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Microchip Technology 1N3048BUR-1/TR
- Part No.:
- 1N3048BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N3048BUR-1/TR.pdf
- Description:
- DIODE ZENER 150V 1.5W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,041
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Product details
Overview
1N3048BUR-1/TR from Microsemi is a surface-mount, hermetically sealed glass Zener diode in DO-213AB (MELF) package, rated for 1.5 W steady-state power dissipation at end-cap temperature <115°C, with nominal Zener voltage 150 V ±5%, Zener test current 1.7 mA, and maximum Zener impedance 1000 Ω at IZT - used for precision voltage regulation in high-reliability aerospace and industrial power supply circuits.
For engineers reviewing the 1N3048BUR-1/TR datasheet, 1N3048BUR-1/TR pinout, 1N3048BUR-1/TR application, or 1N3048BUR-1/TR equivalent, key selection criteria include its 150 V Zener voltage tolerance, low 0.5 μA reverse leakage at VR = 114 V, -65°C to +175°C operating temperature range, hermetic glass MELF construction, and RoHS-compliant e3 suffix option.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown when cathode voltage exceeds anode by ≥150 V. Its metallurgically enhanced internal contact design reduces thermal resistance (40°C/W junction-to-end-cap), enabling stable regulation across wide temperature excursions and high-density PCB layouts.
The DO-213AB glass MELF package provides inherent radiation hardness per MicroNote 050, low parasitic capacitance (specified in Figure 2), and ESD insensitivity - distinguishing it from plastic-packaged Zeners and supporting use in mission-critical analog monitoring and overvoltage protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ @ IZT | 150 V ±5% at 1.7 mA - defines precise regulation point for feedback loops in high-voltage DC-DC converters |
| Power Dissipation | 1.5 W at TEC < 115°C - supports continuous operation in thermally constrained enclosures without forced cooling |
| Zener Impedance ZZT | 1000 Ω @ IZT - ensures minimal output voltage variation under dynamic load transients |
| Reverse Leakage IR | 0.5 μA @ VR = 114 V - enables low-power standby regulation without significant quiescent current penalty |
| Operating Temperature | -65°C to +175°C - qualified for extended-range environments including downhole oil/gas and avionics systems |
| Package | DO-213AB (glass MELF) - provides hermetic sealing, low parasitics, and radiation hardness per MIL-PRF-19500/115 screening options |
| Forward Voltage VF | 1.2 V max @ 200 mA - allows safe forward-bias clamping during transient fault conditions |
Pinout & Package
DO-213AB glass MELF package: cylindrical, leadless, hermetically sealed glass body with cathode band marking; terminals are axial ends - no discrete pins; polarity indicated by single black band denoting cathode (operated with banded end positive relative to opposite end).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Breakdown terminal | Connected to regulated output node; must be held at higher potential than anode to enable Zener conduction |
| Anode (unbanded end) | Reference terminal | Typically tied to system ground or lower-potential rail; establishes reference for voltage clamp or shunt regulator function |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Enables long-term reliability in humid, corrosive, or vacuum environments without moisture ingress or parameter drift |
| Metallurgically enhanced contact | Reduces thermal resistance to 40°C/W (junction-to-end-cap), improving power handling and thermal stability vs. standard glass Zeners |
| Low reverse leakage (0.5 μA) | Minimizes standby current in high-impedance sensing or battery-backed circuits where leakage directly impacts battery life |
| Radiation-hardened design | Qualified per MicroNote 050 for total ionizing dose (TID) tolerance - suitable for space-grade and nuclear instrumentation applications |
| e3 RoHS-compliant plating | Tin-lead or matte-tin terminations meet JEDEC J-STD-020 reflow profiles and eliminate lead-based solder compatibility concerns |
Applications
| High-Voltage Power Supply Regulation | Aerospace Voltage Reference |
|---|---|
Use Scenario: Shunt regulation in 200 V DC bus monitoring circuit of satellite power management unit. IC Role / Device Role / Timing Role: Zener diode providing stable 150 V reference for ADC input scaling and overvoltage comparator threshold. Use Value: Hermetic DO-213AB package prevents parameter shift in vacuum; -65°C to +175°C rating supports orbital thermal cycling. |
Use Scenario: Precision voltage clamp in radiation-hardened telemetry signal conditioning front-end. IC Role / Device Role / Timing Role: Two-terminal shunt regulator protecting op-amp inputs from ESD and transient overvoltage events. Use Value: Inherent radiation hardness and 0.5 μA leakage ensure signal integrity and low false-trigger rate in deep-space missions. |
| Industrial Motor Drive Protection | Downhole Oil & Gas Sensor Biasing |
Use Scenario: Overvoltage suppression on gate driver supply rail in 600 V IGBT inverter stage. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting rail voltage spikes during switching transitions. Use Value: 1.5 W power rating and 1000 Ω Zener impedance maintain clamping accuracy under repetitive surge conditions. |
