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Microchip Technology 1N3048BUR-1
- Part No.:
- 1N3048BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3048BUR-1.pdf
- Description:
- DIODE ZENER 150V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
1N3048BUR-1 from Microsemi is a surface-mount glass Zener diode in DO-213AB (MELF) package, rated for 1.5 W power dissipation at 25°C, with nominal Zener voltage of 150 V ±5% (suffix B), 1.7 mA test current (IZT), 1000 Ω dynamic impedance (ZZT), and maximum reverse leakage of 0.5 μA at 114 V. It serves as a precision voltage reference and overvoltage clamp in high-reliability power supply regulation circuits.
For engineers reviewing the 1N3048BUR-1 datasheet, 1N3048BUR-1 pinout, 1N3048BUR-1 application, or 1N3048BUR-1 equivalent, key selection criteria include its hermetically sealed glass MELF construction, -65°C to +175°C operating temperature range, low thermal resistance (40°C/W junction-to-end-cap), radiation-hardened capability per MicroNote 050, and RoHS-compliant e3 variant availability.
Technical Context
This Zener diode operates in reverse breakdown mode with a sharp knee and stable regulation across wide current (1.7 mA IZT to 8.55 mA IZM) and temperature (-65°C to +175°C) ranges. Its metallurgically enhanced internal contact design reduces thermal resistance and improves long-term reliability under thermal cycling.
The device exhibits a typical Zener voltage temperature coefficient of +0.095%/°C and specified capacitance (per Figure 2), making it suitable for low-noise analog references and transient suppression where parasitic capacitance must be controlled. Its DO-213AB outline enables high-density SMT placement while maintaining hermeticity and low parasitics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 150 V ±5% - precise regulation point for high-voltage reference and clamping applications |
| Power Dissipation | 1.5 W at 25°C - supports robust thermal margin in compact SMT layouts on FR4 |
| Zener Test Current | 1.7 mA - establishes stable 0.25 W bias condition for accurate VZ measurement |
| Zener Impedance | 1000 Ω @ IZT - ensures minimal output voltage variation under load current changes |
| Reverse Leakage Current | 0.5 μA @ 114 V - guarantees low quiescent power loss in standby or high-impedance circuits |
| Operating Temperature | -65°C to +175°C - qualified for aerospace, downhole, and military environments |
| Package | DO-213AB (MELF) - glass hermetic seal with double-slug construction for reliability and low parasitics |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical, leadless, hermetically sealed; cathode indicated by single band; terminals are axial end caps; polarity requires banded end to be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to system ground or low-side return; defines Zener regulation reference potential |
| Cathode (banded end) | Regulated output node | Provides stable 150 V output when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and intermetallic degradation-critical for >10-year field life in harsh environments |
| Metallurgically enhanced contacts | Reduces thermal resistance to 40°C/W junction-to-end-cap, enabling higher sustained power in confined layouts |
| Radiation hardness | Inherently qualified per MicroNote 050-supports TID tolerance in space and nuclear instrumentation |
| ESD insensitivity | No special handling required-simplifies manufacturing and field service in uncontrolled environments |
| MIL-PRF-19500 screening options | MQ/MX/MV prefixes enable JAN/JANTX/JANTXV qualification without redesign or requalification |
Applications
| High-Voltage Power Supply Regulation | Aerospace Avionics Reference |
|---|---|
Use Scenario: Stabilizing 150 V rail in DC-DC converter feedback loop for satellite power management units. IC Role / Device Role / Timing Role: Precision Zener reference providing error amplifier setpoint; replaces bulkier TO-204/DO-13 alternatives. Use Value: Hermetic DO-213AB package withstands vacuum outgassing and thermal shock during launch cycles; ±5% tolerance ensures closed-loop accuracy without trimming. |
Use Scenario: Generating stable 150 V bias for photomultiplier tube (PMT) gain control in radiation detection payloads. IC Role / Device Role / Timing Role: Low-drift, radiation-hardened voltage reference ensuring consistent PMT gain across mission lifetime. Use Value: +0.095%/°C tempco and -65°C to +175°C rating maintain calibration stability across orbital thermal extremes. |
| Downhole Oilfield Instrumentation | Military Radar Bias Supply |
Use Scenario: Clamping transient overvoltage on 120–160 V sensor bus in borehole telemetry systems exposed to 175°C ambient. IC Role / Device Role / Timing Role: Overvoltage protection element absorbing surge energy while holding bus within safe limits. Use Value: Glass MELF construction survives prolonged high-temperature exposure; 1.5 W rating handles repetitive transients without parametric shift. |
Use Scenario: Providing regulated 150 V supply for traveling-wave tube (TWT) collector bias in ground-based radar transmitters. IC Role / Device Role / Timing Role: High-stability Zener reference in linear regulator feedback network for collector voltage control. Use Value: Tight 1000 Ω ZZT minimizes ripple coupling into sensitive RF stages; RoHS-compliant e3 variant meets defense logistics requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | 14 V nominal, 1 W rating, DO-41 package, ±5% tolerance, 20 Ω ZT | Lower voltage, lower power, through-hole only-unsuitable for 150 V or SMT high-density designs | Select only if system voltage is ≤15 V and board real estate allows axial leads |
| BZX85C150 | 150 V nominal, 1.3 W rating, DO-41 package, ±5% tolerance, 500 Ω ZT | Same voltage but lower power and higher ZT; plastic package lacks hermeticity and radiation hardness | Acceptable for commercial-grade 150 V reference where MIL-spec reliability and 1.5 W headroom are not required |
Compared with 1N4744A and BZX85C150, the 1N3048BUR-1 delivers unique value in high-voltage, high-reliability SMT applications-its 1.5 W rating, DO-213AB hermeticity, -65°C to +175°C range, and radiation hardness make it irreplaceable in aerospace, defense, and oilfield electronics where failure is not an option.
