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Microchip Technology SMAJ150E3/TR13
- Part No.:
- SMAJ150E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150E3/TR13.pdf
- Description:
- TVS DIODE 150VWM 268VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,511
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Product details
Overview
SMAJ150E3/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 150 V standoff voltage (VWM), 167 V minimum breakdown voltage (VBR), and 268 A peak pulse current (IPP). It clamps transients to ≤243 V and is RoHS-compliant, used for secondary lightning and ESD protection in industrial power supplies.
For engineers reviewing the SMAJ150E3/TR13 datasheet, SMAJ150E3/TR13 pinout, SMAJ150E3/TR13 application, or SMAJ150E3/TR13 equivalent, key selection criteria include clamping voltage under 243 V, unidirectional polarity with cathode band marking, 150 V working voltage compatibility, and tape-and-reel packaging (TR13 = 2500/reel) for automated assembly.
Technical Context
This TVS operates as a fast-acting silicon avalanche diode, triggered when reverse voltage exceeds VBR (167 V min), entering low-impedance clamping mode within <100 ps. Its unidirectional structure provides asymmetric conduction-forward surge rating of 40 A (8.3 ms half-sine) and reverse standby leakage <2.1 µA at 150 V.
Thermal design relies on low junction-to-lead thermal resistance (15 °C/W) and FR4 PCB mounting with recommended footprint; steady-state dissipation is 5 W at lead temperature (TL) of 75 °C. It meets IEC61000-4-2 (ESD), -4-4 (EFT), and -4-5 (lightning, 42 Ω source) Class 1–4 per voltage grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 150 V - Maximum continuous reverse operating voltage before clamping begins. |
| VBR (Min @ IBR) | 167 V @ 1 mA - Ensures reliable triggering above system nominal voltage with margin. |
| VC @ IPP | 243 V @ 268 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge. |
| PPP | 500 W - Peak pulse power handling capability defines transient energy absorption capacity. |
| IPP | 268 A - Peak current rating determines survivability against standardized lightning surges. |
| ID @ VWM | <2.1 µA - Ultra-low leakage preserves efficiency and prevents false triggering in high-impedance circuits. |
| TJ Range | −65 °C to +150 °C - Enables operation in extended industrial and automotive under-hood environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free epoxy body (UL94V-0), C-bend leads with matte-tin plating. Cathode indicated by band; no marking on bidirectional variants (not applicable to SMAJ150E3/TR13).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Provides return path for surge current; must be routed with minimal inductance to earth/chassis ground. |
| Cathode | High-side connection to line/voltage rail | Marked by band; connects to input rail being protected; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables robust protection against IEC61000-4-5 lightning surges up to 268 A without degradation. |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU; matte-tin plating ensures solderability and eliminates lead contamination risk. |
| <100 ps response time | Clamps ESD events (IEC61000-4-2 ±8 kV contact) before sensitive CMOS/BiCMOS inputs are damaged. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel supports high-volume SMT placement with JIS/EIA-481-1-A compliance. |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to reflow; simplifies manufacturing and reduces process cost. |
Applications
| Industrial Power Supply Input Protection | Telecom DC Feeder Line Protection |
|---|---|
Use Scenario: 48 V DC telecom power feeders exposed to induced surges from nearby AC lines or lightning coupling. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +48 V rail and chassis ground to clamp positive transients. Use Value: With VWM = 150 V, SMAJ150E3/TR13 avoids conduction during normal 48 V operation while clamping surges to ≤243 V, protecting upstream DC-DC converters. |
Use Scenario: Industrial programmable logic controller (PLC) analog input modules receiving 0–10 V or 4–20 mA signals over long cables. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and switching transients before signal conditioning circuitry. Use Value: Sub-100 ps response ensures clamping occurs before 100 ns ESD pulses reach precision op-amps or ADCs, preserving measurement integrity. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter DC Link |
Use Scenario: 300–400 V DC bus in variable-frequency drives subjected to inductive kickback from IGBT switching. IC Role / Device Role / Timing Role: Parallel-mounted unidirectional TVS absorbs repetitive 500 W transients across bus rails. Use Value: 500 W rating and 268 A IPP allow repeated suppression of commutation spikes without thermal runaway or parameter drift. |
