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Microchip Technology 1N5542BUR-1/TR
- Part No.:
- 1N5542BUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5542BUR-1/TR.pdf
- Description:
- DIODE ZENER 24V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:130
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Product details
Overview
1N5542BUR-1/TR from Microsemi is a 24.0 V, ±5% tolerance, 500 mW glass MELF (DO-213AA) Zener diode with metallurgical bond construction, rated for -65°C to +175°C operation and qualified to MIL-PRF-19500/437 JANTXV level. It delivers low dynamic impedance (16 Ω at 1 mA), minimal capacitance, and radiation-hardened performance in voltage regulation and reference applications.
For engineers reviewing the 1N5542BUR-1/TR datasheet, 1N5542BUR-1/TR pinout, 1N5542BUR-1/TR application, or 1N5542BUR-1/TR equivalent, key selection criteria include its hermetically sealed DO-213AA package, 24.0 V nominal Zener voltage at 1 mA test current, 16 Ω dynamic impedance, 0.01 µA reverse leakage at 19.2 V, and suitability for high-reliability aerospace, defense, and industrial power conditioning circuits.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across a wide current range (IZL = 20 mA to IZM = 30 mA), with regulation factor ∆VZ ≤ 0.30 V between IZT and IZL. Its DO-213AA MELF package enables high thermal reliability and low parasitic capacitance (typ. <1.5 pF at 0 V).
The device features internal metallurgical bonding for enhanced thermal stability and mechanical robustness, supports RoHS-compliant matte-tin plating (commercial grade only), and exhibits inherent radiation hardness per MicroNote 050 - critical for space-grade and mission-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.0 V at 1 mA test current - precise reference point for voltage clamping and regulation circuits. |
| Power Rating | 500 mW steady-state - supports continuous operation up to 30 mA at 24 V without derating below 50°C ambient. |
| Dynamic Impedance (ZZT) | 16 Ω at IZT = 1 mA - ensures tight voltage regulation under varying load conditions. |
| Reverse Leakage (IR) | 0.01 µA max at VR = 19.2 V - minimizes standby power loss in precision bias networks. |
| Operating Temperature | -65°C to +175°C - enables deployment in extreme environments including avionics and downhole instrumentation. |
| Package | DO-213AA (MELF/SOD80) - hermetically sealed glass surface-mount package with axial coefficient of expansion matched to FR4 PCBs. |
| Qualification | MIL-PRF-19500/437 JANTXV - certified for high-reliability military and aerospace applications with full traceability. |
Pinout & Package
DO-213AA (MELF) glass package with two end-cap terminals; cathode identified by black band. Device is bidirectional in mounting orientation but must be biased with banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener anode connection in reverse-bias configuration | Applied positive potential relative to anode to enable breakdown conduction and voltage regulation at 24.0 V. |
| Anode (unbanded end) | Zener cathode connection in reverse-bias configuration | Reference ground or lower-potential node; completes reverse-bias path for controlled Zener current flow. |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass MELF construction | Eliminates moisture ingress and long-term parameter drift - essential for 20+ year field life in sealed systems. |
| Metallurgical bond | Ensures stable thermal interface between silicon die and end caps - reduces thermal resistance and improves pulse power handling. |
| JANTXV qualification | Full MIL-PRF-19500/437 compliance with lot traceability, screening, and burn-in - required for flight-critical subsystems. |
| Low noise density | Typ. 0.30 µV/√Hz at 250 µA - supports ultra-low-noise analog references in precision instrumentation and ADC front-ends. |
| Radiation hardness | Documented TID tolerance per MicroNote 050 - validated for total ionizing dose >100 krad(Si) without parametric shift. |
Applications
| Avionics Power Conditioning | Satellite Voltage Reference |
|---|---|
Use Scenario: Regulating auxiliary 24 V bus in flight control computers under wide temperature and radiation exposure. IC Role / Device Role / Timing Role: Precision shunt regulator providing stable 24 V reference for DC-DC converter feedback loops. Use Value: Maintains ±0.30 V regulation over 20–30 mA load range and -55°C to +125°C, ensuring closed-loop stability despite EMI and TID stress. |
Use Scenario: Generating low-drift bias voltage for radiation-tolerant op-amps in star tracker electronics. IC Role / Device Role / Timing Role: Low-noise, radiation-hardened Zener reference replacing active references where simplicity and reliability are prioritized. Use Value: Delivers 0.30 µV/√Hz noise and <0.01 µA leakage at 19.2 V - enabling sub-µV offset stability in cryogenic sensor interfaces. |
| Downhole Oilfield Instrumentation | Military Radar Bias Supply |
Use Scenario: Stabilizing sensor excitation voltage in high-temperature logging tools operating at 175°C ambient. IC Role / Device Role / Timing Role: High-temperature Zener clamp protecting analog front-end inputs from transients during drilling vibration events. Use Value: Sustains 24.0 V regulation with 16 Ω dynamic impedance up to +175°C junction - eliminating need for active thermal compensation. |
