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Microchip Technology 1N5950BUR-1/TR
- Part No.:
- 1N5950BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AB, MELF (Glass)
- Datasheet:
-
1N5950BUR-1/TR.pdf
- Description:
- DIODE ZENER 110V 1.25W DO213AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,572
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Product details
Overview
1N5950BUR-1/TR from Microsemi is a 1.5 W, 110 V Zener diode in DO-213AB (MELF) glass package, rated for ±5% voltage tolerance, with 3.4 mA test current, 300 Ω dynamic impedance at IZT, and 15 mA maximum Zener current. It delivers stable voltage regulation in high-density power supply rails and precision reference circuits across industrial temperature range.
For engineers reviewing the 1N5950BUR-1/TR datasheet, 1N5950BUR-1/TR pinout, 1N5950BUR-1/TR application, or 1N5950BUR-1/TR equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (RθJA = 120 °C/W), hermetic glass packaging, MIL-PRF-19500 screening compatibility, and RoHS-compliant matte tin plating.
Technical Context
This device operates as a two-terminal voltage regulator in reverse breakdown mode, with specified Zener voltage (VZ = 110 V) measured at TEC = 30 °C and IZT = 3.4 mA. Its metallurgically bonded tungsten slug construction ensures low thermal resistance (RθJEC = 40 °C/W) and enhanced reliability under thermal cycling.
The DO-213AB MELF package provides hermetic glass sealing, non-ESD-sensitive operation per MIL-STD-750 Method 1020, and inherent radiation hardness per MicroNote 050. Capacitance is characterized versus Zener voltage (Figure 2), and power derating follows a defined curve above 115 °C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 110 V ±5% at IZT = 3.4 mA - defines precise regulation point for feedback loops and reference generation. |
| Power Dissipation (PD) | 1.5 W @ TEC ≤ 115 °C - supports continuous operation in compact layouts with controlled end-cap heating. |
| Dynamic Impedance (ZZT) | 300 Ω at IZT = 3.4 mA - determines output voltage stability under load transients in regulated supplies. |
| Max Zener Current (IZM) | 13 mA - sets upper limit for safe DC biasing without exceeding thermal limits or degrading long-term stability. |
| Junction Temp Range | –65 to +175 °C - enables deployment in extended industrial, aerospace, and downhole environments. |
| Thermal Resistance (RθJA) | 120 °C/W on FR4 (1 oz Cu) - informs PCB copper area requirements for thermal management in surface-mount designs. |
| Forward Voltage (VF) | 1.2 V max @ 200 mA - relevant for polarity protection or series-switching configurations during forward conduction. |
Pinout & Package
DO-213AB (MELF) glass package: cylindrical hermetically sealed body with cathode band marking; no leads - terminals are metallized end caps. Cathode is banded end; device operates with banded end positive relative to opposite end in Zener mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail; voltage referenced to anode; polarity critical for correct Zener operation. |
| Anode (unbanded end) | Reference/return node | Typically tied to system ground or lower-potential node; completes reverse-bias path for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded tungsten slugs | Reduces thermal resistance (RθJEC = 40 °C/W) and improves long-term parameter stability under thermal stress. |
| Hermetically sealed voidless glass case | Prevents moisture ingress and parametric drift; supports high-reliability applications requiring MIL-PRF-19500 screening. |
| RoHS-compliant matte tin plating | Ensures solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles (TSP = 260 °C). |
| Non-ESD-sensitive design | Eliminates need for ESD handling controls per MIL-STD-750 Method 1020 - simplifies assembly and field service. |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for space-qualified and nuclear instrumentation applications. |
Applications
| Industrial Power Supply Reference | Aerospace Voltage Clamp |
|---|---|
Use Scenario: Precision 110 V reference in isolated flyback auxiliary winding feedback networks for telecom rectifiers. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing stable feedback threshold for optocoupler-driven PWM controllers. Use Value: ±5% VZ tolerance and 300 Ω ZZT ensure <1% output voltage drift over line/load/temperature in Class II safety-isolated designs. |
Use Scenario: Overvoltage clamp protecting avionics bus monitoring ICs against transient surges up to 150 V. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy during lightning-induced spikes on 28 V DC distribution lines. Use Value: Hermetic glass package and –65 to +175 °C rating maintain clamping integrity across flight envelope extremes. |
| Downhole Sensor Biasing | Radiation-Hardened Instrumentation |
Use Scenario: Stable bias voltage source for piezoresistive pressure transducers in oil/gas wellhead electronics. IC Role / Device Role / Timing Role: Zener-regulated excitation supply ensuring constant bridge current despite battery voltage decay. Use Value: Metallurgical bond and RθJEC = 40 °C/W sustain regulation accuracy at 150 °C ambient without active cooling. |
