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Microchip Technology 1N5370BE3/TR13
- Part No.:
- 1N5370BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5370BE3/TR13.pdf
- Description:
- DIODE ZENER 56V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,253
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Product details
Overview
1N5370BE3/TR13 from Microsemi is a 56 V, ±5% tolerance, 5 W 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, 35 Ω dynamic impedance at 20 mA, and operates across –65°C to +150°C.
For engineers reviewing the 1N5370BE3/TR13 datasheet, 1N5370BE3/TR13 pinout, 1N5370BE3/TR13 application, or 1N5370BE3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (280 A), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This Zener diode operates in reverse breakdown with cathode-banded polarity and requires heat sinking for sustained 5 W dissipation at lead temperature ≤25°C. Its regulation stability relies on low ΔVZ (1.00 V) between 10% and 50% of IZM and minimal voltage drift over temperature.
The device uses void-free UL94V-0 epoxy encapsulation with tin-lead or RoHS-compliant annealed matte-tin leads, rated for 260°C/10 s soldering. 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 ±5% - precise regulation point for 50–60 V rail clamping or reference generation |
| Test Current (IZT) | 20 mA - standardized bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZ) | 35 Ω max at 20 mA - low AC resistance ensures stable regulation under varying load current |
| Max Regulator Current (IZM) | 280 mA - maximum DC current at 25°C lead temperature with adequate heatsinking |
| Surge Current (IZSM) | 280 A - peak non-repetitive half-sine (8.3 ms) capability for transient overvoltage suppression |
| Voltage Regulation (ΔVZ) | 1.00 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
| Thermal Resistance (RθJL) | 25 °C/W junction-to-lead - enables thermal design with 3/8" (10 mm) lead length from body |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, 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 | Non-banded end | Connected to lower-potential node; reverse-biased operation requires this terminal to be negative relative to cathode |
| Cathode | Banded end | Connected to regulated output or reference node; must be held positive relative to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance (B suffix) | Enables tighter regulation than ±10% (A) or ±20% (no suffix) variants in feedback networks |
| RoHS-compliant e3 suffix | Meets EU RoHS Directive 2011/65/EU with matte-tin plating and lead-free assembly compatibility |
| 25 °C/W junction-to-lead thermal resistance | Supports full 5 W dissipation with simple lead-length heatsinking - no PCB copper pour required |
| Nonsensitive to ESD per MIL-STD-750 Method 1020 | Eliminates need for handling precautions beyond standard static-safe protocols |
| Moisture sensitivity Level 1 | Permits indefinite storage and reflow without baking or dry-pack requirements |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated 48 V DC-DC converter to regulate output within ±1%. IC Role / Device Role / Timing Role: Precision Zener reference establishing error amplifier threshold; replaces TL431 where higher power margin is needed. Use Value: 56 V rating matches secondary-side snubber and clamp thresholds; 35 Ω ZZ minimizes loop gain variation across load steps. | Use Scenario: Placed across motor driver H-bridge supply rail to clamp transients exceeding 60 V during inductive kickback. IC Role / Device Role / Timing Role: Standalone overvoltage clamp absorbing 280 A surge pulses without degradation. Use Value: 280 A IZSM rating handles worst-case 8.3 ms surges; 1.00 V ΔVZ ensures predictable clamping window. |
| Programmable Reference Voltage Source | Industrial Sensor Excitation Bias |
Use Scenario: Paired with series resistor to generate stable 56 V bias for avalanche photodiode (APD) arrays in optical sensing modules. IC Role / Device Role / Timing Role: High-stability voltage reference providing fixed reverse-bias potential independent of supply ripple. Use Value: Low 35 Ω ZZ and 1.00 V ΔVZ maintain <±0.5% bias variation across 5–25 mA operating range. | Use Scenario: Supplies regulated excitation voltage to 4–20 mA current-loop pressure transmitters requiring stable 50–60 V headroom. IC Role / Device Role / Timing Role: Primary shunt regulator defining loop compliance voltage; mounted directly to chassis for thermal stability. Use Value: 25 °C/W RθJL allows direct chassis conduction cooling; ±5% tolerance ensures repeatability across production batches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5370B | No e3 suffix; tin-lead plating instead of RoHS-compliant matte-tin | Not suitable for lead-free assembly; otherwise identical electrical specs and package | Select 1N5370B only for legacy tin-lead reflow processes where RoHS exemption applies |
| SMBJ5370B | Surface-mount SMB package (DO-214AA); same 56 V ±5%, but 1.0 W PD and higher ZZ (50 Ω) | Lower power handling and different thermal path; requires PCB copper area for heatsinking | Choose SMBJ5370B only when board space constraints prohibit axial-leaded mounting and 1 W regulation suffices |
Compared with 1N5370B and SMBJ5370B, the 1N5370BE3/TR13 uniquely combines RoHS compliance, 5 W axial-leaded power handling, and 25 °C/W thermal resistance - making it optimal for high-reliability industrial power rails where leaded assembly is not permitted and thermal margin is critical.
