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Microchip Technology 1N5370AE3/TR13
- Part No.:
- 1N5370AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5370AE3/TR13.pdf
- Description:
- DIODE ZENER 56V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:2,819
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Product details
Overview
1N5370AE3/TR13 from Microsemi is a 56 V, ±10% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and precision reference applications. It delivers 20 mA test current, 35 Ω dynamic impedance at 20 mA, and operates across –65°C to +150°C.
For engineers reviewing the 1N5370AE3/TR13 datasheet, 1N5370AE3/TR13 pinout, 1N5370AE3/TR13 application, or 1N5370AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance (±10%), surge current rating (280 A), thermal resistance (25 °C/W junction-to-lead), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown with cathode-banded polarity. Its regulation performance is defined by voltage regulation ΔVZ = 1.00 V (difference between 10% and 50% of IZM) and low knee impedance ZZK = 44 Ω at 1.0 mA.
Designed for axial-lead mounting on FR4 PCBs or chassis heat sinking, it achieves 5 W steady-state dissipation at TL < 25°C (3/8″ lead length) and derates linearly above that temperature. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±10% - defines regulated output voltage under nominal test conditions (IZT = 20 mA) |
| Power Dissipation (PD) | 5.0 W at TL < 25°C - maximum continuous power handling with adequate lead heat sinking |
| Test Current (IZT) | 20 mA - standardized current at which VZ is measured; sets operating point for stable regulation |
| Dynamic Impedance (ZZ) | 35 Ω at IZT - quantifies voltage change per current change; lower value improves regulation stability |
| Surge Current (IZSM) | 280 A (8.3 ms half-sine) - peak non-repetitive current capability for transient overvoltage clamping |
| Voltage Regulation (ΔVZ) | 1.00 V - difference between VZ at 10% and 50% of IZM; indicates flatness of breakdown knee |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design when leads serve as primary heat path |
Pinout & Package
Package: T-18 axial-leaded plastic case (Void-free transfer-molded thermosetting epoxy, UL94V-0 rated); cathode indicated by color band; RoHS-compliant annealed matte-tin plating; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node in regulation circuit; carries full load current during conduction |
| Cathode | Regulated output terminal | Banded end; held at stable VZ relative to anode; referenced to ground or feedback node in SMPS |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener series | Ensures industry-standard mechanical and electrical interchangeability across manufacturers |
| ±10% voltage tolerance (A suffix) | Supports cost-sensitive designs where tighter tolerance is unnecessary; reduces BOM complexity |
| RoHS-compliant e3 suffix | Meets EU Directive 2011/65/EU; tin-lead-free plating compatible with lead-free reflow profiles |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for special ESD handling during assembly; improves manufacturing yield |
| Level 1 moisture sensitivity | Allows indefinite floor life without dry-packaging or baking prior to soldering |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback loop via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Precision voltage reference establishing stable 56 V threshold for secondary-side regulation. Use Value: Maintains ±10% output accuracy over line/load/temperature; replaces higher-cost IC references in cost-optimized AC/DC adapters. | Use Scenario: Clamps transient surges on 48 V telecom or industrial DC bus lines to protect downstream MOSFETs and controllers. IC Role / Device Role / Timing Role: Fast-acting shunt element diverting excess energy during lightning-induced or inductive-switching spikes. Use Value: Withstands 280 A surge (8.3 ms) without degradation; low ΔVZ ensures predictable clamping window. |
| Programmable Voltage Reference | Current Source Biasing |
Use Scenario: Sets bias point for op-amp-based current sources or DAC output buffers requiring stable 56 V headroom. IC Role / Device Role / Timing Role: Two-terminal passive reference providing fixed potential against which active circuitry regulates. Use Value: Low ZZK (44 Ω @ 1 mA) enables stable operation even at microamp-level bias currents. | Use Scenario: Establishes constant current through high-voltage LED strings or sensor excitation circuits in industrial instrumentation. IC Role / Device Role / Timing Role: Series-connected Zener defining voltage drop across current-setting resistor. Use Value: Tight thermal resistance (25 °C/W) minimizes drift during sustained current flow; operates up to +150°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5370B | ±5% tolerance (vs. ±10% for 1N5370AE3/TR13); otherwise identical electrical specs and package | Suitable where tighter regulation is required without changing layout or thermal design | Select 1N5370B when system-level voltage accuracy demands <±5% deviation under full operating range |
| MMBZ5255B-TP | Surface-mount SOD-123 package; 56 V ±5%; 0.225 W power rating; not drop-in replaceable | Used in space-constrained, automated assembly environments where axial leads are incompatible | Choose MMBZ5255B-TP only when board real estate or assembly process mandates SMT; requires new footprint and thermal redesign |
Compared with 1N5370B and MMBZ5255B-TP, the 1N5370AE3/TR13 offers optimal balance of cost, axial-mount flexibility, and robust 5 W surge handling - making it preferred for industrial power supplies and legacy-compatible designs where leaded components remain standard.
Availability
1N5370AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable voltage reference designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5370AE3/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 engineered for ruggedized voltage regulation in harsh-environment power systems - emphasizing thermal resilience, surge survivability, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N5370AE3/TR13?
The 1N5370AE3/TR13 has a Zener voltage tolerance of ±10%, as indicated by the "A" suffix in its part number. This means its nominal 56 V breakdown voltage falls within 50.4 V to 61.6 V at 20 mA test current and 25°C. The tolerance is verified per JEDEC registration and applies across the full operating temperature range of –65°C to +150°C.
Does the 1N5370AE3/TR13 require dry packing before soldering?
No, the 1N5370AE3/TR13 does not require dry packing. It carries IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it has unlimited floor life and can be placed directly onto the PCB without baking or humidity-controlled storage. This simplifies manufacturing logistics and reduces assembly cost.
What is the maximum surge current rating for the 1N5370AE3/TR13?
The 1N5370AE3/TR13 is rated for a maximum non-repetitive surge current (IZSM) of 280 A, specified as the peak of an 8.3 ms half-sine waveform. This rating reflects its capability to absorb transient energy in overvoltage protection applications without permanent degradation, provided the device is properly heat-sunk during sustained operation.
How is polarity marked on the 1N5370AE3/TR13?
The 1N5370AE3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a more positive potential than the anode to operate in Zener breakdown mode. This marking conforms to JEDEC standards and is visible on the black epoxy body; correct orientation is critical for proper voltage regulation and circuit functionality.
Is the 1N5370AE3/TR13 RoHS compliant?
Yes, the 1N5370AE3/TR13 is RoHS compliant, as confirmed by the "e3" suffix in its part number. It features RoHS-compliant annealed matte-tin plating on its leads, meeting EU Directive 2011/65/EU requirements. The device is also compatible with lead-free reflow soldering profiles up to 260°C for 10 seconds.
1N5370AE3/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:
- ±10%
- 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
1N5370AE3/TR13 FAQ
1.How can I place an order for 1N5370AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5370AE3/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 1N5370AE3/TR13 reliable?
The price and inventory of 1N5370AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5370AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5370AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5370AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5370AE3/TR13?
1N5370AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5370AE3/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 1N5370AE3/TR13?
For technical support, including 1N5370AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5370AE3/TR13 requirements.
6.How does Aetrix verify that 1N5370AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5370AE3/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 1N5370AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5370AE3/TR13?
All 1N5370AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5370AE3/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 1N5370AE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5370AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5370AE3/TR13 Tags
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