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Microchip Technology 1N5366/TR12
- Part No.:
- 1N5366/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5366/TR12.pdf
- Description:
- DIODE ZENER 39V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,328
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Product details
Overview
1N5366/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 39 V, ±5% tolerance (B suffix), 30 mA test current (IZT), 14 Ω dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 29.7 V (VR). 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 1N5366/TR12 datasheet, 1N5366/TR12 pinout, 1N5366/TR12 application, or 1N5366/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (170 A), voltage regulation (ΔVZ = 3.1 V), and RoHS-compliant tape-and-reel packaging (TR12).
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across wide operating current (10–30 mA) and temperature ranges. Its low dynamic impedance (14 Ω) ensures minimal voltage deviation under load transients, and its 25 °C/W thermal resistance enables reliable 5 W operation with standard lead-length heat sinking.
The 1N5366/TR12 uses a void-free thermosetting epoxy case (UL94V-0), tin-lead or matte-tin plating per MIL-STD-750 Method 2026, and cathode polarity marked by a band. It withstands 8.3 ms half-sine surge currents up to 170 A and exhibits <0.5 μA leakage at VR = 29.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% - precise regulation point for 36–42 V system references |
| Test Current (IZT) | 30 mA - defined operating point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 14 Ω - low AC resistance ensures <0.42 V deviation per 30 mA load change |
| Max Reverse Current (IR) | 0.5 μA @ 29.7 V - ultra-low leakage preserves regulation integrity in high-impedance bias networks |
| Max Regulator Current (IZM) | 170 mA - maximum DC current at TL = 25 °C with 3/8″ lead length heat sinking |
| Surge Current (IZSM) | 170 A (8.3 ms half-sine) - robust transient suppression capability for input rail clamping |
| Voltage Regulation (ΔVZ) | 3.1 V - difference between VZ measured at 10% and 50% of IZM, quantifying regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; grounded or low-side reference node in shunt regulation | Connected to circuit ground or common return; must handle 1.2 V forward drop at 1 A |
| Cathode | Regulated output node; connected to voltage rail being stabilized | Banded end; held at 39 V relative to anode; sinks all excess current above load demand |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Industry-standard 1N53xxB series ensures cross-manufacturer compatibility and design reuse |
| Moisture sensitivity Level 1 | No dry pack required - simplifies SMT handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special ESD controls needed during board assembly |
| RoHS-compliant option | e3 suffix available; TR12 packaging confirms tape-and-reel compliance for automated placement |
| High surge endurance | Rated for 170 A non-recurrent 8.3 ms half-sine surges - suitable for input-stage transient suppression |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback reference in 48 V telecom DC-DC converters where ±5% output tolerance is required. IC Role / Device Role / Timing Role: Shunt voltage reference connected to optocoupler input or error amplifier reference pin. Use Value: Maintains 39 V reference with ≤3.1 V regulation spread across 17–85 mA operating range, enabling tight output control without active compensation. |
Use Scenario: Clamping 36–42 V battery backup rails against load-dump transients in factory automation controllers. IC Role / Device Role / Timing Role: Passive crowbar element placed across rail and ground to divert surge energy. Use Value: Absorbs 170 A surges (8.3 ms) without failure, limiting rail voltage to ≤42 V and protecting downstream 40 V-rated MOSFETs and regulators. |
| Programmable Logic Controller Input Conditioning | Test Equipment Reference Source |
|
Use Scenario: Providing stable 39 V bias for isolated analog input front-ends in PLC analog I/O modules. IC Role / Device Role / Timing Role: Precision DC reference source for ADC driver stages and signal conditioning op-amps. Use Value: Delivers <0.5 μA leakage at 29.7 V, minimizing offset error in high-impedance sensor interfaces and ensuring ≥14-bit effective resolution. |
Use Scenario: Serving as calibrated voltage standard in portable multimeter calibration fixtures and benchtop reference dividers. IC Role / Device Role / Timing Role: Primary Zener reference in cascaded divider networks requiring traceable 39 V stability. Use Value: ±5% initial tolerance and <3.1 V ΔVZ support repeatable 0.1% full-scale calibration across temperature and current sweep tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5366B (bulk) | Identical electrical specs; differs only in packaging - bulk vs. tape-and-reel (TR12) | No reel-based automation support; manual or vibratory feed required | Select 1N5366/TR12 for SMT production lines; choose 1N5366B for prototyping or low-volume hand assembly |
