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Microchip Technology 1N5267BUR-1/TR
- Part No.:
- 1N5267BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5267BUR-1/TR.pdf
- Description:
- DIODE ZENER 75V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,729
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Product details
Overview
1N5267BUR-1/TR from Microsemi is a surface-mount 75 V, 500 mW Zener diode in DO-213AA (SOD-80/MELF) package with ±5% tolerance, 1.7 mA test current, and 270 Ω dynamic impedance at IZT; used for precision voltage regulation in power supply feedback, reference, and overvoltage protection circuits.
For engineers reviewing the 1N5267BUR-1/TR datasheet, 1N5267BUR-1/TR pinout, 1N5267BUR-1/TR application, or 1N5267BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (100 °C/W junction-to-end-cap), low leakage (<0.1 µA @ 53 V), hermetic glass packaging, and RoHS-compliant commercial-grade availability.
Technical Context
This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 75 V at 1.7 mA test current (IZT) and exhibits a positive temperature coefficient of +0.098 %/°C - typical for Zeners above 6 V. Its metallurgically bonded glass construction ensures stable breakdown characteristics across -65 °C to +175 °C junction temperature range.
Designed for surface-mount use on FR4 PCBs with recommended footprint, it delivers 500 mW steady-state power dissipation at end-cap temperature <125 °C and features minimal capacitance (≈1.5 pF, per Figure 3), supporting high-frequency stability in analog reference and sensing applications.
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 voltage references. |
| Power Dissipation (PD) | 0.5 W - limits continuous operating current to ~6.7 mA at 75 V without derating. |
| Dynamic Impedance (ZZT) | 270 Ω at IZT = 1.7 mA - determines regulation stiffness and output voltage variation under load changes. |
| Reverse Leakage (IR) | <0.1 µA at 53 V - ensures negligible error current in high-impedance reference paths. |
| Temp. Coefficient (αVZ) | +0.098 %/°C - quantifies drift magnitude; requires compensation in precision temperature-stable designs. |
| Junction Temp Range | -65 °C to +175 °C - enables operation in harsh industrial, aerospace, and downhole environments. |
| Thermal Resistance (RθJEC) | 100 °C/W - defines end-cap cooling requirement; mandates thermal pad or heatsinking for sustained full-power use. |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry and cathode band marking; terminals are solderable end caps (tin-lead or RoHS matte-tin plating); no polarity-specific PCB orientation required beyond cathode band alignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Regulated Output Node | Connected to higher-potential side in Zener configuration; carries full regulation current and defines VZ drop relative to anode. |
| Anode End Cap | Reference Ground Node | Connected to lower-potential side (e.g., ground or return path); completes reverse-bias circuit and establishes current return path. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Eliminates interfacial delamination risk under thermal cycling, ensuring long-term parameter stability in mission-critical systems. |
| Hermetic DO-213AA package | Prevents moisture ingress and contamination, enabling reliable operation in humid, corrosive, or high-reliability mil-aero environments. |
| RoHS-compliant commercial grade | Meets EU RoHS Directive 2011/65/EU (e3 suffix) without compromising electrical performance or thermal robustness. |
| ESD insensitivity (MIL-STD-750 Method 1020) | Withstands >4 kV HBM ESD events without parameter shift - simplifies handling and eliminates need for special ESD controls in assembly. |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for low-dose space and nuclear instrumentation applications without additional shielding. |
Applications
| Power Supply Feedback Regulation | High-Voltage Reference Source |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled TL431 alternatives. IC Role / Device Role / Timing Role: Zener reference element setting precise error amplifier threshold in secondary-side regulation loop. Use Value: 75 V rating allows direct sensing of higher bus voltages (e.g., 48 V or 60 V systems) without resistive divider scaling, reducing component count and noise susceptibility. | Use Scenario: Providing stable bias voltage for high-voltage op-amp inputs, ADC reference dividers, or sensor excitation in industrial measurement systems. IC Role / Device Role / Timing Role: Precision voltage reference node in ratiometric or absolute measurement chains requiring low-drift, low-leakage sources. Use Value: Sub-0.1 µA leakage at 53 V and +0.098 %/°C tempco enable microamp-level current sourcing with <0.1% total error over 0–70 °C ambient. |
| Overvoltage Clamp Protection | Programmable Threshold Detector |
Use Scenario: Protecting downstream ICs (e.g., microcontrollers, gate drivers) from transient surges on 48 V or 60 V DC rails in automotive body electronics or telecom power modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp activated when rail exceeds 75 V, diverting surge energy to ground before damage occurs. Use Value: 270 Ω ZZT and 0.5 W rating allow clamping of short-duration transients up to ~100 mA peak without thermal runaway or parameter shift. | Use Scenario: Setting trip point for comparator-based undervoltage lockout (UVLO) or overvoltage detection in battery management systems monitoring 48 V Li-ion stacks. IC Role / Device Role / Timing Role: Fixed threshold reference input to comparator, defining exact activation voltage for system enable/disable logic. Use Value: ±5% tolerance and minimal capacitance (~1.5 pF) ensure fast, jitter-free threshold detection with no RC delay or signal coupling artifacts. |
