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Microchip Technology 1N5373E3/TR13
- Part No.:
- 1N5373E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5373E3/TR13.pdf
- Description:
- DIODE ZENER 68V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:5,362
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Product details
Overview
1N5373E3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 68 V, ±5% tolerance (B-suffix equivalent), 20 mA test current, 44 Ω dynamic impedance at IZT, and 0.5 μA maximum reverse leakage at 51.7 V. It delivers stable voltage reference in power supply feedback loops and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N5373E3/TR13 datasheet, 1N5373E3/TR13 pinout, 1N5373E3/TR13 application, or 1N5373E3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (500 A), voltage regulation ΔVZ (2.0 V), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This device operates as a two-terminal voltage reference, conducting in reverse breakdown to clamp voltage across its terminals. Its 68 V nominal Zener voltage is specified at 20 mA DC test current (IZT) with 44 Ω dynamic impedance (ZZ) measured at 1 kHz AC superimposed on IZT.
Thermal design relies on low junction-to-lead thermal resistance (25 °C/W at 10 mm lead length), enabling 5 W steady-state dissipation at TL < 25 °C. Reverse leakage remains ≤0.5 μA up to 51.7 V (75% of VZ), supporting stable regulation under light-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V nominal, ±5% tolerance - defines precise clamping threshold for overvoltage protection and reference circuits |
| Test Current (IZT) | 20 mA DC - operating point where VZ and ZZ are guaranteed; sets minimum bias for stable regulation |
| Dynamic Impedance (ZZ) | 44 Ω at IZT - determines output voltage variation under load changes; lower value improves regulation fidelity |
| Max Reverse Leakage (IR) | 0.5 μA at 51.7 V - ensures minimal standby current in high-impedance sensing or battery-backed systems |
| Max Regulator Current (IZM) | 500 mA - maximum continuous reverse current before thermal runaway; requires heat sinking above ~1.47 W on PCB |
| Surge Current (IZSM) | 500 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure in surge-prone environments |
| Voltage Regulation (ΔVZ) | 2.0 V - difference between VZ measured at 10% and 50% of IZM; quantifies line regulation performance |
Pinout & Package
Package: T-18 axial-leaded plastic case (Void-free transfer molded thermosetting epoxy, UL94V-0 rated), cathode indicated by band, weight 0.7 g, moisture sensitivity Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node; forward voltage ≤1.2 V @ 1.0 A enables use in polarity protection |
| Cathode | Zener breakdown terminal | Banded end; connected to higher-potential node during regulation; defines 68 V reference relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB family mechanical and electrical definitions for interchangeability |
| RoHS-compliant plating | Matte-tin terminations meet RoHS Directive 2011/65/EU and solderable per MIL-STD-750 Method 2026 |
| Low thermal resistance | 25 °C/W junction-to-lead enables full 5 W dissipation with simple lead-length heat sinking (10 mm) |
| ESD robustness | Nonsensitive to ESD per MIL-STD-750 Method 1020 - no special handling required in assembly |
| High surge capability | Rated for 500 A non-recurrent 8.3 ms half-sine surge - suitable for telecom and industrial transient suppression |
Applications
| Switch-Mode Power Supply Feedback | Industrial Overvoltage Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference providing precise 68 V threshold to drive TL431-like shunt regulator or direct optocoupler LED bias. Use Value: Tight ±5% tolerance and low ΔVZ (2.0 V) ensure output regulation within ±1.5% over line/load/temperature. | Use Scenario: Placed across DC bus in motor drives or PLC I/O modules to limit voltage spikes during inductive switching. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing energy from L·di/dt transients before reaching sensitive logic or gate drivers. Use Value: 500 A surge rating and 5 W steady-state dissipation enable reliable protection without derating at 85 °C ambient. |
| Programmable Voltage Reference | Automotive Battery Monitoring |
Use Scenario: Combined with precision resistors in voltage divider networks to generate stable reference voltages for ADCs or comparators. IC Role / Device Role / Timing Role: Primary voltage reference element establishing known potential against which analog signals are measured. Use Value: Low 44 Ω dynamic impedance minimizes reference shift under varying load currents from downstream circuitry. | Use Scenario: Monitoring 24 V vehicle battery systems where overvoltage detection above 30 V triggers shutdown or warning. IC Role / Device Role / Timing Role: Zener-based comparator input reference scaled via resistor network to detect >30 V thresholds. Use Value: Stable -65 °C to +150 °C operation and 0.5 μA IR at 51.7 V ensure reliability in under-hood environments with minimal quiescent drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | No e3 suffix; SnPb plating instead of RoHS-compliant matte tin | Not compliant with EU RoHS or China RoHS; restricted in new designs targeting export markets | Select 1N5373E3/TR13 for RoHS-conforming production; choose 1N5373B only for legacy repair or exempt military programs |
