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Microchip Technology 1N3017BUR-1
- Part No.:
- 1N3017BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF
- Datasheet:
-
1N3017BUR-1.pdf
- Description:
- DIODE ZENER 7.5V 1W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,333
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Product details
Overview
1N3017BUR-1 from Microsemi is a surface-mount glass-hermetic Zener diode in DO-213AB (MELF) package, rated for 1.5 W power dissipation at 25°C, with nominal Zener voltage 7.5 V ±5%, Zener test current 34 mA, and maximum Zener impedance 4.0 Ω at IZT - used for precision voltage regulation in high-reliability power supply feedback and reference circuits.
For engineers reviewing the 1N3017BUR-1 datasheet, 1N3017BUR-1 pinout, 1N3017BUR-1 application, or 1N3017BUR-1 equivalent, key selection factors include its 7.5 V regulation tolerance, low 0.5 μA reverse leakage at VR = 5.7 V, hermetic glass MELF construction, -65°C to +175°C operating temperature range, and compatibility with RoHS-compliant reflow soldering per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its metallurgically enhanced contact design reduces thermal resistance and improves long-term stability under thermal cycling.
The DO-213AB package enables high-density placement while maintaining low parasitic capacitance (typical 5 pF at VR = 0 V, per Figure 2) and inherent radiation hardness per Microsemi MicroNote 050 - critical for aerospace and defense applications requiring MIL-PRF-19500/115 screening options (e.g., MX1N3017BUR-1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V ±5% - provides stable reference point for feedback loops in regulated DC-DC converters |
| Zener Test Current | 34 mA - establishes 0.25 W baseline power at regulation point for consistent VZ measurement |
| Max Zener Impedance | 4.0 Ω at IZT - ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage Current | 0.5 μA at VR = 5.7 V - guarantees low quiescent power loss in standby mode |
| Power Dissipation | 1.5 W at 25°C end-cap temperature - supports higher continuous regulation than standard 1 W Zeners |
| Operating Temperature | -65°C to +175°C - enables deployment in extended-environment industrial and avionics systems |
| Thermal Resistance | 40°C/W junction-to-end-cap - allows accurate thermal modeling when mounted on heatsinked substrates |
Pinout & Package
DO-213AB (MELF) glass hermetic package: cylindrical body with cathode band marking; terminals are unmarked anode and banded cathode; no leads - soldered directly to PCB pads per recommended footprint (Page 3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal during Zener operation | Must be held at higher potential than anode to enable breakdown regulation; polarity critical for correct circuit function |
| Anode (unbanded end) | Forward-biased terminal during Zener operation | Serves as reference ground node in shunt regulator topologies; connects to system common or feedback divider low-side |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation - extends lifetime beyond plastic-packaged alternatives in humid or high-vibration environments |
| Metallurgically enhanced contact | Reduces thermal resistance by ~25% vs. standard DO-13 equivalents - improves power handling and long-term VZ drift performance |
| Nonsensitive to ESD | No special handling required per MIL-STD-750 - simplifies manufacturing and field repair logistics |
| RoHS-compliant plating | Tin-lead or annealed matte-tin termination - supports lead-free reflow (260°C/10 s) without solder joint reliability compromise |
| Radiation-hardened structure | Inherent TID tolerance per MicroNote 050 - qualified for low-dose-rate space applications without additional shielding |
Applications
| Switch-Mode Power Supply Feedback | Aerospace Voltage Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 7.5 V threshold to TL431-like control ICs or discrete error amplifiers. Use Value: Tight ±5% VZ tolerance and low 4.0 Ω Zener impedance minimize output voltage drift across line/load/temperature variations. |
Use Scenario: Providing stable bias voltage for radiation-tolerant op-amps in satellite telemetry conditioning circuits. IC Role / Device Role / Timing Role: Primary voltage reference element in analog signal chains where long-term stability and single-event latchup immunity are mandatory. Use Value: Hermetic glass seal and inherent radiation hardness eliminate need for external shielding or derating - reducing BOM count and board area. |
| Industrial Sensor Excitation | Military Grade Power Monitor |
Use Scenario: Supplying excitation voltage to precision RTD or strain gauge bridges in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing IC-based references where supply headroom is limited. Use Value: 0.5 μA reverse leakage at 5.7 V ensures negligible bridge current error; -65°C to +175°C rating supports operation inside sealed enclosures near motors. |
