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Microchip Technology 1N5922BUR-1/TR
- Part No.:
- 1N5922BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5922BUR-1/TR.pdf
- Description:
- DIODE ZENER 7.5V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,261
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Product details
Overview
1N5922BUR-1/TR from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 7.5 V ±5% Zener voltage at 50 mA test current, with 3.0 Ω dynamic impedance, 200 mA maximum Zener current, and -65 °C to +175 °C operating junction temperature - used for precision voltage regulation in high-density power supply feedback loops.
For engineers reviewing the 1N5922BUR-1/TR datasheet, 1N5922BUR-1/TR pinout, 1N5922BUR-1/TR application, or 1N5922BUR-1/TR equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (40 °C/W junction-to-end cap), hermetic glass construction, MIL-PRF-19500 screening eligibility, and RoHS-compliant matte tin plating.
Technical Context
This device operates as a reverse-biased voltage reference with specified knee current (IZK = 0.5 mA) and low dynamic impedance (ZZK = 3.0 Ω), enabling stable regulation across wide current ranges (1.0–200 mA). Its metallurgically bonded tungsten slugs and voidless glass seal deliver low thermal resistance and ESD immunity per MIL-STD-750 Method 1020.
The DO-213AB MELF package supports automated SMT placement while maintaining hermeticity and radiation hardness per MicroNote 050. Capacitance is characterized per Figure 2 (typ. ~500 pF at 7.5 V), and forward voltage is ≤1.2 V at 200 mA - critical for bidirectional clamping verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V ±5% at IZT = 50 mA - defines nominal regulation point with tight tolerance for feedback accuracy |
| Dynamic Impedance (ZZT) | 3.0 Ω at IZT = 50 mA - ensures minimal output voltage shift under load transients |
| Max Zener Current (IZM) | 200 mA - sets absolute DC current limit before thermal runaway at TEC ≤ 115 °C |
| Junction-to-End Cap RθJEC | 40 °C/W - enables direct thermal coupling to PCB copper for reliable 1.5 W dissipation |
| Reverse Leakage (IR) | 5.0 µA max at VR = 5.0 V - guarantees low standby power loss in sensing circuits |
| Operating Temperature | -65 °C to +175 °C - supports deployment in aerospace, downhole, and military environments |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - validates robust anode-cathode conduction for bidirectional protection use |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed cylindrical body with metallurgically bonded tungsten end caps; cathode indicated by single black band; leadless, symmetric terminals; weight ≈ 0.05 g; solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; reference node in Zener mode | Connected to lower-potential rail; must be routed with thermal relief for 1.5 W dissipation |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in Zener mode | Banded end held positive relative to anode during regulation; requires stable ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically enhanced internal contacts | Reduces interfacial thermal resistance by >30% vs standard wire-bonded Zeners, improving power handling |
| MIL-PRF-19500 screening option | Enables qualification for defense/aerospace programs requiring lot traceability and extended reliability testing |
| RoHS-compliant matte tin plating | Ensures compatibility with lead-free reflow profiles (260 °C/10 s) without whisker risk |
| ESD immunity (MIL-STD-750 Method 1020) | Withstands ≥4 kV HBM without parameter shift - suitable for unshielded industrial sensor interfaces |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulates error amplifier reference in isolated flyback converter feedback network. IC Role / Device Role / Timing Role: Precision voltage reference establishing 7.5 V setpoint for optocoupler-driven control loop. Use Value: Tight 5% VZ tolerance and low ZZT maintain ±1% output regulation across line/load variations. |
Use Scenario: Provides stable excitation voltage for RTD or bridge-based pressure transducers. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference supplying constant current to sensing elements. Use Value: Hermetic glass package prevents humidity-induced drift; 175 °C rating supports engine bay deployments. |
| Aerospace Avionics Voltage Clamp | Downhole Oil & Gas Instrumentation |
Use Scenario: Protects ADC inputs from transients on 28 V aircraft bus interfaces. IC Role / Device Role / Timing Role: Bidirectional transient suppressor leveraging low VF and controlled VZ clamping threshold. Use Value: Radiation hardness (MicroNote 050) and MIL-PRF-19500 screening ensure mission-critical reliability. |
Use Scenario: Stabilizes bias voltage for piezoelectric sensors in high-temperature wellhead controllers. IC Role / Device Role / Timing Role: High-temperature Zener reference maintaining accuracy at 150 °C ambient. Use Value: -65 °C to +175 °C operating range and voidless glass seal withstand thermal cycling and H2S exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5922B | Same electrical specs but axial DO-41 package; no TR tape/reel; non-RoHS default | Requires through-hole assembly; unsuitable for high-density SMT layouts | Select when legacy board repair or manual prototyping demands axial form factor |
| SMBG5922B | Same VZ/IZM but SMB package; higher RθJA (150 °C/W); RoHS compliant | Lower power density; less effective thermal coupling than MELF's end-cap interface | Choose for cost-sensitive consumer designs where 1.25 W derated power suffices |
Compared with 1N5922BUR-1/TR, the 1N5922B lacks SMT compatibility and RoHS compliance, while SMBG5922B trades thermal performance for lower assembly cost - making 1N5922BUR-1/TR optimal for high-reliability, high-power-density applications demanding hermeticity and MIL screening.
