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Microchip Technology 1N5535CUR-1/TR
- Part No.:
- 1N5535CUR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5535CUR-1/TR.pdf
- Description:
- DIODE ZENER 15V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:97
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Product details
Overview
1N5535CUR-1/TR from Microsemi is a 15 V, ±5% tolerance, 500 mW glass MELF Zener diode in DO-213AA package, rated for junction temperatures from –65 °C to +175 °C and featuring 100 Ω dynamic impedance at 1 mA test current. It delivers stable voltage regulation in precision reference and overvoltage protection circuits across aerospace and industrial power supplies.
For engineers reviewing the 1N5535CUR-1/TR datasheet, 1N5535CUR-1/TR pinout, 1N5535CUR-1/TR application, or 1N5535CUR-1/TR equivalent, key selection criteria include its MIL-PRF-19500/437 JANTXV qualification, hermetically sealed construction, low noise density (0.2 µV/√Hz), and compatibility with automated SMT assembly using EIA-481-1-A 12 mm tape.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity and requires no external biasing circuitry. Its metallurgical bond construction ensures mechanical robustness under thermal cycling and radiation exposure per MicroNote 050, while the DO-213AA glass MELF package provides hermetic sealing and minimal parasitic capacitance (typ. <1.5 pF at 0 V).
The device exhibits a regulation factor (∆VZ) of 0.2 V between IZT = 1 mA and IZL = 20 mA, and maintains stable VZ = 15.0 V ±5% across –65 °C to +175 °C, supported by RθJA = 300 °C/W on FR4 with 1 oz Cu.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.0 V ±5% at IZT = 1 mA - defines nominal regulation point with tight tolerance for precision references |
| Power Rating (PD) | 0.5 W - supports continuous operation up to 1 mA at full temperature range without derating below 50 °C ambient |
| Dynamic Impedance (ZZT) | 100 Ω at IZT = 1 mA - limits output voltage variation under load transients in feedback loops |
| Reverse Leakage (IR) | 0.01 µA at VR = 12.5 V - ensures negligible current draw in standby or high-impedance sensing nodes |
| Noise Density (ND) | 0.2 µV/√Hz - enables use in low-noise analog references and instrumentation front-ends |
| Junction Temp Range | –65 °C to +175 °C - qualifies for extended-range military, downhole, and engine-control applications |
| Package | DO-213AA (MELF) - hermetically sealed glass body with axial symmetry for uniform thermal expansion and reflow compatibility |
Pinout & Package
DO-213AA (MELF) glass surface-mount package with two end-cap terminals; cathode identified by black band. No discrete pins-device connects via metallized end caps soldered to PCB pads per recommended footprint (A = 5.08 mm, B = 1.40 mm, C = 2.03 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Regulated output node | Connected to higher-potential rail during Zener operation; defines polarity for voltage clamping |
| Anode (unbanded end) | Reference ground node | Typically tied to system ground or feedback node; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/437 JANTXV qualification | Validated reliability for aerospace and defense programs requiring screening to military standards |
| Internal metallurgical bond | Eliminates die attach voids and enhances thermal cycling endurance beyond standard epoxy-bonded Zeners |
| Hermetic glass MELF construction | Prevents moisture ingress and parameter drift over decades in harsh environments |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables handling without special grounding protocols during manual or automated assembly |
| Radiation-hardened per MicroNote 050 | Retains electrical parameters after total ionizing dose exposure up to 100 krad(Si) |
Applications
| Aerospace Power Reference | Industrial Sensor Excitation |
|---|---|
Use Scenario: Providing stable 15 V reference for ADC biasing and DAC output scaling in satellite telemetry modules. IC Role / Device Role / Timing Role: Precision voltage reference source for analog signal conditioning circuitry. Use Value: Maintains ±0.75 V regulation window over –55 °C to +125 °C, enabling accurate sensor data acquisition without calibration drift. | Use Scenario: Supplying excitation voltage to strain-gauge bridges in hydraulic pressure transducers operating in oil-field equipment. IC Role / Device Role / Timing Role: Low-noise, high-stability shunt regulator for bridge bias rails. Use Value: 0.2 µV/√Hz noise density prevents signal corruption in microvolt-level differential outputs. |
| Overvoltage Protection Clamp | Military Grade Voltage Monitor |
Use Scenario: Clamping transient surges on 12 V vehicle control bus lines in armored vehicle ECUs. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting voltage to ≤15.75 V during load-dump events. Use Value: Withstands 0.5 W surge dissipation and recovers regulation within microseconds due to low ZZT and thermal mass. | Use Scenario: Monitoring 15 V supply integrity in JANTXV-qualified flight computer power sequencers. IC Role / Device Role / Timing Role: Qualified voltage threshold detector in redundant supervision circuitry. Use Value: Guaranteed ±5% tolerance and –65 °C to +175 °C operation ensure deterministic trip points across mission-critical thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5535B-1 | Same 15 V ±5%, but in DO-35 axial package; no TR tape option; lacks JANTXV qualification | Suitable for prototyping or through-hole boards; not qualified for flight hardware | Select when board space allows axial leads and military screening is unnecessary |
| SMF15A | 15 V TVS diode (not Zener); 600 W peak pulse power; ±10% tolerance; 100 ns response; SOD-123 package | Designed for transient suppression, not precision regulation; higher leakage and noise | Choose only for surge protection-not for reference or biasing functions |
Compared with 1N5535CUR-1/TR, the 1N5535B-1 offers identical electrical specs in a legacy axial format but omits hermetic sealing and military qualification, while SMF15A serves a fundamentally different purpose-transient clamping-not stable DC regulation-making it unsuitable as a functional substitute.
