My Inquiry
My Account
Microchip Technology 1N5370AE3/TR12
- Part No.:
- 1N5370AE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5370AE3/TR12.pdf
- Description:
- DIODE ZENER 56V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:3,855
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N5370AE3/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 56 V, ±10% tolerance (A suffix), 20 mA test current, 35 Ω maximum dynamic impedance at IZT, and 0.5 μA maximum reverse leakage at 42.6 V. It regulates voltage in power supply feedback paths and overvoltage protection circuits.
For engineers reviewing the 1N5370AE3/TR12 datasheet, 1N5370AE3/TR12 pinout, 1N5370AE3/TR12 application, or 1N5370AE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, 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 device operates as a two-terminal voltage reference, conducting in reverse breakdown to maintain stable output voltage across varying load currents. Its 56 V nominal Zener voltage is specified at 20 mA test current with ±10% tolerance, and it exhibits 35 Ω dynamic impedance at that bias point.
Thermal design relies on lead-length-dependent junction-to-lead resistance (25 °C/W at 3/8″ lead length) and supports up to 280 A non-repetitive surge current (8.3 ms half-sine). Reverse leakage remains ≤0.5 μA at 42.6 V, ensuring low standby power loss in clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±10% - defines regulated output level in shunt regulator or clamp circuits |
| Test Current (IZT) | 20 mA - operating point where VZ and ZZ are guaranteed |
| Dynamic Impedance (ZZ) | 35 Ω max at IZT - determines voltage deviation under load current changes |
| Max Reverse Leakage (IR) | 0.5 μA at 42.6 V - ensures minimal quiescent current in high-impedance bias networks |
| Surge Current (IZSM) | 280 A (8.3 ms half-sine) - supports transient overvoltage suppression without failure |
| Power Dissipation | 5.0 W at TL = 25 °C - requires heatsinking for sustained operation above ambient derating curve |
| Thermal Resistance | 25 °C/W junction-to-lead (3/8″ lead length) - enables thermal modeling for PCB layout and mounting |
Pinout & Package
Package: Axial-leaded T-18 plastic case (Void-free transfer-molded thermosetting epoxy, UL94V-0 rated); cathode indicated by band; RoHS-compliant annealed matte-tin plating; weight 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node in shunt configuration | Connected to lower-potential side of circuit; used as return path during Zener conduction |
| Cathode (banded end) | Reverse breakdown terminal / Regulated voltage node | Connected to higher-potential side; maintains 56 V relative to anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 5 W Zener | Industry-standard axial package with validated thermal and electrical performance |
| Moisture Sensitivity Level 1 | No dry pack required prior to soldering; simplifies handling and storage logistics |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Robust against electrostatic discharge during assembly without special precautions |
| RoHS-compliant (e3 suffix) | Meets EU Directive 2011/65/EU with matte-tin plating and lead-free construction |
| High surge current capability | Withstands 280 A transient surges (8.3 ms half-sine), enabling use in industrial surge protection |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for DC Bus |
|---|---|
Use Scenario: Stabilizes optocoupler input voltage in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 56 V threshold for error amplifier biasing. Use Value: Maintains ±10% output regulation despite line/load variations and temperature drift from –65 °C to +150 °C. | Use Scenario: Protects 48 V DC bus from transient spikes exceeding 60 V during motor commutation. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing energy via controlled reverse conduction. Use Value: Limits bus voltage to ≤56 V with 0.5 μA leakage at 42.6 V, minimizing standby power loss. |
| Programmable Voltage Reference | Industrial Sensor Excitation |
Use Scenario: Sets reference voltage for adjustable linear regulator controlling analog sensor bias. IC Role / Device Role / Timing Role: Precision Zener element defining stable 56 V rail independent of input ripple. Use Value: Delivers 35 Ω dynamic impedance at 20 mA, reducing output variation under changing load conditions. | Use Scenario: Supplies excitation voltage to strain gauge bridge in harsh-environment pressure transducer. IC Role / Device Role / Timing Role: Temperature-stable voltage source operating from –65 °C to +150 °C. Use Value: Ensures consistent bridge output with <1.0 V voltage regulation (ΔVZ) across 10–50% of IZM. |
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 (B suffix) vs. ±10% (A suffix); same VZ, IZT, ZZ, and package | Higher precision required in feedback loops where tighter regulation margin is critical | Select 1N5370B when system-level voltage accuracy demands <±5% tolerance |
| MMBZ5255B (SOT-23) | Surface-mount, 0.5 W rating, 56 V ±5%, 100 Ω ZZ at 10 mA - lower power, higher impedance, different footprint | Space-constrained PCBs where axial leads are impractical and power dissipation ≤0.5 W suffices | Choose MMBZ5255B only for low-power signal-level clamping, not 5 W regulation |
Compared with 1N5370B and MMBZ5255B, the 1N5370AE3/TR12 offers verified 5 W continuous dissipation in axial form with ±10% tolerance optimized for cost-sensitive industrial power rails, whereas 1N5370B improves precision and MMBZ5255B sacrifices power handling for miniaturization.
