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Microchip Technology 1N5361E3/TR8
- Part No.:
- 1N5361E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5361E3/TR8.pdf
- Description:
- DIODE ZENER 27V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,585
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Product details
Overview
1N5361E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal zener voltage of 27 V, ±5% tolerance (B-suffix equivalent), 50 mA test current, 5 Ω maximum dynamic impedance at IZT, and 120 mA maximum zener current (IZM) when adequately heat sunk. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and precision reference applications across industrial and telecom systems.
For engineers reviewing the 1N5361E3/TR8 datasheet, 1N5361E3/TR8 pinout, 1N5361E3/TR8 application, or 1N5361E3/TR8 equivalent, key selection criteria include its 27 V regulation point, 5 W steady-state power rating at TL < 25°C, 25 °C/W junction-to-lead thermal resistance, RoHS-compliant matte-tin plating, and T-18 axial package compatibility with manual or wave soldering per MIL-STD-750.
Technical Context
This device operates as a voltage reference by maintaining a stable reverse-biased breakdown voltage across a broad current range (10–120 mA). Its low dynamic impedance (5 Ω max at 50 mA) ensures minimal voltage variation under load changes, while its 25 °C/W thermal resistance enables reliable operation up to 150°C junction temperature with proper lead-length heat sinking.
The 1N5361E3/TR8 features a void-free UL94V-0 epoxy case, cathode band polarity marking, and moisture sensitivity level 1 per J-STD-020B-eliminating dry-pack requirements. It withstands 8.3 ms non-repetitive surge currents up to 176 A and exhibits ≤0.60 V voltage regulation (ΔVZ) between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, ±5% tolerance - defines precise regulation point for feedback or clamping |
| Test Current (IZT) | 50 mA - operating point at which VZ and ZZ are specified; sets minimum stable bias current |
| Dynamic Impedance (ZZ) | 5 Ω max at IZT - determines output voltage stability under varying load current |
| Max Zener Current (IZM) | 120 mA - maximum continuous DC current before thermal runaway with adequate heat sinking |
| Power Dissipation | 5.0 W at TL < 25°C (3/8″ lead length) - defines thermal design boundary for PCB layout |
| Thermal Resistance | 25 °C/W junction-to-lead - enables direct thermal path modeling from die to heatsink via leads |
| Voltage Regulation (ΔVZ) | 0.60 V max - difference between VZ measured at 12 mA and 60 mA, indicating line regulation performance |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; cathode indicated by single black band; RoHS-compliant matte-tin plated leads; weight 0.7 g; moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower potential side in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to voltage source input; delivers stable 27 V to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, electrical behavior, and replacement interoperability across suppliers |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating-compatible with lead-free reflow and wave soldering |
| Low ΔVZ (0.60 V) | Minimizes output voltage drift across 10–60 mA operating range-critical for stable feedback in SMPS controllers |
| High surge current rating (176 A) | Withstands 8.3 ms half-sine transients-enables robust overvoltage clamping in telecom line interfaces |
| Level 1 moisture sensitivity | Eliminates baking preconditioning prior to assembly-reduces manufacturing cost and handling risk |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role / Timing Role: Zener reference providing stable 27 V threshold to TL431 shunt regulator or optocoupler LED drive circuit. Use Value: Tight 5% tolerance and low 5 Ω dynamic impedance ensure ±1% output regulation accuracy despite line/load variations. |
Use Scenario: Protecting 24 V DC control inputs from transient surges in factory automation PLC modules. IC Role / Device Role / Timing Role: Shunt clamp absorbing energy from induced spikes on field wiring before reaching sensitive logic inputs. Use Value: 176 A peak surge rating and 0.60 V ΔVZ enable reliable clamping without degradation during repeated 1 kV/μs transients. |
| Telecom Line Interface Protection | Reference Voltage Generator |
Use Scenario: Safeguarding Ethernet PHY interface pins against ESD and lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Primary shunt element in multi-stage protection circuit, placed upstream of TVS diodes and series impedance. Use Value: Nonsensitive to ESD per MIL-STD-750 Method 1020 and high IZSM allow integration without additional pre-stress screening. |
Use Scenario: Generating stable 27 V reference for analog front-end calibration in test equipment power supplies. IC Role / Device Role / Timing Role: Precision voltage reference source for DAC/ADC bias networks and op-amp gain-setting resistors. Use Value: Low 25 °C/W thermal resistance and ±5% tolerance support long-term drift < 0.01%/°C in thermally managed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5361B | Same 27 V, ±5%, 5 W rating but with SnPb plating and no e3 RoHS designation | Not suitable for lead-free assembly; requires dry pack if stored >12 months | Select only for legacy SnPb processes where RoHS compliance is not mandated |
| MMSZ5258ET1G | Surface-mount SOD-123 package; 27 V, ±5%, 500 mW - 10× lower power rating | Limited to low-current references (<10 mA); unsuitable for high-IZM clamping or power supply feedback | Choose only for space-constrained PCBs where thermal mass and surge capability are secondary to footprint |
Compared with 1N5361B and MMSZ5258ET1G, the 1N5361E3/TR8 uniquely combines RoHS compliance, 5 W power handling, axial T-18 form factor for manual repair and high-surge resilience-making it optimal for industrial power and protection designs requiring field serviceability and transient robustness.
