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Microchip Technology 1N5915BUR-1/TR
- Part No.:
- 1N5915BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5915BUR-1/TR.pdf
- Description:
- DIODE ZENER 3.9V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,053
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Product details
Overview
1N5915BUR-1/TR from Microsemi is a 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, rated for 3.9 V ±5% Zener voltage at 96.1 mA test current, with 7.5 Ω dynamic impedance and 1.0 mA knee current. It delivers stable voltage regulation in high-density power supply rails and precision reference circuits across industrial temperature range.
For engineers reviewing the 1N5915BUR-1/TR datasheet, 1N5915BUR-1/TR pinout, 1N5915BUR-1/TR application, or 1N5915BUR-1/TR equivalent, this page provides verified electrical parameters, MIL-PRF-19500 screening options, thermal resistance data, hermetic packaging details, and RoHS-compliant alternatives for high-reliability design-in.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 3.9 V reference under regulated current conditions. Its metallurgically bonded tungsten slugs and voidless hermetic glass construction ensure low thermal resistance (RθJEC = 40 °C/W) and radiation hardness per MicroNote 050.
Designed as a surface-mount replacement for axial 1N5915B, it supports operation from –65 °C to +175 °C junction temperature, exhibits ≤1.2 V forward voltage at 200 mA, and maintains <5 µA reverse leakage at 1.0 V - enabling use in low-power sensing and ESD-robust interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V ±5% at IZT = 96.1 mA - defines precise regulation point for feedback loops and reference generation. |
| Power Dissipation | 1.5 W @ TEC ≤ 115 °C - enables sustained operation in compact thermal environments with proper end-cap heatsinking. |
| Dynamic Impedance (ZZT) | 7.5 Ω - ensures minimal output voltage variation under load transients in voltage reference applications. |
| Knee Current (IZK) | 1.0 mA - specifies lowest usable regulation current before significant voltage droop occurs. |
| Reverse Leakage (IR) | 25 µA @ VR = 1.0 V - guarantees low standby current in battery-backed or ultra-low-power circuits. |
| Junction Temperature Range | –65 °C to +175 °C - supports deployment in aerospace, downhole, and military-grade systems. |
| Thermal Resistance (RθJEC) | 40 °C/W - allows direct thermal coupling to PCB copper or metal chassis for effective power handling. |
Pinout & Package
DO-213AB (MELF) glass package: hermetically sealed cylindrical body with metallurgically bonded tungsten slugs; cathode indicated by single black band; RoHS-compliant matte tin plating over copper; weight ≈ 0.05 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; required for reverse-bias Zener operation. |
| Cathode | Zener regulation output / reverse-bias input | Banded end; connected to regulated voltage rail; must be held positive relative to anode during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift - critical for 20+ year field reliability in sealed enclosures. |
| Metallurgically enhanced internal contacts | Reduces interfacial thermal resistance by >30% vs standard wire-bonded Zeners - improves power cycling endurance. |
| MIL-PRF-19500 screening option | Enables qualification for defense/aerospace programs requiring lot traceability, burn-in, and parametric retest. |
| Non-ESD-sensitive design | Withstands >4 kV HBM per MIL-STD-750 Method 1020 - simplifies handling and eliminates ESD protection overhead in assembly. |
| Specified capacitance profile | Capacitance ≤150 pF across 3.3–200 V range (per Figure 2) - supports RF bypass and noise-sensitive analog reference use. |
Applications
| Industrial Power Supply Regulation | Aerospace Reference Voltage Generation |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision shunt reference providing 3.9 V setpoint for TL431 or optocoupler biasing. Use Value: Low 7.5 Ω ZZT minimizes loop gain variation across line/load changes; hermetic seal prevents humidity-induced drift in avionics bays. |
Use Scenario: Generating stable bias for radiation-tolerant op-amps in satellite payload telemetry conditioning. IC Role / Device Role / Timing Role: Primary voltage reference in analog front-end signal chains operating beyond LEO. Use Value: Inherent radiation hardness (MicroNote 050) and –65 °C to +175 °C operation enable unshielded use in deep-space instruments. |
| Downhole Sensor Signal Conditioning | Medical Equipment Overvoltage Protection |
Use Scenario: Providing regulated excitation voltage for piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: High-temperature shunt regulator maintaining sensor bridge bias under 150 °C ambient. Use Value: RθJEC = 40 °C/W allows direct mounting to stainless steel housing - avoids external heatsinks in space-constrained tool strings. |
Use Scenario: Clamping transient surges on patient-connected ECG electrode inputs during defibrillation events. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting common-mode voltage to <5 V during 5 kV pulses. Use Value: Low 1.0 mA IZK ensures clamping activation at microamp-level leakage - critical for patient safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5915B | Axial DO-41 package; identical electrical specs but higher RθJA (150 °C/W vs 120 °C/W); no tape-and-reel option. | Suitable for prototyping or through-hole boards; not compatible with SMT reflow or high-density layouts. | Select 1N5915B only when manual assembly or legacy board compatibility is required. |
| SMBG5915B | SMB package; same VZ, IZT, ZZT; higher RθJA (140 °C/W); 1.0 W power rating (vs 1.5 W). | Acceptable for lower-power applications where footprint size is constrained but thermal margin is reduced. | Choose SMBG5915B only if PCB area is prioritized over power derating headroom and thermal performance. |
Compared with 1N5915BUR-1/TR, the 1N5915B offers identical regulation performance but lacks SMT manufacturability and thermal efficiency, while SMBG5915B trades 33% lower power capability and higher thermal resistance for smaller footprint - making 1N5915BUR-1/TR optimal for high-reliability, high-power-density designs.
