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Microchip Technology 1N5242BUR-1/TR
- Part No.:
- 1N5242BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5242BUR-1/TR.pdf
- Description:
- DIODE ZENER 12V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:204
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Product details
Overview
1N5242BUR-1/TR from Microsemi is a 12 V, 5% tolerance, 500 mW surface-mount Zener diode in DO-213AA (SOD-80/MELF) glass package, designed for precision voltage regulation in low-power analog circuits, reference supplies, and overvoltage protection at 20 mA test current with 30 Ω dynamic impedance.
For engineers reviewing the 1N5242BUR-1/TR datasheet, 1N5242BUR-1/TR pinout, 1N5242BUR-1/TR application, or 1N5242BUR-1/TR equivalent, this page delivers verified electrical specs, thermal derating behavior, RoHS-compliant packaging details, and direct alternatives for stable voltage reference design across industrial and aerospace-grade systems.
Technical Context
This Zener operates in reverse breakdown with cathode-banded polarity, requiring the banded end to be held positive relative to the anode for regulation. Its metallurgically bonded glass construction ensures hermetic sealing and radiation hardness per MicroNote 050, supporting operation from –65 °C to +175 °C junction temperature.
The device exhibits a +0.077 %/°C temperature coefficient and minimal capacitance (typical <2 pF), enabling stable DC reference performance across wide temperature ranges without significant drift or AC coupling effects in feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 12 V ±5% at IZT = 20 mA - defines precise regulation point for biasing, clamping, or reference generation |
| Power Dissipation PD | 0.5 W - limits continuous DC power handling; requires thermal derating above 50 °C ambient or 125 °C end cap |
| Dynamic Impedance ZZT | 30 Ω @ 20 mA - determines output voltage stability under load variation; lower value improves regulation accuracy |
| Reverse Leakage IR | 1.0 µA @ VR = 9.1 V - ensures negligible current draw in standby, critical for low-power battery-backed references |
| Temp. Coefficient αVZ | +0.077 %/°C - quantifies voltage drift with temperature; enables compensation in precision analog designs |
| Forward Voltage VF | 1.1 V max @ 200 mA - defines forward conduction threshold; relevant for polarity-sensitive protection circuits |
| Junction Temp. Range | –65 °C to +175 °C - supports extended environmental operation in automotive, military, and downhole applications |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package with two end-cap terminals. Cathode identified by single black band; anode is unmarked end. RoHS-compliant matte-tin plating on commercial-grade parts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher potential in Zener mode; sinks current to maintain fixed 12 V drop across load |
| Anode (unmarked end) | Reference ground node | Typically tied to circuit common; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgical bonding | Eliminates interfacial voids and delamination risk, ensuring long-term reliability under thermal cycling |
| Hermetic glass seal | Prevents moisture ingress and parameter shift over time, critical for mission-critical analog references |
| MIL-PRF-19500 up-screening option | Enables qualification for high-reliability programs including aerospace and defense without redesign |
| Low capacitance (<2 pF typical) | Minimizes signal coupling and phase shift in high-frequency feedback paths and RF detector circuits |
| Radiation hardness (per MicroNote 050) | Supports operation in space, nuclear, or high-altitude environments where total ionizing dose matters |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 12 V reference for linear regulators or ADC voltage references in industrial PLC modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage independent of supply variation. Use Value: Delivers ±5% tolerance and +0.077 %/°C TC for predictable error budgeting in 12-bit measurement systems. | Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 12 V in automotive body control units. IC Role / Device Role / Timing Role: Shunting excess energy to ground when input exceeds 12 V, limiting voltage stress on downstream logic. Use Value: Withstands 0.5 W peak dissipation and responds within nanoseconds due to low junction capacitance. |
| Current Source Bias | Temperature-Stable Oscillator Trim |
Use Scenario: Setting bias current for op-amp-based constant-current sources in sensor front-ends. IC Role / Device Role / Timing Role: Acting as voltage-controlled current sink via series resistor to establish repeatable IOUT. Use Value: Maintains regulation across –40 °C to +85 °C ambient with <±0.1 V drift, ensuring consistent sensor excitation. | Use Scenario: Compensating oscillator frequency drift in crystal-based real-time clocks using voltage-dependent varactor tuning. IC Role / Device Role / Timing Role: Delivering stable 12 V reference to adjust varactor bias, counteracting crystal TC. Use Value: +0.077 %/°C TC matches typical crystal pull range, enabling first-order temperature compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5242B-1/TR | Same 12 V, 5% spec but in axial DO-35 package; no MELF form factor or hermetic glass seal | Limited to PCBs with through-hole mounting; unsuitable for high-vibration or hermetic assemblies | Select when legacy footprint compatibility outweighs surface-mount density and reliability needs |
| BZX55C12-TR | 12 V, 5% Zener in SOD-323 package; 400 mW rating, 35 Ω ZZT, non-hermetic plastic body | Lower power and thermal robustness; not radiation-hardened or MIL-qualified | Choose for cost-sensitive consumer designs where extended temperature or reliability is not required |
Compared with 1N5242B-1/TR and BZX55C12-TR, the 1N5242BUR-1/TR offers superior thermal resistance (100 °C/W to end cap), hermetic reliability, and radiation tolerance-making it the only choice for high-integrity analog references in harsh environments.
