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Microchip Technology 1N5222BUR-1
- Part No.:
- 1N5222BUR-1
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5222BUR-1.pdf
- Description:
- DIODE ZENER 2.5V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,827
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Product details
Overview
1N5222BUR-1 from Microsemi is a 2.5 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. It delivers stable regulation at 20 mA test current with 30 Ω dynamic impedance and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the 1N5222BUR-1 datasheet, 1N5222BUR-1 pinout, 1N5222BUR-1 application, or 1N5222BUR-1 equivalent, key selection factors include its 2.5 V nominal Zener voltage, 5% tolerance, 30 Ω Zener impedance at 20 mA, hermetically sealed MELF construction, and compatibility with automated SMT assembly per EIA-481-B tape-and-reel.
Technical Context
This device functions as a two-terminal reverse-biased voltage reference, operating in the Zener breakdown region with specified regulation at IZT = 20 mA. Its metallurgically bonded glass structure ensures low leakage (≤100 µA at 0.95 V), minimal capacitance (typical <2 pF), and inherent radiation hardness per MicroNote 050.
The 1N5222BUR-1 exhibits a negative temperature coefficient of –0.085 %/°C, enabling predictable drift compensation in temperature-sensitive references. Thermal resistance is 250 °C/W junction-to-ambient on FR4 (1 oz Cu), requiring derating above 50 °C ambient or 125 °C end-cap temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage (VZ) | 2.5 V at 20 mA - defines precise regulation point for low-voltage biasing and reference generation. |
| Zener Tolerance | ±5% - ensures consistent voltage accuracy across production lots without binning. |
| Zener Impedance (ZZT) | 30 Ω at 20 mA - limits output voltage variation under load changes, critical for stable reference performance. |
| Power Dissipation (PD) | 0.5 W - supports continuous regulation in space-constrained PCB layouts with adequate thermal relief. |
| Junction Temperature Range | –65 °C to +175 °C - enables operation in harsh industrial, aerospace, and downhole environments. |
| Reverse Leakage Current (IR) | ≤100 µA at 0.95 V - minimizes standby power loss and preserves regulation integrity near knee voltage. |
| Forward Voltage (VF) | 1.1 V max at 200 mA - allows use as a low-drop rectifier or clamp in dual-polarity protection schemes. |
Pinout & Package
DO-213AA (SOD-80 / MELF) hermetically sealed glass package with axial symmetry and cathode band marking. End-cap terminals are solderable per MIL-STD-750, method 2026. Weight: 0.04 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection during forward bias; regulated output node during reverse bias | Must be held positive relative to anode to enter Zener breakdown; polarity marking prevents orientation errors in automated placement. |
| Anode (unbanded end) | Reference ground or return path in regulation circuit | Serves as common return for bias current and load current; low-inductance end-cap contact supports high-frequency stability. |
Key Features
| Feature | Design Value |
|---|---|
| Metallurgically bonded glass construction | Eliminates interfacial delamination risk under thermal cycling, ensuring long-term reliability in mission-critical systems. |
| Hermetic sealing | Prevents moisture ingress and parameter drift over time, supporting >20-year shelf life and field longevity. |
| Minimal capacitance (typ. <2 pF) | Enables high-frequency noise suppression and fast transient response in RF bias and timing circuits. |
| ESD insensitivity (MIL-STD-750 Method 1020) | Withstands human-body-model discharges up to ±4 kV without parameter shift, simplifying handling and assembly. |
| Radiation hardness (per MicroNote 050) | Retains electrical characteristics after total ionizing dose exposure ≥100 krad(Si), suitable for space-grade applications. |
Applications
| Low-Voltage Reference Supply | Overvoltage Clamp for MCU I/O |
|---|---|
Use Scenario: Providing stable 2.5 V bias for ADC reference inputs and op-amp feedback networks in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with low tempco and minimal load regulation error. Use Value: Enables 12-bit ADC accuracy by limiting reference drift to <±0.5 mV/°C over –40 to +85 °C. | Use Scenario: Protecting 3.3 V microcontroller GPIO pins from ESD transients and supply rail overshoot. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that activates below 2.7 V to divert surge current away from sensitive inputs. Use Value: Limits clamped voltage to ≤2.7 V with <10 ns response, preventing latch-up and gate oxide damage. |
| Current-Source Bias Generator | Temperature-Compensated Oscillator Trim |