Use Scenario: Monitoring rail integrity in MIL-STD-704 compliant power distribution units for tactical vehicles. IC Role / Device Role / Timing Role: Overvoltage clamp protecting downstream FPGAs and ADCs during transient surges. Use Value: 1.5 W power rating and 40°C/W junction-to-end-cap thermal resistance enable sustained clamping without thermal runaway under repeated 100 ms transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3017B (DO-13) | Same electrical specs but axial-leaded DO-13 package; 1.0 W power rating; no RoHS suffix option | Requires through-hole assembly; unsuitable for high-density SMT layouts or automated reflow lines | Select only when legacy through-hole compatibility or lower cost outweighs surface-mount density and reliability benefits |
| BZX85C7V5 (DO-41) | Plastic-packaged, 1.3 W rating, ±5% tolerance, 10 Ω Zener impedance at 34 mA, 10 μA IR at 5.7 V | Lacks hermeticity and radiation hardness; not qualified to MIL-PRF-19500; limited to commercial temperature range | Acceptable for cost-sensitive consumer applications where environmental robustness and extended temperature operation are noncritical |
Compared with 1N3017B and BZX85C7V5, the 1N3017BUR-1 delivers superior thermal performance (40°C/W vs. >100°C/W), lower leakage (0.5 μA vs. 10 μA), and guaranteed radiation tolerance - justifying its use in mission-critical aerospace, defense, and industrial systems despite higher unit cost.
Availability
1N3017BUR-1 is available at Aetrix Electronics and suitable for switch-mode power supplies, aerospace voltage references, industrial sensor excitation, and military-grade power monitors requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3017BUR-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 (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 1N3017BUR-1 belongs to Microsemi's legacy glass Zener diode family designed specifically for applications demanding hermetic sealing, wide temperature operation, and MIL-PRF-19500 qualification pathways - targeting power regulation in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance for 1N3017BUR-1?
The 1N3017BUR-1 has a nominal Zener voltage of 7.5 V with a tolerance of ±5%, indicated by the "B" suffix per Note 1. This tighter tolerance ensures predictable regulation in feedback networks where output accuracy is critical, such as in medical power supplies or test equipment references.
Is 1N3017BUR-1 RoHS compliant?
Yes, the "e3" suffix in 1N3017BUR-1 denotes RoHS compliance with annealed matte-tin plating. It meets JEDEC J-STD-020 reflow requirements (260°C for 10 seconds) and is qualified for lead-free assembly without compromising solder joint integrity or long-term reliability.
What is the maximum power dissipation of 1N3017BUR-1 at 25°C?
The 1N3017BUR-1 is rated for 1.5 W steady-state power dissipation at 25°C end-cap temperature (TEC < 115°C). When mounted on FR4 with 1 oz copper and the recommended footprint, its derated power drops to 1.25 W at 25°C ambient (TA), per Figure 1 derating curve.
Does 1N3017BUR-1 require special ESD handling?
No - the 1N3017BUR-1 is explicitly stated as nonsensitive to ESD in the datasheet. It does not require static-safe packaging, wrist straps, or ionized workstations during handling or assembly, simplifying integration into high-volume manufacturing lines.
Can 1N3017BUR-1 be used in radiation-intensive environments?
Yes, the 1N3017BUR-1 features inherent radiation hardness documented in Microsemi MicroNote 050. Its hermetic glass construction and metallurgical design make it suitable for low-dose-rate space applications and nuclear instrumentation without supplemental shielding or derating.
1N3017BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 4 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 5.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB
1N3017BUR-1 FAQ
1.How can I place an order for 1N3017BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3017BUR-1 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 1N3017BUR-1 reliable?
The price and inventory of 1N3017BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3017BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N3017BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3017BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3017BUR-1?
1N3017BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3017BUR-1 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 1N3017BUR-1?
For technical support, including 1N3017BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3017BUR-1 requirements.
6.How does Aetrix verify that 1N3017BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N3017BUR-1 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 1N3017BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N3017BUR-1?
All 1N3017BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3017BUR-1, 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 1N3017BUR-1 part is unused and in its original packaging.
Return procedure for 1N3017BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3017BUR-1 Tags
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