Availability
1N3048BUR-1 is available at Aetrix Electronics and suitable for high-reliability power supply regulation, aerospace voltage reference, downhole instrumentation, and military radar bias supply requiring stable component supply across extended temperature and radiation environments.
Supply support for 1N3048BUR-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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N3048BUR-1 belongs to Microsemi's legacy glass Zener diode family designed specifically for mission-critical voltage regulation where hermeticity, wide temperature operation, and long-term parametric stability are mandatory-not general-purpose replacement parts.
FAQ
What is the Zener voltage tolerance for 1N3048BUR-1?
The "B" suffix in 1N3048BUR-1 denotes a ±5% tolerance on the nominal 150 V Zener voltage, measured at 1.7 mA test current and 25°C. This tighter tolerance than standard ±20% variants enables higher-accuracy regulation without external trimming. The 1N3048BUR-1 achieves this via process-controlled doping and metallurgical contact optimization.
Is 1N3048BUR-1 RoHS compliant?
Yes, the 1N3048BUR-1 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N3048BUR-1e3), indicating annealed matte-tin plating per MIL-STD-750, method 2026. Standard versions use tin-lead terminations; the e3 variant replaces lead with compliant materials while preserving solderability and thermal performance.
What is the maximum steady-state power dissipation for 1N3048BUR-1 on FR4 PCB?
When mounted on FR4 with 1 oz copper and the recommended footprint, the 1N3048BUR-1 delivers 1.25 W at 25°C ambient (TA), derating linearly to zero at 150°C ambient. This is based on a measured 120°C/W junction-to-ambient thermal resistance-distinct from its 40°C/W junction-to-end-cap rating used in heatsink-mounted configurations.
Does 1N3048BUR-1 require special handling for ESD sensitivity?
No, the 1N3048BUR-1 is explicitly characterized as nonsensitive to ESD per its datasheet. Its glass MELF construction and metallurgically enhanced contacts eliminate gate oxide or junction vulnerability found in MOS devices. Standard handling procedures apply-no ionizers, wrist straps, or shielded packaging are required.
Can 1N3048BUR-1 be used in radiation-intensive environments?
Yes, the 1N3048BUR-1 is inherently radiation hard as documented in Microsemi MicroNote 050. Its hermetic glass package and silicon processing yield high total ionizing dose (TID) tolerance-validated for space and nuclear instrumentation use. No additional radiation screening is needed beyond standard MQ/MX/MV options for enhanced assurance.
1N3048BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AB, MELF (Glass)
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 150 V
- Tolerance:
- ±5%
- Power - Max:
- 1.5 W
- Impedance (Max) (Zzt):
- 1000 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 114 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AB (MELF, LL41)
1N3048BUR-1 FAQ
1.How can I place an order for 1N3048BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3048BUR-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 1N3048BUR-1 reliable?
The price and inventory of 1N3048BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N3048BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N3048BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3048BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3048BUR-1?
1N3048BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3048BUR-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 1N3048BUR-1?
For technical support, including 1N3048BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3048BUR-1 requirements.
6.How does Aetrix verify that 1N3048BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N3048BUR-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 1N3048BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N3048BUR-1?
All 1N3048BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N3048BUR-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 1N3048BUR-1 part is unused and in its original packaging.
Return procedure for 1N3048BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3048BUR-1 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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