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Microchip Technology 1N5367E3/TR12
- Part No.:
- 1N5367E3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5367E3/TR12.pdf
- Description:
- DIODE ZENER 43V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,634
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Product details
Overview
1N5367E3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 43 V, ±5% tolerance (B-suffix equivalent), 30 mA test current, 20 Ω maximum dynamic impedance at IZT, and 190 mA maximum Zener current (IZM) when adequately heat-sunk. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N5367E3/TR12 datasheet, 1N5367E3/TR12 pinout, 1N5367E3/TR12 application, or 1N5367E3/TR12 equivalent, key selection criteria include its 43 V regulation point, 5 W steady-state power rating at TL = 25°C, low 2.8 V voltage regulation (ΔVZ), RoHS-compliant matte-tin plating, and T-18 axial package compatibility with manual or wave soldering per MIL-STD-750.
Technical Context
This discrete Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across variable load or line conditions. Its design centers on thermal management-junction-to-lead thermal resistance is 25 °C/W at 10 mm lead length-enabling reliable 5 W dissipation with proper heatsinking.
It exhibits minimal voltage drift versus current: ΔVZ = 2.8 V between 10% and 50% of IZM, and maintains tight regulation with ZZ ≤ 20 Ω at 30 mA. The cathode band marking and polarity-sensitive operation require the banded end to be held positive relative to the anode for correct regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal, ±5% tolerance - defines precise regulation setpoint for feedback or clamp circuits |
| Test Current (IZT) | 30 mA - operating point where VZ and ZZ are specified; used for calibration and stability verification |
| Max Dynamic Impedance (ZZ) | 20 Ω at IZT - determines output voltage ripple sensitivity under varying load current |
| Max Zener Current (IZM) | 190 mA - maximum continuous reverse current before thermal runaway; requires heatsinking above ~1.47 W on PCB |
| Voltage Regulation (ΔVZ) | 2.8 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
| Power Dissipation (PD) | 5.0 W at TL = 25°C - defines absolute thermal limit with 3/8″ lead length; derates linearly above 25°C |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal modeling for board-level heatsink design and reliability prediction |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL, void-free UL94V-0 epoxy body, 0.7 g weight, cathode indicated by color band. Leads are annealed matte-tin plated (RoHS compliant per e3 suffix) and solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference node for reverse bias | Connected to circuit ground or lower potential; must be negative relative to cathode during regulation |
| Cathode (banded end) | Zener breakdown terminal | Connected to regulated voltage rail; polarity reversal prevents conduction and regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and thermal behavior across 3.3–200 V variants |
| Moisture Sensitivity Level 1 | No dry pack required prior to assembly-reduces handling cost and avoids moisture-related popcorning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| High surge current rating (IZSM = 190 A) | Withstands 8.3 ms half-sine transients-suitable for input-stage overvoltage clamping in AC/DC supplies |
| Stable regulation over -65°C to +150°C | Validated operation across full military temperature range without parameter drift compensation |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Precision voltage reference in linear regulator feedback loop or isolated DC-DC converter error amplifier. IC Role / Device Role / Timing Role: Zener diode providing stable 43 V reference against which output voltage is compared. Use Value: Delivers ±5% regulation accuracy and <2.8 V ΔVZ across 30–95 mA load variation, enabling <1% output voltage tolerance. | Use Scenario: Transient voltage suppression at input stage of 48 V telecom power system exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Shunt clamp that conducts excess energy to ground when input exceeds 43 V. Use Value: Absorbs up to 190 A surge (8.3 ms) without failure and maintains clamping voltage within 43 V ±5%, protecting downstream MOSFETs and controllers. |
| Programmable Current Source Bias | Temperature-Stable Sensor Excitation |
Use Scenario: Fixed-voltage bias for constant-current generator using op-amp and pass transistor in analog sensor signal conditioning. IC Role / Device Role / Timing Role: Provides stable 43 V rail to set emitter-base voltage differential and define current magnitude. Use Value: Enables <0.5% current drift over -40°C to +85°C due to low thermal coefficient and 25 °C/W RθJL. | Use Scenario: Excitation source for high-impedance resistive temperature detector (RTD) bridge requiring stable voltage under varying ambient conditions. IC Role / Device Role / Timing Role: Zener-regulated excitation voltage applied across RTD element to generate proportional measurement signal. Use Value: Maintains excitation accuracy within ±0.2% over -65°C to +150°C, directly improving RTD measurement resolution and repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5367B | Same 43 V, ±5% VZ, but SnPb lead finish (non-RoHS); identical electrical specs and T-18 package | No change in circuit function or layout; differs only in compliance and soldering profile (260°C/10 s vs. Pb-free reflow) | Select 1N5367B if legacy SnPb assembly or MIL-PRF-19500 screening (e.g., JANTXV-1N5367B) is required |
| SMBJ5367B | Surface-mount SMB package (JEDEC DO-214AA); same 43 V, ±5%, but lower IZM = 170 mA and higher ZZ = 22 Ω | Requires PCB redesign; suited for automated SMT lines but not drop-in replacement for through-hole designs | Select SMBJ5367B only when space-constrained layouts or high-volume pick-and-place manufacturing drive package choice |
Compared with 1N5367B and SMBJ5367B, the 1N5367E3/TR12 uniquely combines RoHS compliance, axial T-18 form factor, 190 mA IZM, and 20 Ω ZZ-making it optimal for through-hole industrial power supplies needing environmental compliance without sacrificing regulation performance or surge robustness.
