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Microchip Technology 1N5373BE3/TR13
- Part No.:
- 1N5373BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5373BE3/TR13.pdf
- Description:
- DIODE ZENER 68V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,335
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Product details
Overview
1N5373BE3/TR13 from Microsemi is a 5 W, 68 V ±5% axial-leaded silicon Zener diode optimized for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers 20 mA test current, 44 Ω dynamic impedance at IZT, and maintains stable regulation across -65°C to +150°C operating temperature.
For engineers reviewing the 1N5373BE3/TR13 datasheet, 1N5373BE3/TR13 pinout, 1N5373BE3/TR13 application, or 1N5373BE3/TR13 equivalent, key selection criteria include its 68 V nominal Zener voltage, ±5% tolerance (B suffix), RoHS-compliant matte-tin plating, T-18 axial package, and 5.0 W steady-state power rating at TL < 25°C with 3/8" lead length.
Technical Context
This device operates as a reverse-biased voltage reference with specified Zener voltage (VZ = 68 V) measured at 20 mA (IZT), exhibiting 44 Ω dynamic impedance (ZZ) and 2.0 V maximum voltage regulation (ΔVZ) between 10% and 50% of IZM. Its thermal resistance is 25 °C/W junction-to-lead at 3/8" lead length.
The 1N5373BE3/TR13 features cathode band polarity marking, moisture sensitivity level 1 per J-STD-020B (no dry pack required), and withstands 500 A non-recurrent 8.3 ms half-sine surge current (IZSM). It is rated for 1.2 V maximum forward voltage at 1.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% - precise reference voltage at 20 mA test current for stable regulation in feedback networks |
| Power Dissipation | 5.0 W at TL < 25°C with 3/8" lead length - supports high-current regulation when adequately heat sunk |
| Dynamic Impedance (ZZ) | 44 Ω at IZT = 20 mA - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 0.5 μA at VR = 51.7 V - ultra-low leakage preserves accuracy in high-impedance bias/reference paths |
| Surge Current (IZSM) | 500 A peak, 8.3 ms half-sine - robust transient suppression capability for input-stage clamping |
| Thermal Resistance | 25 °C/W junction-to-lead - enables predictable thermal design with standard axial mounting and lead heatsinking |
| Operating Temperature | -65°C to +150°C - qualified for industrial, automotive, and aerospace environments without derating |
Pinout & Package
Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-41 outline; void-free UL94V-0 epoxy body; cathode indicated by band; RoHS-compliant annealed matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential node; forms reference return path in shunt regulator topologies |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; supplies stable 68 V reference to error amplifier or protection comparator |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized mechanical dimensions, electrical behavior, and interchangeability across qualified suppliers |
| ±5% voltage tolerance (B suffix) | Guarantees VZ within 64.6–71.4 V range at 20 mA, enabling tighter feedback loop control vs. ±10% or ±20% variants |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with lead-free matte-tin plating and halogen-free epoxy, supporting green manufacturing |
| Level 1 moisture sensitivity | No dry pack or baking required before PCB assembly-reduces handling cost and avoids moisture-induced popcorning |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables safe handling in standard production environments without special ESD controls |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 68 V threshold to TL431-like error amplifier or discrete comparator. Use Value: Maintains ±1% output regulation across line/load/temperature with 44 Ω dynamic impedance minimizing feedback error. |
Use Scenario: Clamping transient surges on DC bus lines in motor drives or telecom power systems. IC Role / Device Role / Timing Role: Passive crowbar element absorbing energy during 500 A 8.3 ms surges without failure. Use Value: Prevents downstream IC damage by limiting voltage to ≤71.4 V (VZ max) during fast transients. |
| Precision Reference Generator | Industrial Sensor Excitation |
Use Scenario: Generating stable excitation voltage for bridge-based pressure or strain sensors in process instrumentation. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source referenced to system ground with minimal ΔVZ drift. Use Value: Enables 16-bit ADC resolution by holding reference stability to within 2.0 V over full IZM range. |
