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Microchip Technology 1N5362B/TR12
- Part No.:
- 1N5362B/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5362B/TR12.pdf
- Description:
- DIODE ZENER 28V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,603
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Product details
Overview
1N5362B/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 28 V, ±5% tolerance (B suffix), 50 mA test current (IZT), 6.0 Ω dynamic impedance (ZZ), and 130 mA maximum Zener current (IZM) when adequately heat-sunk. 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 1N5362B/TR12 datasheet, 1N5362B/TR12 pinout, 1N5362B/TR12 application, or 1N5362B/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (4.7 A), reverse leakage at VR = 21.2 V, and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown. Its 28 V nominal Zener voltage is specified at 50 mA (IZT) with 6.0 Ω dynamic impedance, indicating stable regulation across varying load currents. The 130 mA maximum Zener current (IZM) assumes TL ≤ 25 °C at 3/8″ lead length, and its 4.7 A non-repetitive surge rating (8.3 ms half-sine) supports transient suppression.
Thermal design relies on low junction-to-lead resistance (25 °C/W) rather than junction-to-ambient (85 °C/W on FR4), requiring direct lead heat sinking. Polarity is marked by cathode band; operation requires cathode positive relative to anode. Moisture sensitivity is Level 1 per J-STD-020B-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28 V ±5% at 50 mA - defines stable regulation point under nominal bias |
| Power Dissipation | 5.0 W at TL ≤ 25 °C - requires mechanical heat sinking at leads for full rating |
| Dynamic Impedance (ZZ) | 6.0 Ω at IZT = 50 mA - low impedance ensures minimal voltage shift with current changes |
| Max Zener Current (IZM) | 130 mA - maximum continuous DC current before thermal runaway at rated TL |
| Surge Current (IZSM) | 4.7 A (8.3 ms half-sine) - supports single-event transient suppression without failure |
| Reverse Leakage (IR) | 0.5 μA at VR = 21.2 V - confirms sharp knee and low off-state conduction |
| Thermal Resistance | 25 °C/W junction-to-lead - dictates minimum heatsink mass needed at lead termination |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS-compliant per e3 suffix), solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node / ground return | Connected to lower-potential side; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode | Regulated output node | Banded end; must be held positive relative to anode to maintain Zener conduction and voltage reference stability |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB mechanical and electrical definitions for interchangeability |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants in feedback loops |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to PCB assembly |
| Nonsensitive to ESD | Withstands MIL-STD-750 Method 1020 testing - no special handling needed in production |
| Tape-and-reel packaging (TR12) | Enables automated pick-and-place assembly; TR suffix denotes EIA-296 standard carrier tape |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference establishing regulated output setpoint. Use Value: 6.0 Ω dynamic impedance minimizes output voltage drift across line/load transients, supporting <±1% output regulation. | Use Scenario: Clamping surge-induced voltage spikes on 24 V control bus lines in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting transient energy to ground. Use Value: 4.7 A surge rating (8.3 ms) absorbs IEC 61000-4-5 Level 3 surges without degradation, extending system reliability. |
| Test Equipment Reference Source | Automotive Body Control Module |
Use Scenario: Providing stable 28 V reference for calibration circuits in portable multimeters and signal generators. IC Role / Device Role / Timing Role: Low-drift voltage基准 for ADC/DAC reference dividers. Use Value: ±5% tolerance and <0.5 μA leakage at 21.2 V ensure measurement accuracy over temperature and time. | Use Scenario: Regulating auxiliary 28 V rail for microcontroller power in 24 V vehicle battery systems. IC Role / Device Role / Timing Role: Primary shunt regulator maintaining MCU supply during cold-crank transients. Use Value: –65 °C to +150 °C operating range supports under-hood deployment without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5362B (bulk) | Identical electrical specs; differs only in packaging (loose vs. TR12 tape-and-reel) | No change in circuit function; bulk version requires manual placement or different feeder setup | Select TR12 for SMT automation; choose bulk for prototyping or low-volume hand assembly |
| MMSZ5262ET1G | Surface-mount SOD-123 package; 28 V ±5%, but lower 500 mW rating and higher 30 Ω ZZ | Not suitable for 5 W continuous dissipation; limited to low-power bias/reference roles | Use only where board space constraints prohibit axial leads and power demand is <0.5 W |
Compared with 1N5362B/TR12, the bulk variant offers identical regulation performance but lacks tape-and-reel compatibility, while MMSZ5262ET1G trades power capability and impedance for miniaturization-making it unsuitable for high-current or precision regulation roles served by the 5 W axial device.
Availability
1N5362B/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, test equipment reference sources, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for 1N5362B/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) designs high-reliability analog and mixed-signal semiconductors, with emphasis on radiation-hardened, high-temperature, and military-grade components.
The 1N53xxB series belongs to Microsemi's legacy silicon Zener diode product line, engineered for robust voltage regulation in harsh-environment power systems where thermal stability, surge resilience, and JEDEC-standard interchangeability are critical.
FAQ
What is the Zener voltage tolerance for 1N5362B/TR12?
The 1N5362B/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix per Microsemi documentation. This means its measured VZ at 50 mA test current falls between 26.6 V and 29.4 V at TL = 25 °C. The tolerance is tighter than the ±10% "A" suffix variant and enables more precise regulation in feedback networks.
Can 1N5362B/TR12 be used without a heatsink?
1N5362B/TR12 can operate at up to 5.0 W only when the lead temperature (TL) is maintained at ≤25 °C, typically requiring a heatsink clamped to the leads at 3/8″ (10 mm) from the body. Without heatsinking, its steady-state power drops to 1.47 W on FR4 PCB - so sustained 5 W operation mandates external thermal management.
What does the "TR12" suffix mean in 1N5362B/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12 mm carrier tape width. This format enables automated surface-mount assembly using pick-and-place machines. The "TR" denotes tape-and-reel; "12" specifies tape width - distinct from electrical or thermal characteristics of the 1N5362B/TR12 die itself.
Is 1N5362B/TR12 RoHS compliant?
Yes, 1N5362B/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation. Its leads feature annealed matte-tin plating meeting RoHS requirements, and the void-free thermosetting epoxy case complies with UL94V-0 flammability standards without brominated flame retardants.
What is the maximum reverse leakage current for 1N5362B/TR12?
The maximum reverse leakage current (IR) for 1N5362B/TR12 is 0.5 μA, measured at VR = 21.2 V (76% of nominal VZ). This low leakage confirms sharp Zener knee behavior and minimal off-state power loss, supporting high-impedance reference applications where standby current must be minimized.
1N5362B/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:
- ±5%
- 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
1N5362B/TR12 FAQ
1.How can I place an order for 1N5362B/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5362B/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 1N5362B/TR12 reliable?
The price and inventory of 1N5362B/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5362B/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5362B/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5362B/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5362B/TR12?
1N5362B/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5362B/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 1N5362B/TR12?
For technical support, including 1N5362B/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5362B/TR12 requirements.
6.How does Aetrix verify that 1N5362B/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5362B/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 1N5362B/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5362B/TR12?
All 1N5362B/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5362B/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 1N5362B/TR12 part is unused and in its original packaging.
Return procedure for 1N5362B/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5362B/TR12 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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