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Microchip Technology 1N5365A/TR8
- Part No.:
- 1N5365A/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365A/TR8.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:6,727
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Product details
Overview
1N5365A/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 36 V, ±10% tolerance (A suffix), 30 mA test current (IZT), 11 Ω dynamic impedance (ZZ), and maximum reverse current of 0.5 μA at 25.9 V (VR). It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in DC power supplies.
For engineers reviewing the 1N5365A/TR8 datasheet, 1N5365A/TR8 pinout, 1N5365A/TR8 application, or 1N5365A/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (25 °C/W junction-to-lead), surge current rating (160 A), voltage regulation (ΔVZ = 3.3 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device functions as a shunt voltage regulator by maintaining a stable reverse-biased breakdown voltage across its terminals under varying load and line conditions. Its low dynamic impedance (11 Ω) and tight voltage regulation (ΔVZ = 3.3 V) ensure minimal output variation between 10% and 50% of IZM.
The 1N5365A/TR8 uses a void-free thermosetting epoxy T-18 package with cathode band marking and is rated for 5 W steady-state dissipation at 25 °C lead temperature (3/8″ from body), derating linearly above that point per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, ±10% tolerance - defines regulation setpoint with worst-case range 32.4–39.6 V |
| Test Current (IZT) | 30 mA - operating point where VZ and ZZ are specified; design must bias near this for datasheet accuracy |
| Dynamic Impedance (ZZ) | 11 Ω - low AC resistance ensures stable regulation under small-signal current variations |
| Max Reverse Current (IR) | 0.5 μA at VR = 25.9 V - confirms sharp knee and low leakage below breakdown |
| Max Regulator Current (IZM) | 160 mA - maximum DC current at which 5 W power limit is maintained with adequate heat sinking |
| Surge Current (IZSM) | 160 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Voltage Regulation (ΔVZ) | 3.3 V - difference between VZ measured at 10% and 50% of IZM; quantifies regulation linearity |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-204AL; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with annealed matte tin (RoHS compliant); weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt configuration | Connected to system ground or lower-potential rail; carries full load current when regulating |
| Cathode | Zener breakdown terminal / Regulated output node | Banded end; connected to supply rail being regulated; maintains 36 V relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, marking, and reliability testing across manufacturers |
| Moisture sensitivity Level 1 | No dry pack required before PCB assembly - simplifies handling and reduces BOM prep time |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during manual assembly or rework |
| Thermal resistance: 25 °C/W (junction-to-lead) | Enables 5 W operation with minimal heatsinking when leads are mounted ≥10 mm from body |
| RoHS compliant (e3 suffix) | Meets global environmental compliance requirements without performance trade-offs |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 48 V DC bus in telecom power modules where ±5% output tolerance is acceptable. IC Role / Device Role / Timing Role: Shunt regulator providing fixed 36 V reference to error amplifier feedback network. Use Value: Maintains output within spec despite input ripple and load transients due to low ΔVZ (3.3 V) and 11 Ω ZZ. | Use Scenario: Clamping induced surges on industrial sensor signal lines exposed to 24 V supply rails. IC Role / Device Role / Timing Role: Transient voltage suppressor diverting >36 V spikes to ground before reaching downstream op-amps. Use Value: Withstands 160 A surge (8.3 ms) without degradation, preserving signal integrity during EFT events. |
| Programmable Voltage Reference | Field-Replaceable Calibration Standard |
Use Scenario: Setting precise gain in programmable gain instrumentation amplifiers via resistor-divider + Zener bias. IC Role / Device Role / Timing Role: Stable 36 V reference source enabling accurate scaling of analog measurement ranges. Use Value: ±10% tolerance and low temperature coefficient support calibration traceability to ±0.5% system-level accuracy. | Use Scenario: Modular test equipment requiring field-swappable reference components with known aging behavior. IC Role / Device Role / Timing Role: Replaceable 36 V Zener module in metrology-grade calibrators with documented long-term drift. Use Value: Moisture Level 1 packaging and MIL-PRF-19500 screening options (e.g., JANTXV) enable reliable field replacement without requalification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B/TR8 | ±5% tolerance (vs. ±10% for 1N5365A/TR8); identical VZ, IZT, ZZ, and package | Higher precision needed in feedback loops where tighter regulation spread is critical | Select 1N5365B/TR8 when system-level voltage stability requires <±5% variation across temperature and life |
| MMBZ5245B-TP | Surface-mount SOD-123 package; 36 V, ±5%; 225 mW rating (vs. 5 W); higher ZZ (35 Ω) | Space-constrained PCBs where thermal mass and power handling are secondary to footprint | Choose MMBZ5245B-TP only for low-power signal-level referencing - not for 5 W regulation or surge suppression |
Compared with 1N5365B/TR8 and MMBZ5245B-TP, the 1N5365A/TR8 offers optimal balance of cost, axial-lead serviceability, and 5 W power handling for industrial power supply designs where ±10% tolerance is sufficient and board-level surge immunity is required.
