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Microchip Technology 1N5914BUR-1/TR
- Part No.:
- 1N5914BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5914BUR-1/TR.pdf
- Description:
- DIODE ZENER 3.6V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,019
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Product details
Overview
1N5914BUR-1 from Microsemi is a 3.6 V, 5% tolerance, 1.5 W surface-mount Zener diode in DO-213AB (MELF) glass package, designed for precision voltage regulation in high-density PCBs with low parasitic requirements and extended temperature operation from –65 °C to +175 °C.
For engineers reviewing the 1N5914BUR-1 datasheet, 1N5914BUR-1 pinout, 1N5914BUR-1 application, or 1N5914BUR-1 equivalent, key selection criteria include Zener voltage stability over 10–104 mA test current, 9 Ω dynamic impedance at IZT, hermetic glass sealing, MIL-PRF-19500 screening capability, and RoHS-compliant matte tin plating.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased breakdown mode, with specified Zener voltage (VZ = 3.6 V ±5%) measured at IZT = 104.2 mA and thermal end-cap temperature TEC = 30 °C. Its metallurgically bonded tungsten slug construction ensures low thermal resistance (RθJEC = 40 °C/W) and enhanced reliability under thermal cycling.
The 1N5914BUR-1 exhibits 500 Ω knee impedance (ZZK) at IZK = 1.0 mA and maintains IR ≤ 100 µA at VR = 1.0 V, supporting stable regulation across wide current ranges. Its hermetically sealed voidless glass case provides immunity to moisture ingress and ESD insensitivity per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V ±5% at IZT = 104.2 mA - defines nominal regulation point with tight tolerance for stable reference design |
| Power Dissipation (PD) | 1.5 W @ TEC ≤ 115 °C - supports continuous regulation in thermally constrained SMT layouts |
| Dynamic Impedance (ZZT) | 9.0 Ω at IZT - ensures minimal output voltage variation under load current changes |
| Reverse Current (IR) | ≤100 µA at VR = 1.0 V - guarantees low leakage in standby or low-power bias networks |
| Junction Temp Range | –65 °C to +175 °C - enables operation in aerospace, downhole, and industrial control environments |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - allows use as clamping diode in bidirectional protection circuits |
| Capacitance | Specified in Figure 2 (typ. ~100 pF at 1 MHz) - critical for RF bypass and noise-sensitive analog references |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical hermetically sealed body with cathode band marking; terminals are metallurgically bonded tungsten slugs plated with RoHS-compliant matte tin; weight ≈ 0.05 g; solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to circuit ground or lower potential node during Zener regulation |
| Cathode | Banded end | Connected to regulated voltage rail; polarity must be observed to avoid forward conduction |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded MELF construction | Reduces thermal resistance by >30% vs standard glass diodes, improving power handling and long-term stability |
| Hermetic voidless glass seal | Prevents moisture-induced parameter drift and corrosion in humid or harsh environmental deployments |
| MIL-PRF-19500 screening option | Enables qualification for military/aerospace programs requiring controlled manufacturing and lot traceability |
| Low ESD sensitivity | Immune to damage from human-body-model discharges up to 2 kV (per MIL-STD-750 Method 1020) |
| RoHS-compliant matte tin plating | Ensures reliable solder wetting and intermetallic formation without lead-based processes |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Monitor |
|---|---|
Use Scenario: Precision feedback path in isolated DC/DC converters for factory automation controllers. IC Role / Device Role / Timing Role: Zener diode providing stable 3.6 V reference for optocoupler biasing and error amplifier input. Use Value: Tight 5% VZ tolerance and 9 Ω ZZT minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Overvoltage detection node in satellite power management units operating at –55 °C to +125 °C. IC Role / Device Role / Timing Role: Reverse-biased voltage clamp triggering fault logic when bus exceeds 3.6 V threshold. Use Value: Guaranteed operation to +175 °C junction and hermetic packaging prevent parameter shift in vacuum/thermal-cycling conditions. |
| Downhole Sensor Biasing | Medical Imaging HV Protection |
Use Scenario: Biasing circuit for piezoresistive pressure transducers in oil/gas well logging tools. IC Role / Device Role / Timing Role: Low-leakage (IR ≤ 100 µA) Zener establishing stable excitation voltage for bridge sensors. Use Value: Sub-100 µA reverse current ensures minimal sensor offset error and preserves battery life in remote deployments. |