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/TR | Same 75 V, ±5%, DO-35 axial package; RθJA = 500 °C/W vs. 250 °C/W for DO-213AA; no hermetic seal. | Suitable for through-hole prototyping or legacy board rework; less thermally efficient and less robust in humid environments. | Select when axial mounting is required or when cost sensitivity outweighs thermal/radiation performance needs. |
| BZX55-C75-TAP | 75 V, ±5%, DO-35; 500 mW rating; non-hermetic epoxy package; RθJA ≈ 500 °C/W; no MIL-PRF-19500 screening option. | Lower-cost commercial alternative; lacks radiation hardness, ESD immunity, and hermetic reliability for critical systems. | Choose for cost-driven consumer or industrial applications where environmental stress and long-term stability are not primary concerns. |
Compared with 1N5267B-1/TR and BZX55-C75-TAP, the 1N5267BUR-1/TR offers superior thermal performance (RθJEC = 100 °C/W), hermetic reliability, and inherent radiation hardness - making it the preferred choice for high-reliability, high-temperature, or space-constrained SMT designs demanding long-term parametric stability.
Availability
1N5267BUR-1/TR is available at Aetrix Electronics and suitable for power supply feedback regulation, high-voltage reference sourcing, and overvoltage clamp protection requiring stable component supply, consistent Zener voltage accuracy, and hermetic packaging integrity.
Supply support for 1N5267BUR-1/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and precision analog components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series belongs to Microsemi's legacy Zener regulator product line, engineered specifically for surface-mount applications demanding hermetic sealing, wide temperature operation, and MIL-PRF-19500 compliance in mission-critical systems.
FAQ
What is the Zener voltage tolerance and test current for the 1N5267BUR-1/TR?
The 1N5267BUR-1/TR has a nominal Zener voltage of 75 V with a ±5% tolerance, verified at a test current (IZT) of 1.7 mA. This tolerance corresponds to the "B" suffix in the part nomenclature and is guaranteed across the full operating temperature range of -65 °C to +175 °C.
Does the 1N5267BUR-1/TR have RoHS compliance, and how is it indicated?
Yes, the 1N5267BUR-1/TR is RoHS compliant (lead-free) for commercial-grade versions, denoted by the "e3" suffix in the full part number (e.g., 1N5267BUR-1(e3)/TR). RoHS compliance applies only to commercial variants; military-screened versions (e.g., JAN, JANTX) are exempt and contain leaded terminations.
What is the maximum power dissipation and thermal resistance specification for the 1N5267BUR-1/TR?
The 1N5267BUR-1/TR has a steady-state power dissipation (PD) of 0.5 W at end-cap temperature <125 °C. Its thermal resistance junction-to-end-cap (RθJEC) is 100 °C/W, and junction-to-ambient (RθJA) is 250 °C/W when mounted on a standard FR4 board with 1 oz copper and the recommended footprint.
How does the temperature coefficient of the 1N5267BUR-1/TR affect its performance in precision circuits?
The 1N5267BUR-1/TR has a positive temperature coefficient of +0.098 %/°C, meaning its Zener voltage increases by approximately 73.5 mV per °C rise at 75 V. In precision reference applications, this drift must be compensated via circuit design (e.g., complementary tempcos or calibration) to maintain sub-0.1% stability over temperature.
Is the 1N5267BUR-1/TR suitable for high-reliability or radiation-exposed environments?
Yes, the 1N5267BUR-1/TR is inherently radiation-hardened per Microsemi MicroNote 050 and supports up-screening to MIL-PRF-19500 standards. Its hermetically sealed DO-213AA package and metallurgical bond structure make it suitable for aerospace, nuclear instrumentation, and other high-reliability applications exposed to ionizing radiation or extreme thermal cycling.
1N5267BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- 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/TR FAQ
1.How can I place an order for 1N5267BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5267BUR-1/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 1N5267BUR-1/TR reliable?
The price and inventory of 1N5267BUR-1/TR 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/TR is usually 5 days.
3.What payment methods are accepted for 1N5267BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5267BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5267BUR-1/TR?
1N5267BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5267BUR-1/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 1N5267BUR-1/TR?
For technical support, including 1N5267BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5267BUR-1/TR requirements.
6.How does Aetrix verify that 1N5267BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5267BUR-1/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 1N5267BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5267BUR-1/TR?
All 1N5267BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5267BUR-1/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 1N5267BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5267BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5267BUR-1/TR Tags
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