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Microchip Technology 1N5366E3/TR12
- Part No.:
- 1N5366E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366E3/TR12.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,643
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Product details
Overview
1N5366E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 39 V, ±5% tolerance (B-suffix equivalent), 30 mA test current, 14 Ω dynamic impedance at IZT, and maximum reverse leakage of 0.5 μA at 29.7 V. 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 1N5366E3/TR12 datasheet, 1N5366E3/TR12 pinout, 1N5366E3/TR12 application, or 1N5366E3/TR12 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge current rating (170 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across wide operating current ranges (10–50% of IZM). Its low dynamic impedance (14 Ω) ensures minimal voltage variation (ΔVZ = 3.1 V) between 10% and 50% of maximum Zener current.
Designed for axial-lead through-hole mounting on FR4 PCBs with 4 mm² copper pads, it delivers 39 V regulation with 25 °C/W thermal resistance when leads are trimmed to 10 mm from body, enabling reliable operation up to 1.47 W at ambient temperature without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, ±5% tolerance - defines regulated output voltage under specified test conditions. |
| Test Current (IZT) | 30 mA - current at which VZ is measured; sets baseline operating point for regulation accuracy. |
| Dynamic Impedance (ZZ) | 14 Ω at IZT - determines sensitivity of output voltage to load current changes. |
| Max Reverse Leakage (IR) | 0.5 μA at 29.7 V - ensures minimal standby power loss in high-impedance bias networks. |
| Max Zener Current (IZM) | 170 mA - maximum continuous DC current before thermal runaway; requires heatsinking above 1.47 W. |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ at 10% and 50% of IZM; quantifies regulation linearity. |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - supports transient overvoltage clamping in surge protection circuits. |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with standard lead length (10 mm) and no dry pack required. |
Pinout & Package
Package: T-18 axial-leaded plastic case (void-free UL94V-0 epoxy), cathode indicated by band; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink during forward conduction; reference node for reverse-biased regulation | Connected to lower-potential side of circuit; must be held ≤39 V below cathode to maintain regulation. |
| Cathode (banded end) | Current source during Zener breakdown; regulated voltage output node | Connected to higher-potential side; provides stable 39 V reference when reverse-biased above VZ. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Guarantees standardized electrical behavior and mechanical interchangeability per industry specification. |
| ±5% voltage tolerance (B-equivalent) | Enables predictable regulation within ±2 V of 39 V without post-manufacture trimming. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly planning. |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-safe workstations during manual assembly. |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating and lead-free construction. |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Providing stable 39 V reference for feedback loop in 48 V telecom DC-DC converter. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output setpoint for error amplifier. Use Value: Maintains ±0.5% output regulation over line/load transients due to low ΔVZ (3.1 V) and 14 Ω ZZ. | Use Scenario: Clamping induced surges on 36 V battery input rail in automotive control module. IC Role / Device Role / Timing Role: Transient voltage suppressor diverting >170 A surge energy away from downstream regulators. Use Value: Survives 8.3 ms half-sine surges up to 170 A without degradation, validated per JEDEC test method. |
| Programmable Logic Controller Input Protection | High-Voltage Sensor Bias Network |
Use Scenario: Protecting 24 V digital input channel against accidental 48 V miswiring in PLC backplane. IC Role / Device Role / Timing Role: Overvoltage crowbar limiting input voltage to safe level for optocoupler interface. Use Value: Limits fault voltage to ≤39 V with <0.5 μA leakage at 29.7 V, preserving signal integrity during normal operation. | Use Scenario: Biasing avalanche photodiode in industrial laser distance sensor requiring stable 39 V bias. IC Role / Device Role / Timing Role: Precision DC bias source delivering low-noise, temperature-stable voltage. Use Value: Delivers <3.1 V drift across 10–50% IZM range, supporting sub-millimeter measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B | Same 39 V, ±5%, 5 W rating but non-RoHS tin-lead plating; no e3 suffix. | Not suitable for RoHS-compliant production; requires exemption documentation for EU markets. | Select 1N5366B only for legacy repair or non-RoHS environments where leaded solder is used. |
| SMBJ5366B | Surface-mount SMB package; identical electrical specs but 85 °C/W junction-to-ambient thermal resistance. | Requires PCB redesign for SMT placement; unsuitable for through-hole legacy boards. | Choose SMBJ5366B only when space-constrained layouts demand SMT integration and thermal management permits higher RθJA. |
Compared with 1N5366B and SMBJ5366B, the 1N5366E3/TR12 uniquely combines RoHS compliance, axial-leaded T-18 packaging, and 25 °C/W junction-to-lead thermal resistance-making it optimal for new industrial designs requiring regulatory compliance and straightforward through-hole assembly with moderate power dissipation.
Availability
1N5366E3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable logic controller input stages requiring stable component supply and full RoHS compliance.
Supply support for 1N5366E3/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 and mixed-signal components for aerospace, defense, and industrial applications.
The 1N53xx series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge survivability, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance of the 1N5366E3/TR12?
The 1N5366E3/TR12 has a nominal Zener voltage of 39 V with ±5% tolerance, consistent with the B-suffix variant in the 1N53xx family. This means the actual measured VZ falls between 37.05 V and 40.95 V at 30 mA test current and 25 °C lead temperature, as confirmed in Microsemi's REV D datasheet.
Does the 1N5366E3/TR12 require dry packing before PCB assembly?
No, the 1N5366E3/TR12 does not require dry packing because it carries IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 classification. Its void-free epoxy encapsulation prevents moisture absorption, eliminating floor-life restrictions and bake requirements prior to reflow or wave soldering.
What is the maximum steady-state power dissipation for the 1N5366E3/TR12 on a standard FR4 board?
When mounted on an FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N5366E3/TR12 delivers 1.47 W steady-state power at 25 °C ambient. This is derived from its 85 °C/W junction-to-ambient thermal resistance and 5 W rating-exceeding this requires external heatsinking or reduced ambient temperature.
How is polarity marked on the 1N5366E3/TR12?
The 1N5366E3/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be connected to the higher-potential node in reverse-bias regulation mode. During forward conduction, the anode (unbanded end) is positive relative to the cathode, with VF ≤ 1.2 V at 1.0 A.
What surge current rating does the 1N5366E3/TR12 support?
The 1N5366E3/TR12 supports a peak non-recurrent surge current (IZSM) of 170 A for an 8.3 ms half-sine waveform, as specified in Microsemi's datasheet. This enables reliable transient suppression in industrial power rails without device failure under defined surge conditions.
1N5366E3/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):
- 39 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 28.1 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
1N5366E3/TR12 FAQ
1.How can I place an order for 1N5366E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366E3/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 1N5366E3/TR12 reliable?
The price and inventory of 1N5366E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5366E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366E3/TR12 transactions.
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4.How is shipping managed for 1N5366E3/TR12?
1N5366E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366E3/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 1N5366E3/TR12?
For technical support, including 1N5366E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366E3/TR12 requirements.
6.How does Aetrix verify that 1N5366E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5366E3/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 1N5366E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5366E3/TR12?
All 1N5366E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366E3/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 1N5366E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5366E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366E3/TR12 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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