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Microchip Technology SMAJ30E3/TR13
- Part No.:
- SMAJ30E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30E3/TR13.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,426
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Product details
Overview
SMAJ30E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 30 V working standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), and 48.4 V maximum clamping voltage (VC) at 10.3 A peak pulse current - used to protect power rails and I/O lines in industrial power supplies and telecom interfaces against ESD, EFT, and secondary lightning surges.
For engineers reviewing the SMAJ30E3/TR13 datasheet, SMAJ30E3/TR13 pinout, SMAJ30E3/TR13 application, or SMAJ30E3/TR13 equivalent, key selection criteria include verified clamping performance under IEC61000-4-2/4-4/4-5 compliance, RoHS-compliant matte-tin plating, tape-and-reel packaging (750 pcs/reel), and thermal resistance of 15 °C/W junction-to-lead on FR4 PCB.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp, triggering when reverse voltage exceeds VBR = 33.3 V (tested at IBR = 1 mA), limiting transient energy to ≤48.4 V at 10.3 A. Its <100 ps theoretical response time enables effective suppression of sub-nanosecond ESD events per IEC61000-4-2 Level 4 (±15 kV contact).
Designed for surface-mount assembly on standard FR4 boards with recommended footprint, it delivers 500 W peak pulse power dissipation at 25 °C, derates linearly above 25 °C per the published derating curve, and maintains stable standby leakage (<1 μA at VWM = 30 V) across –65 °C to +150 °C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail protection margin. |
| VBR min | 33.3 V @ 1 mA - Minimum breakdown threshold; ensures reliable turn-on above nominal system voltage. |
| VC @ IPP | 48.4 V @ 10.3 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPP | 500 W - Peak pulse power handling capability; supports robust surge immunity in industrial environments. |
| ID max | <1 μA @ 30 V - Ultra-low leakage current; prevents unintended loading of high-impedance signal or bias networks. |
| tclamp | <100 ps theoretical - Sub-nanosecond response enables protection against fast ESD transients (IEC61000-4-2). |
| TJ range | –65 °C to +150 °C - Wide junction temperature range supports operation in harsh automotive and industrial enclosures. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant annealed matte-tin plating. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; completes shunt conduction path during overvoltage events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 30 V supply rail); carries full surge current to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required. |
| Tape-and-reel packaging | TR13 suffix indicates 2500 pcs per 13-inch reel per EIA-481-1-A standard - optimized for automated SMT placement. |
| IEC61000-4-5 compliance | Validated for secondary lightning protection (Class 1, 42 Ω source) up to SMAJ30A/CA - supports EN 61000-4-5 system-level testing. |
| Thermal performance | 15 °C/W junction-to-lead thermal resistance enables sustained 5 W steady-state dissipation at TL = 75 °C with proper PCB copper area. |
| Fast transient response | <100 ps theoretical turn-on time ensures clamping before sensitive ICs experience overstress in ESD events. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: 30 V DC input rail in DIN-rail mounted PLC power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp positive-going surges. Use Value: Limits transient voltage to ≤48.4 V, preventing damage to downstream DC-DC controllers and microcontrollers rated for 36 V absolute max. |
Use Scenario: RS-485 data line pair (A/B) in outdoor base station equipment subject to induced lightning surges. IC Role / Device Role / Timing Role: Paired SMAJ30E3/TR13 devices (one per line) referenced to common ground to suppress differential and common-mode transients. Use Value: Maintains signal integrity by clamping surges within 100 ps while adding only 0.064 g mass and no parasitic capacitance penalty vs. bidirectional alternatives. |
| Automotive Body Control Module (BCM) Sensor Inputs | Medical Equipment AC/DC Adapter Interface |
Use Scenario: 30 V sensor supply line feeding Hall-effect position sensors in engine bay environments. IC Role / Device Role / Timing Role: Single-point TVS on VSUPPLY net upstream of LDO regulator to absorb ISO 7637-2 pulse 1/2a/5a transients. Use Value: Withstands 40 A forward surge (8.3 ms half-sine) and clamps to 48.4 V, ensuring regulator input stays within safe SOA limits. |
Use Scenario: Secondary-side 30 V output of medical-grade AC/DC adapter connected to patient-monitoring analog front-end. IC Role / Device Role / Timing Role: Final-stage TVS on isolated 30 V bus to meet IEC 60601-1 4 kV surge immunity requirement. Use Value: Provides certified secondary lightning protection per IEC61000-4-5 (Class 1, 42 Ω) without compromising creepage/clearance due to compact SMA footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/5A (Vishay) | Identical VWM = 30 V, VBR min = 33.3 V, VC = 48.4 V @ 10.3 A; same DO-214AC package and RoHS plating. | No functional difference; validated for identical IEC61000-4-2/4-4/4-5 test profiles and thermal derating. | Select for multi-source procurement where Vishay qualification is mandated or preferred in existing BOMs. |
