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Microchip Technology SMAJ58E3/TR13
- Part No.:
- SMAJ58E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58E3/TR13.pdf
- Description:
- TVS DIODE 58VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,326
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Product details
Overview
SMAJ58E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 58 V standoff voltage (VWM), 64.4 V minimum breakdown voltage (VBR), and 103.0 V maximum clamping voltage (VC) at 4.9 A peak pulse current - deployed for ESD/EFT protection in DC power rails and I/O interfaces.
For engineers reviewing the SMAJ58E3/TR13 datasheet, SMAJ58E3/TR13 pinout, SMAJ58E3/TR13 application, or SMAJ58E3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-2/4-4, thermal resistance (15 °C/W junction-to-lead), RoHS-compliant matte-tin plating, and compatibility with standard FR4 PCB footprints per JEDEC MO-213.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds VBR = 64.4 V (min) at IBR = 1 mA, limiting transient energy to ≤103.0 V at 4.9 A IPP while maintaining <100 ps theoretical response time. It sustains 5 W steady-state dissipation at TL = 75 °C and withstands 40 A forward surge (8.3 ms half-sine).
Designed for surface-mount reliability, it features void-free UL94V-0 epoxy body, C-bend leads, and moisture sensitivity level 1 (no dry pack required). Its 15 °C/W junction-to-lead thermal resistance enables effective heat transfer to PCB copper, supporting robust operation across –65 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min) | 64.4 V @ 1 mA - Minimum avalanche initiation threshold; ensures predictable turn-on above nominal system voltage. |
| VC @ IPP | 103.0 V @ 4.9 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress exposure. |
| PPP | 500 W - Peak pulse power handling capability; supports high-energy transients like lightning-induced surges (IEC61000-4-5 Class 4). |
| ID @ VWM | ≤5.3 µA - Low leakage current at standoff voltage; minimizes standby power loss and avoids false triggering. |
| tclamp | <100 ps (theoretical) - Near-instantaneous response enables effective suppression of ESD events per IEC61000-4-2 Level 4 (±15 kV air). |
| TJ Range | –65 °C to +150 °C - Wide operating temperature window suitable for automotive under-hood and industrial control environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free UL94V-0 epoxy case with C-bend (modified J-bend) matte-tin-plated leads. Cathode indicated by band on body; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to signal/power line requiring overvoltage protection; forms low-impedance path to ground during clamping. |
| Cathode | High-side connection to ground reference | Connected to system ground plane; provides return path for surge current; marked by band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per J-STD-020B Level 1 - eliminates lead content without compromising solderability or thermal cycling reliability. |
| 500 W peak pulse rating | Validated at 10/1000 µs waveform - delivers industry-standard surge immunity for industrial and telecom power inputs. |
| Low thermal resistance | 15 °C/W junction-to-lead - enables efficient heat conduction into PCB copper, sustaining repeated surge events without derating. |
| IEC61000-4-2/4-4 compliance | ESD ±15 kV (air), ±8 kV (contact); EFT 4 kV - certified performance for front-end interface protection in medical and industrial equipment. |
| Standard tape-and-reel packaging | TR13 = 2500 units/reel, 12 mm tape - optimized for automated SMT placement with EIA-481-1-A alignment and traceable lot control. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module I/O |
|---|---|
|
Use Scenario: 48 V DC input rail in programmable logic controllers exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to shunt surge energy before reaching DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤103.0 V, preventing damage to downstream 60 V-rated MOSFETs and ensuring system uptime per IEC61000-4-5 Class 4 (42 Ω source). |
Use Scenario: LIN bus or sensor signal lines in BCMs subjected to ESD events during assembly and field service. IC Role / Device Role / Timing Role: Point-of-entry TVS on each LIN line, cathode grounded, anode tied to signal trace to suppress ±15 kV contact ESD per IEC61000-4-2. Use Value: Sub-100 ps response clamps ESD faster than signal edge rates, preserving data integrity without adding capacitance that degrades 20 kbps LIN timing. |
| Telecom DC Feeder Protection | Medical Equipment Power Supply Input |
|
Use Scenario: -48 V telecom rectifier output feeding remote radio units, vulnerable to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary-level TVS on DC feed line, coordinated with upstream GDTs to handle secondary lightning energy per IEC61000-4-5 (12 Ω source, Class 2). Use Value: 500 W rating absorbs up to 4.9 A peak pulses without degradation, enabling single-stage protection architecture and reducing BOM count. |