Availability
1N5915BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace telemetry systems, downhole instrumentation, and medical safety-critical circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N5915BUR-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, mixed-signal, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N5915BUR-1/TR belongs to Microsemi's metallurgically bonded MELF Zener series, engineered specifically for mission-critical voltage regulation where hermeticity, thermal stability, and MIL-spec screening are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N5915BUR-1/TR?
The 1N5915BUR-1/TR has a nominal Zener voltage of 3.9 V with ±5% tolerance, measured at a test current (IZT) of 96.1 mA and end-cap temperature (TEC) maintained at 30 °C. Voltage is recorded 90 seconds after dc current application to ensure thermal stabilization. This tolerance and test method are defined in Microsemi's T4-LDS-0300-1 specification.
Does 1N5915BUR-1/TR support MIL-PRF-19500 screening?
Yes, 1N5915BUR-1/TR supports optional MIL-PRF-19500 screening per Microsemi's documentation, including lot traceability, extended burn-in, and parametric retesting. Screening requires specific ordering codes and is subject to factory coordination - the base 1N5915BUR-1/TR part number is screened to commercial standards unless explicitly ordered with screening suffixes.
What is the maximum reverse leakage current for 1N5915BUR-1/TR at 1.0 V?
The maximum reverse leakage current (IR) for 1N5915BUR-1/TR is 25 µA when biased at 1.0 V reverse voltage, as specified in the Electrical Characteristics table on page 3 of the T4-LDS-0300-1 datasheet. This value is guaranteed across the full operating temperature range and confirms suitability for ultra-low-power standby circuits.
How does the thermal resistance of 1N5915BUR-1/TR compare between junction-to-end-cap and junction-to-ambient?
The 1N5915BUR-1/TR has RθJEC = 40 °C/W (junction-to-end-cap) and RθJA = 120 °C/W (junction-to-ambient on FR4 with 1 oz Cu). The 3× difference highlights the importance of thermal coupling to a heatsink or metal chassis - using the end cap as a thermal path increases power handling by up to 2.5× versus relying solely on PCB convection.
Is 1N5915BUR-1/TR RoHS compliant, and what plating is used?
Yes, 1N5915BUR-1/TR is RoHS compliant (designated by "e3" in nomenclature), featuring matte tin plating over copper terminals. The plating meets MIL-STD-750 Method 2026 for solderability and withstands 260 °C for 10 seconds during reflow. Non-RoHS versions (blank suffix) use tin/lead plating and are also available upon request.
1N5915BUR-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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 7.5 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 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)
1N5915BUR-1/TR FAQ
1.How can I place an order for 1N5915BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5915BUR-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 1N5915BUR-1/TR reliable?
The price and inventory of 1N5915BUR-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 1N5915BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5915BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5915BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5915BUR-1/TR?
1N5915BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5915BUR-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 1N5915BUR-1/TR?
For technical support, including 1N5915BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5915BUR-1/TR requirements.
6.How does Aetrix verify that 1N5915BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5915BUR-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 1N5915BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5915BUR-1/TR?
All 1N5915BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5915BUR-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 1N5915BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5915BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5915BUR-1/TR Tags
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