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Microchip Technology 1N5267BUR-1
- Part No.:
- 1N5267BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5267BUR-1.pdf
- Description:
- DIODE ZENER 75V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,459
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Product details
Overview
1N5267BUR-1 from Microsemi is a 75 V, 500 mW surface-mount Zener diode in a DO-213AA (SOD80/MLL34) MELF glass package with ±5% tolerance, 1.7 mA test current, and 270 Ω dynamic impedance at IZT; used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5267BUR-1 datasheet, 1N5267BUR-1 pinout, 1N5267BUR-1 application, or 1N5267BUR-1 equivalent, key selection criteria include Zener voltage accuracy, temperature coefficient (+0.098 %/°C), low leakage (<0.1 µA @ 53 V), hermetic glass packaging, and MIL-PRF-19500 upscreening capability.
Technical Context
This device operates as a reverse-biased voltage reference with breakdown initiated at 75 V under 1.7 mA test current; its metallurgically bonded glass construction ensures stable long-term regulation and radiation hardness per MicroNote 050.
It exhibits a positive temperature coefficient of +0.098 %/°C above 6 V, minimal junction capacitance (typ. <2 pF), and is rated for junction temperatures from –65 °C to +175 °C with 250 °C/W thermal resistance to ambient on FR4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at 1.7 mA - defines precise regulation point for feedback loops and clamping thresholds |
| Power Dissipation (PD) | 500 mW - supports stable operation in compact SMT layouts without forced cooling |
| Dynamic Impedance (ZZT) | 270 Ω at IZT - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | <0.1 µA at 53 V - ensures negligible error current in high-impedance reference paths |
| Temp. Coefficient (αVZ) | +0.098 %/°C - enables predictable drift compensation in wide-temperature industrial designs |
| Junction Temp. Range | –65 °C to +175 °C - suitable for aerospace, downhole, and military environments |
| Forward Voltage (VF) | 1.1 V max @ 200 mA - allows use as forward-biased clamp or ESD protection element |
Pinout & Package
DO-213AA (SOD80/MLL34) MELF glass package: hermetically sealed, metallurgically bonded, cathode band marked, end-cap terminals only - no leads or pads; polarity defined by banded end (cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Regulated Output Terminal | Connected to higher-potential node during Zener operation; carries full regulator current |
| Anode End Cap | Reference Ground Terminal | Bias return path; must be held at lower potential than cathode for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic Glass Encapsulation | Eliminates moisture ingress and parameter drift over decades in harsh environments |
| Metallurgical Bond Construction | Enables radiation hardness (per MicroNote 050) and high-reliability operation in space-grade systems |
| MIL-PRF-19500 Up-Screening Option | Supports qualification to military screening levels (JAN/JANTX/JANTXV/JANS) via suffix coding |
| Low Capacitance | Typical <2 pF - preserves signal integrity in RF bias networks and fast transient suppression |
| ESD Insensitivity | Non-sensitive per MIL-STD-750 Method 1020 - simplifies handling and eliminates ESD protection circuitry |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener reference providing fixed 75 V threshold to optocoupler input or TL431 comparator. Use Value: Enables accurate output voltage control within ±1% across –40 °C to +125 °C ambient with no external trimming. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 53 V. IC Role / Device Role / Timing Role: Reverse-biased shunt clamp diverting excess energy to ground before damage occurs. Use Value: Limits peak voltage to 75 V with sub-µA leakage, preserving signal integrity during normal operation. |
| High-Temp Sensor Biasing | Radiation-Hardened Reference |
Use Scenario: Providing stable excitation voltage to RTD or thermistor bridges in engine control units. IC Role / Device Role / Timing Role: Precision voltage source maintaining constant current through sensing elements. Use Value: Delivers 75 V reference with +0.098 %/°C drift - enabling calibrated compensation over –55 °C to +175 °C. | Use Scenario: Serving as primary voltage reference in satellite power management subsystems. IC Role / Device Role / Timing Role: Radiation-tolerant Zener establishing system-level regulation independent of TID effects. Use Value: Maintains regulation accuracy after 100 krad(Si) exposure per MicroNote 050, eliminating need for shielding or redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5267B-1 | Same 75 V rating and DO-35 axial package; lacks hermetic MELF construction and MIL-PRF-19500 upscreening option | Suitable for commercial PCB-through-hole assembly; not qualified for high-reliability or surface-mount production | Select 1N5267B-1 only when axial leaded form factor and lower cost outweigh hermeticity and screening needs |
| MMBZ5267B | 75 V SOT-23 package; 225 mW rating; 350 Ω ZZT; RoHS-compliant but non-hermetic plastic encapsulation | Used in consumer-grade portable electronics where size and cost dominate; not radiation-hard or MIL-spec compatible | Choose MMBZ5267B for space-constrained, low-power commercial designs requiring JEDEC-standard SMT footprint |
Compared with 1N5267B-1 and MMBZ5267B, the 1N5267BUR-1 uniquely combines hermetic glass packaging, MIL-PRF-19500 upscreening eligibility, and radiation hardness - making it the only choice for aerospace, defense, and downhole instrumentation where long-term parametric stability is non-negotiable.