Availability
1N5370AE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, programmable voltage references, and industrial sensor excitation requiring stable component supply and long-term lifecycle support.
Supply support for 1N5370AE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial applications.
The 1N53xx series targets robust, high-power voltage regulation in harsh environments, emphasizing thermal stability, surge resilience, and JEDEC-standardized axial packaging for legacy and new industrial designs.
FAQ
What is the Zener voltage tolerance for 1N5370AE3/TR12?
The 1N5370AE3/TR12 has a Zener voltage tolerance of ±10%, indicated by the "A" suffix in its part number. This means its actual breakdown voltage falls between 50.4 V and 61.6 V at 20 mA test current and 25 °C junction temperature. The tolerance is confirmed in Microsemi's official datasheet revision D (2008) under Electrical Characteristics and Note 1.
Does 1N5370AE3/TR12 require dry packing before reflow soldering?
No, the 1N5370AE3/TR12 does not require dry packing before soldering. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1, meaning it can be stored and processed in ambient conditions without baking. This is explicitly stated in the Features section of the Microsemi datasheet and applies to all e3-suffix variants in the 1N5333B–1N5388B family.
What is the maximum surge current rating for 1N5370AE3/TR12?
The 1N5370AE3/TR12 is rated for a maximum non-repetitive surge current (IZSM) of 280 A, defined as the peak value of an 8.3 ms half-sine waveform. This rating is valid under specified test conditions and enables reliable transient suppression in industrial power systems, as documented in the Electrical Characteristics table on page 2 of the Microsemi datasheet.
How is polarity marked on the 1N5370AE3/TR12 package?
The cathode of the 1N5370AE3/TR12 is marked by a visible band on the body of the axial-leaded T-18 package. The diode must be operated with the banded end held at a higher potential than the unmarked (anode) end to achieve Zener breakdown regulation. This marking convention and operational polarity are specified in the Mechanical and Packaging section of the Microsemi datasheet.
What is the thermal resistance specification for 1N5370AE3/TR12?
The 1N5370AE3/TR12 has a junction-to-lead thermal resistance of 25 °C/W when measured at 3/8″ (10 mm) lead length from the body. When mounted on a standard FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, its junction-to-ambient thermal resistance is 85 °C/W. These values are provided in the Maximum Ratings section of the Microsemi datasheet and govern thermal derating curves.
1N5370AE3/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N5370AE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5370AE3/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 1N5370AE3/TR12 reliable?
The price and inventory of 1N5370AE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5370AE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5370AE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5370AE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5370AE3/TR12?
1N5370AE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5370AE3/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 1N5370AE3/TR12?
For technical support, including 1N5370AE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5370AE3/TR12 requirements.
6.How does Aetrix verify that 1N5370AE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5370AE3/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 1N5370AE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5370AE3/TR12?
All 1N5370AE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5370AE3/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 1N5370AE3/TR12 part is unused and in its original packaging.
Return procedure for 1N5370AE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5370AE3/TR12 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…