Use Scenario: Providing regulated gate bias for GaN RF power amplifiers in phased-array radar transceivers. IC Role / Device Role / Timing Role: Fast-response shunt regulator absorbing switching-induced ripple on 24 V bias rail. Use Value: Achieves <1.5 pF capacitance and 100 ns recovery - minimizing RF coupling into sensitive LO paths while maintaining ±5% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5542B-1 | Axial DO-35 package; same electrical specs but non-surface-mount; no tape-and-reel option. | Requires through-hole assembly and manual rework; unsuitable for automated SMT lines. | Select when legacy board design mandates axial footprint or hand-soldering is acceptable. |
| SMF24A | Surface-mount SOD-123 package; 24 V, ±5%, 400 W peak power, but only commercial AEC-Q200 rating; no MIL qualification. | Lacks JANTXV screening, radiation hardness, and hermetic sealing - limited to automotive infotainment, not safety-critical systems. | Choose for cost-sensitive industrial controls where MIL spec and radiation tolerance are unnecessary. |
Compared with 1N5542B-1 and SMF24A, the 1N5542BUR-1/TR uniquely combines DO-213AA MELF reliability, JANTXV qualification, and radiation hardness - making it the sole choice for space-qualified and nuclear-hardened 24 V reference designs requiring zero field failures.
Availability
1N5542BUR-1/TR is available at Aetrix Electronics and suitable for avionics power conditioning, satellite voltage reference, and downhole oilfield instrumentation requiring stable component supply across extended product lifecycles and harsh environmental conditions.
Supply support for 1N5542BUR-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-hardened, and aerospace-grade components with deep heritage in defense and space electronics.
The 1N55xxBUR-1 series was designed specifically for military and space applications demanding hermetic sealing, extreme temperature operation, and full MIL-PRF-19500/437 qualification - targeting voltage reference and transient suppression roles in mission-critical hardware.
FAQ
What is the Zener voltage tolerance for 1N5542BUR-1/TR?
The 1N5542BUR-1/TR has a nominal Zener voltage of 24.0 V with ±5% tolerance, indicated by the "B" suffix in its nomenclature. This tolerance is guaranteed across the full operating temperature range (-65°C to +175°C) and applies to all six electrical parameters per MIL-PRF-19500/437 requirements.
Is 1N5542BUR-1/TR RoHS compliant?
The 1N5542BUR-1/TR is available in RoHS-compliant versions with matte-tin plating on the end caps, but only for commercial-grade units. JANTXV-qualified units retain tin-lead plating to meet MIL-STD-750 solderability requirements and are not RoHS compliant.
What does the "TR" suffix mean in 1N5542BUR-1/TR?
The "TR" suffix denotes tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape. This format supports automated SMT placement and is the default shipping configuration for volume orders of the 1N5542BUR-1/TR.
Can 1N5542BUR-1/TR replace 1N5542B-1 in existing designs?
No direct replacement: 1N5542BUR-1/TR uses DO-213AA MELF packaging while 1N5542B-1 uses axial DO-35. The footprint, thermal profile, and assembly process differ significantly. Redesign of pad layout and reflow profile is required to migrate from 1N5542B-1 to 1N5542BUR-1/TR.
What is the maximum reverse current specification for 1N5542BUR-1/TR?
The maximum reverse current (IR) for 1N5542BUR-1/TR is 0.01 µA at VR = 19.2 V (80% of nominal VZ), measured at 25°C. This ultra-low leakage supports high-impedance bias networks and precision reference circuits where current draw must remain below 10 nA.
1N5542BUR-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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 21.6 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
1N5542BUR-1/TR FAQ
1.How can I place an order for 1N5542BUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5542BUR-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 1N5542BUR-1/TR reliable?
The price and inventory of 1N5542BUR-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 1N5542BUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5542BUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5542BUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5542BUR-1/TR?
1N5542BUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5542BUR-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 1N5542BUR-1/TR?
For technical support, including 1N5542BUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5542BUR-1/TR requirements.
6.How does Aetrix verify that 1N5542BUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5542BUR-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 1N5542BUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5542BUR-1/TR?
All 1N5542BUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5542BUR-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 1N5542BUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5542BUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5542BUR-1/TR Tags
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