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Microchip Technology SMAJ30AE3/TR13
- Part No.:
- SMAJ30AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30AE3/TR13.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,526
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Product details
Overview
SMAJ30AE3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust ESD, EFT, and secondary lightning surge protection in power and signal lines. It features a 30 V reverse standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 48.4 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPP), and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies, automotive body electronics, and telecom interface circuits.
For engineers reviewing the SMAJ30AE3/TR13 datasheet, SMAJ30AE3/TR13 pinout, SMAJ30AE3/TR13 application, or SMAJ30AE3/TR13 equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, RoHS-compliant matte-tin plating, 100% surge screening option (MA prefix), IEC61000-4-2/4-4/4-5 compliance, and verified clamping performance under 12 Ω source impedance Class 1 secondary lightning conditions.
Technical Context
This TVS operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<100 ps theoretical turn-on) and low thermal resistance (15 °C/W junction-to-lead). Its silicon junction design enables stable clamping across -65 °C to +150 °C operating temperature range while maintaining <1 μA standby leakage at rated VWM.
The device uses a void-free thermosetting epoxy case (UL94V-0) with C-bend leads, mounted on FR4 PCBs using the recommended footprint (0.194–0.216" length, 0.100–0.110" width). It delivers 5 W steady-state power dissipation at 75 °C lead temperature and supports 40 A forward surge current (8.3 ms half-sine) with ≤3.50 V forward voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 30 V - Maximum continuous reverse voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (Min @ IBR) | 33.3 V @ 1 mA - Confirmed avalanche onset threshold; ensures reliable triggering above system transients. |
| VC @ IPP | 48.4 V @ 10.3 A - Clamped voltage during 10/1000 µs surge; protects downstream ICs rated ≤45 V absolute max. |
| PPP | 500 W - Peak pulse power handling per standard waveform; validated for repeated surges at 0.01% duty cycle. |
| IPP | 10.3 A - Peak current supported at VC; correlates to IEC61000-4-5 Class 1 (12 Ω source) surge level. |
| ID @ VWM | <1 μA - Ultra-low leakage at rated standoff; prevents power loss or false triggering in high-impedance bias networks. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with 0.216" max length; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with cathode-indicating band; C-bend tin-lead or RoHS-compliant matte-tin plated leads; 0.064 g weight; moisture sensitivity level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to signal/power rail requiring overvoltage clamping; referenced to ground via cathode path. |
| Cathode | Ground reference terminal | Connected to system ground plane; provides low-impedance return path for surge current; marked by band. |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000-4-5 Class 1 compliance | Validated for secondary lightning surges with 12 Ω source impedance up to 1 kV open-circuit test level. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required pre-reflow. |
| Fast response time | <100 ps theoretical turn-on enables suppression of sub-nanosecond ESD events before IC damage occurs. |
| High surge reliability | Optional MA-prefix avionics screening includes 10× -55 °C to +125 °C thermal cycling and 3× surge testing. |
| Stable thermal performance | 15 °C/W junction-to-lead thermal resistance ensures predictable power derating on standard FR4 layouts. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp surges before they reach DC-DC converter ICs. Use Value: Limits transient voltage to 48.4 V, protecting 40 V-rated buck controllers and ensuring immunity to ISO 7637-2 Pulse 1/2a/5a. | Use Scenario: LIN bus transceiver power line in door module subjected to ESD and battery reversal events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC rail to absorb ±8 kV contact ESD (IEC61000-4-2) and clamp induced spikes during antenna coupling. Use Value: Sub-100 ps response prevents latch-up in LIN PHY ICs; 30 V VWM accommodates 27 V max battery swing. |
| Telecom Ethernet Port Protection | Medical Sensor Interface |
Use Scenario: Secondary-side 12 V bias rail feeding PoE-powered Ethernet PHY on network switch board. IC Role / Device Role / Timing Role: TVS on isolated DC output to suppress coupled surges from primary-side lightning strikes per IEC61000-4-5. Use Value: 500 W rating handles 10/1000 µs surges up to 10.3 A; 48.4 V clamping preserves 3.3/5 V logic integrity downstream. | Use Scenario: 5 V analog front-end powering precision ADC and op-amp in portable patient monitor. IC Role / Device Role / Timing Role: Low-leakage TVS on sensor supply rail to prevent ESD-induced offset drift or saturation during clinical handling. Use Value: <1 μA standby current avoids measurement error; 33.3 V breakdown ensures no conduction during normal 5 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3/TR13 | Same electrical specs but with halogen-free epoxy (HF suffix); identical DO-214AC package and pinout. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy. | Direct substitution where HF material requirement applies; no layout or validation changes needed. |
| SMBJ30A-E3/52 | Lower 400 W peak power rating; same VWM/VBR/VC but 8.3 A IPP; SMB package (larger footprint, higher thermal mass). | Less robust for high-energy surges; suitable only where IEC61000-4-5 Class 2 (not Class 1) is sufficient. | Use only if system-level surge testing confirms 400 W adequacy; requires PCB pad redesign due to SMB package size. |
Compared with SMAJ30AE3/TR13, SMAJ30AHE3/TR13 offers identical protection performance with halogen-free materials, while SMBJ30A-E3/52 trades 20% peak power for larger package size and reduced surge margin - making the original part optimal for compact, Class 1-compliant designs.