Availability
1N5367E3/TR12 is available at Aetrix Electronics and suitable for industrial power supply reference, overvoltage protection clamp, and programmable current source bias applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5367E3/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 robustness, surge immunity, and extended temperature operation without derating penalties.
FAQ
What is the Zener voltage tolerance of the 1N5367E3/TR12?
The 1N5367E3/TR12 has a nominal Zener voltage of 43 V with ±5% tolerance, consistent with the "B" suffix designation in the 1N53xx family. This tolerance is verified per JEDEC registration and applies across the full operating temperature range of –65°C to +150°C, ensuring predictable regulation in industrial and automotive environments where 1N5367E3/TR12 is deployed.
Does the 1N5367E3/TR12 require a dry pack before soldering?
No, the 1N5367E3/TR12 has Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it is exempt from dry pack requirements. Its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating allow direct use from reel without baking-reducing manufacturing overhead and eliminating moisture-related defects during wave or hand soldering of 1N5367E3/TR12.
What is the maximum surge current rating for the 1N5367E3/TR12?
The 1N5367E3/TR12 is rated for a maximum non-recurrent surge current (IZSM) of 190 A, defined as the peak of an 8.3 ms half-sine waveform. This rating reflects its capability to absorb transient energy in overvoltage protection circuits without degradation, making 1N5367E3/TR12 suitable for clamping applications in telecom and industrial power inputs where lightning or switching surges occur.
How does thermal resistance affect the 1N5367E3/TR12's power handling on a PCB?
The 1N5367E3/TR12 has a junction-to-lead thermal resistance (RθJL) of 25 °C/W at 10 mm lead length, but junction-to-ambient resistance rises to 85 °C/W on FR4 with standard copper pads. As a result, its usable power drops from 5.0 W at TL = 25°C to 1.47 W at TA = 25°C-so effective heatsinking via lead termination or external copper pours is essential to sustain full 1N5367E3/TR12 performance.
Is the 1N5367E3/TR12 compatible with lead-free soldering processes?
Yes, the 1N5367E3/TR12 features RoHS-compliant annealed matte-tin plating and is qualified for lead-free soldering at 260°C for 10 seconds per MIL-STD-750 Method 2026. Its e3 suffix explicitly denotes this compliance, confirming that 1N5367E3/TR12 meets JEDEC J-STD-020 moisture and thermal stress requirements for modern Pb-free reflow and wave soldering profiles.
1N5367E3/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):
- 43 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 31 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
1N5367E3/TR12 FAQ
1.How can I place an order for 1N5367E3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5367E3/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 1N5367E3/TR12 reliable?
The price and inventory of 1N5367E3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5367E3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5367E3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5367E3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5367E3/TR12?
1N5367E3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5367E3/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 1N5367E3/TR12?
For technical support, including 1N5367E3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5367E3/TR12 requirements.
6.How does Aetrix verify that 1N5367E3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5367E3/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 1N5367E3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5367E3/TR12?
All 1N5367E3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5367E3/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 1N5367E3/TR12 part is unused and in its original packaging.
Return procedure for 1N5367E3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5367E3/TR12 Tags
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