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Microchip Technology 1N5365B/TR8
- Part No.:
- 1N5365B/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5365B/TR8.pdf
- Description:
- DIODE ZENER 36V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,151
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Product details
Overview
1N5365B/TR8 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 36 V, ±5% tolerance (B suffix), 30 mA test current, 11 Ω dynamic impedance at 30 mA, and maximum reverse leakage of 0.5 µA at 27.4 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 1N5365B/TR8 datasheet, 1N5365B/TR8 pinout, 1N5365B/TR8 application, or 1N5365B/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (160 A), voltage regulation (ΔVZ = 3.3 V), and RoHS-compliant e3 marking compatibility.
Technical Context
This device functions as a two-terminal voltage regulator operating in reverse breakdown mode. Its Zener voltage is specified at 36 V ±5% under 30 mA DC test current at 25°C lead temperature, with dynamic impedance measured at 1 kHz AC superimposed on DC bias.
Thermal design relies on junction-to-lead thermal resistance of 25 °C/W (3/8" lead length), enabling stable 5 W dissipation at TL ≤ 25°C. Reverse leakage is guaranteed ≤0.5 µA at VR = 27.4 V, and surge capability is rated at 160 A (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - precise regulation point for feedback loops and reference circuits |
| Test Current (IZT) | 30 mA - standardized bias condition for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 11 Ω at 30 mA - low AC resistance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage (IR) | 0.5 µA at 27.4 V - guarantees low standby power loss in high-impedance bias networks |
| Max Regulator Current (IZM) | 160 mA - maximum continuous DC current before exceeding 5 W power limit at TL = 25°C |
| Voltage Regulation (ΔVZ) | 3.3 V - difference between VZ at 10% and 50% of IZM, indicating regulation linearity |
| Surge Current (IZSM) | 160 A (8.3 ms half-sine) - withstands transient overvoltage events without failure |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal management via PCB copper or heatsink attachment to leads |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free transfer-molded thermosetting epoxy, UL94V-0 rated); cathode indicated by band; RoHS-compliant matte-tin plating; weight 0.7 g; moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for reverse-bias operation | Connected to lower-potential side of regulated circuit; forms return path for Zener current |
| Cathode (banded end) | Regulated output node | Connected to higher-potential side; delivers stable 36 V reference when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard axial package (T-18) with documented thermal and electrical behavior |
| ±5% voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants in feedback networks |
| Low dynamic impedance (11 Ω) | Minimizes output voltage deviation during current changes in shunt regulator topologies |
| High surge current rating (160 A) | Provides robust transient suppression without external TVS devices in cost-sensitive designs |
| RoHS-compliant e3 marking | Meets environmental compliance requirements without sacrificing electrical performance or reliability |
Applications
| Industrial Power Supply Reference | Overvoltage Clamp in DC-DC Converters |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback converters operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Shunt voltage reference connected across optocoupler input to maintain tight output regulation. Use Value: 36 V Zener voltage sets precise error amplifier threshold; ±5% tolerance ensures <±2% output variation over line/load/temperature. | Use Scenario: Protecting MOSFET gate drivers from inductive kickback in 24 V automotive body control modules. IC Role / Device Role / Timing Role: Clamping transient spikes above 36 V to prevent gate oxide damage. Use Value: 160 A surge rating absorbs 8.3 ms transients without degradation; 0.5 µA leakage avoids false triggering in high-impedance sensing paths. |
| Programmable Voltage Monitor Threshold | Temperature-Stable Bias Network |
Use Scenario: Setting trip point for undervoltage lockout (UVLO) in battery-powered instrumentation with wide temperature range. IC Role / Device Role / Timing Role: Providing fixed reference to comparator input in discrete UVLO circuit. Use Value: Low ΔVZ (3.3 V) ensures consistent trip point across 16–80 mA operating current; 25 °C/W RθJL allows direct lead-mount thermal coupling to chassis ground. | Use Scenario: Generating stable bias current for op-amp input stages in analog sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Acting as temperature-compensated current source via constant-voltage drop across series resistor. Use Value: 11 Ω ZZ minimizes current drift with load variation; –65°C to +150°C operating range supports extended industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B (bulk) | Identical electrical specs; differs only in packaging (bulk vs. tape-and-reel TR8) | No functional difference; TR8 enables automated SMT placement; bulk requires manual or axial insertion | Select 1N5365B/TR8 for pick-and-place assembly; choose bulk for prototyping or low-volume hand-soldered builds |
| MMSZ5245B-TP (Micro Commercial) | 36 V ±5%, but 500 mW rating (vs. 5 W); SOD-123 surface-mount package; ZZ = 20 Ω at 20 mA | Not suitable for high-power shunt regulation; limited to low-current bias/reference roles due to power derating | Use MMSZ5245B-TP only where space constraints prohibit axial leads and power dissipation ≤0.5 W |
Compared with 1N5365B/TR8, the bulk variant offers identical performance with different logistics handling, while MMSZ5245B-TP trades 10× lower power capability and higher impedance for surface-mount compatibility-making it unsuitable for high-current regulation but viable for compact low-power references.