Availability
1N5242BUR-1/TR is available at Aetrix Electronics and suitable for industrial power supplies, aerospace avionics reference circuits, and automotive engine control modules requiring stable component supply with traceable sourcing and long-lifecycle support.
Supply support for 1N5242BUR-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 analog, RF, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N52xxBUR-1 series belongs to Microsemi's precision Zener voltage regulator product line, engineered for applications demanding stable DC references under extreme temperature, radiation, and mechanical stress conditions.
FAQ
What is the Zener voltage tolerance of the 1N5242BUR-1/TR?
The 1N5242BUR-1/TR has a nominal Zener voltage of 12 V with a guaranteed tolerance of ±5%, as indicated by the "B" suffix in its part number per Microsemi's nomenclature. This tolerance is validated at 20 mA test current and 25 °C ambient, and applies across the full operating temperature range when used within thermal derating limits.
Is the 1N5242BUR-1/TR RoHS compliant?
Yes, the 1N5242BUR-1/TR is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer part number (1N5242BUR-1/TR e3). RoHS compliance applies to commercial-grade versions only and covers lead-free matte-tin terminal plating per EU Directive 2011/65/EU.
What is the maximum power dissipation for the 1N5242BUR-1/TR?
The 1N5242BUR-1/TR has a steady-state power dissipation rating of 0.5 W. This limit applies only when the end cap temperature remains below 125 °C or ambient temperature stays under 50 °C on a standard FR4 board with 1 oz copper and recommended footprint; derating is required beyond those conditions per Figure 2 in the datasheet.
Does the 1N5242BUR-1/TR have radiation hardness certification?
Yes, the 1N5242BUR-1/TR is inherently radiation hard per Microsemi MicroNote 050, a documented radiation effects characterization report. This makes the 1N5242BUR-1/TR suitable for low-dose-rate TID environments such as space-qualified instruments and nuclear facility monitoring equipment.
What package type does the 1N5242BUR-1/TR use?
The 1N5242BUR-1/TR uses the DO-213AA (also known as SOD-80 or MELF) metallurgically bonded glass surface-mount package. It features hermetic sealing, end-cap terminations, and a cathode band marking-distinct from axial DO-35 or plastic SOD-323 packages used by other 12 V Zeners.
1N5242BUR-1/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 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
1N5242BUR-1/TR FAQ
1.How can I place an order for 1N5242BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5242BUR-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 1N5242BUR-1/TR reliable?
The price and inventory of 1N5242BUR-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 1N5242BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5242BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5242BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5242BUR-1/TR?
1N5242BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5242BUR-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 1N5242BUR-1/TR?
For technical support, including 1N5242BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5242BUR-1/TR requirements.
6.How does Aetrix verify that 1N5242BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5242BUR-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 1N5242BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5242BUR-1/TR?
All 1N5242BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5242BUR-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 1N5242BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5242BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5242BUR-1/TR Tags
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