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Microchip Technology 1N5952BUR-1/TR
- Part No.:
- 1N5952BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5952BUR-1/TR.pdf
- Description:
- DIODE ZENER 130V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:125
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Product details
Overview
1N5952BUR-1/TR from Microsemi is a 130 V, 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, with 5% voltage tolerance, 2.9 Ω dynamic impedance at 2.9 mA test current, and rated for -65 °C to +175 °C junction temperature. It provides precision voltage regulation in high-density power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5952BUR-1/TR datasheet, 1N5952BUR-1/TR pinout, 1N5952BUR-1/TR application, or 1N5952BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance at low test current, 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 stable 130 V regulation across 11 mA to 11 mA Zener current range (IZM = 11 mA), with specified knee current IZK = 0.25 mA and knee impedance ZZK = 450 Ω. Its metallurgically bonded tungsten slug construction ensures low thermal resistance (RθJEC = 40 °C/W) and enhanced reliability under thermal cycling.
The DO-213AB MELF package enables low parasitic capacitance (typ. 34 pF at 130 V per Figure 2) and ESD immunity per MIL-STD-750 Method 1020. It is screened to MIL-PRF-19500 requirements when ordered with appropriate reliability suffixes and supports RoHS-compliant matte tin plating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 130 V ±5% at IZT = 2.9 mA - defines regulated output voltage in feedback networks |
| Power Dissipation (PD) | 1.5 W @ TEC ≤ 115 °C - sets maximum continuous power handling on end cap |
| Dynamic Impedance (ZZT) | 2.9 Ω at IZT = 2.9 mA - determines regulation stability under load transients |
| Maximum Zener Current (IZM) | 11 mA - limits safe DC operating current to avoid thermal runaway |
| Junction Temperature Range | -65 °C to +175 °C - enables operation in aerospace, downhole, and industrial environments |
| Reverse Leakage (IR) | 1.0 µA @ VR = 100 V - ensures minimal quiescent current in standby protection circuits |
| Forward Voltage (VF) | 1.2 V max @ IF = 200 mA - defines conduction loss if used in forward-biased clamping |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed cylindrical body with metallurgically bonded tungsten slugs; cathode indicated by single band; leadless, symmetric terminals; weight ≈ 0.05 g; dimensions BD = 2.39–2.67 mm, BL = 4.80–5.21 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias; connected to ground or low-side reference in Zener regulation | Provides return path for Zener current; must be routed with low-inductance trace in high-speed protection |
| Cathode | Negative terminal in forward bias; connected to regulated node in reverse-bias Zener operation | Banded end - must be held at higher potential than anode to enable breakdown; polarity-critical for correct regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass encapsulation | Eliminates moisture ingress and long-term parameter drift in humid or corrosive environments |
| Metallurgically enhanced internal contacts | Reduces thermal resistance (RθJEC = 40 °C/W) and improves power cycling endurance |
| MIL-PRF-19500 screening option | Enables use in defense, space, and critical infrastructure where lot traceability and burn-in are mandated |
| Low capacitance (34 pF) | Minimizes signal distortion in RF detector or high-frequency clamp applications |
| ESD robustness (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift or failure |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback network. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier threshold. Use Value: 130 V rating allows direct sensing of auxiliary winding voltage without resistive divider, reducing component count and leakage error. | Use Scenario: Clamping transient surges on 100 V DC bus lines in motor drives or telecom power systems. IC Role / Device Role / Timing Role: Shunt regulator activated above safe threshold to divert excess energy. Use Value: 1.5 W power rating and 11 mA IZM support sustained clamping during repetitive 100–200 ms overvoltage events. |
| High-Reliability Reference Source | Industrial Sensor Excitation |
Use Scenario: Providing stable excitation voltage for strain gauge bridges in downhole drilling instrumentation. IC Role / Device Role / Timing Role: Primary voltage reference in analog front-end with extended temperature range. Use Value: -65 °C to +175 °C operation and hermetic sealing ensure calibration stability across extreme thermal gradients. | Use Scenario: Biasing precision RTD or thermistor measurement circuits in factory automation controllers. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for ratiometric sensor scaling. Use Value: 2.9 Ω ZZT minimizes output impedance variation with current, improving measurement linearity over 0–10 mA load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5952B-TR | Same 130 V/1.5 W spec, but in DO-41 axial package; no MELF geometry or hermetic glass | Lacks low-parasitic performance and high-reliability qualification; unsuitable for SMT or harsh-environment use | Select only for through-hole prototyping or legacy board rework where footprint permits |
| SMBG5952B | Same electrical specs in SMB package; higher RθJA (120 °C/W vs 40 °C/W), non-hermetic epoxy body | Lower thermal performance and reduced long-term stability; not qualified to MIL-PRF-19500 | Choose for cost-sensitive commercial designs where SMT compatibility is required but hermeticity is not critical |
Compared with 1N5952B-TR and SMBG5952B, the 1N5952BUR-1/TR delivers superior thermal management, hermetic reliability, and low-capacitance operation-making it the preferred choice for aerospace, oilfield, and high-precision industrial systems demanding long-term parametric stability.
