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Microchip Technology 1N4133UR-1/TR
- Part No.:
- 1N4133UR-1/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-213AA
- Datasheet:
-
1N4133UR-1/TR.pdf
- Description:
- DIODE ZENER 87V 500MW DO213AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,943
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Product details
Overview
1N4133UR-1/TR from Microsemi is a glass-encapsulated, surface-mount Zener diode in DO-213AA (SOD-80/MELF) package, rated for 0.5 W steady-state power dissipation, with nominal Zener voltage of 87 V ±5%, 250 mA test current, and 1000 Ω maximum Zener impedance at IZT. It operates across –65 °C to +175 °C and is used for precision voltage regulation in high-reliability industrial power supplies.
For engineers reviewing the 1N4133UR-1/TR datasheet, 1N4133UR-1/TR pinout, 1N4133UR-1/TR application, or 1N4133UR-1/TR equivalent, key selection factors include its hermetically sealed MELF construction, low noise density (1 µV/√Hz), tight thermal resistance (150 °C/W junction-to-end-cap), and RoHS-compliant e3 suffix option - all critical for aerospace-grade voltage reference and overvoltage protection circuits.
Technical Context
This device functions as a two-terminal, reverse-biased voltage regulator where the cathode band marks the positive terminal during Zener operation. Its regulation relies on controlled avalanche breakdown above 6 V, with temperature coefficient of +0.095 %/°C confirming positive drift behavior typical of higher-voltage Zeners.
The DO-213AA package enables stable thermal performance on FR4 PCBs with 1 oz copper, supporting 0.5 W dissipation only when end-cap temperature remains below 100 °C - requiring careful layout per recommended 5.08 mm × 1.40 mm pad footprint and 2.03 mm spacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 87 V ±5% at 250 mA test current - defines primary regulation setpoint under stable thermal conditions |
| Power Dissipation | 0.5 W at TEC < 100 °C - limits continuous operating current to ~5.7 mA at 87 V without derating |
| Zener Impedance | 1000 Ω max at 250 mA - indicates moderate dynamic resistance affecting regulation accuracy under load transients |
| Reverse Leakage | 10 nA max at 69.6 V - ensures minimal quiescent current in standby protection circuits |
| Noise Density | 1 µV/√Hz typical - supports low-noise reference applications where spectral purity matters |
| Temp Coefficient | +0.095 %/°C - quantifies voltage drift magnitude per degree Celsius rise in junction temperature |
| Forward Voltage | 1.1 V at 200 mA - defines conduction threshold when used in bidirectional clamp configurations |
Pinout & Package
DO-213AA (SOD-80/MELF) hermetically sealed glass package with axial symmetry; cathode identified by single black band - no discrete pins, terminals are metallized end caps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode End Cap | Positive terminal during Zener operation | Connected to regulated output node; must be held at higher potential than anode for breakdown conduction |
| Anode End Cap | Reference/ground terminal | Typically tied to system ground or lower-potential rail; completes current path through Zener junction |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass seal | Enables operation from –65 °C to +175 °C with zero moisture ingress risk in sealed enclosures |
| Internal metallurgical bond (-1 suffix) | Improves thermal cycling reliability and reduces interfacial resistance between die and end cap |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| RoHS-compliant plating | Tin finish meets JEDEC J-STD-020 reflow requirements and eliminates lead-based solder compatibility issues |
| Low capacitance | ~4.4 pF typical (per Figure 3) - minimizes high-frequency coupling in RF-adjacent bias networks |
Applications
| Industrial Power Supply Regulation | Aerospace Voltage Reference |
|---|---|
Use Scenario: Stabilizing auxiliary bias rails in 48 V telecom rectifiers where input ripple exceeds ±10%. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining fixed 87 V reference for error amplifier feedback. Use Value: Maintains ±0.5% output stability over –40 °C to +85 °C ambient due to predictable +0.095 %/°C TC and low thermal resistance. | Use Scenario: Providing primary voltage reference in radiation-hardened satellite telemetry conditioning modules. IC Role / Device Role / Timing Role: Precision Zener element in ratiometric ADC reference divider networks. Use Value: Inherent radiation hardness per MicroNote 050 allows operation in total ionizing dose (TID) environments up to 100 krad(Si) without parameter degradation. |
| Overvoltage Protection Clamp | High-Temperature Sensor Biasing |
Use Scenario: Clamping transient surges on 72 V battery management system (BMS) signal lines during load dump events. IC Role / Device Role / Timing Role: Passive crowbar element limiting voltage excursion to 87 V ±5% before downstream IC damage occurs. Use Value: Fast avalanche response (<10 ns) and 0.5 W pulse handling capability suppresses 100 V/µs transients without thermal runaway. | Use Scenario: Biasing platinum RTD bridges in downhole oil-well monitoring tools operating at 150 °C ambient. IC Role / Device Role / Timing Role: Stable excitation source delivering constant current through sensor bridge via series resistor. Use Value: Guaranteed functionality at +175 °C junction temperature enables uninterrupted operation where silicon regulators fail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4133UR-1 | Same electrical specs but includes internal metallurgical bond; no TR tape-and-reel packaging | Preferred for military/aerospace programs requiring JAN/JANTXV qualification and enhanced thermal cycling life | Select 1N4133UR-1/TR when automated SMT assembly and long-term supply continuity are required |
| BZX85C82 | 82 V nominal, ±5% tolerance, 1.3 W power rating, DO-41 package - higher power but larger footprint and plastic encapsulation | Suitable for commercial-grade power supplies where size and hermeticity are secondary to cost and availability | Choose BZX85C82 only if board space permits DO-41 and radiation/temperature specs are non-critical |
Compared with 1N4133UR-1/TR, the 1N4133UR-1 offers superior reliability in thermal cycling environments but lacks tape-and-reel delivery, while BZX85C82 trades hermetic sealing and MELF thermal performance for higher power and lower unit cost in less demanding applications.
