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Microchip Technology 1N5933BUR-1/TR
- Part No.:
- 1N5933BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5933BUR-1/TR.pdf
- Description:
- DIODE ZENER 22V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,671
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Product details
Overview
1N5933BUR-1/TR from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 22 V ±5% Zener voltage at 17.0 mA test current, with 17.5 Ω dynamic impedance and 1.2 V forward voltage at 200 mA. It delivers stable voltage regulation in high-density power supply rails and precision reference circuits across industrial temperature range.
For engineers reviewing the 1N5933BUR-1/TR datasheet, 1N5933BUR-1/TR pinout, 1N5933BUR-1/TR application, or 1N5933BUR-1/TR equivalent, key selection criteria include Zener tolerance (±5%), low thermal resistance (40 °C/W junction-to-end cap), hermetic glass construction, MIL-PRF-19500 screening availability, and RoHS-compliant matte tin plating.
Technical Context
This device operates as a two-terminal voltage regulator in reverse-biased breakdown mode, with specified knee current (IZK = 0.25 mA) and regulated impedance (ZZK = 650 Ω) near breakdown onset. Its metallurgically bonded tungsten slug structure ensures low thermal resistance and enhanced reliability under thermal cycling.
The DO-213AB MELF package enables high-density SMT placement while maintaining hermeticity and ESD immunity per MIL-STD-750 Method 1020. Capacitance is characterized per Figure 2 (≈15 pF at 22 V), supporting noise-sensitive analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22 V ±5% at IZT = 17.0 mA - defines nominal regulation point with tight tolerance for precision references |
| Power Dissipation (PD) | 1.5 W @ TEC ≤ 115 °C - supports continuous operation in thermally constrained PCB layouts |
| Dynamic Impedance (ZZT) | 17.5 Ω at IZT - determines output voltage stability under load current variation |
| Junction Temp Range | –65 to +175 °C - enables use in extended-temperature industrial and aerospace environments |
| Thermal Resistance (RθJEC) | 40 °C/W - allows efficient heat transfer to end cap, critical for sustained 1.5 W operation |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - confirms low-loss conduction in forward bias for protection/clamping roles |
| Reverse Current (IR) | 1.0 µA @ VR = 16.7 V - ensures minimal leakage below regulation threshold |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed voidless hard glass body with tungsten slugs; cathode indicated by single band; lead-free matte tin plating over copper; weight ≈ 0.05 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; negative terminal during Zener regulation | Connected to lower-potential node in shunt regulator configuration |
| Cathode | Negative terminal in forward bias; positive terminal during Zener regulation | Banded end - must be held at higher potential than anode to enable breakdown regulation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded internal contacts | Reduces thermal resistance and improves long-term reliability under power cycling |
| Hermetically sealed glass construction | Prevents moisture ingress and parameter drift in harsh environments |
| MIL-PRF-19500 screening option | Enables qualification for high-reliability defense and space applications |
| RoHS-compliant matte tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compliance with environmental directives |
| Non-ESD-sensitive design | Withstands handling without special precautions per MIL-STD-750 Method 1020 |
Applications
| Industrial Power Supply Regulation | Automotive ECUs |
|---|---|
Use Scenario: Stabilizing 24 V rail-derived 22 V reference for sensor excitation and ADC biasing in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage regulator providing low-drift, low-noise DC reference independent of input ripple. Use Value: 17.5 Ω ZZT and 1.0 µA IR at 16.7 V ensure <10 mV regulation error across 5–25 mA load current. | Use Scenario: Overvoltage clamping on LIN bus transceiver supply lines exposed to load dump transients. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in Zener mode to clamp spikes above 22 V. Use Value: Hermetic glass package withstands automotive thermal cycling; 1.5 W rating handles short-duration surges without degradation. |
| Aerospace Avionics Reference | Test & Measurement Equipment |
Use Scenario: Precision 22 V reference in flight control system analog signal conditioning with MIL-PRF-19500 screening. IC Role / Device Role / Timing Role: Primary voltage reference for DAC output scaling and calibration circuitry. Use Value: ±5% VZ tolerance and –65 to +175 °C operation meet DO-160E environmental requirements. | Use Scenario: Low-capacitance (≈15 pF) Zener reference in high-frequency oscilloscope front-end attenuators. IC Role / Device Role / Timing Role: Stable DC bias source minimizing parasitic loading on 100 MHz+ signal paths. Use Value: DO-213AB MELF geometry and specified capacitance reduce signal distortion vs. tabbed SMT packages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5933B | Same electrical specs but in DO-41 axial-leaded package; no tape-and-reel (TR) option | Requires through-hole assembly; unsuitable for high-density SMT designs | Select when manual prototyping or legacy board rework is needed without SMT infrastructure |
| SMBG5933B | Same VZ/IZT/ZZT but in SMB package; RθJA = 100 °C/W (vs. 120 °C/W for 1N5933BUR-1/TR) | Higher power density but larger footprint; less hermetic than glass MELF | Select when board space permits larger tabbed package and MIL-PRF-19500 screening is not required |
Compared with 1N5933B and SMBG5933B, the 1N5933BUR-1/TR uniquely combines SMT compatibility, hermetic reliability, MIL-PRF-19500 screening readiness, and tape-and-reel delivery-making it optimal for automated high-reliability production where thermal and environmental robustness are critical.
