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Microchip Technology 1N5927BUR-1/TR
- Part No.:
- 1N5927BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5927BUR-1/TR.pdf
- Description:
- DIODE ZENER 12V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,080
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Product details
Overview
1N5927BUR-1/TR from Microsemi is a 12 V, 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, with 5% voltage tolerance, 31.2 mA test current, 6.5 Ω dynamic impedance at IZT, and rated for -65°C to +175°C junction temperature. It provides precision voltage regulation in high-density power supply feedback loops and reference circuits.
For engineers reviewing the 1N5927BUR-1/TR datasheet, 1N5927BUR-1/TR pinout, 1N5927BUR-1/TR application, or 1N5927BUR-1/TR equivalent, this page delivers verified electrical specs, thermal performance data, MIL-PRF-19500 screening options, RoHS compliance status, and real-world use context for industrial and aerospace-grade designs.
Technical Context
This device operates as a two-terminal voltage regulator in reverse breakdown, with Zener voltage specified at 12 V ±5% under 31.2 mA test current (IZT) at TEC = 30°C. Its metallurgically bonded glass construction ensures hermetic sealing, low thermal resistance (RθJEC = 40°C/W), and ESD immunity per MIL-STD-750 Method 1020.
The 1N5927BUR-1/TR exhibits 6.5 Ω dynamic impedance (ZZT) at IZT and 550 Ω knee impedance (ZZK) at 0.25 mA (IZK), enabling stable regulation across wide current ranges. Capacitance is characterized per Figure 2 in the datasheet and varies with Zener voltage - for 12 V devices, typical C is ~30 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V ±5% at IZT = 31.2 mA - defines nominal regulation point with tight tolerance for stable reference generation |
| Power Dissipation (PD) | 1.5 W @ TEC ≤ 115°C - supports continuous operation in thermally constrained SMT layouts |
| Dynamic Impedance (ZZT) | 6.5 Ω at IZT - ensures minimal output voltage variation under load transients |
| Junction Temperature Range | -65°C to +175°C - enables deployment in extended-temperature industrial, avionics, and downhole systems |
| Thermal Resistance (RθJEC) | 40°C/W - allows efficient heat transfer to end cap, critical for reliability in high-power density designs |
| Reverse Current (IR) | 1.0 µA @ VR = 9.1 V - guarantees low leakage in precision biasing and sensing applications |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical hermetically sealed body with tungsten slugs and tin/lead or RoHS-compliant matte tin plating; cathode indicated by single band; no leads - terminals are axial end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in forward bias; reference ground node in Zener regulation | Connected to system ground or lower-potential rail; must be thermally anchored for RθJEC performance |
| Cathode (banded end) | Current exit terminal in forward bias; regulated output node in Zener mode | Connected to feedback node or voltage reference point; polarity reversal causes catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded internal contacts | Reduces thermal resistance and improves long-term stability under thermal cycling |
| Hermetically sealed voidless glass case | Prevents moisture ingress and parametric drift in humid or corrosive environments |
| MIL-PRF-19500 screening availability | Enables qualification for military, space, and high-reliability programs requiring controlled manufacturing and testing |
| RoHS-compliant (e3) option | Meets EU Directive 2011/65/EU without lead content; compatible with Pb-free reflow profiles |
| ESD immunity per MIL-STD-750 Method 1020 | Eliminates need for external ESD protection in handling and assembly of sensitive control boards |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates error amplifier input in isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference providing stable 12 V threshold for TL431 or similar shunt regulators. Use Value: Maintains ±1% output regulation over line/load/temperature with 6.5 Ω ZZT minimizing ripple coupling. |
Use Scenario: Supplies precise bias voltage to bridge-based pressure or temperature transducers. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing excitation potential for Wheatstone bridges. Use Value: Delivers <1 µA leakage at 9.1 V reverse bias, preventing measurement offset in µV-level sensor outputs. |
| Aerospace Power Monitoring | High-Temperature Motor Control |
Use Scenario: Monitors bus voltage in satellite power distribution units operating beyond 125°C ambient. IC Role / Device Role / Timing Role: Overvoltage clamp and reference element in radiation-hardened monitoring circuitry. Use Value: Operates reliably from -65°C to +175°C with inherent radiation hardness per MicroNote 050. |
Use Scenario: Stabilizes gate drive references in IGBT-based inverters mounted on engine blocks. IC Role / Device Role / Timing Role: Thermal-stable Zener regulating bootstrap capacitor charging voltage. Use Value: Maintains 12 V regulation within ±5% across 150°C case temperature swings due to metallurgical bond integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5927B | Same 12 V, 5% tolerance, DO-213AB package, but non-RoHS (SnPb plating); no TR tape-and-reel suffix | Limited to legacy Pb-containing assembly lines; lacks RoHS compliance documentation | Select when sourcing for existing SnPb-reflow production with no compliance requirements |
| SMBG5927B | Same 12 V, 5% tolerance, but SMB package (larger footprint, higher RθJA = 150°C/W) | Lower power density; less suitable for ultra-compact PCBs; higher thermal derating needed | Choose when board layout constraints favor tabbed SMT packages over MELF geometry |
Compared with 1N5927B and SMBG5927B, the 1N5927BUR-1/TR offers RoHS compliance, tape-and-reel packaging for automated placement, and superior thermal performance via DO-213AB's 40°C/W RθJEC - making it optimal for new high-reliability, high-density designs.