Use Scenario: Stable bias voltage source for piezoresistive pressure transducers in high-temperature wellhead electronics. IC Role / Device Role / Timing Role: Primary voltage reference generating fixed excitation for Wheatstone bridge sensor elements. Use Value: 150 V Zener voltage and ±5% tolerance ensure calibrated output across -55°C to +175°C operational envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N3048B (DO-13) | Same electrical specs but axial-leaded DO-13 package; lacks surface-mount compatibility and higher thermal resistance (junction-to-ambient ~150°C/W) | Requires through-hole PCB layout; unsuitable for high-density or automated SMT assembly | Select only if legacy board redesign is impractical and thermal derating margins allow |
| MMBZ5265B (SOT-23) | Lower power (0.35 W), lower voltage (68 V), silicon planar construction; higher leakage (~10 μA), no radiation hardness | Not suitable for >100 V regulation or harsh-environment deployment | Consider only for cost-sensitive, low-voltage consumer applications with no reliability or radiation requirements |
Compared with 1N3048B and MMBZ5265B, the 1N3048BUR-1/TR uniquely combines 150 V Zener voltage, 1.5 W power capability, DO-213AB hermetic packaging, and radiation tolerance - making it irreplaceable for high-reliability, high-voltage, surface-mount applications where long-term parametric stability is mandatory.
Availability
1N3048BUR-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole sensor biasing, and industrial motor drive protection requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for 1N3048BUR-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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-voltage analog components for defense, aerospace, and industrial markets.
The 1N3048BUR-1/TR belongs to Microsemi's legacy glass Zener diode family designed specifically for mission-critical voltage regulation where hermeticity, wide temperature operation, and parametric stability outweigh cost or size constraints.
FAQ
What is the Zener voltage tolerance for 1N3048BUR-1/TR?
The 1N3048BUR-1/TR has a nominal Zener voltage of 150 V with a tolerance of ±5%, indicated by the "B" suffix per manufacturer documentation. This tolerance is verified at 25°C with 1.7 mA test current and applies across the full -65°C to +175°C operating range, ensuring predictable regulation in precision feedback networks using the 1N3048BUR-1/TR.
Is 1N3048BUR-1/TR RoHS compliant?
Yes, the "e3" suffix in 1N3048BUR-1/TR denotes RoHS compliance with annealed matte-tin plating, qualified per JEDEC J-STD-020 reflow standards. The 1N3048BUR-1/TR meets lead-free soldering requirements up to 260°C for 10 seconds and is compatible with standard SMT assembly processes without modification.
What does the "TR" suffix mean in 1N3048BUR-1/TR?
The "TR" suffix indicates tape-and-reel packaging per EIA-481-1-A standard: 12 mm carrier tape, 1500 units per 7-inch reel. This format enables automated pick-and-place assembly. The 1N3048BUR-1/TR is not supplied in bulk or ammo-pack configurations unless specially ordered.
Can 1N3048BUR-1/TR replace 1N3048B in existing designs?
No - while electrically identical, 1N3048BUR-1/TR uses DO-213AB (MELF) surface-mount packaging versus DO-13 axial leads in 1N3048B. Substitution requires PCB footprint redesign, reflow profile validation, and thermal performance reassessment due to differing junction-to-ambient thermal resistance. The 1N3048BUR-1/TR is not a drop-in replacement for 1N3048B.
What screening options are available for 1N3048BUR-1/TR?
MIL-PRF-19500/115 screening is available via prefix additions: MQ (JAN), MX (JANTX), MV (JANTXV), or MSP (JANS). For example, MX1N3048BUR-1/TR meets JANTX specifications. These variants retain all electrical and mechanical characteristics of the base 1N3048BUR-1/TR while adding rigorous environmental and burn-in testing.
1N3048BUR-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):
- 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/TR FAQ
1.How can I place an order for 1N3048BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N3048BUR-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 1N3048BUR-1/TR reliable?
The price and inventory of 1N3048BUR-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 1N3048BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N3048BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N3048BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N3048BUR-1/TR?
1N3048BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N3048BUR-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 1N3048BUR-1/TR?
For technical support, including 1N3048BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N3048BUR-1/TR requirements.
6.How does Aetrix verify that 1N3048BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N3048BUR-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 1N3048BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N3048BUR-1/TR?
All 1N3048BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N3048BUR-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 1N3048BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N3048BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N3048BUR-1/TR Tags
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