Availability
1N4133UR-1/TR is available at Aetrix Electronics and suitable for industrial power supply regulation, aerospace voltage reference, overvoltage protection clamp, and high-temperature sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N4133UR-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 (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, emphasizing radiation hardness, extended temperature operation, and hermetic packaging.
The 1N4099UR–1N4135UR series was developed specifically for mission-critical voltage regulation where plastic-packaged Zeners fail - delivering stable 1.8–100 V references in hermetically sealed DO-213AA packages rated to +175 °C.
FAQ
What is the Zener voltage tolerance for 1N4133UR-1/TR?
The 1N4133UR-1/TR has a nominal Zener voltage of 87 V with a standard tolerance of ±5%, as defined in the Microsemi datasheet revision D. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current and is confirmed by electrical screening per JEDEC standards. No C (±2%) or D (±1%) suffix is present in the part number, so tighter tolerances do not apply to this specific variant.
Does 1N4133UR-1/TR require heatsinking in standard FR4 PCB layouts?
No external heatsink is required for 1N4133UR-1/TR when operated within its 0.5 W power limit and with end-cap temperature maintained below 100 °C. The device achieves 150 °C/W junction-to-end-cap thermal resistance using the recommended 5.08 mm × 1.40 mm copper pad footprint on 1 oz FR4. Derating begins above 25 °C ambient per Figure 2, making thermal layout - not heatsinking - the primary design factor.
Is 1N4133UR-1/TR compatible with lead-free reflow processes?
Yes, 1N4133UR-1/TR is RoHS-compliant (e3 suffix) and features annealed matte-tin plating qualified to MIL-STD-750 Method 2026. It withstands peak reflow temperatures of 260 °C for 10 seconds, meeting IPC-J-STD-020 requirements for lead-free assembly. The glass body remains unaffected by standard SAC305 thermal profiles.
What does the "-1" suffix signify in 1N4133UR-1/TR?
The "-1" suffix in 1N4133UR-1/TR denotes internal metallurgical bonding between the silicon die and end caps - a construction enhancement that improves thermal cycling endurance and reduces interfacial thermal resistance. This feature is documented in Microsemi's separate data sheet for the -1 series and is retained in the tape-and-reel packaged version.
Can 1N4133UR-1/TR be used in bidirectional TVS configurations?
No, 1N4133UR-1/TR is a unidirectional Zener diode optimized for reverse-bias regulation only. Its forward voltage is 1.1 V at 200 mA, but it lacks the symmetrical clamping characteristics, specified surge ratings, or standardized TVS waveforms (e.g., 8/20 µs) required for transient voltage suppression. For bidirectional protection, dedicated TVS arrays or back-to-back Zener pairs are necessary.
1N4133UR-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):
- 87 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 1000 Ohms
- Current - Reverse Leakage @ Vr:
- 10 nA @ 66.2 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
1N4133UR-1/TR FAQ
1.How can I place an order for 1N4133UR-1/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4133UR-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 1N4133UR-1/TR reliable?
The price and inventory of 1N4133UR-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 1N4133UR-1/TR is usually 5 days.
3.What payment methods are accepted for 1N4133UR-1/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4133UR-1/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4133UR-1/TR?
1N4133UR-1/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4133UR-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 1N4133UR-1/TR?
For technical support, including 1N4133UR-1/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4133UR-1/TR requirements.
6.How does Aetrix verify that 1N4133UR-1/TR is sourced from the original manufacturer or authorized distributors?
All 1N4133UR-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 1N4133UR-1/TR meets industry standards.
7.What is the process for return or replacement of 1N4133UR-1/TR?
All 1N4133UR-1/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4133UR-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 1N4133UR-1/TR part is unused and in its original packaging.
Return procedure for 1N4133UR-1/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4133UR-1/TR Tags
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