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Microchip Technology 1N5362/TR12
- Part No.:
- 1N5362/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5362/TR12.pdf
- Description:
- DIODE ZENER 28V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,782
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Product details
Overview
1N5362/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 28 V, ±5% tolerance (B suffix), maximum dynamic impedance of 6.0 Ω at 50 mA test current, and maximum reverse current of 0.5 μA at 21.2 V. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5362/TR12 datasheet, 1N5362/TR12 pinout, 1N5362/TR12 application, or 1N5362/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (130 A), voltage regulation (ΔVZ = 3.9 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This discrete Zener diode functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output voltage across wide operating current (50 mA IZT to 130 mA IZM) and temperature ranges. Its low dynamic impedance (6.0 Ω) and tight voltage regulation (3.9 V ΔVZ) ensure minimal deviation under load transients.
The device uses a void-free thermosetting epoxy T-18 package with tin-lead or matte-tin plating, cathode indicated by band, and meets MIL-STD-750 Method 1020 for ESD insensitivity. Thermal resistance is specified at 25 °C/W junction-to-lead (3/8″ lead length) and 85 °C/W junction-to-ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28 V ±5% - precise regulation point for feedback networks requiring stable reference under varying load |
| Power Dissipation | 5.0 W at 25°C lead temperature - supports high-current regulation when heat-sunk per JEDEC T-18 mounting rules |
| Test Current (IZT) | 50 mA - standardized bias point for measuring VZ and dynamic impedance |
| Dynamic Impedance (ZZ) | 6.0 Ω max at 50 mA - ensures low AC impedance for ripple suppression in regulated supplies |
| Max Reverse Current (IR) | 0.5 μA at 21.2 V - guarantees minimal leakage in high-impedance sensing or standby circuits |
| Voltage Regulation (ΔVZ) | 3.9 V - difference between VZ measured at 10% and 50% of IZM, defining regulation linearity |
| Surge Current (IZSM) | 130 A (8.3 ms half-sine) - withstands transient overvoltage events without degradation |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, cathode identified by color band, leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias regulation | Connected to circuit ground or lower-potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-voltage side in reverse-biased operation | Marked with band; connected to unregulated input rail to clamp voltage at 28 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures industry-standard mechanical and electrical interchangeability across manufacturers |
| Moisture sensitivity Level 1 | No dry pack required prior to PCB assembly - simplifies handling and reduces BOM prep time |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual assembly or rework |
| RoHS-compliant e3 marking option | Meets EU Directive 2011/65/EU without compromising electrical performance or reliability |
| High surge current capability | 130 A peak (8.3 ms) enables use in transient voltage suppression without external TVS stacking |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 28 V threshold to control PWM duty cycle. Use Value: Maintains ±1% output regulation across line/load/temperature due to low ΔVZ (3.9 V) and tight ±5% VZ tolerance. | Use Scenario: Supplies precision bias voltage to bridge-based pressure or temperature transducers in factory automation systems. IC Role / Device Role / Timing Role: Stable excitation source replacing active references where ultra-low drift is not required. Use Value: Delivers 28 V reference with <0.5 μA leakage at 21.2 V, minimizing sensor offset error in high-impedance signal chains. |
| Overvoltage Protection Clamp | DC Link Voltage Monitor |
Use Scenario: Clamps transient spikes on 24 V DC bus in motor drive control modules during MOSFET switching transitions. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy above 28 V threshold before downstream ICs are damaged. Use Value: Withstands 130 A surge (8.3 ms) without failure, enabling robust protection without complex active circuitry. | Use Scenario: Provides scaled-down voltage representation of 300–400 V DC link to microcontroller ADC input via resistive divider. IC Role / Device Role / Timing Role: Zener-stabilized reference node ensuring consistent divider ratio under varying bus conditions. Use Value: Low dynamic impedance (6.0 Ω) prevents loading-induced gain error in high-resistance dividers used for isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5362B | Same 28 V ±5%, 5 W rating, but in bulk packaging (no TR12 tape-and-reel) | Not suitable for automated SMT placement; requires manual or vibration-feed insertion | Select 1N5362/TR12 for pick-and-place production; choose 1N5362B for prototyping or low-volume hand assembly |
| MMSZ5261B-TP | Surface-mount SOD-123 package, same 28 V ±5%, but rated 500 mW (not 5 W); higher ZZ (30 Ω) | Limited to low-power signal-level regulation; cannot replace 1N5362/TR12 in power supply feedback or clamping | Use MMSZ5261B-TP only in space-constrained, low-current applications where thermal mass is insufficient for axial-leaded part |
Compared with 1N5362B and MMSZ5261B-TP, the 1N5362/TR12 uniquely combines 5 W power handling, axial-leaded mechanical robustness, tape-and-reel automation readiness, and 25 °C/W thermal resistance-making it optimal for industrial power conversion and protection where sustained dissipation and manufacturability are critical.
Availability
1N5362/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and DC link monitoring systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5362/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standardized form factor for drop-in replacement across legacy designs.
FAQ
What is the Zener voltage tolerance of the 1N5362/TR12?
The 1N5362/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its full designation. This means its nominal 28 V regulation point falls within 26.6 V to 29.4 V at 50 mA test current and 25°C lead temperature, as confirmed in Microsemi's official 1N5333B–1N5388B datasheet Rev D.
Does the 1N5362/TR12 require dry packing before PCB assembly?
No, the 1N5362/TR12 does not require dry packing. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored and assembled without baking or humidity-controlled environments-a direct benefit of its void-free epoxy T-18 encapsulation.
What is the maximum surge current rating for the 1N5362/TR12?
The 1N5362/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 130 A, defined as the peak of an 8.3 ms half-sine waveform. This value is specified in the Electrical Characteristics table of the Microsemi datasheet and reflects its capability to absorb transient energy without parametric shift or failure.
Can the 1N5362/TR12 be used as a direct replacement for the 1N5362B?
Yes, the 1N5362/TR12 is electrically and mechanically identical to the 1N5362B, differing only in packaging: TR12 denotes tape-and-reel (EIA-296 standard) for automated placement, while 1N5362B is supplied in bulk. Both share identical Zener voltage, power rating, thermal resistance, and marking.
What is the thermal resistance junction-to-lead for the 1N5362/TR12?
The thermal resistance junction-to-lead (RθJL) for the 1N5362/TR12 is 25 °C/W, measured at 3/8″ (10 mm) lead length from the body. This value enables accurate thermal design when mounting on heatsinks or chassis, and is documented in the Maximum Ratings section of the Microsemi datasheet.
1N5362/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):
- 28 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 20.1 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
1N5362/TR12 FAQ
1.How can I place an order for 1N5362/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5362/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 1N5362/TR12 reliable?
The price and inventory of 1N5362/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5362/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5362/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5362/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5362/TR12?
1N5362/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5362/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 1N5362/TR12?
For technical support, including 1N5362/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5362/TR12 requirements.
6.How does Aetrix verify that 1N5362/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5362/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 1N5362/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5362/TR12?
All 1N5362/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5362/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 1N5362/TR12 part is unused and in its original packaging.
Return procedure for 1N5362/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5362/TR12 Tags
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