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Microchip Technology 1N5273BUR-1
- Part No.:
- 1N5273BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5273BUR-1.pdf
- Description:
- DIODE ZENER 120V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,063
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Product details
Overview
1N5273BUR-1 from Microsemi is a 120 V, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) package with ±5% voltage tolerance, 1.0 mA test current, and +0.110 %/°C temperature coefficient. It regulates voltage in precision reference and overvoltage protection circuits across industrial power supplies and aerospace instrumentation.
For engineers reviewing the 1N5273BUR-1 datasheet, 1N5273BUR-1 pinout, 1N5273BUR-1 application, or 1N5273BUR-1 equivalent, key selection criteria include Zener voltage stability at elevated temperatures, low leakage (<0.1 µA @ 91 V), 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, maintaining regulation at 120 V nominal with dynamic impedance of 900 Ω at 1.0 mA test current and 4000 Ω near the knee (IZK = 0.25 mA). Its metallurgically bonded glass construction ensures stable junction characteristics over -65 °C to +175 °C operating range.
Designed per MIL-PRF-19500 screening standards (commercial grade), it delivers radiation hardness per MicroNote 050 and ESD immunity per MIL-STD-750 Method 1020. The cathode band marking defines polarity for operation with banded end positive during Zener breakdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 120 V ±5% at IZT = 1.0 mA - sets precise regulation point for high-voltage references |
| Power Dissipation (PD) | 0.5 W - limits thermal rise on FR4 PCBs with 250 °C/W junction-to-ambient resistance |
| Dynamic Impedance (ZZT) | 900 Ω at IZT = 1.0 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | <0.1 µA at VR = 91 V - ensures minimal quiescent current in standby mode |
| Temp. Coefficient (αVZ) | +0.110 %/°C - quantifies voltage drift over temperature; requires compensation in wide-range designs |
| Junction Temp. Range | -65 °C to +175 °C - supports operation in harsh environments including avionics and downhole tools |
| Forward Voltage (VF) | 1.1 V max at IF = 200 mA - defines forward conduction loss when used bidirectionally |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with two end-cap terminals. Cathode identified by black band; anode is unmarked end. RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener regulation terminal | Connected to higher potential during reverse breakdown; defines polarity for 120 V reference generation |
| Anode (unmarked end) | Reference ground node | Serves as circuit common; must be held at lower potential than cathode for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgical bonding | Ensures mechanical robustness and thermal stability under thermal cycling stress |
| MIL-PRF-19500 screening option | Enables qualification for military/aerospace applications requiring extended reliability testing |
| Radiation hardness (per MicroNote 050) | Supports use in space-grade systems where total ionizing dose (TID) resilience is critical |
| Low capacitance (typ. <1.5 pF) | Minimizes signal coupling in RF bias networks and high-frequency reference filtering |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback loop in 100–150 V DC-DC converter secondary side. IC Role / Device Role / Timing Role: Precision 120 V Zener reference providing error amplifier setpoint. Use Value: Maintains ±0.6 V regulation accuracy over -40 °C to +85 °C ambient with <0.1 µA leakage. | Use Scenario: Overvoltage protection in satellite power bus monitoring circuitry. IC Role / Device Role / Timing Role: Clamping transient spikes above 120 V to safeguard downstream ADC inputs. Use Value: Radiation-hardened construction prevents parametric shift after 100 krad(Si) exposure. |
| Test Equipment Calibration Standard | Downhole Oilfield Sensor Bias |
Use Scenario: Fixed reference in portable multimeter high-voltage range calibration. IC Role / Device Role / Timing Role: Stable 120 V source for DMM auto-ranging circuit verification. Use Value: ±5% initial tolerance and +0.110 %/°C TC enable traceable 6-month calibration intervals. | Use Scenario: Biasing high-temperature pressure transducers in geothermal drilling tools. IC Role / Device Role / Timing Role: High-temperature-stable Zener providing excitation voltage for Wheatstone bridge. Use Value: Operates continuously at +175 °C junction temperature without parameter degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5273B-1 | Same electrical specs but in axial DO-35 (DO-204AH) package; no MELF form factor | Requires through-hole PCB layout; unsuitable for high-density SMT assemblies | Select when legacy board repair or manual prototyping demands axial leaded form |
| BZX85C120 | 120 V, 1.3 W rating; 100 Ω ZZT; wider ±10% tolerance; plastic DO-41 package | Higher power handling but lower temperature stability and no radiation hardness | Select for cost-sensitive commercial power supplies where radiation or extreme temp not required |
Compared with 1N5273BUR-1, the 1N5273B-1 offers identical regulation performance in axial format but lacks SMT compatibility, while BZX85C120 trades hermetic reliability and temperature coefficient for higher power and lower cost in non-critical environments.