Availability
SMAJ30AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom interface circuits requiring stable component supply, RoHS compliance, and IEC61000-4-5 Class 1 surge immunity.
Supply support for SMAJ30AE3/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-constrained, high-surge environments - emphasizing fast response, repeatable clamping, and rugged packaging for mission-critical power and interface protection.
FAQ
What is the clamping voltage of SMAJ30AE3/TR13 at its rated peak pulse current?
The SMAJ30AE3/TR13 has a maximum clamping voltage (VC) of 48.4 V at 10.3 A peak pulse current (IPP) under the 10/1000 µs waveform. This value is measured per Figure 2 in the official Microsemi datasheet MSC0270A and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ30AE3/TR13 maintains this clamping performance across its full operating temperature range.
Is SMAJ30AE3/TR13 unidirectional or bidirectional, and how is polarity identified?
SMAJ30AE3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number. Polarity is marked by a cathode band on the device body - the banded end connects to system ground, while the anode connects to the protected line. This configuration allows it to conduct only during positive transients relative to ground, unlike bidirectional variants which suppress both polarities.
Does SMAJ30AE3/TR13 meet IEC61000-4-5 for secondary lightning protection?
Yes, SMAJ30AE3/TR13 is certified for IEC61000-4-5 secondary lightning protection with 12 Ω source impedance at Class 1 level (1 kV open-circuit test voltage), as explicitly stated in the Microsemi datasheet. Its 500 W peak pulse power and 48.4 V clamping voltage ensure compliance without external circuit modifications. The SMAJ30AE3/TR13 is not rated for Class 1 with 42 Ω source impedance - that requires lower-voltage variants like SMAJ12A or SMAJ16A.
What is the maximum steady-state power dissipation for SMAJ30AE3/TR13 on a standard PCB?
When mounted on an FR4 printed circuit board with 1 oz copper and the recommended footprint, SMAJ30AE3/TR13 dissipates up to 5 W at a lead temperature (TL) of 75 °C, or 1.56 W at ambient temperature (TA) of 25 °C. These values derive from its 15 °C/W junction-to-lead thermal resistance and are critical for thermal design validation. Exceeding these limits risks parametric shift or premature failure of the SMAJ30AE3/TR13.
Can SMAJ30AE3/TR13 be used in place of SMAJ30A without modification?
Yes, SMAJ30AE3/TR13 is a direct replacement for SMAJ30A, differing only in RoHS-compliant matte-tin plating ("e3" suffix) and tape-and-reel packaging ("TR13"). All electrical parameters - including VWM, VBR, VC, IPP, and thermal ratings - are identical. No PCB layout, solder profile, or system validation changes are required when substituting SMAJ30AE3/TR13 for SMAJ30A in existing designs.
SMAJ30AE3/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:
- 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)
SMAJ30AE3/TR13 FAQ
1.How can I place an order for SMAJ30AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30AE3/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 SMAJ30AE3/TR13 reliable?
The price and inventory of SMAJ30AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ30AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ30AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30AE3/TR13?
SMAJ30AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30AE3/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 SMAJ30AE3/TR13?
For technical support, including SMAJ30AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ30AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ30AE3/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 SMAJ30AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ30AE3/TR13?
All SMAJ30AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30AE3/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 SMAJ30AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ30AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30AE3/TR13 Tags
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