Use Scenario: Generating stable bias current for discrete transistor amplifiers using constant-current sink topology. IC Role / Device Role / Timing Role: Zener-regulated voltage applied across emitter resistor to set collector current. Use Value: Achieves <±2% current stability over –25 to +70 °C due to matched tempco with silicon resistors. | Use Scenario: Fine-tuning crystal oscillator frequency in telecom timing modules via varactor bias adjustment. IC Role / Device Role / Timing Role: Low-noise, low-capacitance voltage reference for tuning diode DC bias network. Use Value: Reduces phase noise contribution to <–165 dBc/Hz at 10 kHz offset by minimizing reference-induced jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5222B-1 | Same 2.5 V/5% spec, but in axial DO-35 (DO-204AH) package - no surface-mount capability. | Requires through-hole PCB layout and wave-solder process; unsuitable for high-density SMT designs. | Select 1N5222B-1 only when legacy through-hole assembly or manual prototyping is required. |
| BZX55C2V4 | 2.4 V nominal, ±5%, 500 mW, DO-35 - differs by 0.1 V and lacks radiation hardness or MIL-PRF-19500 screening options. | Not qualified for aerospace or high-reliability industrial use; limited to commercial-grade consumer electronics. | Choose BZX55C2V4 for cost-sensitive, non-critical applications where 0.1 V offset and absence of radiation specs are acceptable. |
Compared with 1N5222B-1 and BZX55C2V4, the 1N5222BUR-1 uniquely combines SMT compatibility, hermetic MELF packaging, radiation hardness, and MIL-PRF-19500 upscreening readiness - making it the only option for high-integrity, space-constrained, and environmentally demanding designs.
Availability
1N5222BUR-1 is available at Aetrix Electronics and suitable for low-power voltage reference, overvoltage protection, and analog biasing applications requiring stable component supply, long-term parametric consistency, and traceable sourcing for industrial control, medical instrumentation, and defense electronics.
Supply support for 1N5222BUR-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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and high-performance analog and mixed-signal components.
The 1N5222BUR-1 belongs to Microsemi's legacy 1N52xxBUR-1 Zener series, engineered for applications demanding hermetic sealing, wide temperature operation, and qualification to military standards - particularly in aerospace, defense, and critical infrastructure systems.
FAQ
What is the Zener voltage tolerance of the 1N5222BUR-1?
The 1N5222BUR-1 has a nominal Zener voltage of 2.5 V with a guaranteed tolerance of ±5% at 20 mA test current, as defined by the "B" suffix in its part number nomenclature per Microsemi's documentation.
Does the 1N5222BUR-1 support automated SMT assembly?
Yes, the 1N5222BUR-1 uses the DO-213AA (SOD-80/MELF) surface-mount package and is compatible with standard EIA-481-B tape-and-reel feeding. Its metallurgically bonded glass body withstands 260 °C solder reflow for 10 seconds per specification.
What is the maximum reverse leakage current for the 1N5222BUR-1?
The 1N5222BUR-1 specifies a maximum reverse leakage current of 100 µA at VR = 0.95 V, measured at 25 °C. This low leakage supports stable regulation in high-impedance reference circuits and minimizes standby power loss.
Is the 1N5222BUR-1 suitable for high-temperature environments?
Yes, the 1N5222BUR-1 is rated for junction temperatures from –65 °C to +175 °C and features a thermal resistance of 250 °C/W on FR4 board. Derating is required above 50 °C ambient or 125 °C end-cap temperature to maintain 0.5 W dissipation.
Does the 1N5222BUR-1 have radiation hardness certification?
Yes, the 1N5222BUR-1 is inherently radiation hard per Microsemi MicroNote 050, with documented performance retention after total ionizing dose exposure ≥100 krad(Si), supporting use in space and nuclear instrumentation applications.
1N5222BUR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-213AA
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 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
1N5222BUR-1 FAQ
1.How can I place an order for 1N5222BUR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5222BUR-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 1N5222BUR-1 reliable?
The price and inventory of 1N5222BUR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5222BUR-1 is usually 5 days.
3.What payment methods are accepted for 1N5222BUR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5222BUR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5222BUR-1?
1N5222BUR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5222BUR-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 1N5222BUR-1?
For technical support, including 1N5222BUR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5222BUR-1 requirements.
6.How does Aetrix verify that 1N5222BUR-1 is sourced from the original manufacturer or authorized distributors?
All 1N5222BUR-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 1N5222BUR-1 meets industry standards.
7.What is the process for return or replacement of 1N5222BUR-1?
All 1N5222BUR-1 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5222BUR-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 1N5222BUR-1 part is unused and in its original packaging.
Return procedure for 1N5222BUR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5222BUR-1 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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