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Microchip Technology 1N5240BUR-1
- Part No.:
- 1N5240BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5240BUR-1.pdf
- Description:
- DIODE ZENER 10V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,076
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Product details
Overview
1N5240BUR-1 from Microsemi is a 10 V, 500 mW surface-mount Zener diode in DO-213AA (SOD80) MELF package, rated for ±5% tolerance at 20 mA test current, with 17 Ω dynamic impedance and +0.075 %/°C temperature coefficient. It regulates voltage in low-power reference and bias circuits across industrial temperature ranges.
For engineers reviewing the 1N5240BUR-1 datasheet, 1N5240BUR-1 pinout, 1N5240BUR-1 application, or 1N5240BUR-1 equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for precision voltage reference design.
Technical Context
The 1N5240BUR-1 operates as a two-terminal voltage reference diode, conducting in reverse breakdown to maintain stable 10 V output across 0.25–20 mA regulation current. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050.
It exhibits minimal junction capacitance (~3 pF typical), low leakage (<3 µA at 7.6 V), and a positive temperature coefficient (+0.075 %/°C), making it suitable for temperature-stable biasing where drift compensation is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 10 V ±5% at IZT = 20 mA - defines nominal regulation point for stable reference generation |
| Power Dissipation PD | 0.5 W - limits continuous power handling on FR4 board with 1 oz Cu and recommended footprint |
| Dynamic Impedance ZZT | 17 Ω at IZT = 20 mA - determines output voltage variation under load current changes |
| Temp. Coefficient αVZ | +0.075 %/°C - quantifies voltage drift over temperature; positive slope aids compensation in some topologies |
| Max Reverse Leakage IR | 3 µA at VR = 7.6 V - ensures low standby current in high-impedance bias networks |
| Junction Temp Range TJ | –65 °C to +175 °C - supports operation in extended industrial and aerospace environments |
| Forward Voltage VF | 1.1 V max at IF = 200 mA - relevant for forward-conduction protection or dual-mode use cases |
Pinout & Package
DO-213AA (SOD80 or MLL34) metallurgically bonded glass MELF package with cathode band marking; terminals are end caps plated with annealed matte tin (RoHS compliant) or tin-lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection in reverse-bias configuration | Must be held at higher potential than anode to enable breakdown regulation; polarity critical for correct operation |
| Anode (unbanded end) | Zener cathode connection in reverse-bias configuration | Reference ground or return node; forms regulated output at cathode when anode is grounded |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass MELF package | Enables long-term reliability and moisture resistance without conformal coating in harsh environments |
| Metallurgical bonding | Provides superior thermal transfer and mechanical stability versus epoxy-bonded alternatives |
| Radiation hardness per MicroNote 050 | Supports use in space-qualified or high-radiation terrestrial applications without additional shielding |
| ESD insensitivity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly of sensitive analog circuits |
| RoHS-compliant commercial grade option | Meets environmental compliance requirements while retaining full electrical performance |
Applications
| Voltage Reference for ADC/DAC Biasing | Low-Power Sensor Excitation |
|---|---|
Use Scenario: Providing stable 10 V reference to 12-bit SAR ADC input buffers and DAC feedback networks in portable instrumentation. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precise analog ground-referenced excitation level. Use Value: 17 Ω ZZT and +0.075 %/°C αVZ ensure <±1 LSB error over –40 °C to +85 °C ambient range. | Use Scenario: Supplying regulated excitation voltage to resistive bridge sensors (e.g., strain gauges) in battery-powered condition monitoring nodes. IC Role / Device Role / Timing Role: Low-current Zener regulator maintaining constant bias across sensor elements during variable supply conditions. Use Value: 3 µA max leakage at 7.6 V enables >10-year battery life in 10 µA average current systems. |
| Microcontroller Reset Circuitry | Overvoltage Clamp in Signal Conditioning |
Use Scenario: Generating clean 10 V threshold for RC-based reset timing in industrial microcontrollers operating from unregulated 12 V rails. IC Role / Device Role / Timing Role: Precision voltage threshold element defining reset assertion level independent of supply ripple. Use Value: ±5% tolerance and 0.5 W rating allow reliable triggering across voltage transients up to 15 V without thermal runaway. | Use Scenario: Clamping analog signal paths (e.g., op-amp outputs) to prevent damage from ESD or transient overvoltage events. IC Role / Device Role / Timing Role: Fast-reacting shunt clamp limiting peak voltage to 10 V + Vf during surge conditions. Use Value: Minimal 3 pF junction capacitance preserves signal integrity up to 10 MHz in high-speed conditioning stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5240B-1 | Same 10 V ±5% spec but in axial DO-35 (DO-204AH) package; no RoHS option; higher RθJA (300 °C/W) | Requires through-hole PCB layout; unsuitable for automated SMT assembly or space-constrained designs | Select when legacy through-hole compatibility or manual prototyping is prioritized over density or compliance |