Availability
1N5535CUR-1/TR is available at Aetrix Electronics and suitable for aerospace power reference, industrial sensor excitation, overvoltage protection clamp, and military grade voltage monitor applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for 1N5535CUR-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) designs high-reliability semiconductors for aerospace, defense, and industrial markets, emphasizing radiation hardness, extended temperature operation, and military qualification.
The 1N55xxBUR-1 series was developed to deliver MIL-PRF-19500/437-qualified Zener regulation in hermetically sealed MELF packages for mission-critical voltage reference and protection roles where commercial-grade devices cannot meet lifetime or environmental requirements.
FAQ
What is the Zener voltage tolerance of the 1N5535CUR-1/TR?
The 1N5535CUR-1/TR has a nominal Zener voltage of 15.0 V with a guaranteed tolerance of ±5%, indicated by the "C" suffix in its nomenclature. This tolerance applies across the full operating temperature range of –65 °C to +175 °C and is validated per MIL-PRF-19500/437 for JANTXV-grade units. The 1N5535CUR-1/TR achieves this stability via internal metallurgical bonding and hermetic glass packaging.
Is the 1N5535CUR-1/TR RoHS compliant?
The 1N5535CUR-1/TR is not RoHS compliant, as confirmed by its part number suffix "UR-1" without an "e3" designation. RoHS-compliant versions are available only in commercial-grade variants (e.g., 1N5535CUR-1/TR e3), which lack JAN/JANTX/JANTXV qualification. The 1N5535CUR-1/TR uses tin-lead plating on its end caps and meets MIL-STD-750 Method 2026 solderability requirements.
What is the maximum steady-state power dissipation for the 1N5535CUR-1/TR?
The 1N5535CUR-1/TR has a maximum steady-state power dissipation (PD) of 0.5 W at end cap temperature < 125 °C or ambient temperature < 50 °C on FR4 with 1 oz copper. Derating begins linearly above 50 °C ambient, reaching zero at +175 °C, per Figure 2 in the official datasheet. This rating assumes use of the recommended pad layout (A = 5.08 mm, B = 1.40 mm, C = 2.03 mm).
Does the 1N5535CUR-1/TR have a specified noise density?
Yes, the 1N5535CUR-1/TR has a maximum noise density (ND) of 0.2 µV/√Hz, measured at IZ = 250 µA in a 1 kHz–3 kHz bandpass filter at 25 °C ambient. This low noise performance is enabled by the device's metallurgically bonded die and glass MELF construction, making the 1N5535CUR-1/TR suitable for precision analog references where signal integrity is critical.
What does the "TR" suffix indicate in 1N5535CUR-1/TR?
The "TR" suffix in 1N5535CUR-1/TR indicates tape-and-reel packaging per EIA-481-1-A standard using 12 mm carrier tape. This format supports automated SMT placement and is the standard shipping configuration for volume orders. The base part 1N5535CUR-1 is identical electrically and mechanically-the "TR" denotes only the packaging method, not a functional variant of the 1N5535CUR-1/TR.
1N5535CUR-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):
- 15 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 13.5 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
1N5535CUR-1/TR FAQ
1.How can I place an order for 1N5535CUR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5535CUR-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 1N5535CUR-1/TR reliable?
The price and inventory of 1N5535CUR-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 1N5535CUR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N5535CUR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5535CUR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5535CUR-1/TR?
1N5535CUR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5535CUR-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 1N5535CUR-1/TR?
For technical support, including 1N5535CUR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5535CUR-1/TR requirements.
6.How does Aetrix verify that 1N5535CUR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N5535CUR-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 1N5535CUR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N5535CUR-1/TR?
All 1N5535CUR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5535CUR-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 1N5535CUR-1/TR part is unused and in its original packaging.
Return procedure for 1N5535CUR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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