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Microchip Technology SMAJ48AE3/TR13
- Part No.:
- SMAJ48AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48AE3/TR13.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,355
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Product details
Overview
SMAJ48AE3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary overvoltage protection of DC power rails and signal lines. It features a 48 V reverse standoff voltage (VWM), 53.3 V minimum breakdown voltage (VBR), 85.5 V maximum clamping voltage at 5.8 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - used in industrial power supplies, telecom interface circuits, and automotive body control modules.
For engineers reviewing the SMAJ48AE3/TR13 datasheet, SMAJ48AE3/TR13 pinout, SMAJ48AE3/TR13 application, or SMAJ48AE3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 secondary lightning surge (42 Ω source), RoHS-compliant matte-tin plating, DO-214AC package thermal resistance (15 °C/W junction-to-lead), and compatibility with automated SMT assembly using EIA-481-1-A tape-and-reel packaging.
Technical Context
This TVS operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds VBR = 53.3 V (tested at IBR = 1 mA). Its <100 ps theoretical response time enables effective suppression of ESD per IEC61000-4-2 (±8 kV contact) and EFT per IEC61000-4-4 (±2 kV).
Thermal design relies on low junction-to-lead thermal resistance (15 °C/W) and FR4 PCB mounting with recommended footprint; steady-state power dissipation is 5 W at lead temperature (TL) = 75 °C. The device is rated for operating temperatures from –65 °C to +150 °C and withstands solder reflow up to 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe DC rail operating margin. |
| VBR min @ IBR | 53.3 V @ 1 mA - Minimum voltage at which avalanche conduction begins; ensures predictable turn-on threshold. |
| VC @ IPP | 85.5 V @ 5.8 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient stress. |
| PPP | 500 W - Peak pulse power handling capability; supports IEC61000-4-5 Class 4 (42 Ω source) surges. |
| IPP | 5.8 A - Peak pulse current corresponding to VC; used to size series impedance for surge current limiting. |
| TJ Range | –65 °C to +150 °C - Full operational junction temperature range; validated for automotive under-hood and industrial environments. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for thermal dissipation and mechanical robustness. |
Pinout & Package
DO-214AC (SMA) package with cathode-indicated band marking; void-free thermosetting epoxy case (UL94V-0), C-bend tin-lead or RoHS-compliant matte-tin terminals; weight: 0.064 g; moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes current path during reverse surge conduction. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 48 V rail); carries full surge current to anode during clamping event. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating meets J-STD-020B Level 1 moisture sensitivity; no dry pack required prior to reflow. |
| Tape-and-reel packaging | EIA-481-1-A compliant: 12 mm carrier tape, 750 units per 7-inch reel or 2500 per 13-inch reel (TR13 designation). |
| IEC61000-4-5 compliance | Validated for secondary lightning protection up to Class 4 (42 Ω source) and Class 2 (12 Ω source) per specification. |
| Fast response time | <100 ps theoretical turn-on delay enables suppression of sub-nanosecond ESD transients before IC damage occurs. |
| Thermal performance | 15 °C/W junction-to-lead resistance allows sustained 5 W dissipation at TL = 75 °C with standard FR4 layout. |
Applications
| Industrial Power Supply Protection | Telecom Data Line Protection |
|---|---|
Use Scenario: 48 V DC input rail in DIN-rail mounted programmable logic controllers exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground to clamp surges before reaching DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤85.5 V during 5.8 A surges, preserving 50 V-rated input capacitors and enabling reliable operation per IEC61000-4-5 Class 4. |
Use Scenario: RS-485 transceiver interface in outdoor base station equipment subject to induced RF and lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on A/B differential lines referenced to local ground, providing common-mode surge suppression. Use Value: Clamps fast-rising transients within <100 ps, preventing latch-up in MAX3485-level transceivers while maintaining signal integrity up to 10 Mbps. |
| Automotive Body Control Module | Medical Equipment Power Input |
Use Scenario: 48 V battery-supplied lighting control unit in commercial vehicles experiencing ISO 7637-2 Pulse 1 and Pulse 3a transients. IC Role / Device Role / Timing Role: Primary protection stage upstream of LDO regulators and CAN transceivers, absorbing energy before downstream filtering. Use Value: Withstands 40 A forward surge (8.3 ms half-sine) and clamps 10/1000 µs pulses to 85.5 V, meeting OEM surge immunity requirements without derating. |
