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Microchip Technology 1N5359A/TR8
- Part No.:
- 1N5359A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5359A/TR8.pdf
- Description:
- DIODE ZENER 24V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:7,511
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Product details
Overview
1N5359A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 24 V, ±10% tolerance (A suffix), 50 mA test current (IZT), 3.5 Ω dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 19.4 V (VR). 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 1N5359A/TR8 datasheet, 1N5359A/TR8 pinout, 1N5359A/TR8 application, or 1N5359A/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (100 A), voltage regulation (ΔVZ = 0.55 V), and RoHS-compliant tape-and-reel packaging (TR8 suffix).
Technical Context
The 1N5359A/TR8 functions as a two-terminal voltage regulator in reverse-biased operation, maintaining stable 24 V output across a wide current range (10–100 mA) with minimal voltage drift versus temperature. Its low dynamic impedance (3.5 Ω) ensures tight regulation under varying load conditions.
Designed for through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 1.47 W steady-state power at 25 °C ambient when using standard 4 mm² pads and 1 mm × 25 mm trace; junction-to-lead thermal resistance is 25 °C/W at 10 mm lead length, enabling high-current operation with minimal heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±10% - defines nominal regulation point; actual range 21.6–26.4 V at 50 mA test current. |
| Test Current (IZT) | 50 mA - operating point where VZ and ZZ are specified; design must ensure minimum 10% IZM (8 A) for stable regulation. |
| Dynamic Impedance (ZZ) | 3.5 Ω - low AC resistance ensures <0.55 V voltage shift between 10% and 50% of max current (IZM). |
| Max Reverse Current (IR) | 0.5 μA @ 19.4 V - confirms sharp knee and low leakage below regulation threshold. |
| Surge Current (IZSM) | 100 A - withstands non-repetitive 8.3 ms half-sine transients, critical for input-stage clamping. |
| Thermal Resistance (RθJL) | 25 °C/W - enables 5 W dissipation with only 125 °C rise above lead temperature at 3/8″ lead length. |
| Power Dissipation (Pd) | 5.0 W @ TL = 25 °C - rated for continuous DC operation; derates linearly above 25 °C lead temp. |
Pinout & Package
Package: Axial-leaded T-18 plastic case per JEDEC DO-204AL; cathode indicated by color band; RoHS-compliant matte-tin plating; weight 0.7 g; moisture sensitivity level 1 (no dry pack required).
| 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 | Regulated output node | Banded end; connects to voltage node requiring stabilization (e.g., feedback divider tap); must be held positive relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-204AL mechanical and electrical definitions for interchangeability. |
| ±10% voltage tolerance (A suffix) | Cost-optimized regulation accuracy suitable for non-critical biasing and clamping applications. |
| Low dynamic impedance (3.5 Ω) | Minimizes output voltage variation under load changes-critical for stable feedback in switching regulators. |
| High surge current rating (100 A) | Provides robust transient suppression without external TVS devices in 24 V industrial power rails. |
| Tape-and-reel packaging (TR8) | Enables automated SMT-compatible placement despite axial-leaded form factor; EIA-296 compliant. |
Applications
| Switching Power Supply Feedback | Industrial Sensor Biasing |
|---|---|
Use Scenario: Regulates reference voltage for UC384x-family PWM controllers in 24 V offline SMPS designs. IC Role / Device Role / Timing Role: Zener provides stable 24 V reference to optocoupler LED anode, closing isolated feedback loop. Use Value: Low ΔVZ (0.55 V) ensures <2.3% output voltage deviation across full load range, meeting EN 61000-3-2 compliance. |
Use Scenario: Supplies precise bias to 4–20 mA current-loop transmitter ICs in hazardous-area pressure sensors. IC Role / Device Role / Timing Role: Acts as shunt regulator for analog front-end op-amp supply, rejecting ripple from 24 V loop power. Use Value: 0.5 μA IR at 19.4 V prevents loading of high-impedance sensor bridges, preserving >14-bit measurement resolution. |
| Overvoltage Clamp for PLC Inputs | DC Link Voltage Reference |
Use Scenario: Protects digital input circuitry in programmable logic controllers against 24 V rail surges exceeding 30 V. IC Role / Device Role / Timing Role: Shunt clamp activated during transients; conducts 100 A peak surge without failure. Use Value: 100 A IZSM rating eliminates need for parallel TVS diodes, reducing BOM count and board space by 35%. |
Use Scenario: Sets threshold for undervoltage lockout (UVLO) comparators monitoring 24 V DC link in motor drives. IC Role / Device Role / Timing Role: Provides temperature-stable trip point; referenced against comparator hysteresis band. Use Value: –65 °C to +150 °C operating range ensures reliable UVLO activation across automotive under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B/TR8 | ±5% tolerance (vs. ±10% for 1N5359A/TR8); identical VZ, IZT, ZZ, and package. | Required where tighter regulation stability is needed-e.g., precision ADC reference buffers. | Select 1N5359B/TR8 when voltage accuracy outweighs cost sensitivity; same footprint and thermal behavior. |
| MMBZ5242B (SOT-23) | Surface-mount, 0.5 W rating, 24 V ±5%, 20 Ω ZZ-lower power, higher impedance, smaller footprint. | Suitable for low-current biasing in space-constrained consumer electronics, not high-power clamping. | Choose MMBZ5242B only for <100 mA applications with PCB area constraints; cannot replace 1N5359A/TR8 in 5 W roles. |
Compared with 1N5359B/TR8, the 1N5359A/TR8 trades voltage accuracy for cost and availability; compared with MMBZ5242B, it delivers 10× higher power handling and 5.7× lower dynamic impedance but requires axial through-hole assembly.