Availability
1N5922BUR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor signal conditioning, aerospace avionics voltage clamping, and downhole oil & gas instrumentation requiring stable component supply across extended temperature and reliability requirements.
Supply support for 1N5922BUR-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 analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N5922BUR-1/TR belongs to Microsemi's metallurgically bonded MELF Zener series, engineered for applications demanding hermetic sealing, radiation tolerance, and MIL-PRF-19500 qualified reliability in extreme environments.
FAQ
What is the Zener voltage tolerance for 1N5922BUR-1/TR?
The 1N5922BUR-1/TR has a Zener voltage tolerance of ±5% at 50 mA test current, corresponding to a nominal 7.5 V regulation point. This tolerance is confirmed in the Electrical Characteristics table on Page 3 of the T4-LDS-0300-1 datasheet and applies to all units shipped with the 'B' suffix in the nomenclature. The 1N5922BUR-1/TR maintains this specification across its full operating temperature range.
Is 1N5922BUR-1/TR RoHS compliant?
Yes, the 'e3' suffix in the full part number 1N5922BUR-1/TR indicates RoHS compliance per EU Directive 2011/65/EU. The device uses matte tin plating over copper terminations and meets JEDEC J-STD-609A Class 3 requirements. This is explicitly stated in the Part Nomenclature section (Page 2) and confirmed in the Mechanical and Packaging description.
What is the maximum power dissipation for 1N5922BUR-1/TR at 25 °C ambient?
The 1N5922BUR-1/TR is rated for 1.25 W steady-state power dissipation at TA = 25 °C when mounted on FR4 with 1 oz copper and the recommended footprint. Its absolute maximum is 1.5 W when end-cap temperature (TEC) is maintained at ≤115 °C - a condition enabled by the 40 °C/W junction-to-end-cap thermal resistance. Both values are listed in the Maximum Ratings table (Page 1).
Does 1N5922BUR-1/TR support MIL-PRF-19500 screening?
Yes, the 1N5922BUR-1/TR is eligible for screening per MIL-PRF-19500, as noted in the Features section (Page 1) and referenced in the Part Nomenclature reliability level codes. Screening requires explicit ordering with appropriate MQ/MX/MV/MSP prefix and must be coordinated with Microsemi (now Microchip) for lot-level documentation and test reports.
What is the cathode marking convention for 1N5922BUR-1/TR?
The cathode of the 1N5922BUR-1/TR is marked by a single black band on the glass body, consistent with JEDEC DO-213AB standards. The device must be operated with the banded end positive relative to the unbanded (anode) end during Zener regulation. This polarity and marking method are specified in the Mechanical and Packaging section (Page 2) of the datasheet.
1N5922BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N5922BUR-1/TR FAQ
1.How can I place an order for 1N5922BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5922BUR-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 1N5922BUR-1/TR reliable?
The price and inventory of 1N5922BUR-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 1N5922BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5922BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5922BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5922BUR-1/TR?
1N5922BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5922BUR-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 1N5922BUR-1/TR?
For technical support, including 1N5922BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5922BUR-1/TR requirements.
6.How does Aetrix verify that 1N5922BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5922BUR-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 1N5922BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5922BUR-1/TR?
All 1N5922BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5922BUR-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 1N5922BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5922BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5922BUR-1/TR Tags
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