Use Scenario: AC/DC adapter input stage in Class II medical devices requiring reinforced isolation and low leakage current. IC Role / Device Role / Timing Role: Standoff protection on secondary-side 48 V DC bus, guarding against capacitor discharge events and ESD coupling via user ports. Use Value: 1 μA max standby current at 48 V ensures no impact on patient-isolation barrier leakage limits; UL94V-0 epoxy supports safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3/TR13 | Same electrical specs but with high-reliability screening (HTRB, surge, thermal cycling) per MIL-PRF-19500 JANTX level. | Required for avionics, defense, or space-qualified designs where extended life testing and failure rate data are mandated. | Select SMAJ48AHE3/TR13 only if qualification to MIL-PRF-19500 or 100% temperature cycling (-55 °C to +125 °C) is contractually required. |
| SMBJ48A-E3/52 | DO-214AA (SMB) package; same VWM/VBR/VC, but lower PPP = 600 W (10/1000 µs) and higher thermal resistance (25 °C/W). | Used where board space permits larger footprint and higher clamping voltage (87.1 V) is acceptable for cost-sensitive consumer applications. | Choose SMBJ48A-E3/52 only if PCB layout accommodates larger SMB outline and thermal management allows higher junction temperature rise. |
Compared with SMAJ48AE3/TR13, SMAJ48AHE3/TR13 adds military-grade screening without changing clamping behavior, while SMBJ48A-E3/52 trades smaller footprint for reduced thermal efficiency and slightly higher clamping - making SMAJ48AE3/TR13 optimal for high-density industrial 48 V systems needing proven DO-214AC reliability.
Availability
SMAJ48AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for SMAJ48AE3/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 specifically for surface-mount transient suppression in harsh environments, emphasizing fast response, repeatable clamping, and robust thermal performance in compact DO-214AC packages.
FAQ
What is the clamping voltage of SMAJ48AE3/TR13 under a 10/1000 µs surge?
The SMAJ48AE3/TR13 has a maximum clamping voltage (VC) of 85.5 V at 5.8 A peak pulse current (IPP) for a 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is SMAJ48AE3/TR13 RoHS compliant and what does the "e3" suffix indicate?
Yes, SMAJ48AE3/TR13 is RoHS compliant. The "e3" suffix denotes annealed matte-tin plating per J-STD-020B Level 1 moisture sensitivity, eliminating the need for dry packing prior to reflow soldering. This plating meets IPC/JEDEC standards for solderability and long-term reliability in commercial and industrial applications.
What package type does SMAJ48AE3/TR13 use and what are its key mechanical features?
SMAJ48AE3/TR13 uses the DO-214AC (SMA) surface-mount package. Key mechanical features include void-free UL94V-0 epoxy casing, C-bend matte-tin terminals, cathode band marking, 0.064 g weight, and JEDEC-compliant dimensions (max 2.26 mm width, 5.48 mm length). Its wide leads provide low thermal resistance (15 °C/W junction-to-lead).
Can SMAJ48AE3/TR13 be used for bidirectional protection?
No, SMAJ48AE3/TR13 is a unidirectional TVS diode, indicated by the "A" suffix (as opposed to "CA" or "C"). It conducts only in reverse bias above VBR. For bidirectional protection, Microsemi offers SMAJ48CAE3/TR13 - a symmetrical device with identical VWM and clamping in both directions.
What IEC standards does SMAJ48AE3/TR13 meet for surge and ESD protection?
SMAJ48AE3/TR13 meets IEC61000-4-2 for ESD immunity (±8 kV contact, ±15 kV air), IEC61000-4-4 for electrical fast transients (EFT, ±2 kV), and IEC61000-4-5 for surge immunity (secondary lightning, up to Class 4 with 42 Ω source impedance). These ratings are confirmed in the Microsemi MSC0270A datasheet Applications section.
SMAJ48AE3/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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
SMAJ48AE3/TR13 FAQ
1.How can I place an order for SMAJ48AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48AE3/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 SMAJ48AE3/TR13 reliable?
The price and inventory of SMAJ48AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ48AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48AE3/TR13?
SMAJ48AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48AE3/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 SMAJ48AE3/TR13?
For technical support, including SMAJ48AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ48AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ48AE3/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 SMAJ48AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ48AE3/TR13?
All SMAJ48AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48AE3/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 SMAJ48AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ48AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ48AE3/TR13 Tags
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