Use Scenario: Biasing RTD or thermistor measurement circuits requiring stable excitation in harsh factory environments. IC Role / Device Role / Timing Role: Temperature-stable shunt regulator maintaining constant current through sensing element. Use Value: Delivers consistent 68 V excitation across -65°C to +150°C, reducing thermal offset errors in analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B (non-e3, tape-and-reel) | Identical electrical specs and T-18 package; lacks RoHS-compliant e3 plating and TR13 tape/reel packaging | Suitable for legacy non-RoHS designs or where matte-tin plating is not required | Select 1N5373BE3/TR13 for new RoHS-compliant production; use 1N5373B only if exempt from lead-free requirements |
| MMSZ5259ET1G (ON Semiconductor) | Surface-mount SOD-123, 68 V ±5%, 500 mW - 10× lower power rating, higher ZZ (100 Ω), different thermal profile | Limited to low-power signal-level references; unsuitable for 5 W regulation or surge clamping | Choose MMSZ5259ET1G only for space-constrained PCBs where power dissipation ≤0.5 W is acceptable |
Compared with 1N5373B and MMSZ5259ET1G, the 1N5373BE3/TR13 uniquely combines 5 W power handling, axial T-18 mountability, RoHS compliance, and 500 A surge capability-making it irreplaceable for high-reliability industrial power regulation where surface-mount alternatives lack thermal mass and leaded alternatives lack environmental compliance.
Availability
1N5373BE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and precision reference generators requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5373BE3/TR13 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 timing solutions for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W Zener regulation in mission-critical power systems-emphasizing wide temperature operation, surge resilience, and JEDEC-standardized mechanical reliability.
FAQ
What is the Zener voltage tolerance of the 1N5373BE3/TR13?
The 1N5373BE3/TR13 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's documentation. This means its nominal 68 V Zener voltage is guaranteed between 64.6 V and 71.4 V when tested at 20 mA and 25°C. The e3 suffix indicates RoHS compliance but does not affect voltage tolerance.
Does the 1N5373BE3/TR13 require dry packing before PCB assembly?
No, the 1N5373BE3/TR13 has moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored and assembled without dry pack or baking. Its void-free UL94V-0 epoxy body and Level 1 classification eliminate moisture-related popcorning risk during reflow soldering.
What is the maximum surge current rating for the 1N5373BE3/TR13?
The 1N5373BE3/TR13 is rated for 500 A peak non-recurrent surge current (IZSM), defined as a single 8.3 ms half-sine waveform. This rating is validated per Microsemi's datasheet and reflects its capability to absorb transient energy in DC bus clamping applications without parametric shift or failure.
Can the 1N5373BE3/TR13 be used as a direct replacement for the 1N5373B?
Yes-the 1N5373BE3/TR13 is electrically and mechanically identical to the 1N5373B except for RoHS-compliant matte-tin plating (e3) and tape-and-reel packaging (TR13). No PCB layout or schematic changes are needed; it functions identically in all circuits where the 1N5373B was specified.
What is the thermal resistance specification for the 1N5373BE3/TR13?
The 1N5373BE3/TR13 has a thermal resistance of 25 °C/W junction-to-lead when measured at 3/8" (10 mm) lead length from the body. This value enables accurate junction temperature calculation under load and confirms suitability for high-current regulation when leads are used as heat paths.
1N5373BE3/TR13 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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 44 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 49 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
1N5373BE3/TR13 FAQ
1.How can I place an order for 1N5373BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5373BE3/TR13 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 1N5373BE3/TR13 reliable?
The price and inventory of 1N5373BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5373BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5373BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5373BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5373BE3/TR13?
1N5373BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5373BE3/TR13 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 1N5373BE3/TR13?
For technical support, including 1N5373BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5373BE3/TR13 requirements.
6.How does Aetrix verify that 1N5373BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5373BE3/TR13 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 1N5373BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5373BE3/TR13?
All 1N5373BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5373BE3/TR13, 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 1N5373BE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5373BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5373BE3/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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