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Microchip Technology 1N5359A/TR12
- Part No.:
- 1N5359A/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5359A/TR12.pdf
- Description:
- DIODE ZENER 24V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,179
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Product details
Overview
1N5359A/TR12 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 maximum dynamic impedance (ZZ), and 0.5 μA maximum reverse leakage 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/TR12 datasheet, 1N5359A/TR12 pinout, 1N5359A/TR12 application, or 1N5359A/TR12 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 matte-tin plating per MIL-STD-750.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable output voltage across wide current variation (IZM = 100 mA at TL = 25 °C). Its low dynamic impedance (3.5 Ω) ensures minimal voltage shift under load transients, while its 25 °C/W junction-to-lead thermal resistance enables reliable 5 W dissipation with minimal heatsinking when leads are trimmed to 10 mm.
The device features cathode band polarity marking, UL94V-0 void-free epoxy encapsulation, and moisture sensitivity level 1-no dry pack required. It withstands 8.3 ms half-sine surge currents up to 100 A and exhibits <0.55 V voltage regulation between 10% and 50% of IZM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±10% - defines nominal regulation point; high-end tolerance yields 26.4 V for IZM derating calculations |
| Test Current (IZT) | 50 mA - operating point where VZ and ZZ are specified; establishes bias stability in shunt regulator designs |
| Dynamic Impedance (ZZ) | 3.5 Ω max - determines output voltage ripple rejection; lower value improves regulation under varying load current |
| Max Reverse Leakage (IR) | 0.5 μA @ 19.4 V - ensures minimal standby power loss in high-impedance reference circuits |
| Surge Current (IZSM) | 100 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure in input protection stages |
| Voltage Regulation (ΔVZ) | 0.55 V - difference between VZ measured at 10% and 50% of IZM; quantifies line regulation performance |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables full 5 W operation with 3/8″ (10 mm) lead length; critical for PCB layout thermal design |
Pinout & Package
Package: T-18 axial-leaded plastic case (UL94V-0 epoxy), cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or common return; forms low-impedance path for reverse-bias current |
| Cathode | Regulated output node | Banded end; connected to voltage node requiring stabilization; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions and electrical behavior across global supply chain and legacy designs |
| ±10% voltage tolerance (A suffix) | Provides cost-optimized regulation accuracy suitable for non-critical power rail supervision and clamp applications |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and baking prior to assembly-reduces manufacturing overhead and handling risk |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Enables safe handling in standard production environments without special static control beyond baseline requirements |
| RoHS-compliant option (e3 suffix) | Meets EU Directive 2011/65/EU; matte-tin plating ensures solderability and long-term intermetallic reliability |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Stabilizing error amplifier reference in isolated flyback or forward converter feedback networks. IC Role / Device Role / Timing Role: Zener diode provides precise 24 V reference to optocoupler LED anode, enabling accurate secondary-side voltage sensing. Use Value: Low ΔVZ (0.55 V) and stable VZ over temperature ensure ±1.5% output regulation across –40 °C to +85 °C ambient. |
Use Scenario: Biasing bridge sensor outputs in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Supplies stable 24 V excitation to resistive strain gauges and RTDs in harsh industrial environments. Use Value: 150 °C max storage temperature and 0.5 μA IR at 19.4 V minimize drift and self-heating errors in precision analog signal chains. |
| Overvoltage Clamp Protection | Programmable Logic Controller Input Conditioning |
Use Scenario: Protecting microcontroller GPIO pins from inductive kickback in relay driver circuits. IC Role / Device Role / Timing Role: Shunts transient energy above 24 V to ground, limiting peak voltage seen by downstream logic inputs. Use Value: 100 A surge rating and fast response (<100 ns) prevent latch-up or gate oxide damage during 8.3 ms surges. |
Use Scenario: Level-shifting and clamping 24 V DC field signals to 5 V logic-compatible levels in PLC digital input modules. IC Role / Device Role / Timing Role: Acts as passive clamp to limit input voltage swing while maintaining noise margin against EMI. Use Value: 3.5 Ω ZZ and tight thermal resistance ensure consistent clamping threshold across repeated switching cycles and ambient variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B | ±5% VZ tolerance (vs. ±10% for 1N5359A/TR12); identical VZ, IZT, ZZ, and package | Higher accuracy required in closed-loop feedback where tighter regulation reduces output error | Select 1N5359B when system-level voltage tolerance budget is ≤±2.5% and cost premium is acceptable |
| MMSZ5245B-TP | Surface-mount SOD-123 package; 24 V ±5%, 20 mA IZT, 30 Ω ZZ, 500 mW rating | Used in space-constrained, high-density PCBs where axial leads are incompatible with automated placement | Choose MMSZ5245B-TP only if board area is constrained and thermal derating to ≤500 mW is acceptable |
Compared with 1N5359B and MMSZ5245B-TP, the 1N5359A/TR12 offers optimal balance of cost, 5 W power handling, and axial-mount flexibility for industrial power supplies and ruggedized equipment-without requiring PCB redesign or thermal redesign.