Availability
1N5273BUR-1 is available at Aetrix Electronics and suitable for industrial power supply reference, aerospace voltage clamp, and test equipment calibration standard applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N5273BUR-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 1N5273BUR-1 belongs to Microsemi's legacy 1N52xxBUR-1 Zener series designed for high-stability, hermetically sealed voltage regulation in mission-critical systems where long-term parameter consistency and environmental resilience are mandatory.
FAQ
What is the Zener voltage tolerance for 1N5273BUR-1?
The 1N5273BUR-1 has a nominal Zener voltage of 120 V with a ±5% tolerance, corresponding to the "B" suffix in its nomenclature. This means the actual measured VZ falls between 114 V and 126 V at IZT = 1.0 mA and TA = 25 °C. Tighter tolerances (±2%, ±1%) are available under different suffixes (C, D), but 1N5273BUR-1 specifically uses the B-grade specification.
Does 1N5273BUR-1 support RoHS compliance?
Yes, the 1N5273BUR-1 is available in RoHS-compliant versions marked with the "e3" suffix (e.g., 1N5273BUR-1e3), featuring annealed matte-tin plating on end caps. RoHS compliance applies only to commercial-grade units; screened versions for MIL-PRF-19500 do not carry RoHS certification.
What is the maximum steady-state power dissipation for 1N5273BUR-1?
The 1N5273BUR-1 has a rated steady-state power dissipation of 0.5 W. This value assumes mounting on an FR4 PCB with 1 oz copper and adherence to the recommended footprint. Derating is required above 50 °C ambient or if end cap temperature exceeds 125 °C, per the thermal derating curve in Figure 2 of the datasheet.
How is polarity indicated on 1N5273BUR-1?
Polarity on the 1N5273BUR-1 is indicated by a single black cathode band on one end of the DO-213AA glass body. During Zener operation, the banded end must be held at a higher potential than the unmarked anode end. This marking is consistent across all 1N52xxBUR-1 series devices and aligns with JEDEC-standard MELF diode orientation.
Can 1N5273BUR-1 be used in radiation-intensive environments?
Yes, the 1N5273BUR-1 is inherently radiation hard per Microsemi MicroNote 050, making it suitable for low-earth orbit (LEO) satellite power systems and nuclear instrumentation. Its metallurgically bonded glass construction minimizes displacement damage effects, and parametric shifts remain within specification after total ionizing dose exposure up to 100 krad(Si).
1N5273BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 120 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 900 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 91 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
1N5273BUR-1 FAQ
1.How can I place an order for 1N5273BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5273BUR-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 1N5273BUR-1 reliable?
The price and inventory of 1N5273BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5273BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5273BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5273BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5273BUR-1?
1N5273BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5273BUR-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 1N5273BUR-1?
For technical support, including 1N5273BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5273BUR-1 requirements.
6.How does Aetrix verify that 1N5273BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5273BUR-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 1N5273BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5273BUR-1?
All 1N5273BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5273BUR-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 1N5273BUR-1 part is unused and in its original packaging.
Return procedure for 1N5273BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5273BUR-1 Tags
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