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Microchip Technology 1N5370BE3/TR12
- Part No.:
- 1N5370BE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5370BE3/TR12.pdf
- Description:
- DIODE ZENER 56V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:9,531
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Product details
Overview
1N5370BE3/TR12 from Microsemi is a 56 V, ±5% tolerance, 5 W axial-leaded silicon Zener diode with 20 mA test current, 35 Ω dynamic impedance at IZT, and 0.5 μA reverse leakage at 42.6 V; used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N5370BE3/TR12 datasheet, 1N5370BE3/TR12 pinout, 1N5370BE3/TR12 application, or 1N5370BE3/TR12 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.
Technical Context
This device operates as a two-terminal voltage reference in reverse-biased mode, maintaining stable 56 V regulation across 10–50% of its maximum Zener current (IZM = 86 mA). Its low dynamic impedance (35 Ω) ensures minimal voltage variation under load changes.
Designed for high-reliability DC regulation, it supports operation from –65 °C to +150 °C, features moisture sensitivity level 1 (no dry pack required), and withstands 8.3 ms half-sine surge currents up to 280 A per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% - precise regulation point for feedback networks requiring tight tolerance |
| Test Current (IZT) | 20 mA - standard bias point for measuring VZ and ZZ per JEDEC |
| Dynamic Impedance (ZZ) | 35 Ω at IZT - low AC resistance ensures stable output under varying load |
| Max Reverse Leakage (IR) | 0.5 μA at 42.6 V - negligible standby current in high-impedance sensing paths |
| Max Zener Current (IZM) | 86 mA - maximum continuous DC current at 25 °C with adequate heat sinking |
| Surge Current (IZSM) | 280 A (8.3 ms half-sine) - robust transient suppression capability |
| Voltage Regulation (ΔVZ) | 1.00 V - difference between VZ measured at 10% and 50% of IZM |
Pinout & Package
Package: T-18 axial-leaded plastic case (Void-free UL94V-0 epoxy), cathode indicated by band; leads are annealed matte-tin plated (RoHS compliant), solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; supplies stable 56 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N53xxB series mechanical and electrical definitions |
| ±5% voltage tolerance (B suffix) | Reduces calibration overhead in mid-precision power supply designs |
| 25 °C/W junction-to-lead thermal resistance | Enables 5 W dissipation with simple lead-length heat sinking (3/8″ from body) |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for handling precautions during manual assembly or prototyping |
| Moisture sensitivity Level 1 | No dry pack or baking required before PCB assembly |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Integrated into TL431-based feedback loop of isolated 48 V DC-DC converter to regulate output within ±1%. IC Role / Device Role / Timing Role: Primary voltage reference establishing error amplifier setpoint. Use Value: 56 V Zener voltage matches secondary-side snubber clamp threshold, preventing transformer reset overshoot. | Use Scenario: Placed across motor driver H-bridge rail to suppress inductive kickback spikes exceeding 60 V. IC Role / Device Role / Timing Role: Passive clamping element limiting transient voltage to safe levels for MOSFETs. Use Value: 280 A surge rating absorbs repetitive 100 A, 10 μs spikes without degradation. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Paired with precision resistor divider to generate 12 V reference for ADC input scaling in PLC analog input module. IC Role / Device Role / Timing Role: Stable DC reference source independent of supply rail fluctuations. Use Value: 35 Ω dynamic impedance ensures <0.1% output shift across 1–10 mA load variations. | Use Scenario: Supplies excitation voltage to 350 Ω strain gauge bridge in weigh scale transducer interface. IC Role / Device Role / Timing Role: Low-noise, temperature-stable bias source for ratiometric measurement. Use Value: ΔVZ = 1.00 V guarantees ≤1.8% total error across –40 °C to +85 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5370BRLG | Same 56 V ±5%, 5 W rating; surface-mount DO-204AL (SMA) package instead of axial T-18 | Requires PCB re-layout; unsuitable for through-hole prototyping or chassis mounting | Select when board space is constrained and automated SMT assembly is used |
| MMBZ5255BLT1G | 56 V ±5%, but only 0.35 W power rating and 100 Ω ZZ; SOT-23 package | Cannot handle >6 mA continuous current; inadequate for power regulation or clamping | Use only in low-power signal-level referencing where thermal mass is not required |
Compared with 1N5370BE3/TR12, the 1N5370BRLG offers identical electrical performance in a compact surface-mount form, while the MMBZ5255BLT1G trades power handling and regulation stability for miniaturization-making the 1N5370BE3/TR12 optimal for robust 5 W DC regulation where axial lead mechanical strength and thermal derating margin are critical.
Availability
1N5370BE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive protection circuits, and programmable reference designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5370BE3/TR12 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 1N53xxB series was engineered 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 for 1N5370BE3/TR12?
The 1N5370BE3/TR12 has a ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per Microsemi's datasheet revision D. This means its nominal 56 V breakdown voltage falls within 53.2 V to 58.8 V at 20 mA test current and 25 °C lead temperature. The e3 suffix indicates RoHS compliance, and TR12 denotes tape-and-reel packaging per EIA-296 standard.
Can 1N5370BE3/TR12 be used in surface-mount designs?
No-1N5370BE3/TR12 uses an axial-leaded T-18 package and is not compatible with surface-mount assembly. For SMT equivalents, Microsemi lists SMBJ5370B or SMBG5370B in the same datasheet. These share identical electrical specs (56 V, ±5%, 5 W) but use DO-214AA (SMB) or DO-214AB (SMBG) packages. Substituting 1N5370BE3/TR12 directly onto an SMT footprint would require mechanical adaptation and void thermal validation.
What is the maximum steady-state power dissipation for 1N5370BE3/TR12 at ambient temperature?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N5370BE3/TR12 delivers 1.47 W steady-state power at 25 °C ambient. Its full 5 W rating applies only with junction-to-lead thermal resistance of 25 °C/W-achieved using ≥10 mm (3/8″) lead length from the epoxy body as a heatsink per Figure 1 in the datasheet.
Does 1N5370BE3/TR12 require baking before reflow soldering?
No-1N5370BE3/TR12 has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry-packaging or pre-reflow baking. Its void-free thermosetting epoxy body eliminates moisture ingress risk, and the datasheet explicitly states "no dry pack required." Lead finish is RoHS-compliant matte tin, rated for 260 °C for 10 seconds.
How does the voltage regulation (ΔVZ) specification impact design margin for 1N5370BE3/TR12?
The 1N5370BE3/TR12 has a specified voltage regulation (ΔVZ) of 1.00 V-the difference between its Zener voltage measured at 10% and 50% of IZM (8.6 mA and 43 mA). This defines the worst-case variation across its usable current range and must be included in total error budgets for precision references. For example, in a 56 V clamp, system overvoltage margin must exceed 1.00 V to accommodate this intrinsic regulation spread.
1N5370BE3/TR12 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/TR12 FAQ
1.How can I place an order for 1N5370BE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5370BE3/TR12 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/TR12 reliable?
The price and inventory of 1N5370BE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5370BE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5370BE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5370BE3/TR12 transactions.
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4.How is shipping managed for 1N5370BE3/TR12?
1N5370BE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5370BE3/TR12 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/TR12?
For technical support, including 1N5370BE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5370BE3/TR12 requirements.
6.How does Aetrix verify that 1N5370BE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5370BE3/TR12 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/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5370BE3/TR12?
All 1N5370BE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5370BE3/TR12, 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/TR12 part is unused and in its original packaging.
Return procedure for 1N5370BE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5370BE3/TR12 Tags
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