Use Scenario: Transient suppression on analog front-end inputs of MRI gradient coil monitoring systems. IC Role / Device Role / Timing Role: Fast-response Zener clamping ESD events and switching spikes on 3.3 V signal lines. Use Value: Low capacitance (~100 pF) avoids signal integrity degradation while maintaining <1.2 V forward conduction for bidirectional protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5914B | Axial-leaded DO-41 package; identical electrical specs but higher parasitic inductance/capacitance | Suitable for prototyping or through-hole boards; not viable for high-frequency or ultra-dense SMT designs | Select 1N5914B only when manual assembly, rework access, or legacy footprint compatibility is required |
| SMBG5914B | SMB package; same VZ/tolerance but RθJA = 100 °C/W (vs 120 °C/W for 1N5914BUR-1); higher IZM = 416 mA | Better thermal performance on FR4; preferred for higher ambient temperature or forced-air-cooled systems | Choose SMBG5914B when board space permits larger footprint and thermal derating margin is critical |
Compared with 1N5914B and SMBG5914B, the 1N5914BUR-1 uniquely balances MELF's low parasitics and hermetic reliability with industry-standard Zener regulation specs-making it optimal for high-reliability SMT applications where layout density and environmental robustness are co-constrained.
Availability
1N5914BUR-1 is available at Aetrix Electronics and suitable for industrial power supplies, aerospace monitoring systems, downhole instrumentation, and medical imaging equipment requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N5914BUR-1 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 1N5914BUR-1 belongs to Microsemi's metallurgically bonded MELF Zener series, engineered specifically for applications demanding hermetic sealing, extended temperature operation, and MIL-PRF-19500 qualification readiness.
FAQ
What is the Zener voltage tolerance and test condition for the 1N5914BUR-1?
The 1N5914BUR-1 has a Zener voltage tolerance of ±5%, specified at VZ = 3.6 V measured with IZT = 104.2 mA and end-cap temperature TEC = 30 °C. This tolerance ensures predictable regulation behavior in feedback loops and reference circuits where accuracy directly impacts system performance.
Does the 1N5914BUR-1 support MIL-PRF-19500 screening?
Yes, the 1N5914BUR-1 supports optional screening per MIL-PRF-19500 when ordered with appropriate reliability level suffixes (e.g., MQ, MX). This screening includes rigorous environmental stress testing, lot traceability, and process controls required for military and aerospace deployments.
What is the maximum reverse leakage current for the 1N5914BUR-1 at 1.0 V?
The 1N5914BUR-1 exhibits a maximum reverse current (IR) of 100 µA when biased at VR = 1.0 V. This low leakage supports accurate biasing in high-impedance sensor interfaces and minimizes quiescent power loss in battery-powered systems.
Can the 1N5914BUR-1 be used in high-temperature environments?
Yes, the 1N5914BUR-1 is rated for junction and storage temperatures from –65 °C to +175 °C. Its metallurgically bonded construction and hermetic glass package maintain parameter stability in downhole, engine-control, and avionics applications where thermal extremes are routine.
Is the 1N5914BUR-1 RoHS compliant?
Yes, the 1N5914BUR-1 is RoHS compliant, featuring matte tin plating over copper terminations. The "e3" suffix in alternate nomenclature (e.g., 1N5914BUR-1(e3)) explicitly denotes RoHS compliance per Directive 2011/65/EU.
1N5914BUR-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 75 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)
1N5914BUR-1/TR FAQ
1.How can I place an order for 1N5914BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5914BUR-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 1N5914BUR-1/TR reliable?
The price and inventory of 1N5914BUR-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 1N5914BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5914BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5914BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5914BUR-1/TR?
1N5914BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5914BUR-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 1N5914BUR-1/TR?
For technical support, including 1N5914BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5914BUR-1/TR requirements.
6.How does Aetrix verify that 1N5914BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5914BUR-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 1N5914BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5914BUR-1/TR?
All 1N5914BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5914BUR-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 1N5914BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5914BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5914BUR-1/TR Tags
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