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Microchip Technology 1N5359E3/TR12
- Part No.:
- 1N5359E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5359E3/TR12.pdf
- Description:
- DIODE ZENER 24V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,495
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Product details
Overview
1N5359E3/TR12 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 dynamic impedance at IZT, and maximum reverse leakage of 0.5 μA at 19.4 V. 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/TR12 datasheet, 1N5359E3/TR12 pinout, 1N5359E3/TR12 application, or 1N5359E3/TR12 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge current rating (100 A), 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 Zener voltage is specified at 24 V ±5% with 50 mA test current, and it maintains regulation across a wide current range (10%–50% of IZM = 8.0–40 mA), exhibiting ΔVZ ≤ 0.55 V over that span.
Thermal design relies on lead-length-dependent junction-to-lead resistance (25 °C/W at 3/8″ lead length) rather than board-mounted ambient dissipation. The cathode band indicates polarity, and operation requires the banded end to be positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V ±5% - stable regulation point for feedback networks requiring tight voltage reference |
| Test Current (IZT) | 50 mA - defined operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 3.5 Ω at IZT - low AC resistance ensures minimal output voltage variation with load transients |
| Max Reverse Leakage (IR) | 0.5 μA at 19.4 V - negligible standby current in high-impedance bias or sensing circuits |
| Max Regulator Current (IZM) | 100 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25 °C |
| Surge Current (IZSM) | 100 A (8.3 ms half-sine) - withstands short-duration overvoltage events without failure |
| Voltage Regulation (ΔVZ) | 0.55 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free thermosetting epoxy, UL94V-0 rated), 0.7 g weight, moisture sensitivity Level 1 (no dry pack required). Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node; reverse-biased operation places cathode at higher potential |
| Cathode | Zener breakdown terminal | Banded end; must be held at higher potential than anode to enable regulation; connects to feedback node or voltage rail |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Solderable per MIL-STD-750 Method 2026; supports lead-free reflow up to 260 °C for 10 s |
| Low thermal resistance | 25 °C/W junction-to-lead at 3/8″ lead length enables high-current operation with simple heatsinking |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling required during assembly |
| Stable voltage regulation | ΔVZ ≤ 0.55 V across 10–50% of IZM ensures predictable performance in feedback control loops |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier threshold in secondary-side regulation loop. Use Value: 24 V ±5% VZ provides accurate setpoint for ±1% output regulation; low ZZ minimizes loop gain variation. | Use Scenario: Placed across sensitive IC inputs or bus lines to clamp transient overvoltages. IC Role / Device Role / Timing Role: Shunt protection device diverting surge energy to ground when voltage exceeds 24 V. Use Value: 100 A surge rating and 0.55 V regulation window ensure reliable clamping without thermal runaway during 8.3 ms transients. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Paired with series resistor to generate stable bias voltage for op-amp input stages or sensor excitation. IC Role / Device Role / Timing Role: Precision DC reference source delivering fixed 24 V to analog signal chains. Use Value: ±5% tolerance and <0.5 μA leakage enable stable biasing in high-impedance nodes with minimal drift. | Use Scenario: Configured in constant-current sink topology using external resistor to bias laser diodes or LED strings. IC Role / Device Role / Timing Role: Voltage-controlled current regulator defining IOUT = (VZ − VBE)/RSET. Use Value: Tight ΔVZ (0.55 V) and low ZZ ensure current accuracy within ±3% across temperature and supply variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B | Same 24 V ±5%, 5 W rating, but non-RoHS tin-lead plating; identical electrical specs and T-18 package | No change in circuit function or layout; differs only in solder alloy compatibility and environmental compliance | Select 1N5359B only if leaded solder process is used and RoHS exemption applies |
| MMSZ5245B-TP | Surface-mount SOD-123 package; 24 V ±5%, 500 mW rating; ZZ = 35 Ω - 10× higher impedance than 1N5359E3/TR12 | Not suitable for high-current regulation; limited to low-power biasing due to power and thermal constraints | Choose MMSZ5245B-TP only for space-constrained PCBs where <100 mA regulation is unnecessary |
Compared with 1N5359B and MMSZ5245B-TP, the 1N5359E3/TR12 uniquely combines RoHS compliance, 5 W power handling, low 3.5 Ω impedance, and axial-leaded mechanical robustness - making it optimal for industrial power supplies requiring field-replaceable through-hole components.
Availability
1N5359E3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and current source biasing requiring stable component supply across extended temperature ranges and high-reliability environments.
Supply support for 1N5359E3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized 5 W voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and long-term parametric consistency.
FAQ
What is the Zener voltage tolerance of the 1N5359E3/TR12?
The 1N5359E3/TR12 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix implied in its electrical specification table (matching 1N5359B). This is confirmed in Note 1 of the datasheet: "Devices listed above with B suffix have ±5% tolerance." The "e3" suffix denotes RoHS compliance and does not affect tolerance.
Can the 1N5359E3/TR12 be used in surface-mount designs?
No - the 1N5359E3/TR12 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi offers the SMBJ5359B or SMBG5359B in DO-214AA/DO-214AB packages, which share the same 24 V ±5% regulation but differ in thermal and mounting characteristics.
What is the maximum steady-state power dissipation of the 1N5359E3/TR12 at 25 °C?
The 1N5359E3/TR12 delivers 5.0 W steady-state power dissipation at 25 °C when leads are held at TL = 25 °C with 3/8″ (10 mm) length from body. On FR4 PCB with 1 oz copper, its derated power drops to 1.47 W at TA = 25 °C - a critical design constraint for board-level thermal management.
How is polarity marked on the 1N5359E3/TR12?
The 1N5359E3/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to operate in Zener breakdown. This marking is consistent across all 1N53xx devices and is visible on the black epoxy body.
Does the 1N5359E3/TR12 require dry-packing for moisture sensitivity?
No - the 1N5359E3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and requires no dry pack or baking prior to soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during reflow.
1N5359E3/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N5359E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5359E3/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 1N5359E3/TR12 reliable?
The price and inventory of 1N5359E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5359E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5359E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5359E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5359E3/TR12?
1N5359E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5359E3/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 1N5359E3/TR12?
For technical support, including 1N5359E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5359E3/TR12 requirements.
6.How does Aetrix verify that 1N5359E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5359E3/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 1N5359E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5359E3/TR12?
All 1N5359E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5359E3/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 1N5359E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5359E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5359E3/TR12 Tags
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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
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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
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MM5Z5V1ST1G
onsemi
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SMAZ12-13-F
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