Availability
1N5359A/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, PLC I/O modules, and 24 V sensor signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 1N5359A/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing surge resilience, wide temperature operation, and JEDEC-standard interoperability.
FAQ
What is the Zener voltage tolerance of the 1N5359A/TR8?
The 1N5359A/TR8 has a ±10% Zener voltage tolerance, meaning its regulated voltage falls between 21.6 V and 26.4 V at 50 mA test current. This tolerance is designated by the "A" suffix per Microsemi's documentation and is less tight than the ±5% offered by the 1N5359B/TR8 variant, making the 1N5359A/TR8 appropriate for cost-sensitive applications where absolute voltage precision is secondary to reliability and surge handling.
Can the 1N5359A/TR8 be used in surface-mount designs?
No-the 1N5359A/TR8 is an axial-leaded T-18 package (DO-204AL) intended for through-hole mounting. While it ships in tape-and-reel (TR8) format for automated handling, its leads require hole placement and wave/soldering. For surface-mount equivalents, Microsemi offers the SMBJ5359A series; the 1N5359A/TR8 itself cannot be mounted on SMT pads without mechanical adaptation or adapter hardware.
What is the maximum continuous power dissipation for the 1N5359A/TR8?
The 1N5359A/TR8 is rated for 5.0 W continuous power dissipation at a lead temperature (TL) of 25 °C, measured 3/8 inch (10 mm) from the body. Above 25 °C, power must be linearly derated at 20 mW/°C-e.g., at TL = 75 °C, max power drops to 4.0 W. This rating assumes adequate heat sinking; on a standard FR4 board with 4 mm² copper, steady-state power is limited to 1.47 W at 25 °C ambient.
How does the 1N5359A/TR8 perform under transient surge conditions?
The 1N5359A/TR8 supports a maximum non-repetitive surge current (IZSM) of 100 A for an 8.3 ms half-sine waveform, verified per JEDEC standards. This enables it to absorb common industrial transients-such as inductive kickback from solenoid drivers-without degradation. Its 25 °C/W junction-to-lead thermal resistance allows rapid heat dissipation into the PCB traces or chassis, sustaining repeated surges when properly mounted.
Is the 1N5359A/TR8 RoHS compliant?
Yes-the "e3" designation in Microsemi's official documentation confirms RoHS compliance for the 1N5359A/TR8, with annealed matte-tin plating meeting MIL-STD-750 Method 2026 solderability requirements. The TR8 tape-and-reel packaging also complies with EIA-296 standards, and the void-free epoxy case meets UL94V-0 flammability rating-making it suitable for environmentally regulated industrial and medical equipment.
1N5359A/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:
- ±10%
- 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
1N5359A/TR8 FAQ
1.How can I place an order for 1N5359A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5359A/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 1N5359A/TR8 reliable?
The price and inventory of 1N5359A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5359A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5359A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5359A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5359A/TR8?
1N5359A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5359A/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 1N5359A/TR8?
For technical support, including 1N5359A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5359A/TR8 requirements.
6.How does Aetrix verify that 1N5359A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5359A/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 1N5359A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5359A/TR8?
All 1N5359A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5359A/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 1N5359A/TR8 part is unused and in its original packaging.
Return procedure for 1N5359A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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