Availability
1N5267BUR-1 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and high-temperature sensor biasing applications requiring stable component supply across extended lifecycle programs.
Supply support for 1N5267BUR-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) specialized in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in hermetic surface-mount form, targeting applications demanding radiation tolerance, extreme temperature operation, and long-term calibration stability.
FAQ
What is the Zener voltage tolerance for 1N5267BUR-1?
The 1N5267BUR-1 has a nominal Zener voltage of 75 V with a ±5% tolerance, indicated by the "B" suffix in the part number per Microsemi's nomenclature. This means the actual measured VZ falls between 71.25 V and 78.75 V at 1.7 mA test current and 25 °C ambient. Tighter tolerances (±2%, ±1%) are available under different suffixes but are not applicable to the 1N5267BUR-1 variant.
Does 1N5267BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5267BUR-1 is eligible for up-screening per MIL-PRF-19500 specifications - including JAN, JANTX, JANTXV, and JANS levels - via appropriate reliability level suffixes (e.g., MQ, MX, MV, MSP). The base 1N5267BUR-1 is commercial grade, but the same die and package architecture supports these military qualifications when ordered with corresponding screening codes.
What is the maximum operating temperature for 1N5267BUR-1?
The 1N5267BUR-1 has a specified junction and storage temperature range of –65 °C to +175 °C. Its steady-state power dissipation is derated above 50 °C ambient (or 125 °C end cap temperature) per Figure 2 in the datasheet. At 75 °C ambient, the usable power drops to approximately 375 mW due to thermal resistance of 250 °C/W on FR4 board.
Is 1N5267BUR-1 RoHS compliant?
RoHS-compliant versions of 1N5267BUR-1 are available for commercial-grade orders only, designated by the "e3" suffix (e.g., 1N5267BUR-1e3). These use annealed matte-tin plating instead of tin-lead. Non-RoHS versions retain the standard tin-lead finish. Both comply with solderability requirements per MIL-STD-750 Method 2026.
What package type does 1N5267BUR-1 use?
The 1N5267BUR-1 uses the DO-213AA package - also known as SOD80 or MLL34 - a hermetically sealed glass MELF (Metal Electrode Leadless Face) surface-mount configuration. It features two end-cap terminals, cathode identified by a single band, and weighs 0.04 grams. Dimensions are A = 1.60–1.70 mm diameter, B = 3.30–3.70 mm length.
1N5267BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 270 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 56 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
1N5267BUR-1 FAQ
1.How can I place an order for 1N5267BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5267BUR-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 1N5267BUR-1 reliable?
The price and inventory of 1N5267BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5267BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5267BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5267BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5267BUR-1?
1N5267BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5267BUR-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 1N5267BUR-1?
For technical support, including 1N5267BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5267BUR-1 requirements.
6.How does Aetrix verify that 1N5267BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5267BUR-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 1N5267BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5267BUR-1?
All 1N5267BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5267BUR-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 1N5267BUR-1 part is unused and in its original packaging.
Return procedure for 1N5267BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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