| MMBZ5267B (SOT-23) | Same 39 V ±5%, but 0.35 W rating, 300 Ω ZZ, and surface-mount package | Limited to low-power biasing; unsuitable for >100 mA regulation or surge clamping | Use MMBZ5267B only in space-constrained, low-current applications; retain 1N5366/TR12 for 5 W power handling and surge robustness |
Compared with 1N5366B and MMBZ5267B, the 1N5366/TR12 uniquely combines JEDEC-standard axial packaging, 5 W continuous dissipation, 170 A surge rating, and tape-and-reel readiness - making it the sole choice for high-reliability industrial power regulation requiring automated assembly and transient resilience.
Availability
1N5366/TR12 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection clamping, and programmable logic controller input conditioning requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 1N5366/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 radiation-hardened components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge immunity, and JEDEC-standard interoperability across military and commercial applications.
FAQ
What is the Zener voltage tolerance of the 1N5366/TR12?
The 1N5366/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its full designation. This means its nominal 39 V regulation point falls within 37.05 V to 40.95 V at 30 mA test current and 25 °C lead temperature. The tolerance is guaranteed per JEDEC specification and applies across the full operating temperature range of –65 °C to +150 °C.
Does the 1N5366/TR12 require dry packing before PCB assembly?
No, the 1N5366/TR12 does not require dry packing. Its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1, meaning it can be stored and assembled indefinitely at ambient conditions without baking. This eliminates pre-reflow moisture removal steps and reduces manufacturing overhead for high-volume production using the 1N5366/TR12.
What is the maximum steady-state power dissipation of the 1N5366/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5366/TR12 has a steady-state power rating of 1.47 W at 25 °C ambient. This derates linearly to zero at 150 °C ambient, per the thermal resistance of 85 °C/W junction-to-ambient specified in the official Microsemi datasheet for the 1N5366/TR12.
Can the 1N5366/TR12 be used as a direct replacement for the 1N5366B?
Yes, the 1N5366/TR12 is electrically and mechanically identical to the 1N5366B, differing only in packaging format: TR12 denotes tape-and-reel delivery (EIA-296 compliant), while 1N5366B is supplied in bulk. All electrical parameters, thermal characteristics, and marking remain unchanged - the 1N5366/TR12 is a drop-in replacement for automated assembly where 1N5366B was previously used manually.
What is the reverse leakage current specification for the 1N5366/TR12?
The 1N5366/TR12 specifies a maximum reverse leakage current (IR) of 0.5 μA when tested at 29.7 V (VR = 0.76 × VZ). This value is measured at 25 °C and reflects the device's ability to maintain regulation integrity in high-impedance bias networks. Leakage remains below 1.0 μA across the full –65 °C to +150 °C operating range per Microsemi's characterization data for the 1N5366/TR12.
1N5366/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
1N5366/TR12 FAQ
1.How can I place an order for 1N5366/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5366/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 1N5366/TR12 reliable?
The price and inventory of 1N5366/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5366/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5366/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5366/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5366/TR12?
1N5366/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5366/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 1N5366/TR12?
For technical support, including 1N5366/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5366/TR12 requirements.
6.How does Aetrix verify that 1N5366/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5366/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 1N5366/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5366/TR12?
All 1N5366/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5366/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 1N5366/TR12 part is unused and in its original packaging.
Return procedure for 1N5366/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5366/TR12 Tags
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