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Microchip Technology 1N5359B/TR8
- Part No.:
- 1N5359B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5359B/TR8.pdf
- Description:
- DIODE ZENER 24V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,453
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Product details
Overview
1N5359B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 24 V, ±5% tolerance (B suffix), 3.5 Ω maximum dynamic impedance at 50 mA test current, and 75 mA maximum regulator 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 1N5359B/TR8 datasheet, 1N5359B/TR8 pinout, 1N5359B/TR8 application, or 1N5359B/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (100 A), reverse leakage (<0.5 µA at 19.4 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a two-terminal voltage reference where cathode (banded end) is biased positive relative to anode. Its regulation relies on controlled reverse breakdown with minimal ΔVZ (0.55 V) between 10% and 50% of IZM, ensuring stable output under varying load currents.
The 1N5359B/TR8 uses void-free thermosetting epoxy encapsulation (UL94V-0), achieves moisture sensitivity level 1 (no dry pack required), and supports tape-and-reel packaging (TR8 suffix denotes EIA-296 compliant reel). Thermal performance is specified for 3/8″ (10 mm) lead length from body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±5% - precise regulation point at 50 mA test current; defines stable reference voltage under normal operation. |
| Power Dissipation | 5.0 W at TL = 25 °C - maximum steady-state power handling with adequate heat sinking at lead temperature. |
| Dynamic Impedance (ZZ) | 3.5 Ω max @ IZT = 50 mA - low AC impedance ensures minimal voltage variation with small current changes. |
| Max Regulator Current (IZM) | 75 mA - maximum DC current before exceeding 5 W at VZ = 24 V; determines usable current range. |
| Reverse Leakage (IR) | <0.5 µA @ VR = 19.4 V - extremely low off-state conduction preserves efficiency in standby or high-impedance bias networks. |
| Surge Current (IZSM) | 100 A peak (8.3 ms half-sine) - withstands transient overvoltage events without degradation. |
| Voltage Regulation (ΔVZ) | 0.55 V - difference between VZ measured 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 are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; forms return path for Zener current. |
| Cathode (banded end) | Regulated output node | Biased positive relative to anode; delivers stable 24 V reference or clamping voltage. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers. |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants for critical references. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for immediate SMT/reflow or hand-soldering. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during assembly. |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with matte-tin plating-no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Provides precise 24 V reference to optocoupler input, enabling accurate output voltage regulation. Use Value: Maintains ±1% output accuracy over temperature (–40 °C to +85 °C) due to low ΔVZ and tight tolerance. |
Use Scenario: Protecting microcontroller I/O pins from 24 V field wiring transients in PLC modules. IC Role / Device Role / Timing Role: Shunts surge energy above 24 V to ground, limiting pin voltage to safe levels. Use Value: Withstands 100 A surge (8.3 ms) without failure, preventing latch-up or gate oxide damage. |
| Programmable Logic Controller (PLC) Input Conditioning | Test Equipment Reference Source |
Use Scenario: Level-shifting and clamping 24 V sensor signals to 3.3 V logic inputs via resistor divider + Zener clamp. IC Role / Device Role / Timing Role: Acts as bidirectional voltage limiter-clamps negative excursions to ~0.7 V (forward) and positive to 24 V (reverse). Use Value: Enables robust signal conditioning with <0.5 µA leakage, minimizing divider loading error. |
Use Scenario: Generating stable 24 V calibration reference in portable multimeters and bench power supplies. IC Role / Device Role / Timing Role: Serves as primary voltage standard in feedback loop of precision reference circuitry. Use Value: Delivers 24 V ±5% with 3.5 Ω ZZ, supporting <10 ppm/°C drift tracking in compensated designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B (bulk) | No TR8 tape-and-reel packaging; same electrical specs, thermal resistance, and marking. | Suitable for manual prototyping or low-volume hand assembly; not optimized for automated pick-and-place. | Select 1N5359B/TR8 for SMT production lines requiring EIA-296 compliant reels; choose bulk for lab evaluation or repair stock. |
| MMSZ5242B-TP (Micro Commercial Components) | Surface-mount SOD-123 package (0.5 W), 24 V ±5%, ZZ = 30 Ω @ 20 mA - higher impedance, lower power, smaller footprint. | Used in space-constrained consumer electronics; lacks surge rating and thermal mass for industrial 5 W duty. | Choose MMSZ5242B-TP only for low-power, board-area-limited designs where 100 A surge immunity and 5 W dissipation are unnecessary. |
Compared with 1N5359B/TR8, the bulk variant offers identical regulation but no automated assembly support, while MMSZ5242B-TP trades power handling and surge robustness for miniaturization-making 1N5359B/TR8 optimal for ruggedized 24 V industrial systems requiring long-term stability and transient resilience.
Availability
1N5359B/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controller (PLC) input modules, and test equipment reference circuits requiring stable component supply, consistent Zener voltage tolerance, and reliable surge immunity.
Supply support for 1N5359B/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 wide temperature operation (–65 °C to +150 °C), high surge survivability, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5359B/TR8?
The 1N5359B/TR8 has a nominal Zener voltage of 24 V with a tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This tolerance is verified at 50 mA test current and 25 °C lead temperature. The 1N5359B/TR8 maintains this specification across its full operating temperature range of –65 °C to +150 °C, making it suitable for precision reference applications where stability is critical.
Does the 1N5359B/TR8 require dry packing before use?
No, the 1N5359B/TR8 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it does not require dry packing or floor-life controls. Its void-free thermosetting epoxy encapsulation prevents moisture ingress, allowing immediate use in reflow or hand-soldering processes without baking or special handling-unlike higher-MSL discrete components.
What is the maximum surge current rating for the 1N5359B/TR8?
The 1N5359B/TR8 is rated for a maximum non-recurrent surge current (IZSM) of 100 A, defined as the peak of an 8.3 ms half-sine waveform. This rating reflects its ability to absorb transient energy without parametric shift or catastrophic failure, supporting robust overvoltage protection in industrial 24 V control systems where lightning-induced surges or inductive kickback may occur.
How does the thermal resistance of the 1N5359B/TR8 affect its power handling?
The 1N5359B/TR8 has a junction-to-lead thermal resistance of 25 °C/W when mounted with 3/8″ (10 mm) lead length from the body. At 25 °C ambient, this allows full 5 W dissipation; above that, derating applies linearly. For example, at 75 °C lead temperature, maximum power drops to 3.75 W. Proper heatsinking of the leads is essential to maintain reliability in continuous 24 V regulation applications.
Is the 1N5359B/TR8 RoHS-compliant?
Yes, the 1N5359B/TR8 is RoHS-compliant, as confirmed by the "e3" designation in Microsemi's official documentation. It features RoHS-compliant matte-tin plating on annealed copper leads, meeting EU Directive 2011/65/EU requirements for restriction of hazardous substances-including absence of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE.
1N5359B/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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 17.3 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
1N5359B/TR8 FAQ
1.How can I place an order for 1N5359B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5359B/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 1N5359B/TR8 reliable?
The price and inventory of 1N5359B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5359B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5359B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5359B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5359B/TR8?
1N5359B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5359B/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 1N5359B/TR8?
For technical support, including 1N5359B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5359B/TR8 requirements.
6.How does Aetrix verify that 1N5359B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5359B/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 1N5359B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5359B/TR8?
All 1N5359B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5359B/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 1N5359B/TR8 part is unused and in its original packaging.
Return procedure for 1N5359B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5359B/TR8 Tags
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