF packaging, hermetic sealing, radiation hardness, and exact 25 V regulation - making it irreplaceable in high-integrity embedded power systems.
Availability
1N5253BUR-1 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, aerospace power conditioning, and test equipment calibration requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N5253BUR-1 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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener regulation in ruggedized surface-mount form, targeting applications demanding hermeticity, radiation tolerance, and extended temperature operation.
FAQ
What is the Zener voltage tolerance for 1N5253BUR-1?
The 1N5253BUR-1 has a nominal Zener voltage of 25 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix in the part number per Microsemi's nomenclature. This tolerance applies across the full operating temperature range (-65 °C to +175 °C) and current range (0.25 mA to 50 mA), ensuring consistent regulation in precision feedback circuits.
Does 1N5253BUR-1 support RoHS compliance?
Yes, the 1N5253BUR-1 is available in RoHS-compliant versions designated by the "e3" suffix (e.g., 1N5253BUR-1e3), featuring annealed matte-tin plating on end caps. RoHS compliance is offered for commercial-grade units only; military-screened variants retain tin-lead plating per MIL-STD-750.
What is the maximum reverse leakage current for 1N5253BUR-1?
The 1N5253BUR-1 exhibits a maximum reverse leakage current of 0.1 µA at 18.1 V (72% of VZ), measured at 25 °C. This ultra-low leakage enables use in high-impedance reference circuits and battery-powered systems where standby current must remain below 100 nA.
Can 1N5253BUR-1 be used in space-grade applications?
Yes - the 1N5253BUR-1 is inherently radiation-hard per Microsemi MicroNote 050 and supports MIL-PRF-19500 up-screening. When ordered with appropriate reliability level suffixes (e.g., MQ, MX), it meets requirements for low-Earth orbit missions and other space-grade power regulation tasks.
What is the thermal resistance of 1N5253BUR-1 on a standard FR4 board?
The 1N5253BUR-1 has a junction-to-ambient thermal resistance (RθJA) of 250 °C/W when mounted on an FR4 PCB with 1 oz copper and Microsemi's recommended footprint. Derating is required above 50 °C ambient or 125 °C end-cap temperature to maintain safe junction temperatures within the -65 °C to +175 °C limit.
1N5253BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 25 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 19 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5253BUR-1 FAQ
1.How can I place an order for 1N5253BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5253BUR-1 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 1N5253BUR-1 reliable?
The price and inventory of 1N5253BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5253BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5253BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5253BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5253BUR-1?
1N5253BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5253BUR-1 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 1N5253BUR-1?
For technical support, including 1N5253BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5253BUR-1 requirements.
6.How does Aetrix verify that 1N5253BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5253BUR-1 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 1N5253BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5253BUR-1?
All 1N5253BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5253BUR-1, 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 1N5253BUR-1 part is unused and in its original packaging.
Return procedure for 1N5253BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5253BUR-1 Tags
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