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Microchip Technology 1N5997UR/TR
- Part No.:
- 1N5997UR/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N5997UR/TR.pdf
- Description:
- DIODE ZENER 7.5V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,364
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Product details
Overview
1N5997UR/TR from Microsemi is a surface-mount 7.5 V, 5% tolerance Zener diode in DO-213AA (MLL34/SOD80) MELF package, rated for 500 mW power dissipation at 25°C, with 7.0 mA test current, 600 Ω dynamic impedance, and ±0.051%/°C temperature coefficient - used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N5997UR/TR datasheet, 1N5997UR/TR pinout, 1N5997UR/TR application, or 1N5997UR/TR equivalent, this page delivers verified electrical parameters, package dimensions, thermal derating behavior, RoHS compliance status, and direct alternatives for commercial-grade Zener regulation where stable 7.5 V reference and low leakage (<0.5 µA @ 6.0 V) are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 7.5 V reference across a wide current range (0.25 mA to 6.0 mA), with low dynamic impedance (600 Ω @ 7.0 mA) ensuring minimal output variation under load transients. Its DO-213AA glass MELF package provides hermetic sealing and high reliability, supporting operation from –65°C to +175°C junction temperature.
The device exhibits a positive temperature coefficient of +0.051%/°C, indicating increasing Zener voltage with rising temperature - critical for thermal drift compensation in precision references. It is non-sensitive to ESD per MIL-STD-750 Method 1020 and inherently radiation-hardened per MicroNote 050.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5 V @ 7.0 mA - precise regulation point for low-voltage reference design |
| Power Dissipation (PD) | 0.5 W at 25°C ambient - defines maximum continuous power before thermal derating applies |
| Zener Impedance (ZZT) | 600 Ω @ 7.0 mA - quantifies AC voltage variation under small-signal current modulation |
| Reverse Leakage (IR) | 0.5 µA @ 6.0 V - ensures minimal error current in high-impedance bias networks |
| Temp. Coefficient (αVZ) | +0.051 %/°C - enables predictable drift modeling in temperature-critical applications |
| Package | DO-213AA (SOD80/MLL34) - glass MELF surface-mount form factor with end-cap terminations |
| RoHS Compliance | e3 suffix indicates RoHS-compliant matte-tin plating (commercial grade only) |
Pinout & Package
DO-213AA (SOD80/MLL34) is a cylindrical glass MELF package with two metallized end caps serving as anode and cathode terminals. Cathode is marked by a single black band; device operates with banded end positive during Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; establishes polarity for reverse-biased Zener operation |
| Cathode (banded end) | Regulated output node | Provides stable 7.5 V relative to anode when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Enables long-term stability and moisture resistance in harsh environments |
| Low capacitance (typ. <2 pF) | Minimizes signal coupling and high-frequency loading in RF or fast-switching circuits |
| MIL-PRF-19500 screening option | Supports military-grade reliability requirements via prefix-modified part numbers |
| ESD immunity (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection in handling and assembly |
| Radiation hardness (MicroNote 050) | Validated performance in total ionizing dose (TID) environments up to 100 krad(Si) |
Applications
| Industrial Sensor Reference | Low-Power Voltage Clamp |
|---|---|
|
Use Scenario: Providing stable excitation voltage for bridge-based pressure sensors in factory automation systems operating from –40°C to +85°C. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, regulating sensor supply rail against input fluctuations. Use Value: 7.5 V nominal output with +0.051%/°C TC enables predictable calibration offset correction across temperature. |
Use Scenario: Clamping microcontroller I/O pins against transient overvoltage in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Shunt protection element limiting voltage to 7.5 V during ESD or surge events. Use Value: 0.5 µA leakage at 6.0 V prevents false triggering while 600 Ω ZZT ensures rapid clamping response. |
| Medical Instrument Bias Supply | Test Equipment Calibration Reference |
|
Use Scenario: Generating precision bias for op-amp input stages in portable ECG amplifiers requiring low-noise, low-drift references. IC Role / Device Role / Timing Role: Passive voltage reference establishing DC operating point for analog front-end circuitry. Use Value: Hermetic DO-213AA packaging ensures long-term parameter stability critical for medical-grade accuracy. |
