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Microchip Technology SMAJ30CAE3/TR13
- Part No.:
- SMAJ30CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CAE3/TR13.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ30CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 30 V reverse standoff voltage (VWM), 500 W peak pulse power rating at 10/1000 µs, clamping voltage of 48.4 V at 10.3 A peak pulse current, and operates across –65 °C to +150 °C. It is widely deployed in industrial power supplies and telecom interface circuits.
For engineers reviewing the SMAJ30CAE3/TR13 datasheet, SMAJ30CAE3/TR13 pinout, SMAJ30CAE3/TR13 application, or SMAJ30CAE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package compatibility, and RoHS-compliant matte-tin plating per MIL-STD-750 method 2026.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transient overvoltages within nanoseconds - <5 ns response time for bidirectional operation - enabling protection against fast-rising ESD events (IEC61000-4-2) and repetitive electrical fast transients (IEC61000-4-4). Its symmetrical bidirectional structure eliminates polarity concerns in AC-coupled or floating lines.
The device is rated for 500 W peak pulse power at 10/1000 µs waveform with a maximum clamping voltage of 48.4 V at 10.3 A, ensuring safe voltage limiting for downstream ICs such as RS-485 transceivers or microcontroller I/O. Thermal resistance is 15 °C/W junction-to-lead when soldered to recommended FR4 footprint, supporting reliable power dissipation under surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line voltage. |
| VBR min @ IBR | 33.3 V @ 1 mA - Minimum breakdown voltage threshold; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPP | 48.4 V @ 10.3 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPP | 500 W - Peak pulse power handling capability; determines survivability against standardized lightning surges (IEC61000-4-5). |
| IPP | 10.3 A - Peak pulse current at rated clamping voltage; used with source impedance to verify system-level surge margin. |
| ID @ VWM | 1 µA - Maximum leakage at 30 V; negligible loading on low-power sensor or reference circuits. |
| Operating Temp | –65 °C to +150 °C - Wide junction temperature range supports deployment in automotive under-hood or industrial motor drive environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy body meeting UL94V-0; terminals feature C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating, solderable per MIL-STD-750 method 2026. Cathode band omitted for bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; interchangeable connection for AC or floating lines; enables single-component protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables universal placement on AC-coupled interfaces (e.g., RS-485, CAN bus) without polarity verification or board rework. |
| 500 W 10/1000 µs surge rating | Meets IEC61000-4-5 Class 1 (42 Ω source) and Class 2 (12 Ω source) secondary lightning requirements for industrial equipment. |
| <5 ns response time | Clamps ESD events (IEC61000-4-2 ±8 kV contact) before sensitive logic states are corrupted, preserving data integrity. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; no dry-pack required for standard SMT assembly. |
| DO-214AC footprint | Compatible with industry-standard SMA land pattern; allows drop-in replacement of legacy TVS diodes without PCB redesign. |
Applications
| Industrial Power Supply Input Protection | RS-485 Data Line Surge Suppression |
|---|---|
Use Scenario: 24 V DC input rail exposed to load dump and inductive switching transients in PLC power modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VIN and GND to clamp positive/negative surges before they reach DC-DC controller and LDOs. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or gate oxide damage in 36 V-rated power management ICs. |
Use Scenario: Full-duplex RS-485 transceiver (e.g., MAX3485) connected to long cables in factory automation networks. IC Role / Device Role / Timing Role: TVS mounted across differential pair (A/B) and to ground to suppress common-mode surges induced by nearby motor drives. Use Value: Maintains signal integrity by clamping transients within 5 ns while adding <0.5 pF capacitance per line - no data rate degradation at 10 Mbps. |
| Telecom DSL Line Interface Protection | Automotive Body Control Module (BCM) Sensor Inputs |
Use Scenario: ADSL/VDSL line driver circuitry interfacing with external telephone wiring subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS applied across transformer-coupled line inputs to absorb longitudinal surges per ITU-T K.20/K.44 standards. Use Value: Withstands 500 W pulses without degradation, enabling compliance with Telcordia GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: 5 V analog sensor inputs (e.g., temperature, humidity) in BCM exposed to battery disconnect transients and ISO 7637-2 pulse 1/2a. IC Role / Device Role / Timing Role: TVS placed at connector entry point to shunt energy away from op-amp front-end and ADC input stage. Use Value: 1 µA leakage at 30 V avoids measurement offset errors; –65 °C to +150 °C rating covers full automotive ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CAHE3/TR13 | Same electrical specs but with high-reliability screening (HTRB, surge, thermal cycling); higher cost and longer lead time. | Required for avionics or military-grade systems where extended qualification testing is mandated. | Select SMAJ30CAHE3/TR13 only if MIL-PRF-19500 JANTX or MA-grade screening is specified in design requirements. |