Use Scenario: Solar PV string inverters where DC link voltages reach 600–1000 V, requiring staged protection. IC Role / Device Role / Timing Role: First-stage TVS on lower-voltage auxiliary rails (e.g., gate driver supply) to prevent cascading failure. Use Value: 150 V VWM matches typical 12–24 V control rail levels; clamping at 243 V prevents latch-up in isolated gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A-E3/5A (Vishay) | Same VWM (150 V), VBR (167 V min), and VC (243 V); identical DO-214AC package and RoHS compliance. | No functional difference; validated for same IEC61000-4-2/4-4/4-5 classes. | Select for dual-source procurement or regional distributor availability. |
| 1.5SMC150A (ON Semiconductor) | Same electrical specs but in larger DO-214AB (SMB) package; 1.5 kW rating implies higher single-pulse tolerance, not sustained duty. | Requires PCB footprint change; better suited for infrequent high-energy surges rather than repetitive industrial transients. | Choose only if board layout allows SMB pad revision and surge profile demands >500 W single-event headroom. |
Compared with SMAJ150E3/TR13, SMAJ150A-E3/5A offers identical performance and drop-in compatibility, while 1.5SMC150A trades surface-mount compactness for higher single-pulse margin at the cost of footprint and thermal cycling reliability in automated assembly.
Availability
SMAJ150E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeder protection, and motor drive DC bus applications requiring stable component supply, RoHS compliance, and tape-and-reel automation support.
Supply support for SMAJ150E3/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 for ruggedized transient suppression in harsh environments-emphasizing fast response, repeatable clamping, and extended temperature operation without derating.
FAQ
What is the clamping voltage of SMAJ150E3/TR13 under maximum rated surge current?
The SMAJ150E3/TR13 has a maximum clamping voltage (VC) of 243 V when subjected to its rated peak pulse current (IPP) of 268 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per Microsemi's MSC0270A datasheet, ensuring predictable overvoltage limiting for downstream circuitry.
Is SMAJ150E3/TR13 unidirectional or bidirectional, and how is polarity identified?
SMAJ150E3/TR13 is a unidirectional TVS diode. Polarity is identified by a cathode band on the device body-this marks the cathode terminal, which connects to the protected voltage rail, while the anode connects to ground. Bidirectional versions use a "CA" suffix (e.g., SMAJ150CA), which SMAJ150E3/TR13 does not have.
Does SMAJ150E3/TR13 require moisture-sensitive handling or baking before reflow soldering?
No. SMAJ150E3/TR13 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without dry-packaging or pre-baking-reducing manufacturing complexity and cost.
What IEC standards does SMAJ150E3/TR13 comply with for surge immunity testing?
SMAJ150E3/TR13 is verified for compliance with IEC61000-4-2 (ESD ±8 kV contact), IEC61000-4-4 (EFT ±2 kV), and IEC61000-4-5 (lightning surge, 42 Ω source impedance) up to Class 1 (SMAJ150A qualifies through 150 V). Its 268 A IPP rating directly supports Class 1 secondary lightning protection per this standard.
What is the meaning of "TR13" in SMAJ150E3/TR13?
"TR13" indicates tape-and-reel packaging per EIA-481-1-A standard, with 2500 units per 13-inch reel. This format enables automated pick-and-place assembly and is distinct from TR (750/reel) or bulk packaging. The "E3" suffix confirms RoHS-compliant matte-tin plating.
SMAJ150E3/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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 268V
- Current - Peak Pulse (10/1000µs):
- 1.9A
- 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)
SMAJ150E3/TR13 FAQ
1.How can I place an order for SMAJ150E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150E3/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 SMAJ150E3/TR13 reliable?
The price and inventory of SMAJ150E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ150E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150E3/TR13?
SMAJ150E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150E3/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 SMAJ150E3/TR13?
For technical support, including SMAJ150E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150E3/TR13 requirements.
6.How does Aetrix verify that SMAJ150E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ150E3/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 SMAJ150E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ150E3/TR13?
All SMAJ150E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150E3/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 SMAJ150E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ150E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150E3/TR13 Tags
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