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Microchip Technology 1N5370E3/TR13
- Part No.:
- 1N5370E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5370E3/TR13.pdf
- Description:
- DIODE ZENER 56V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,812
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Product details
Overview
1N5370E3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 56 V, ±5% tolerance (B-suffix equivalent), 20 mA test current, 35 Ω dynamic impedance at IZT, and maximum reverse current of 0.5 μA at 42.6 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 1N5370E3/TR13 datasheet, 1N5370E3/TR13 pinout, 1N5370E3/TR13 application, or 1N5370E3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (280 A), voltage regulation (ΔVZ = 1.00 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 (20 mA IZT to 55 mA IZM) and temperature ranges. Its low dynamic impedance (35 Ω) and tight voltage regulation (1.00 V ΔVZ) ensure minimal output drift under load variation.
Designed for axial-lead through-hole mounting with T-18 package, it features void-free UL94V-0 epoxy encapsulation, cathode band polarity marking, and moisture sensitivity level 1-no dry pack required. Thermal performance is specified at 3/8″ (10 mm) lead length from body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V nominal, ±5% tolerance - defines precise clamping threshold for protection or reference circuits |
| Test Current (IZT) | 20 mA - operating point where VZ and ZZ are guaranteed per JEDEC spec |
| Dynamic Impedance (ZZ) | 35 Ω at IZT - determines output voltage stability under current transients |
| Max Reverse Current (IR) | 0.5 μA at 42.6 V - ensures low leakage in high-impedance bias networks |
| Power Dissipation (PD) | 5.0 W at TL = 25 °C - requires heat sinking above ambient for sustained operation |
| Voltage Regulation (ΔVZ) | 1.00 V - difference between VZ measured at 10% and 50% of IZM, indicating line regulation quality |
| Surge Current (IZSM) | 280 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
Pinout & Package
Package: T-18 axial-leaded plastic case (UL94V-0 epoxy), 0.7 g weight, cathode indicated by band. Leads are RoHS-compliant annealed matte-tin plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse bias applied to cathode |
| Cathode | Zener regulation terminal / voltage clamp input | Banded end; connected to unregulated rail; maintains 56 V relative to anode when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener family | Ensures standardized electrical behavior and interchangeability across qualified suppliers |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU with matte-tin plating-no lead or hazardous substances |
| Moisture Sensitivity Level 1 | No dry pack or baking required before PCB assembly-reduces handling cost and risk |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands electrostatic discharge without parameter shift-simplifies handling in non-EPA areas |
| High surge current capability | 280 A peak (8.3 ms) enables robust transient voltage suppression without external crowbar |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stable 56 V reference in isolated DC-DC converter feedback loop for telecom power modules. IC Role / Device Role / Timing Role: Two-terminal voltage reference providing error amplifier setpoint. Use Value: ±5% tolerance and 1.00 V ΔVZ ensure output regulation within ±0.5% over line/load/temperature. | Use Scenario: Clamp circuit protecting 48 V DC input stage against lightning-induced surges. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting excess energy to ground during transients. Use Value: 280 A surge rating and 5 W steady-state dissipation handle IEC 61000-4-5 Level 4 surges without degradation. |
| Programmable Voltage Monitor | Calibrated Sensor Excitation |
Use Scenario: Threshold detector in battery management system monitoring 48 V bus for overvoltage fault. IC Role / Device Role / Timing Role: Precision Zener element setting comparator trip point. Use Value: Low 0.5 μA leakage at 42.6 V minimizes bias current error in high-impedance divider networks. | Use Scenario: Excitation source for strain gauge bridge requiring stable 56 V bias in test equipment. IC Role / Device Role / Timing Role: Regulated voltage source delivering constant excitation independent of supply ripple. Use Value: 35 Ω dynamic impedance limits output variation to <10 mV under 1 mA load change-critical for measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5370B | Same 56 V, ±5%, 5 W rating but non-RoHS tin-lead plating; no e3 suffix | Not suitable for RoHS-compliant production; identical thermal and electrical specs otherwise | Select 1N5370E3/TR13 for new designs requiring lead-free compliance and tape-and-reel delivery |
| SMBJ5370B | Surface-mount SMB package; same 56 V, ±5%, 5 W rating; higher thermal resistance (junction-to-ambient ≈ 85 °C/W) | Requires PCB layout change; unsuitable for axial through-hole boards or high-power heatsinking | Choose SMBJ5370B only when space-constrained SMT design and reflow compatibility are mandatory |
Compared with 1N5370B and SMBJ5370B, the 1N5370E3/TR13 provides RoHS compliance and tape-and-reel packaging while retaining identical Zener characteristics and superior thermal performance via axial leads-making it optimal for industrial through-hole power regulation where regulatory and supply-chain continuity matter.
Availability
1N5370E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, programmable voltage monitors, and calibrated sensor excitation systems requiring stable component supply and full RoHS compliance.
Supply support for 1N5370E3/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 5 W voltage regulation in harsh-environment power systems-emphasizing surge resilience, wide temperature operation, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5370E3/TR13?
The 1N5370E3/TR13 has a nominal Zener voltage of 56 V with ±5% tolerance, consistent with the "B" suffix designation in the 1N53xxB family. This tolerance is verified at 20 mA test current and 25 °C lead temperature, per JEDEC registration and Microsemi's REV D datasheet.
Does the 1N5370E3/TR13 require dry packing before PCB assembly?
No, the 1N5370E3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it is not hygroscopic and does not require dry packing or baking prior to reflow or wave soldering-reducing manufacturing overhead and handling risk.
What is the maximum surge current rating for the 1N5370E3/TR13?
The 1N5370E3/TR13 is rated for 280 A peak non-recurrent surge current (IZSM) using an 8.3 ms half-sine waveform, as specified in Microsemi's official datasheet. This enables reliable transient suppression in industrial power interfaces without derating.
How does the thermal resistance of the 1N5370E3/TR13 compare between lead and ambient mounting?
The 1N5370E3/TR13 has 25 °C/W junction-to-lead thermal resistance at 3/8″ (10 mm) lead length, but rises to 85 °C/W junction-to-ambient when mounted on FR4 with standard 1 oz copper pads-highlighting the benefit of heatsinking the leads directly for high-duty-cycle operation.
Is the 1N5370E3/TR13 compatible with lead-free soldering processes?
Yes, the 1N5370E3/TR13 uses RoHS-compliant annealed matte-tin plating qualified per MIL-STD-750 Method 2026 and supports soldering at 260 °C for 10 seconds-fully compatible with standard lead-free reflow profiles.
1N5370E3/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):
- 56 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 40.3 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
1N5370E3/TR13 FAQ
1.How can I place an order for 1N5370E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5370E3/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 1N5370E3/TR13 reliable?
The price and inventory of 1N5370E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5370E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5370E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5370E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5370E3/TR13?
1N5370E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5370E3/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 1N5370E3/TR13?
For technical support, including 1N5370E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5370E3/TR13 requirements.
6.How does Aetrix verify that 1N5370E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5370E3/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 1N5370E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5370E3/TR13?
All 1N5370E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5370E3/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 1N5370E3/TR13 part is unused and in its original packaging.
Return procedure for 1N5370E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5370E3/TR13 Tags
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MM5Z5V1ST1G
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