Availability
1N5933BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, aerospace avionics, and test equipment requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for 1N5933BUR-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 1N59xxBUR-1 series belongs to Microsemi's precision Zener diode product line, engineered for applications demanding hermetic sealing, radiation hardness, and MIL-PRF-19500 qualification capability in compact MELF packaging.
FAQ
What is the Zener voltage tolerance for 1N5933BUR-1/TR?
The 1N5933BUR-1/TR has a Zener voltage tolerance of ±5%, specified as 22 V at 17.0 mA test current (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of Microsemi's T4-LDS-0300-1 datasheet and applies to all units shipped with the "B" suffix in the nomenclature. The 1N5933BUR-1/TR maintains this tolerance across its full operating temperature range.
Is 1N5933BUR-1/TR RoHS compliant?
Yes, the 1N5933BUR-1/TR is RoHS compliant, indicated by the "e3" suffix in its full nomenclature (1N5933BUR-1/TR e3). It features matte tin plating over copper terminals and meets JEDEC J-STD-609A Class 3 requirements. The RoHS compliance is explicitly stated in the Features section and Part Nomenclature table of the official Microsemi datasheet.
What does the "TR" suffix mean in 1N5933BUR-1/TR?
"TR" denotes tape-and-reel packaging per EIA-481-B standard using 12 mm carrier tape, enabling automated SMT placement. This is confirmed in the Mechanical and Packaging section of the datasheet, which states: "TAPE & REEL option: Standard per EIA-481-B with 12mm tape (add TR suffix to part number)." The 1N5933BUR-1/TR is supplied in this format and requires no additional conversion for pick-and-place systems.
Can 1N5933BUR-1/TR replace axial 1N5933B in existing designs?
No direct replacement: the 1N5933BUR-1/TR uses DO-213AB (MELF) packaging, while 1N5933B uses DO-41 axial leads. Their footprints, thermal paths, and assembly processes differ fundamentally. Though electrical parameters match, PCB layout and reflow profile must be redesigned. The 1N5933BUR-1/TR is not a drop-in substitute for 1N5933B without hardware revision.
What is the maximum reverse current (IR) specification for 1N5933BUR-1/TR?
The maximum reverse current (IR) for 1N5933BUR-1/TR is 1.0 µA at VR = 16.7 V, as specified in the Electrical Characteristics table on page 3 of the datasheet. This value reflects leakage below the Zener knee and is measured at TEC = 25 °C. It ensures minimal power loss and stable regulation in low-current reference applications using the 1N5933BUR-1/TR.
1N5933BUR-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):
- 22 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 17.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 16.7 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)
1N5933BUR-1/TR FAQ
1.How can I place an order for 1N5933BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5933BUR-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 1N5933BUR-1/TR reliable?
The price and inventory of 1N5933BUR-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 1N5933BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5933BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5933BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5933BUR-1/TR?
1N5933BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5933BUR-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 1N5933BUR-1/TR?
For technical support, including 1N5933BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5933BUR-1/TR requirements.
6.How does Aetrix verify that 1N5933BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5933BUR-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 1N5933BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5933BUR-1/TR?
All 1N5933BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5933BUR-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 1N5933BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5933BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5933BUR-1/TR Tags
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