| SMBJ5373B | Surface-mount SMB package (vs. axial T-18); same 68 V/±5%/5 W specs | Requires PCB re-layout; lacks axial leads for through-hole prototyping or high-vibration mounting | Choose SMBJ5373B for space-constrained SMT designs; retain 1N5373E3/TR13 for through-hole assembly, manual repair, or mechanical robustness |
Compared with 1N5373B and SMBJ5373B, the 1N5373E3/TR13 provides identical electrical performance with RoHS compliance and tape-and-reel packaging, making it optimal for volume production requiring environmental compliance and automated placement compatibility.
Availability
1N5373E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage clamps, and programmable voltage references requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1N5373E3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N53xx series was designed as a JEDEC-standardized family of 5 W axial Zener diodes to deliver rugged, temperature-stable voltage regulation for power conversion, protection, and reference applications in harsh environments.
FAQ
What is the Zener voltage tolerance of the 1N5373E3/TR13?
The 1N5373E3/TR13 has a nominal Zener voltage of 68 V with ±5% tolerance, as indicated by the 'B' in its base part number (1N5373B) and confirmed in the electrical characteristics table. This tolerance applies across the full operating temperature range of –65 °C to +150 °C and ensures predictable clamping behavior in feedback and protection circuits using the 1N5373E3/TR13.
Does the 1N5373E3/TR13 require dry packing due to moisture sensitivity?
No, the 1N5373E3/TR13 does not require dry packing. Its plastic encapsulation meets IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it can be stored indefinitely at standard ambient conditions without baking or humidity-controlled packaging prior to soldering - a key advantage for inventory management and the 1N5373E3/TR13's ease of use in high-mix manufacturing.
What is the maximum continuous power dissipation for the 1N5373E3/TR13 on a standard PCB?
The 1N5373E3/TR13 dissipates up to 1.47 W continuously when mounted on a FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm wide × 25 mm long traces - based on its 85 °C/W junction-to-ambient thermal resistance. Exceeding this requires external heat sinking or reduced ambient temperature; the full 5 W rating applies only with 10 mm lead length and controlled lead temperature (TL < 25 °C), as defined for the 1N5373E3/TR13.
How is polarity marked on the 1N5373E3/TR13?
The 1N5373E3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode during Zener operation. This marking is visible on the black epoxy body and aligns with JEDEC T-18 package standards, ensuring correct orientation during manual or automated placement of the 1N5373E3/TR13 in voltage regulation circuits.
What does the 'TR13' suffix indicate in 1N5373E3/TR13?
'TR13' denotes tape-and-reel packaging per EIA-296 standard, with 13-inch reels - confirming the 1N5373E3/TR13 is supplied in automated pick-and-place compatible format. This differs from bulk or ammo-pack variants and ensures consistent feeding, traceability, and handling efficiency in SMT production lines using the 1N5373E3/TR13.
1N5373E3/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:
- ±20%
- 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
1N5373E3/TR13 FAQ
1.How can I place an order for 1N5373E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5373E3/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 1N5373E3/TR13 reliable?
The price and inventory of 1N5373E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5373E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5373E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5373E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5373E3/TR13?
1N5373E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5373E3/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 1N5373E3/TR13?
For technical support, including 1N5373E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5373E3/TR13 requirements.
6.How does Aetrix verify that 1N5373E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5373E3/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 1N5373E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5373E3/TR13?
All 1N5373E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5373E3/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 1N5373E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5373E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5373E3/TR13 Tags
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MM5Z5V1ST1G
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