Availability
1N5365B/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and programmable voltage monitors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5365B/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W axial Zener regulation in harsh-environment power systems where thermal stability, surge immunity, and JEDEC-standard mechanical reliability are critical.
FAQ
What is the Zener voltage tolerance of the 1N5365B/TR8?
The 1N5365B/TR8 has a Zener voltage tolerance of ±5%, as indicated by the "B" suffix per Microsemi's documentation. This means its nominal 36 V regulation point falls within 34.2 V to 37.8 V at 30 mA test current and 25°C lead temperature. The tolerance is guaranteed across the full operating temperature range and is verified per JEDEC test methods.
Can the 1N5365B/TR8 be used in surface-mount designs?
No, the 1N5365B/TR8 is an axial-leaded T-18 package and is not compatible with surface-mount assembly. Microsemi offers surface-mount equivalents such as SMBJ5365B for SMC packages or SMBG5365B for SMB packages, but the 1N5365B/TR8 requires through-hole or axial mounting with 3/8" lead length for thermal derating compliance.
What is the maximum power dissipation of the 1N5365B/TR8 at 75°C lead temperature?
Per the derating curve in Microsemi's datasheet, the 1N5365B/TR8 dissipates 5.0 W at TL = 25°C, with linear derating at 20 mW/°C above that. At 75°C lead temperature, power dissipation is reduced to 4.0 W (5.0 W – (75 – 25) × 0.02 W). Exceeding this risks thermal runaway or parametric shift beyond specification limits.
Does the 1N5365B/TR8 meet RoHS requirements?
Yes, the 1N5365B/TR8 carries the "e3" suffix per Microsemi's documentation, confirming RoHS compliance with lead-free matte-tin plating and halogen-free epoxy encapsulation. It satisfies EU Directive 2011/65/EU and related amendments without exemptions, and no dry pack is required due to moisture sensitivity level 1 classification.
How is polarity marked on the 1N5365B/TR8?
The 1N5365B/TR8 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. During forward conduction, the forward voltage is ≤1.2 V at 1.0 A, but the device is intended for reverse-bias regulation-not rectification.
1N5365B/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:
- ±5%
- 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
1N5365B/TR8 FAQ
1.How can I place an order for 1N5365B/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5365B/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 1N5365B/TR8 reliable?
The price and inventory of 1N5365B/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5365B/TR8 is usually 5 days.
3.What payment methods are accepted for 1N5365B/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5365B/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5365B/TR8?
1N5365B/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5365B/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 1N5365B/TR8?
For technical support, including 1N5365B/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5365B/TR8 requirements.
6.How does Aetrix verify that 1N5365B/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N5365B/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 1N5365B/TR8 meets industry standards.
7.What is the process for return or replacement of 1N5365B/TR8?
All 1N5365B/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5365B/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 1N5365B/TR8 part is unused and in its original packaging.
Return procedure for 1N5365B/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5365B/TR8 Tags
-
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
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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