| BZX55C10 | 10 V ±5%, 500 mW, DO-35 package; 20 Ω ZZT; –65 °C to +175 °C; no radiation hardness or MIL-PRF-19500 screening | Lacks metallurgical bond and radiation hardening; not qualified for aerospace or high-reliability mil-spec programs | Choose for cost-sensitive commercial applications where radiation tolerance and hermetic sealing are unnecessary |
Compared with 1N5240B-1 and BZX55C10, the 1N5240BUR-1 uniquely combines SMT-compatible DO-213AA packaging, RoHS compliance, radiation hardness, and MIL-PRF-19500 up-screening capability-making it the only choice for high-integrity, surface-mount voltage reference needs.
Availability
1N5240BUR-1 is available at Aetrix Electronics and suitable for voltage reference, sensor excitation, and microcontroller reset applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1N5240BUR-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) specialized in high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series was designed to deliver JEDEC-standard Zener performance in hermetically sealed, surface-mount MELF packages with radiation tolerance and military-grade screening options.
FAQ
What is the Zener voltage tolerance and test current for the 1N5240BUR-1?
The 1N5240BUR-1 has a nominal Zener voltage of 10 V with ±5% tolerance, measured at a test current IZT of 20 mA. This tolerance is guaranteed per the "B" suffix in the part number and applies under standard 25 °C conditions with thermal equilibrium established after 20 seconds of stabilization.
Does the 1N5240BUR-1 support RoHS compliance?
Yes, the 1N5240BUR-1 is available in RoHS-compliant versions (marked with "e3" suffix) for commercial-grade use. The RoHS-compliant variant uses annealed matte-tin plating on end caps and meets lead-free soldering requirements per J-STD-020, with maximum solder temperature of 260 °C for 10 seconds.
What is the maximum power dissipation and thermal derating behavior of the 1N5240BUR-1?
The 1N5240BUR-1 has a steady-state power dissipation rating of 0.5 W at end cap temperature <125 °C or ambient <50 °C on FR4 with 1 oz Cu. Derating begins linearly above 50 °C ambient, reaching zero power at 125 °C ambient, per Figure 2 in the official datasheet T4-LDS-0232-1.
Is the 1N5240BUR-1 suitable for high-reliability or radiation-prone environments?
Yes, the 1N5240BUR-1 is inherently radiation-hardened per Microsemi MicroNote 050 and supports up-screening to MIL-PRF-19500 standards. Its metallurgically bonded glass construction and hermetic seal make it appropriate for aerospace, downhole, and nuclear instrumentation applications where total ionizing dose tolerance is required.
What package type and marking does the 1N5240BUR-1 use?
The 1N5240BUR-1 uses the DO-213AA (SOD80 or MLL34) glass MELF package with cathode indicated by a single band. It weighs 0.04 g and features tin-lead or RoHS-compliant matte-tin end-cap plating, solderable per MIL-STD-750 Method 2026.
1N5240BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 200 mA
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-213AA
1N5240BUR-1 FAQ
1.How can I place an order for 1N5240BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5240BUR-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 1N5240BUR-1 reliable?
The price and inventory of 1N5240BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5240BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5240BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5240BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5240BUR-1?
1N5240BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5240BUR-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 1N5240BUR-1?
For technical support, including 1N5240BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5240BUR-1 requirements.
6.How does Aetrix verify that 1N5240BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5240BUR-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 1N5240BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5240BUR-1?
All 1N5240BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5240BUR-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 1N5240BUR-1 part is unused and in its original packaging.
Return procedure for 1N5240BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5240BUR-1 Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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SMAJ4744A-TP
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