Use Scenario: Reference element in nuclear reactor control rod position sensors exposed to gamma flux. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference maintaining calibration integrity in high-dose environments. Use Value: Inherent radiation hardness per MicroNote 050 eliminates need for shielding or derating in >10 krad(Si) applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5950B-TR | Same electrical specs but in DO-41 axial-leaded package; higher RθJA (200 °C/W), no MIL-PRF-19500 screening option. | Suitable for prototyping or through-hole boards; not recommended for high-density SMT or screened military use. | Select when board assembly uses wave soldering or requires axial form factor; avoid for space-constrained or high-reliability SMT designs. |
| SMBG5950B | Same VZ, but in SMB package; lower PD (1.0 W), higher capacitance, no hermetic seal, RoHS only. | Acceptable for commercial-grade consumer power supplies; unsuitable for high-temp, high-reliability, or radiation environments. | Choose for cost-sensitive, non-critical applications where footprint and reflow compatibility outweigh reliability needs. |
Compared with 1N5950B-TR and SMBG5950B, the 1N5950BUR-1/TR uniquely combines hermetic MELF packaging, MIL-PRF-19500 screening capability, and 1.5 W power handling - making it the only option qualified for extended-temperature, high-reliability, and radiation-tolerant Zener regulation.
Availability
1N5950BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace voltage clamping, downhole sensor biasing, and radiation-hardened instrumentation requiring stable component supply across extended temperature and reliability requirements.
Supply support for 1N5950BUR-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, radiation-tolerant, and defense-grade analog and mixed-signal components.
The 1N59xxBUR-1 series was designed specifically for high-density, high-reliability surface-mount Zener regulation - targeting aerospace, defense, oil & gas, and medical systems where hermeticity, thermal robustness, and MIL-spec compliance are mandatory.
FAQ
What is the Zener voltage tolerance and test condition for 1N5950BUR-1/TR?
The 1N5950BUR-1/TR has a Zener voltage tolerance of ±5%, specified at a test current (IZT) of 3.4 mA and end-cap temperature (TEC) of 30 °C. Voltage measurement is performed 90 seconds after applying DC current to ensure thermal stabilization. This tolerance directly impacts regulation accuracy in feedback networks and reference circuits.
Is 1N5950BUR-1/TR compatible with lead-free reflow processes?
Yes, the 1N5950BUR-1/TR features RoHS-compliant matte tin plating and is rated for solder temperature up to 260 °C for 10 seconds, fully compliant with IPC/JEDEC J-STD-020 reflow profiles. Its glass MELF body withstands thermal shock without cracking, making it suitable for standard lead-free assembly lines.
Does 1N5950BUR-1/TR require special handling for ESD sensitivity?
No - the 1N5950BUR-1/TR is explicitly specified as non-sensitive to ESD per MIL-STD-750 Method 1020. Its metallurgically bonded structure and glass encapsulation eliminate gate oxide or junction vulnerability, allowing standard handling without ESD workstations or packaging for this device.
Can 1N5950BUR-1/TR be used in high-radiation environments?
Yes, the 1N5950BUR-1/TR exhibits inherent radiation hardness as documented in Microsemi MicroNote 050. It maintains stable Zener voltage and leakage characteristics under gamma irradiation, making it suitable for nuclear instrumentation and space-qualified systems without additional hardening measures.
What is the maximum steady-state power dissipation for 1N5950BUR-1/TR at 25 °C ambient?
The 1N5950BUR-1/TR has a rated average power dissipation (PM(AV)) of 1.5 W, but its steady-state power dissipation at TA = 25 °C is limited to 1.25 W due to thermal resistance constraints (RθJA = 120 °C/W). Derating begins above 115 °C end-cap temperature per Figure 1.
1N5950BUR-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):
- 110 V
- Tolerance:
- ±5%
- Power - Max:
- 1.25 W
- Impedance (Max) (Zzt):
- 300 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 83.6 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)
1N5950BUR-1/TR FAQ
1.How can I place an order for 1N5950BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5950BUR-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 1N5950BUR-1/TR reliable?
The price and inventory of 1N5950BUR-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 1N5950BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5950BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5950BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5950BUR-1/TR?
1N5950BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5950BUR-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 1N5950BUR-1/TR?
For technical support, including 1N5950BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5950BUR-1/TR requirements.
6.How does Aetrix verify that 1N5950BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5950BUR-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 1N5950BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5950BUR-1/TR?
All 1N5950BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5950BUR-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 1N5950BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5950BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5950BUR-1/TR Tags
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