Availability
1N5927BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace telemetry systems, and high-temperature motor controllers requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5927BUR-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 defense, aerospace, and industrial markets.
The 1N5927BUR-1/TR belongs to Microsemi's legacy 1N59xxBUR-1 series of metallurgically bonded MELF Zeners, engineered for applications demanding hermeticity, radiation tolerance, and MIL-PRF-19500 qualification capability.
FAQ
What is the Zener voltage tolerance for 1N5927BUR-1/TR?
The 1N5927BUR-1/TR has a Zener voltage tolerance of ±5%, meaning its measured VZ at 31.2 mA test current falls between 11.4 V and 12.6 V. This tolerance is guaranteed per the "B" suffix in the part nomenclature and applies under standard test conditions (TEC = 30°C). The 1N5927BUR-1/TR is not rated for tighter tolerances like 2% or 1% - those require different variants such as "C" or "D" suffixes.
Does 1N5927BUR-1/TR support MIL-PRF-19500 screening?
Yes, the 1N5927BUR-1/TR is available with MIL-PRF-19500 screening upon request, as confirmed in the T4-LDS-0300-1 datasheet. Screening levels depend on reliability grade suffixes (e.g., MQ, MX) and must be specified at order time. The base 1N5927BUR-1/TR is commercial-grade; full qualification requires explicit ordering with appropriate screening codes and associated documentation.
What is the maximum steady-state power dissipation for 1N5927BUR-1/TR?
The 1N5927BUR-1/TR has a steady-state power dissipation rating of 1.5 W when the end cap temperature (TEC) is maintained at ≤115°C. At 25°C ambient on FR4 with recommended footprint, the derated value is 1.25 W due to higher RθJA (120°C/W). Derating follows the curve in Figure 1 of the datasheet, and exceeding 1.5 W at TEC >115°C risks thermal runaway and permanent failure of the 1N5927BUR-1/TR.
Is 1N5927BUR-1/TR RoHS compliant?
Yes, the "e3" in the full designation 1N5927BUR-1/TR indicates RoHS compliance per EU Directive 2011/65/EU. The device uses matte tin plating instead of tin/lead, and all homogeneous materials meet the maximum concentration values for Cd, Pb, Hg, Cr⁶⁺, PBB, and PBDE. Non-RoHS versions (e.g., 1N5927B) exist but lack the "e3" suffix and are not interchangeable without process validation.
What does the "TR" suffix mean in 1N5927BUR-1/TR?
The "TR" suffix in 1N5927BUR-1/TR denotes tape-and-reel packaging per EIA-481-B standard, using 12 mm carrier tape. This format enables automated pick-and-place assembly. The base part 1N5927BUR-1 is supplied in bulk or ammo pack; adding "TR" confirms reel packaging with standard orientation (cathode band facing up), quantity per reel (typically 3,000 pcs), and humidity-sensitive level (MSL) compliance per J-STD-020.
1N5927BUR-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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 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)
1N5927BUR-1/TR FAQ
1.How can I place an order for 1N5927BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5927BUR-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 1N5927BUR-1/TR reliable?
The price and inventory of 1N5927BUR-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 1N5927BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5927BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5927BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5927BUR-1/TR?
1N5927BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5927BUR-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 1N5927BUR-1/TR?
For technical support, including 1N5927BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5927BUR-1/TR requirements.
6.How does Aetrix verify that 1N5927BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5927BUR-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 1N5927BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5927BUR-1/TR?
All 1N5927BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5927BUR-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 1N5927BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5927BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5927BUR-1/TR Tags
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