Availability
1N5359A/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor excitation circuits, and overvoltage protection systems requiring stable component supply and long-lifecycle support.
Supply support for 1N5359A/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N53xxA/B series was designed for robust voltage regulation in mission-critical power systems where thermal stability, surge resilience, and long-term parameter consistency are mandatory.
FAQ
What is the Zener voltage tolerance for 1N5359A/TR12?
The 1N5359A/TR12 has a nominal Zener voltage of 24 V with ±10% tolerance, as indicated by the "A" suffix per Microsemi's documentation. This means the actual VZ falls between 21.6 V and 26.4 V at 50 mA test current and 25 °C lead temperature. The tolerance directly impacts regulation accuracy in feedback loops and must be accounted for in worst-case circuit analysis.
Can 1N5359A/TR12 be used in surface-mount designs?
No-1N5359A/TR12 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, consider SMBJ5359B (DO-214AA) or MMSZ5245B-TP (SOD-123), though both differ in power rating, impedance, and thermal performance. The 1N5359A/TR12 requires through-hole mounting with ≥10 mm lead length for rated 5 W operation.
What is the maximum surge current rating for 1N5359A/TR12?
The 1N5359A/TR12 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 enables reliable transient suppression in input-stage protection circuits, provided the surge duty cycle remains low and average power dissipation stays within thermal limits defined by RθJL = 25 °C/W.
How does the thermal resistance affect 1N5359A/TR12's power handling?
The 1N5359A/TR12 has a junction-to-lead thermal resistance of 25 °C/W when leads are trimmed to 3/8″ (10 mm) from the body. At 25 °C ambient, this allows full 5 W dissipation; above 25 °C, power must be linearly derated. On FR4 PCBs with 1 oz copper, RθJA rises to 85 °C/W, limiting steady-state power to ~1.47 W unless additional copper area or heatsinking is added.
Is 1N5359A/TR12 RoHS compliant?
Yes-1N5359A/TR12 is available in RoHS-compliant form with matte-tin plated leads, meeting EU Directive 2011/65/EU. The "e3" suffix denotes RoHS compliance; however, the base part number 1N5359A/TR12 (without e3) may use tin-lead plating. Confirm compliance status with the specific lot or ordering code before use in regulated markets.
1N5359A/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):
- 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/TR12 FAQ
1.How can I place an order for 1N5359A/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5359A/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 1N5359A/TR12 reliable?
The price and inventory of 1N5359A/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5359A/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5359A/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5359A/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5359A/TR12?
1N5359A/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5359A/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 1N5359A/TR12?
For technical support, including 1N5359A/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5359A/TR12 requirements.
6.How does Aetrix verify that 1N5359A/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5359A/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 1N5359A/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5359A/TR12?
All 1N5359A/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5359A/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 1N5359A/TR12 part is unused and in its original packaging.
Return procedure for 1N5359A/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5359A/TR12 Tags
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