My Inquiry
My Account
Microchip Technology 1N5373AE3/TR13
- Part No.:
- 1N5373AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5373AE3/TR13.pdf
- Description:
- DIODE ZENER 68V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:8,770
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5373AE3/TR13 from Microsemi is a 5 W axial-leaded Zener diode with nominal regulation voltage of 68 V, ±10% tolerance (A suffix), 20 mA test current, 44 Ω dynamic impedance at IZT, and maximum reverse current of 0.5 μA at 51.7 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 1N5373AE3/TR13 datasheet, 1N5373AE3/TR13 pinout, 1N5373AE3/TR13 application, or 1N5373AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, 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 functions as a two-terminal voltage regulator in reverse-biased mode, maintaining stable output across wide current (10–500 mA) and temperature (–65 °C to +150 °C) ranges. Its low 25 °C/W junction-to-lead thermal resistance enables high steady-state power dissipation (5 W at TL ≤ 25 °C) when mounted with 3/8″ lead length from body.
It exhibits minimal voltage drift versus current-ΔVZ = 2.0 V between 10% and 50% of IZM-and withstands non-repetitive 8.3 ms half-sine surge currents up to 500 A. The cathode band marking and axial T-18 package support manual and automated through-hole assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±10% - defines regulated output level under specified test conditions (IZT = 20 mA, TL = 25 °C) |
| Power Dissipation | 5.0 W at TL ≤ 25 °C - requires ≥3/8″ lead length from body for full rating; derates linearly above 25 °C |
| Dynamic Impedance (ZZ) | 44 Ω at IZT = 20 mA - determines output voltage stability against load current variations |
| Max Reverse Current (IR) | 0.5 μA at VR = 51.7 V - ensures low leakage in standby or high-impedance bias networks |
| Surge Current (IZSM) | 500 A (8.3 ms half-sine) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 25 °C/W junction-to-lead - enables high continuous current operation with minimal heatsinking |
| Operating Temperature | –65 °C to +150 °C - suitable for harsh environments including automotive under-hood and industrial controls |
Pinout & Package
Package: Axial-leaded T-18 plastic case (void-free UL94V-0 epoxy), cathode indicated by colored band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential node in Zener regulation | Accepts forward current up to 1.0 A (VF ≤ 1.2 V); must be held negative relative to cathode during regulation |
| Cathode | Current exit terminal in forward bias; connected to higher-potential node in Zener regulation | Banded end; must be held positive relative to anode to enable reverse breakdown and voltage regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| Moisture sensitivity Level 1 | No dry pack required prior to soldering-reduces handling cost and avoids moisture-related popcorning |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during board assembly and testing |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU with lead-free matte-tin plating and halogen-free epoxy |
| Tape-and-reel packaging (TR13) | Enables automated pick-and-place insertion; TR13 denotes EIA-296 compliant 13-inch reel |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Stabilizing reference voltage for feedback loops in 48 V DC-DC converters used in factory automation systems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing precise 68 V reference to error amplifier input. Use Value: Maintains ±10% output accuracy across –40 °C to +85 °C ambient with ΔVZ = 2.0 V, enabling tight regulation without trimming. |
Use Scenario: Clamping transient spikes on 48 V rail caused by relay switching or motor commutation in PLC I/O modules. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing 500 A surge (8.3 ms) without degradation. Use Value: Prevents downstream IC damage by limiting rail voltage to ≤76 V (VZM = 74.8 V), validated per MIL-STD-750 Method 3019. |
| Test Equipment Reference Source | Telecom Line Interface Protection |
|
Use Scenario: Generating stable calibration references in portable multimeters and benchtop power analyzers. IC Role / Device Role / Timing Role: Low-drift voltage reference source operating at 20 mA IZT with 44 Ω ZZ. Use Value: Delivers <0.5 μA leakage at 51.7 V, minimizing loading error in high-impedance divider networks. |
Use Scenario: Protecting line interface ICs from lightning-induced surges on -48 V telecom distribution boards. IC Role / Device Role / Timing Role: Primary shunt protector placed before TVS diodes and isolation transformers. Use Value: Withstands repeated 500 A surges while maintaining VZ stability within 2.0 V regulation window per JEDEC spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5373B | Same 68 V nominal voltage but ±5% tolerance (B suffix) and 20 mA IZT; identical package and thermal specs | Higher precision needed where tighter regulation (±5% vs ±10%) justifies cost premium | Select 1N5373B if system-level voltage tolerance budget requires <±3.4 V deviation at 68 V |
| SMBJ5373B | Surface-mount SMB package; same 68 V ±5%, 20 mA IZT, but lower surge rating (100 A vs 500 A) and higher ZZ (50 Ω) | Used where PCB space constraints prohibit axial T-18; unsuitable for high-energy transients | Choose SMBJ5373B only for compact consumer-grade designs with controlled surge environments |
Compared with 1N5373AE3/TR13, the 1N5373B offers tighter voltage control for critical references, while SMBJ5373B trades surge robustness and thermal performance for board-space savings-neither is pin-compatible due to differing form factors and mounting methods.
Availability
1N5373AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, test equipment reference sources, and telecom line interface protection requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for 1N5373AE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N53xx series was designed specifically for ruggedized voltage regulation and transient suppression in mission-critical power systems where long-term stability and surge survivability are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N5373AE3/TR13?
The 1N5373AE3/TR13 has a Zener voltage tolerance of ±10%, denoted by the "A" suffix in its part number. This means its actual regulation voltage falls between 61.2 V and 74.8 V at 20 mA test current and 25 °C lead temperature. This tolerance is confirmed in the manufacturer's Electrical Characteristics table and applies across the full operating temperature range.
Does the 1N5373AE3/TR13 require dry packing before reflow soldering?
No, the 1N5373AE3/TR13 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity Level 1 classification, meaning it can be stored and processed indefinitely at standard ambient conditions without baking. This eliminates moisture-related defects like popcorning during wave or reflow soldering.
What is the maximum surge current rating for the 1N5373AE3/TR13?
The 1N5373AE3/TR13 is rated for a maximum non-repetitive surge current (IZSM) of 500 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is validated per JEDEC standards and reflects its capability to absorb high-energy transients without parametric shift or catastrophic failure.
How is polarity marked on the 1N5373AE3/TR13?
The cathode of the 1N5373AE3/TR13 is marked by a distinct color band on the axial T-18 package body. During voltage regulation, the banded (cathode) end must be held positive relative to the anode. This marking is consistent across all 1N53xx series devices and aligns with JEDEC-standard diode polarity conventions.
What does the "e3" and "TR13" suffix indicate in 1N5373AE3/TR13?
The "e3" suffix confirms RoHS compliance with lead-free matte-tin plating and halogen-free epoxy encapsulation. The "TR13" indicates tape-and-reel packaging per EIA-296 standard on a 13-inch reel-enabling automated placement in high-volume SMT lines despite its axial-leaded form factor.
1N5373AE3/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:
- ±10%
- 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
1N5373AE3/TR13 FAQ
1.How can I place an order for 1N5373AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5373AE3/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 1N5373AE3/TR13 reliable?
The price and inventory of 1N5373AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5373AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5373AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5373AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5373AE3/TR13?
1N5373AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5373AE3/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 1N5373AE3/TR13?
For technical support, including 1N5373AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5373AE3/TR13 requirements.
6.How does Aetrix verify that 1N5373AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5373AE3/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 1N5373AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5373AE3/TR13?
All 1N5373AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5373AE3/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 1N5373AE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5373AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5373AE3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
