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Microchip Technology 1N5359E3/TR8
- Part No.:
- 1N5359E3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5359E3/TR8.pdf
- Description:
- DIODE ZENER 24V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,252
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Product details
Overview
1N5359E3/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 24 V, ±5% tolerance (B-suffix equivalent), 50 mA test current, 3.5 Ω maximum dynamic impedance at IZT, and 100 mA maximum surge current (8.3 ms half-sine). 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 1N5359E3/TR8 datasheet, 1N5359E3/TR8 pinout, 1N5359E3/TR8 application, or 1N5359E3/TR8 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8) for automated assembly.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown, with Zener voltage specified at 24 V ±5% measured at 50 mA DC test current and 25 °C lead temperature. Its low dynamic impedance (≤3.5 Ω) ensures minimal voltage variation across 10–50% of maximum Zener current (IZM = 100 mA).
Thermal design relies on junction-to-lead thermal resistance of 25 °C/W (at 3/8″ lead length), enabling 5 W steady-state dissipation only with adequate heat sinking; mounted on FR4 with 4 mm² copper pads, derated to 1.47 W at 25 °C ambient. Polarity is marked by cathode band - device must be biased with banded end positive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±5% - stable regulation point for feedback networks requiring tight voltage reference accuracy. |
| Test Current (IZT) | 50 mA - operating point where VZ and dynamic impedance are guaranteed per JEDEC spec. |
| Dynamic Impedance (ZZ) | ≤3.5 Ω at IZT - low AC resistance minimizes output voltage ripple in regulation circuits. |
| Max Surge Current (IZSM) | 100 A (8.3 ms half-sine) - withstands transient overloads without degradation. |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - requires mechanical heat sinking or PCB copper area for full-power operation. |
| Junction-to-Lead Rθ | 25 °C/W - defines thermal path efficiency; dictates minimum lead length and heatsinking for safe continuous operation. |
| Reverse Leakage (IR) | ≤0.5 μA at 19.2 V - negligible standby current in high-impedance bias networks. |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by colored band. Leads are annealed matte-tin plated (RoHS compliant per e3 suffix), solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry terminal in reverse-bias mode | Connected to lower-potential node (e.g., ground or return path) when regulating. |
| Cathode (banded end) | Current exit terminal in reverse-bias mode | Connected to regulated voltage node; polarity marking critical for correct orientation in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers. |
| Moisture sensitivity Level 1 | No dry-pack required - simplifies handling and eliminates bake-out prior to reflow. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual assembly or testing. |
| Tape-and-reel packaging (TR8) | Enables high-speed pick-and-place placement; TR8 denotes 8 mm carrier tape per EIA-296. |
| Stable voltage regulation (ΔVZ ≤ 0.55 V) | Maximum 0.55 V deviation between 10% and 50% of IZM, ensuring predictable performance across load range. |
Applications
| Switching Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Integrated into optocoupler feedback loop of isolated DC-DC converter to regulate output voltage. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier threshold; replaces TL431 in cost-sensitive designs. Use Value: Delivers 24 V reference with ±5% tolerance and low ΔVZ, enabling stable regulation across line/load transients without external trimming. |
Use Scenario: Placed across input rail of industrial sensor interface to limit voltage spikes from inductive switching. IC Role / Device Role / Timing Role: Shunt clamping device absorbing transient energy above 24 V threshold. Use Value: Withstands 100 A surge (8.3 ms) and exhibits <0.5 μA leakage below 19.2 V, minimizing standby power loss while protecting downstream ICs. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Used with series resistor in microcontroller ADC reference circuit for stable analog measurement. IC Role / Device Role / Timing Role: Precision DC voltage source providing known reference for analog front-end scaling. Use Value: Maintains 24 V ±5% over –65 °C to +150 °C with low thermal resistance (25 °C/W), reducing calibration drift in harsh environments. |
Use Scenario: Establishes bias point for op-amp input stage in automotive engine control unit. IC Role / Device Role / Timing Role: Stable DC node generator compensating for semiconductor parameter shifts with temperature. Use Value: Low dynamic impedance (≤3.5 Ω) and minimal voltage regulation shift (ΔVZ ≤ 0.55 V) ensure consistent bias despite current variations from sensor loading. |
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 | No e3 RoHS suffix; SnPb lead finish; same electrical specs and T-18 package. | Not suitable for RoHS-compliant production; requires exemption documentation. | Select 1N5359B only for legacy repair or non-RoHS programs where SnPb is permitted. |
| SMBJ5359B | Surface-mount SMB package; identical 24 V/5% specs but higher thermal resistance (junction-to-ambient ≈ 85 °C/W on FR4). | Requires PCB redesign; unsuitable for through-hole legacy boards or high-power dissipation without thermal pads. | Choose SMBJ5359B only when board space is constrained and thermal management via copper pour is feasible. |
Compared with 1N5359B and SMBJ5359B, the 1N5359E3/TR8 uniquely combines RoHS compliance, axial-leaded T-18 packaging for manual or wave-solder compatibility, and optimized thermal performance (25 °C/W) - making it ideal for cost-sensitive, high-reliability power supply and clamp applications requiring regulatory compliance and ease of integration.
Availability
1N5359E3/TR8 is available at Aetrix Electronics and suitable for switching power supply feedback, overvoltage protection clamp, and programmable voltage reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5359E3/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 1N53xxB series was designed for robust, JEDEC-standardized voltage regulation in demanding environments - emphasizing thermal resilience, surge survivability, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5359E3/TR8?
The 1N5359E3/TR8 has a Zener voltage tolerance of ±5%, confirmed by its "B" suffix in the base part number (1N5359B) and retained in the RoHS-compliant e3 variant. This tolerance applies at 50 mA test current and 25 °C lead temperature, per JEDEC-registered specifications in the Microsemi datasheet Rev D.
Does the 1N5359E3/TR8 require dry packing before reflow soldering?
No, the 1N5359E3/TR8 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to reflow. This simplifies handling and reduces manufacturing overhead in SMT lines.
What is the maximum continuous power dissipation for the 1N5359E3/TR8 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz Cu) with 4 mm² copper pads and 1 mm track width, the 1N5359E3/TR8 is rated for 1.47 W at 25 °C ambient - significantly derated from its 5 W rating at 25 °C lead temperature due to higher junction-to-ambient thermal resistance (85 °C/W).
How is polarity marked on the 1N5359E3/TR8, and what is the correct biasing direction?
The 1N5359E3/TR8 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the unbanded (anode) end to operate in reverse breakdown. Forward voltage is ≤1.2 V at 1.0 A, but forward conduction is not its intended use case.
What does the "TR8" suffix mean in the 1N5359E3/TR8 part number?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, using an 8 mm carrier tape. This format supports automated surface-mount assembly equipment and is distinct from bulk or ammo-pack options - critical for high-volume production of the 1N5359E3/TR8.
1N5359E3/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:
- ±20%
- 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
1N5359E3/TR8 FAQ
1.How can I place an order for 1N5359E3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5359E3/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 1N5359E3/TR8 reliable?
The price and inventory of 1N5359E3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5359E3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5359E3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5359E3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5359E3/TR8?
1N5359E3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5359E3/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 1N5359E3/TR8?
For technical support, including 1N5359E3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5359E3/TR8 requirements.
6.How does Aetrix verify that 1N5359E3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5359E3/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 1N5359E3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5359E3/TR8?
All 1N5359E3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5359E3/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 1N5359E3/TR8 part is unused and in its original packaging.
Return procedure for 1N5359E3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5359E3/TR8 Tags
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