Availability
1N5952BUR-1/TR is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, high-reliability reference sources, and industrial sensor excitation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N5952BUR-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 1N5952BUR-1/TR belongs to Microsemi's metallurgically bonded glass Zener diode family, engineered for applications demanding hermetic sealing, radiation hardness, and operation across extreme temperature ranges.
FAQ
What is the Zener voltage tolerance for 1N5952BUR-1/TR?
The 1N5952BUR-1/TR has a Zener voltage tolerance of ±5%, meaning its nominal 130 V regulation falls within 123.5 V to 136.5 V at IZT = 2.9 mA and TEC = 30 °C. 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.
Is 1N5952BUR-1/TR RoHS compliant?
Yes, the 1N5952BUR-1/TR is RoHS compliant, as indicated by the "e3" suffix in alternate nomenclature (e.g., 1N5952BUR-1(e3)) and explicitly stated in the FEATURES section of the datasheet. The device uses matte tin plating over copper terminations and meets EU Directive 2011/65/EU requirements without lead, mercury, cadmium, or hexavalent chromium above threshold limits.
What does the "UR-1" in 1N5952BUR-1/TR signify?
The "UR-1" denotes Microsemi's metallurgically bonded glass MELF package (DO-213AB) with commercial reliability level and standard screening. Per the PART NOMENCLATURE table, "UR" identifies the MELF surface-mount variant, while "-1" specifies the base reliability grade; the "TR" suffix added externally indicates tape-and-reel packaging per EIA-481-B standard with 12 mm carrier tape.
Can 1N5952BUR-1/TR replace 1N5952B-TR in existing designs?
No, 1N5952BUR-1/TR cannot directly replace 1N5952B-TR due to fundamental package differences: the former uses DO-213AB (MELF) while the latter uses DO-41 axial. Their footprints, thermal paths, and mounting methods are incompatible. Redesign of PCB layout, solder stencil, and thermal management is required to migrate from through-hole to surface-mount MELF geometry.
What is the maximum steady-state power dissipation for 1N5952BUR-1/TR at 25 °C ambient?
The 1N5952BUR-1/TR has a steady-state power dissipation rating of 1.25 W at TA = 25 °C when mounted on FR4 with 1 oz copper, as specified in the MAXIMUM RATINGS table. This derated value reflects ambient-convection limitations versus the 1.5 W rating achievable at TEC ≤ 115 °C, emphasizing the need for proper end-cap thermal coupling in high-power applications.
1N5952BUR-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):
- 130 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 450 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 98.9 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)
1N5952BUR-1/TR FAQ
1.How can I place an order for 1N5952BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5952BUR-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 1N5952BUR-1/TR reliable?
The price and inventory of 1N5952BUR-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 1N5952BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5952BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5952BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5952BUR-1/TR?
1N5952BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5952BUR-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 1N5952BUR-1/TR?
For technical support, including 1N5952BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5952BUR-1/TR requirements.
6.How does Aetrix verify that 1N5952BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5952BUR-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 1N5952BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5952BUR-1/TR?
All 1N5952BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5952BUR-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 1N5952BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5952BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5952BUR-1/TR Tags
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