| 1.5SMC33A (ON Semiconductor) | VWM = 33 V (higher), VBR min = 36.7 V, VC = 53.3 V @ 9.4 A; same 500 W rating but higher clamping voltage. | Less margin for 30 V systems - clamps 4.9 V higher than SMAJ30E3/TR13, increasing risk of downstream overstress. | Use only if system VWM tolerance allows 33 V standoff and design can accommodate 53.3 V clamping. |
Compared with SMAJ30E3/TR13, SMAJ30A-E3/5A offers identical electrical and mechanical specs for drop-in sourcing flexibility, while 1.5SMC33A trades lower standby leakage for reduced voltage margin - requiring careful validation against 30 V rail tolerances and protected IC absolute maximum ratings.
Availability
SMAJ30E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface modules, and automotive body control units requiring stable component supply with RoHS-compliant, tape-and-reel packaging and IEC61000-4-5 Class 1 surge immunity.
Supply support for SMAJ30E3/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 designed specifically for surface-mount transient voltage suppression in space-constrained, high-surge environments - delivering 500 W pulse power in the compact DO-214AC footprint with guaranteed low-leakage and fast response.
FAQ
What is the clamping voltage of SMAJ30E3/TR13 at its rated peak pulse current?
The SMAJ30E3/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 and guaranteed per Microsemi's MSC0270A datasheet, defining the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMAJ30E3/TR13 unidirectional or bidirectional, and how is polarity marked?
SMAJ30E3/TR13 is a unidirectional TVS diode, with cathode polarity clearly indicated by a band on the device body. The "E3" suffix confirms RoHS-compliant matte-tin plating, and the absence of "C" or "CA" in the part number confirms unidirectional construction. This configuration provides asymmetric protection - conducting only during positive transients on the cathode side - making it ideal for DC rail protection where reverse voltage is not expected.
Does SMAJ30E3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ30E3/TR13 is validated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance at Class 1 level (up to SMAJ30A/CA), supporting 4 kV surge testing. Its 500 W peak pulse power rating and 48.4 V clamping voltage ensure compliant performance when implemented with proper PCB layout - including short traces to ground and adequate copper pour - as specified in Microsemi's application guidance.
What is the thermal resistance and maximum steady-state power dissipation of SMAJ30E3/TR13?
SMAJ30E3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and delivers 5 W steady-state power dissipation at lead temperature (TL) = 75 °C, or 1.56 W at ambient temperature (TA) = 25 °C when mounted on FR4 with the recommended footprint. These values are defined in the "Maximum Ratings" section of the MSC0270A datasheet and must be applied with appropriate derating above 25 °C per the published derating curve.
What does the "TR13" suffix indicate in SMAJ30E3/TR13?
"TR13" denotes tape-and-reel packaging per EIA-481-1-A standard, with 2500 units per 13-inch reel. This format is optimized for high-volume automated SMT assembly and ensures consistent orientation and spacing for pick-and-place machines. The "E3" portion confirms RoHS compliance via matte-tin plating, while "SMAJ30" specifies the 30 V standoff voltage variant in the Microsemi SMAJ family.
SMAJ30E3/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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SMAJ30E3/TR13 FAQ
1.How can I place an order for SMAJ30E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30E3/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 SMAJ30E3/TR13 reliable?
The price and inventory of SMAJ30E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ30E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30E3/TR13?
SMAJ30E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30E3/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 SMAJ30E3/TR13?
For technical support, including SMAJ30E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30E3/TR13 requirements.
6.How does Aetrix verify that SMAJ30E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ30E3/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 SMAJ30E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ30E3/TR13?
All SMAJ30E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30E3/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 SMAJ30E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ30E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30E3/TR13 Tags
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