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Microchip Technology 1N5361/TR12
- Part No.:
- 1N5361/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5361/TR12.pdf
- Description:
- DIODE ZENER 27V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,641
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Product details
Overview
1N5361/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal Zener voltage of 27 V, ±5% tolerance (B suffix), 50 mA test current, 5 Ω dynamic impedance at IZT, and maximum Zener current of 120 mA when adequately heat-sunk. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N5361/TR12 datasheet, 1N5361/TR12 pinout, 1N5361/TR12 application, or 1N5361/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (176 A), voltage regulation (ΔVZ = 0.60 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage under varying load and line conditions. Its low dynamic impedance (5 Ω) and tight voltage regulation (0.60 V between 10% and 50% of IZM) ensure minimal output variation across operating current.
Designed for axial-lead through-hole mounting, it features a void-free thermosetting epoxy case (UL94V-0), tin-lead or matte-tin plating, and moisture sensitivity level 1-no dry pack required. Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% - precise DC reference voltage at 50 mA test current |
| Power Dissipation | 5.0 W at 25 °C lead temperature - supports high-current regulation with proper heatsinking |
| Dynamic Impedance (ZZ) | 5.0 Ω at IZT = 50 mA - ensures low AC ripple transmission in feedback paths |
| Max Zener Current (IZM) | 120 mA - defines safe continuous reverse conduction limit with adequate thermal management |
| Voltage Regulation (ΔVZ) | 0.60 V - difference between VZ measured at 12 mA and 60 mA, indicating stability over operating range |
| Surge Current (IZSM) | 176 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables thermal design using standard lead-mounting practices |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, cathode indicated by color band. Leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; current flows into cathode during regulation |
| Cathode | Regulated output terminal | Banded end; supplies stable 27 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Guarantees mechanical and electrical interchangeability per industry-standard DO-201AD outline |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in precision reference designs versus ±10% or ±20% variants |
| Low dynamic impedance (5 Ω) | Minimizes output voltage deviation under dynamic load changes in feedback loops |
| Moisture Sensitivity Level 1 | Eliminates baking requirement prior to PCB assembly-reduces manufacturing cost and risk |
| RoHS-compliant e3 marking option | Enables compliance with environmental directives without performance trade-offs |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifiers. IC Role / Device Role / Timing Role: Provides fixed 27 V reference point for comparator or op-amp input. Use Value: Enables accurate output regulation within ±5% across temperature and load, leveraging 5 Ω ZZ and 0.60 V ΔVZ. | Use Scenario: Clamping transient surges on DC bus lines in motor drives or telecom power systems. IC Role / Device Role / Timing Role: Shunts excess energy to ground when bus voltage exceeds 27 V. Use Value: Survives 176 A surge (8.3 ms) without degradation, protecting downstream MOSFETs and controllers. |
| Industrial Sensor Excitation | Calibration Standard Circuit |
Use Scenario: Supplying stable excitation voltage to resistive bridge sensors in harsh environments. IC Role / Device Role / Timing Role: Acts as two-terminal shunt regulator delivering constant 27 V to sensor elements. Use Value: Maintains excitation accuracy over –65 °C to +150 °C due to low thermal coefficient and robust package. | Use Scenario: Serving as traceable voltage reference in portable field calibration tools. IC Role / Device Role / Timing Role: Provides primary 27 V reference against which DMMs or ADCs are adjusted. Use Value: ±5% tolerance and 0.60 V regulation spec support repeatable, field-deployable calibration workflows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5361B | No TR12 tape-and-reel packaging; bulk or ammo pack only | Lacks automated SMT placement compatibility; suited for manual or wave-solder assembly | Select when reel packaging is unnecessary and cost-per-unit is prioritized over placement efficiency |
| MMSZ5259BT1G | Surface-mount SOD-123 package, 500 mW rating, 27 V ±5%, 100 Ω ZZ | Lower power and higher impedance limit use to low-current references or signal-level clamping | Select for space-constrained PCBs where 5 W dissipation is not required and thermal mass is limited |
Compared with 1N5361/TR12, 1N5361B offers identical electrical specs but lacks tape-and-reel convenience for high-volume pick-and-place, while MMSZ5259BT1G trades power handling and impedance performance for miniaturization-making it suitable only for sub-100 mA applications.
Availability
1N5361/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, sensor excitation modules, and calibration equipment requiring stable component supply with full traceability and long-term continuity.
Supply support for 1N5361/TR12 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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in demanding environments-emphasizing thermal robustness, surge resilience, and JEDEC-standardized mechanical compatibility.
FAQ
What is the Zener voltage tolerance of the 1N5361/TR12?
The 1N5361/TR12 has a ±5% Zener voltage tolerance, confirmed by its "B" suffix per Microsemi's documentation. This means its nominal 27 V rating falls within 25.65 V to 28.35 V at 50 mA test current and 25 °C lead temperature. The tolerance is guaranteed across the full operating temperature range of –65 °C to +150 °C, making the 1N5361/TR12 suitable for applications requiring moderate precision without active trimming.
Does the 1N5361/TR12 require dry packing before PCB assembly?
No, the 1N5361/TR12 does not require dry packing. It carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification, meaning it is non-hygroscopic and can be stored and assembled without baking or humidity-controlled handling. This simplifies manufacturing logistics and eliminates moisture-related popcorning risks during reflow or wave soldering-critical for high-reliability industrial production of assemblies containing the 1N5361/TR12.
What is the maximum surge current rating for the 1N5361/TR12?
The 1N5361/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 176 A, defined as the peak value of an 8.3 ms half-sine waveform. This specification reflects its ability to absorb transient energy without parametric shift or catastrophic failure. Engineers designing surge protection circuits must ensure external series impedance limits peak current to ≤176 A during fault events to preserve long-term reliability of the 1N5361/TR12.
How is polarity marked on the 1N5361/TR12?
The 1N5361/TR12 uses a cathode band-typically a single colored stripe near one end of the axial body-to indicate polarity. The banded end is the cathode and must be held at a higher potential than the anode (unbanded end) for proper Zener operation. Reversing polarity subjects the device to forward conduction (VF ≤ 1.2 V @ 1 A), which does not regulate and may cause overheating if sustained beyond brief transients. Correct orientation is essential for all applications using the 1N5361/TR12.
What does the "TR12" suffix mean in 1N5361/TR12?
The "TR12" suffix in 1N5361/TR12 indicates EIA-296 standard tape-and-reel packaging: 12 mm tape width, 12 mm pocket pitch, and 1,000 units per reel. This format enables automated surface-mount placement despite the device's axial-leaded T-18 package-achieved via carrier tape with embossed pockets and cover tape. The TR12 configuration supports high-throughput manufacturing and is fully compatible with standard pick-and-place equipment used for the 1N5361/TR12.
1N5361/TR12 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
1N5361/TR12 FAQ
1.How can I place an order for 1N5361/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5361/TR12 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 1N5361/TR12 reliable?
The price and inventory of 1N5361/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5361/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5361/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5361/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5361/TR12?
1N5361/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5361/TR12 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 1N5361/TR12?
For technical support, including 1N5361/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5361/TR12 requirements.
6.How does Aetrix verify that 1N5361/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5361/TR12 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 1N5361/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5361/TR12?
All 1N5361/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5361/TR12, 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 1N5361/TR12 part is unused and in its original packaging.
Return procedure for 1N5361/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5361/TR12 Tags
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