Availability
1N5370BE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, and programmable reference voltage sources requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N5370BE3/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 1N53xxB series was designed specifically for ruggedized voltage regulation in harsh-environment power systems - emphasizing thermal robustness, surge immunity, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N5370BE3/TR13?
The 1N5370BE3/TR13 has a Zener voltage tolerance of ±5%, indicated by the "B" suffix in its part number. This means its nominal 56 V Zener voltage falls within 53.2 V to 58.8 V at 20 mA test current and 25°C lead temperature. The e3 suffix confirms RoHS compliance but does not affect voltage tolerance.
Can the 1N5370BE3/TR13 be used without a heatsink?
The 1N5370BE3/TR13 can dissipate up to 1.47 W at 25°C ambient when mounted on a standard FR4 PCB with 4 mm² copper pads and 1 mm track width, per its 85°C/W junction-to-ambient rating. For full 5 W operation, it requires heatsinking via 3/8" (10 mm) lead length - meaning mechanical attachment to a chassis or metal frame is necessary to achieve the 25°C/W junction-to-lead thermal resistance.
What does the "TR13" suffix mean in 1N5370BE3/TR13?
The "TR13" suffix indicates tape-and-reel packaging per EIA-296 standard, with 1,300 units per reel. This format supports automated SMT placement equipment and ensures consistent orientation (cathode band aligned) during pick-and-place. The base part remains 1N5370BE3; TR13 adds logistics and assembly compatibility without altering electrical or thermal specifications.
How does the 1N5370BE3/TR13 handle ESD and surge events?
The 1N5370BE3/TR13 is nonsensitive to ESD per MIL-STD-750 Method 1020 and rated for 280 A non-repetitive surge current (8.3 ms half-sine). Its robust construction - void-free UL94V-0 epoxy body and annealed matte-tin leads - enables reliable clamping of inductive transients and electrostatic discharges without parameter shift or failure, provided lead temperature stays within limits.
Is the 1N5370BE3/TR13 compatible with lead-free reflow soldering?
Yes, the 1N5370BE3/TR13 is fully compatible with lead-free reflow soldering. Its RoHS-compliant e3 suffix certifies matte-tin plating meeting MIL-STD-750 Method 2026, and its package withstands 260°C for 10 seconds - exceeding JEDEC J-STD-020 requirements for Pb-free processes. No special prebake or moisture sensitivity handling is needed due to its IPC/JEDEC Level 1 rating.
1N5370BE3/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:
- ±5%
- 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
1N5370BE3/TR13 FAQ
1.How can I place an order for 1N5370BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5370BE3/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 1N5370BE3/TR13 reliable?
The price and inventory of 1N5370BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5370BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N5370BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5370BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5370BE3/TR13?
1N5370BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5370BE3/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 1N5370BE3/TR13?
For technical support, including 1N5370BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5370BE3/TR13 requirements.
6.How does Aetrix verify that 1N5370BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N5370BE3/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 1N5370BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N5370BE3/TR13?
All 1N5370BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5370BE3/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 1N5370BE3/TR13 part is unused and in its original packaging.
Return procedure for 1N5370BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5370BE3/TR13 Tags
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