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Microchip Technology 1N5362A/TR8
- Part No.:
- 1N5362A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5362A/TR8.pdf
- Description:
- DIODE ZENER 28V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,207
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Product details
Overview
1N5362A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 28 V, ±10% tolerance (A suffix), 50 mA test current (IZT), 6.0 Ω dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 20.1 V (VR). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.
For engineers reviewing the 1N5362A/TR8 datasheet, 1N5362A/TR8 pinout, 1N5362A/TR8 application, or 1N5362A/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (130 A), voltage regulation (ΔVZ = 3.9 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This Zener diode delivers stable voltage regulation across wide operating current (10–130 A surge) and temperature ranges (–65 °C to +150 °C), enabled by low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length) and moisture-resistant Level 1 packaging per IPC/JEDEC J-STD-020B.
Its electrical behavior is defined by tight dynamic impedance (6.0 Ω at 50 mA), minimal voltage variation (ΔVZ = 3.9 V between 10% and 50% of IZM), and low leakage (0.5 μA at VR = 20.1 V), supporting reliable clamping and reference functions in unregulated DC rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28 V nominal, ±10% tolerance - defines regulated output level under specified test conditions |
| Test Current (IZT) | 50 mA - current at which VZ is measured; sets baseline operating point for regulation accuracy |
| Dynamic Impedance (ZZ) | 6.0 Ω - low AC resistance ensures minimal voltage shift with load current changes |
| Max Reverse Current (IR) | 0.5 μA at VR = 20.1 V - confirms high blocking integrity below breakdown threshold |
| Power Dissipation (Pd) | 5.0 W at TL = 25 °C (3/8″ lead length) - determines heatsinking requirement for continuous operation |
| Surge Current (IZSM) | 130 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Voltage Regulation (ΔVZ) | 3.9 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by band; leads plated with RoHS-compliant annealed matte tin per MIL-STD-750 Method 2026; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener mode | Must be held ≤ (VZ − 0.7 V) below cathode to avoid forward conduction during regulation |
| Cathode | Current exit terminal in forward bias; banded end, connected to higher-potential node in Zener mode | Applied positive voltage relative to anode to achieve reverse breakdown and regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized mechanical dimensions, marking, and reliability testing across suppliers |
| Level 1 moisture sensitivity | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling protocols during board assembly and test |
| High surge current capability | Withstands 130 A non-repetitive surges - suitable for input-stage transient suppression |
| RoHS-compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loop in 24 V DC-DC converter with variable load. IC Role / Device Role / Timing Role: Zener diode provides fixed 28 V reference to error amplifier input, enabling precise output voltage control. Use Value: Low ΔVZ (3.9 V) and 6.0 Ω ZZ ensure <±0.5% output drift across 10–100% load range. |
Use Scenario: Clamping transient spikes on 24 V rail caused by relay coil de-energization. IC Role / Device Role / Timing Role: Acts as shunt protector, conducting only when voltage exceeds 28 V ±10%, diverting surge energy to ground. Use Value: 130 A surge rating absorbs 8.3 ms half-sine transients without degradation or thermal runaway. |
| Programmable Logic Controller (PLC) Input Protection | Test Equipment Reference Source |
Use Scenario: Protecting 24 V digital input channel against field-wiring faults and induced surges. IC Role / Device Role / Timing Role: Placed across input terminals to clamp overvoltage before it reaches isolation barrier or MCU GPIO. Use Value: 0.5 μA IR at 20.1 V prevents false triggering while maintaining high-impedance input state during normal operation. |
Use Scenario: Providing stable 28 V reference for calibration circuitry in portable multimeter design. IC Role / Device Role / Timing Role: Serves as primary voltage standard in resistive divider network feeding ADC reference path. Use Value: ±10% VZ tolerance and low thermal resistance (25 °C/W) limit drift to <0.02%/°C over –20 °C to +70 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5362B/TR8 | ±5% VZ tolerance (vs. ±10% for 1N5362A/TR8); otherwise identical electrical specs and package | Higher precision reference needed where tighter regulation stability is critical | Select 1N5362B/TR8 when system-level voltage accuracy requires <±0.5% total error budget |
| MMBZ5262B-TP | Surface-mount SOT-23 package; 28 V, ±5%; 0.25 W power rating; 100 Ω ZZ | Space-constrained PCBs where axial lead mounting is impractical | Choose MMBZ5262B-TP only for low-power signal-level referencing; not suitable for 5 W dissipation or surge handling |
Compared with 1N5362B/TR8, the 1N5362A/TR8 trades voltage precision for cost and robustness in high-current industrial environments; versus MMBZ5262B-TP, it offers 20× higher power handling and 16× lower dynamic impedance but requires axial through-hole layout space.
Availability
1N5362A/TR8 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and PLC input protection requiring stable component supply and long-term obsolescence management.
Supply support for 1N5362A/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 discrete components for aerospace, defense, and industrial markets.
The 1N53xxA/B series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal resilience, surge survivability, and JEDEC-standardized manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5362A/TR8?
The 1N5362A/TR8 has a nominal Zener voltage of 28 V with a ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual measured VZ at 50 mA test current falls between 25.2 V and 30.8 V at 25 °C lead temperature. The tolerance directly impacts regulation accuracy in feedback or reference applications, and must be accounted for in worst-case circuit analysis.
Can the 1N5362A/TR8 be used in surface-mount designs?
No - the 1N5362A/TR8 is an axial-leaded T-18 package device intended for through-hole mounting. It is not compatible with reflow or wave soldering processes used for SMT. For surface-mount equivalents, Microsemi offers the SMBJ5362B (SMB package, 5 W) or MMBZ5262B-TP (SOT-23, 0.25 W), but neither matches the 1N5362A/TR8's power rating or thermal performance.
What is the maximum steady-state power dissipation for the 1N5362A/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5362A/TR8 has a steady-state power rating of 1.47 W at 25 °C ambient, due to its 85 °C/W junction-to-ambient thermal resistance. Exceeding this without additional heatsinking risks thermal runaway; derating is required above 25 °C ambient per Figure 1 in the datasheet.
Does the 1N5362A/TR8 meet RoHS requirements?
Yes - the "TR8" suffix indicates tape-and-reel packaging, and the base part number includes the "e3" RoHS-compliant designation per Microsemi's documentation. Its leads feature annealed matte-tin plating compliant with RoHS Directive 2011/65/EU, and the void-free epoxy body meets UL94V-0 flammability standards without brominated flame retardants.
How is polarity marked on the 1N5362A/TR8?
The 1N5362A/TR8 uses a cathode band - a single painted stripe near one end of the cylindrical body - to identify the cathode terminal. In Zener operation, this banded end must be held at a more positive potential than the anode (unbanded end) to achieve reverse-bias breakdown and voltage regulation. Forward voltage drop is ≤1.2 V at 1.0 A, per maximum ratings.
1N5362A/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):
- 28 V
- Tolerance:
- ±10%
- 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
1N5362A/TR8 FAQ
1.How can I place an order for 1N5362A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5362A/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 1N5362A/TR8 reliable?
The price and inventory of 1N5362A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5362A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5362A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5362A/TR8 transactions.
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4.How is shipping managed for 1N5362A/TR8?
1N5362A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5362A/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 1N5362A/TR8?
For technical support, including 1N5362A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5362A/TR8 requirements.
6.How does Aetrix verify that 1N5362A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5362A/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 1N5362A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5362A/TR8?
All 1N5362A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5362A/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 1N5362A/TR8 part is unused and in its original packaging.
Return procedure for 1N5362A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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