Availability
1N5361E3/TR8 is available at Aetrix Electronics and suitable for industrial power supply feedback, telecom surge protection, and precision reference voltage generation requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for 1N5361E3/TR8 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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge immunity, and JEDEC-standardized interchangeability across military and commercial applications.
FAQ
What is the zener voltage tolerance of the 1N5361E3/TR8?
The 1N5361E3/TR8 has a nominal zener voltage of 27 V with ±5% tolerance, consistent with the B-suffix variant in the 1N5333B–1N5388B family. This tolerance is confirmed in the Electrical Characteristics table on page 1 of the Microsemi datasheet, where 1N5361B (identical electrical spec) is listed with VZ = 27 V and "B" suffix denoting ±5%. The e3 suffix indicates RoHS compliance only and does not affect tolerance.
Can the 1N5361E3/TR8 be used in surface-mount designs?
No-the 1N5361E3/TR8 uses a T-18 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5361B (DO-214AA) and SMBG5361B (DO-214AB), both rated for 5 W and sharing identical 27 V ±5% regulation. These require separate land patterns and reflow profiles distinct from the through-hole 1N5361E3/TR8.
What is the maximum surge current rating for the 1N5361E3/TR8?
The 1N5361E3/TR8 has a maximum non-repetitive surge current (IZSM) of 176 A, specified for an 8.3 ms half-sine waveform. This value is explicitly listed in the Electrical Characteristics table under "MAXIMUM SURGE CURRENT (IZSM)" for type number 1N5361B, which shares identical ratings with the e3 variant. Surge testing follows JEDEC standards and supports use in transient voltage suppression applications.
How does the thermal resistance of the 1N5361E3/TR8 impact PCB layout?
The 1N5361E3/TR8 has a junction-to-lead thermal resistance of 25 °C/W when mounted with 3/8″ (10 mm) lead length from the body. This means each watt dissipated raises junction temperature 25°C above lead temperature. To maintain TJ ≤ 150°C at full 5 W, leads must be attached to copper pours or heatsinks holding TL ≤ 25°C-or derated per Figure 1's power vs. temperature curve.
Is the 1N5361E3/TR8 suitable for precision reference applications?
Yes-the 1N5361E3/TR8 delivers 27 V regulation with 0.60 V voltage regulation (ΔVZ) and 5 Ω dynamic impedance, enabling stable reference performance in moderate-precision applications like SMPS feedback and industrial sensor biasing. However, for sub-0.1% accuracy or low-tempco requirements, dedicated reference ICs (e.g., REF5025) are preferred; the 1N5361E3/TR8 serves best where cost, ruggedness, and surge resilience outweigh ultra-high precision.
1N5361E3/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 19.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5361E3/TR8 FAQ
1.How can I place an order for 1N5361E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5361E3/TR8 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 1N5361E3/TR8 reliable?
The price and inventory of 1N5361E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5361E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5361E3/TR8?
1N5361E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5361E3/TR8 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 1N5361E3/TR8?
For technical support, including 1N5361E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361E3/TR8 requirements.
6.How does Aetrix verify that 1N5361E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5361E3/TR8 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 1N5361E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5361E3/TR8?
All 1N5361E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361E3/TR8, 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 1N5361E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5361E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5361E3/TR8 Tags
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