| SMBJ30CA-E3/52 | Same VWM, VC, and PPP, but in larger DO-214AA (SMB) package; 10% higher thermal resistance (16.7 °C/W). | Preferred where board space permits and higher surge margin is needed via improved heat spreading. | Choose SMBJ30CA-E3/52 if layout allows larger footprint and thermal performance under repeated surges is prioritized over miniaturization. |
Compared with SMAJ30CAE3/TR13, SMAJ30CAHE3/TR13 adds qualification testing for harsh environments but offers no electrical improvement, while SMBJ30CA-E3/52 trades compactness for slightly better thermal derating - making SMAJ30CAE3/TR13 optimal for space-constrained industrial designs requiring standard reliability.
Availability
SMAJ30CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, telecom line cards, and automotive body control modules requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SMAJ30CAE3/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 developed specifically for surface-mount transient suppression in space- and weight-constrained systems, balancing high surge capacity (500 W), fast response (<5 ns), and compatibility with automated SMT assembly.
FAQ
What is the clamping voltage of SMAJ30CAE3/TR13 at its rated peak pulse current?
The SMAJ30CAE3/TR13 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 10.3 A under the standard 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 surge events. The SMAJ30CAE3/TR13 maintains this clamping performance across its full operating temperature range.
Is SMAJ30CAE3/TR13 unidirectional or bidirectional, and how does that affect PCB layout?
SMAJ30CAE3/TR13 is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. As a result, the SMAJ30CAE3/TR13 has no cathode marking and can be placed in either orientation on the PCB - eliminating orientation checks during assembly and simplifying layout for AC-coupled or floating signal lines like RS-485 or CAN.
Does SMAJ30CAE3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ30CAE3/TR13 is rated for secondary lightning surge protection per IEC61000-4-5: it supports Class 1 (42 Ω source impedance) and Class 2 (12 Ω source impedance) testing up to its 500 W peak pulse rating. The SMAJ30CAE3/TR13 achieves this with a clamping voltage of 48.4 V at 10.3 A, ensuring protected circuits remain within safe operating limits during standardized surge waveforms.
What is the leakage current of SMAJ30CAE3/TR13 at its maximum standoff voltage?
The SMAJ30CAE3/TR13 exhibits a maximum standby leakage current (ID) of 1 µA when biased at its reverse standoff voltage of 30 V, as specified in the Microsemi MSC0270A datasheet. This ultra-low leakage ensures minimal power loss and no measurable impact on precision analog circuits, sensor bias networks, or battery-powered systems where quiescent current is critical.
What package type and mounting standard does SMAJ30CAE3/TR13 use?
SMAJ30CAE3/TR13 uses the DO-214AC (SMA) surface-mount package with C-bend leads and RoHS-compliant matte-tin plating, qualified per MIL-STD-750 method 2026. Its footprint matches JEDEC standard SMA layouts, and it is supplied on 12 mm tape in 750-unit 7-inch reels (TR13 designation). The SMAJ30CAE3/TR13 requires no dry pack per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity.
SMAJ30CAE3/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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)
SMAJ30CAE3/TR13 FAQ
1.How can I place an order for SMAJ30CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CAE3/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 SMAJ30CAE3/TR13 reliable?
The price and inventory of SMAJ30CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ30CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CAE3/TR13?
SMAJ30CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CAE3/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 SMAJ30CAE3/TR13?
For technical support, including SMAJ30CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ30CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CAE3/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 SMAJ30CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ30CAE3/TR13?
All SMAJ30CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CAE3/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 SMAJ30CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ30CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CAE3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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