Availability
1N5365A/TR8 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply and long-lifecycle support.
Supply support for 1N5365A/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 1N53xx series was designed for ruggedized voltage regulation in harsh-environment power systems, emphasizing thermal robustness, surge resilience, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance for 1N5365A/TR8?
The "A" suffix in 1N5365A/TR8 specifies a ±10% Zener voltage tolerance. At nominal 36 V, this yields a guaranteed regulation range of 32.4 V to 39.6 V at 25 °C lead temperature. This tolerance applies across the full operating temperature range (–65 °C to +150 °C), with datasheet-specified temperature coefficients factored into worst-case design margins. The 1N5365A/TR8 achieves this while maintaining 11 Ω dynamic impedance and 3.3 V voltage regulation (ΔVZ).
Can 1N5365A/TR8 be used in surface-mount designs?
No - the 1N5365A/TR8 is an axial-leaded T-18 package and is not compatible with SMT reflow processes. For surface-mount equivalents, Microsemi offers the SMBJ5365B (DO-214AA) and SMBG5365B (DO-214AB) variants. These share the same 36 V Zener voltage and ±10% tolerance but differ in thermal resistance (≈60 °C/W vs. 25 °C/W for 1N5365A/TR8) and surge rating. The 1N5365A/TR8 requires through-hole mounting with ≥10 mm lead length from body for full 5 W rating.
What is the maximum steady-state power dissipation for 1N5365A/TR8?
The 1N5365A/TR8 is rated for 5.0 W steady-state power dissipation at TL = 25 °C (measured 3/8″ or 10 mm from body). When mounted on FR4 with 1 oz copper, its derated power drops to 1.47 W at TA = 25 °C due to higher junction-to-ambient thermal resistance (85 °C/W). Derating follows the curve in Figure 1: power decreases linearly to zero at +150 °C ambient. The 1N5365A/TR8 must be heat-sunk accordingly to avoid exceeding junction temperature limits.
How does the surge current rating of 1N5365A/TR8 compare to its DC rating?
The 1N5365A/TR8 has a maximum DC Zener current (IZM) of 160 mA (at 36 V, 5 W), but its non-recurrent surge current (IZSM) is 160 A for an 8.3 ms half-sine waveform. This 1000× surge-to-DC ratio enables the 1N5365A/TR8 to absorb transient overvoltages - such as inductive kickback or lightning-induced surges - without failure, while maintaining stable 36 V regulation during normal operation. Surge capability is validated per JEDEC standards and is intrinsic to the T-18 package construction.
Is 1N5365A/TR8 RoHS compliant?
Yes - the "e3" designation in the full part number (1N5365A/TR8 e3) confirms RoHS compliance. The 1N5365A/TR8 uses annealed matte-tin plating on leads per MIL-STD-750 Method 2026 and void-free UL94V-0 epoxy encapsulation, both free of lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. Compliance is verified per EU Directive 2011/65/EU and applies to all manufacturing lots shipped after 2008 REV D.
1N5365A/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):
- 36 V
- Tolerance:
- ±10%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 25.9 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
1N5365A/TR8 FAQ
1.How can I place an order for 1N5365A/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365A/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 1N5365A/TR8 reliable?
The price and inventory of 1N5365A/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365A/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5365A/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365A/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365A/TR8?
1N5365A/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365A/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 1N5365A/TR8?
For technical support, including 1N5365A/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365A/TR8 requirements.
6.How does Aetrix verify that 1N5365A/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5365A/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 1N5365A/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5365A/TR8?
All 1N5365A/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365A/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 1N5365A/TR8 part is unused and in its original packaging.
Return procedure for 1N5365A/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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