Use Scenario: Serving as traceable 7.5 V reference in handheld multimeter calibration routines. IC Role / Device Role / Timing Role: Primary shunt reference standard for verifying DMM accuracy at mid-range voltage points. Use Value: 5% tolerance and 600 Ω ZZT support repeatable, low-hysteresis measurements under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX55C7V5 | Same 7.5 V, 5% tolerance, but DO-35 axial package; higher ZZT (700 Ω) and lower PD (500 mW same, but less efficient thermal dissipation) | Requires through-hole PCB layout; unsuitable for high-density SMT assemblies | Select when legacy axial footprint compatibility or manual prototyping is prioritized over board space efficiency |
| MMBZ5227BS | SOT-23 package; same 7.5 V, 5% tolerance; lower PD (225 mW); ZZT = 30 Ω @ 20 mA - optimized for low-impedance regulation at higher currents | Not suitable for low-current (<1 mA) reference use due to knee-region instability | Select when compact size and low dynamic impedance at >10 mA are required, and power budget permits derating |
Compared with BZX55C7V5 and MMBZ5227BS, the 1N5997UR/TR offers superior thermal performance in SMT layouts (RθJA = 300°C/W on FR4), tighter low-current regulation stability, and radiation-hardened qualification - making it preferred for industrial and medical SMT designs demanding long-term parametric consistency.
Availability
1N5997UR/TR is available at Aetrix Electronics and suitable for industrial sensor reference, low-power voltage clamp, and medical instrument bias supply applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant surface-mount packaging.
Supply support for 1N5997UR/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The 1N5997UR/TR belongs to Microsemi's legacy DO-213AA Zener diode family designed for precision voltage regulation in mission-critical SMT applications where hermetic sealing, temperature stability, and ESD immunity are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5997UR/TR?
The 1N5997UR/TR has a nominal Zener voltage of 7.5 V with a 5% tolerance, meaning its actual breakdown voltage falls between 7.125 V and 7.875 V when tested at 7.0 mA. This tolerance is indicated by the "B" suffix in the part nomenclature and is verified per JEDEC standards under specified thermal conditions.
Is the 1N5997UR/TR RoHS compliant?
Yes, the 1N5997UR/TR is RoHS compliant, as confirmed by the "e3" designation in its full part number. The device uses matte-tin plating on its end caps and meets EU Directive 2011/65/EU requirements - applicable only to commercial-grade versions, not military-screened variants.
What is the maximum reverse leakage current for the 1N5997UR/TR?
The 1N5997UR/TR specifies a maximum reverse leakage current (IR) of 0.5 µA at 6.0 V, measured at 30°C lead temperature. This low leakage supports high-impedance bias networks and minimizes error in precision reference applications where current draw must be tightly controlled.
Can the 1N5997UR/TR be used in high-temperature environments?
Yes, the 1N5997UR/TR is rated for junction and storage temperatures from –65°C to +175°C. Its DO-213AA glass package and internal metallurgical bonds ensure structural integrity and parametric stability across this full range, provided power dissipation is derated per Figure 1 in the datasheet.
What does the "TR" suffix mean in 1N5997UR/TR?
The "TR" suffix indicates tape-and-reel packaging per EIA-481-B standard using 12 mm carrier tape. This format supports automated SMT placement and is the standard shipping configuration for volume orders of the 1N5997UR/TR at Aetrix Electronics.
1N5997UR/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):
- 7.5 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- 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
1N5997UR/TR FAQ
1.How can I place an order for 1N5997UR/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5997UR/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 1N5997UR/TR reliable?
The price and inventory of 1N5997UR/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5997UR/TR is usually 5 days.
3.What payment methods are accepted for 1N5997UR/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5997UR/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5997UR/TR?
1N5997UR/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5997UR/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 1N5997UR/TR?
For technical support, including 1N5997UR/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5997UR/TR requirements.
6.How does Aetrix verify that 1N5997UR/TR is sourced from the original manufacturer or authorized distributors?
All 1N5997UR/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 1N5997UR/TR meets industry standards.
7.What is the process for return or replacement of 1N5997UR/TR?
All 1N5997UR/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5997UR/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 1N5997UR/TR part is unused and in its original packaging.
Return procedure for 1N5997UR/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5997UR/TR Tags
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