Use Scenario: AC/DC adapter input stage in Class II medical devices requiring reinforced isolation and low leakage. IC Role / Device Role / Timing Role: Secondary-side TVS on isolated 24 V DC output, protecting analog front-end ICs from coupling transients through transformer parasitics. Use Value: ≤5.3 µA standby leakage at 58 V ensures compliance with IEC60601-1 creepage/clearance requirements and avoids unintended biasing of precision amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A | No "e3" RoHS suffix; SnPb plating instead of matte tin; identical electrical specs and DO-214AC package. | Not suitable for RoHS-compliant production; requires leaded solder process and fails IPC/JEDEC J-STD-020B moisture classification. | Select SMAJ58A only for legacy repair or non-RoHS military/aerospace programs where SnPb assembly is mandated. |
| SMBJ58A | Same VWM/VBR/VC, but 600 W rating and DO-214AA (SMB) package - 2.5× larger footprint and 20% higher thermal resistance (18 °C/W). | Better surge margin but incompatible with SMA-reflow profiles and space-constrained layouts; not drop-in replaceable. | Choose SMBJ58A only when PCB layout allows larger pad area and thermal budget requires >500 W headroom. |
Compared with SMAJ58A and SMBJ58A, SMAJ58E3/TR13 uniquely combines RoHS compliance, industry-standard SMA footprint, and verified 500 W IEC61000-4-5 Class 4 capability - making it optimal for high-volume, space-sensitive, and environmentally regulated designs.
Availability
SMAJ58E3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control module I/O, and telecom DC feeder protection requiring stable component supply and full RoHS compliance.
Supply support for SMAJ58E3/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 SMAJ series was engineered for surface-mount transient suppression in harsh environments - delivering fast-response, high-power clamping in compact DO-214AC packages for mission-critical power and signal line protection.
FAQ
What is the clamping voltage of SMAJ58E3/TR13 at its rated peak pulse current?
The SMAJ58E3/TR13 has a maximum clamping voltage (VC) of 103.0 V at 4.9 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi datasheet MSC0270A and defines the upper voltage limit imposed on protected circuits during surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Is SMAJ58E3/TR13 unidirectional or bidirectional, and how is polarity identified?
SMAJ58E3/TR13 is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. Polarity is indicated by a cathode band on the package body - the banded end connects to system ground, and the unbanded end connects to the protected line. Bidirectional variants use a "CA" suffix (e.g., SMAJ58CA), which SMAJ58E3/TR13 does not carry.
Does SMAJ58E3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ58E3/TR13 is rated for secondary lightning protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. Specifically, it supports Class 2 (12 Ω source) and Class 4 (42 Ω source) testing, as confirmed in the Applications section of the MSC0270A datasheet. Its 500 W rating and 103.0 V clamping ensure compliance when used with appropriate coordination components.
What is the thermal resistance and steady-state power rating of SMAJ58E3/TR13?
SMAJ58E3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and a steady-state power dissipation of 5 W at lead temperature (TL) = 75 °C. When mounted on a standard FR4 board with 1 oz copper and recommended footprint, it dissipates 1.56 W at ambient temperature (TA) = 25 °C. These values guide heatsinking and layout decisions for continuous-duty applications.
What does the "TR13" suffix indicate in SMAJ58E3/TR13?
The "TR13" suffix denotes tape-and-reel packaging: 2500 units per 13-inch reel, using 12 mm wide carrier tape compliant with EIA-481-1-A standards. This format enables automated pick-and-place assembly and supports traceability via reel labeling. The "e3" portion confirms RoHS-compliant matte-tin plating, while "TR13" specifies mechanical packaging - both are integral to the full orderable part number SMAJ58E3/TR13.
SMAJ58E3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 4.9A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58E3/TR13 FAQ
1.How can I place an order for SMAJ58E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58E3/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 SMAJ58E3/TR13 reliable?
The price and inventory of SMAJ58E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ58E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58E3/TR13?
SMAJ58E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58E3/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 SMAJ58E3/TR13?
For technical support, including SMAJ58E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58E3/TR13 requirements.
6.How does Aetrix verify that SMAJ58E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ58E3/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 SMAJ58E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ58E3/TR13?
All SMAJ58E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58E3/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 SMAJ58E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ58E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58E3/TR13 Tags
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