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Microchip Technology SMAJ6.5E3/TR13
- Part No.:
- SMAJ6.5E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5E3/TR13.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,514
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Product details
Overview
SMAJ6.5E3/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 6.5 V working standoff voltage (VWM), 7.22 V minimum breakdown voltage (VBR), 12.3 V maximum clamping voltage (VC) at 40.7 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supply input stages to safeguard rectifier diodes and downstream regulators.
For engineers reviewing the SMAJ6.5E3/TR13 datasheet, SMAJ6.5E3/TR13 pinout, SMAJ6.5E3/TR13 application, or SMAJ6.5E3/TR13 equivalent, key selection criteria include its RoHS-compliant "e3" termination, TR13 tape-and-reel packaging (2500 units/reel), DO-214AC (SMA) package compatibility, and IEC61000-4-2/4-4/4-5 compliance for ESD, EFT, and secondary lightning surge protection.
Technical Context
This TVS operates as a silicon avalanche diode with unidirectional polarity (cathode-banded), exhibiting sub-nanosecond response time (<100 ps theoretical) and low dynamic impedance during transient events. Its clamping behavior is defined under standardized 10/1000 µs double-exponential surge conditions, with thermal resistance of 15 °C/W junction-to-lead when soldered to copper.
The device is rated for continuous operation from –65 °C to +150 °C, supports 40 A forward surge current (8.3 ms half-sine), and maintains <1 µA standby leakage at VWM. Its DO-214AC package uses void-free thermosetting epoxy (UL94V-0) and matte-tin plating compliant with MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit's normal DC rail. |
| VBR min @ IBR | 7.22 V @ 10 mA - Minimum voltage at which avalanche breakdown initiates; ensures reliable triggering above nominal rail. |
| VC @ IPP | 12.3 V @ 40.7 A - Clamped voltage during 500 W surge; defines worst-case overvoltage seen by downstream ICs. |
| PPP | 500 W @ 10/1000 µs - Peak surge power handling capacity; validates suitability for IEC61000-4-5 Class 4 (12 Ω source) events. |
| ID @ VWM | <1 µA - Reverse leakage current at standoff voltage; negligible loading on 5–6 V logic or sensor supply rails. |
| TJ Range | –65 °C to +150 °C - Operating and storage temperature range; supports automotive under-hood and industrial control environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, C-bend leads, RoHS-compliant matte-tin plating, UL94V-0 epoxy body, 0.064 g weight. Cathode indicated by band; no marking on bidirectional variants (not applicable to SMAJ6.5E3/TR13).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction loop during positive transients on cathode side. |
| Cathode | High-side connection point | Connected to protected line (e.g., +5 V rail); conducts avalanche current to anode when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant termination | "e3" suffix denotes annealed matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity-no dry-pack required. |
| Standardized tape-and-reel packaging | TR13 suffix indicates 13-inch reel, 2500 units, EIA-481-1-A compliant-enables automated SMT placement without manual handling. |
| IEC61000-4-5 secondary lightning compliance | Validated for Class 4 (12 Ω source) up to 12 A surge current-meets EN 61000-4-5 requirements for AC/DC power entry protection. |
| Fast transient response | <100 ps theoretical turn-on time-limits voltage overshoot during nanosecond-scale ESD events (IEC61000-4-2 ±8 kV contact discharge). |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) Supply Rail |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp transients before they reach upstream DC-DC converter ICs. Use Value: Limits clamped voltage to 12.3 V during 40.7 A surges-prevents overvoltage damage to 36 V-rated input capacitors and 28 V max-input buck controllers. |
Use Scenario: 12 V battery-fed microcontroller supply in BCM subjected to ISO 7637-2 Pulse 1 (inductive kickback) and Pulse 3a/b (switching noise). IC Role / Device Role / Timing Role: Primary suppression element on MCU VDD rail, positioned adjacent to LDO regulator input to absorb fast-rising transients. Use Value: Sub-100 ps response ensures clamping occurs before 100 ns propagation delay of typical automotive LDOs-maintains regulated output stability. |
| RS-485 Transceiver Data Line Protection | USB Host Port VBUS Line Protection |
Use Scenario: Differential data lines of isolated RS-485 transceivers in factory automation networks subject to cable-induced EFT bursts. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, suppressing common-mode surges without distorting differential signaling. Use Value: 12.3 V clamping voltage stays below RS-485 receiver absolute maximum rating (±15 V), preserving signal integrity during IEC61000-4-4 ±2 kV burst tests. |
Use Scenario: VBUS line of USB 2.0 host port in embedded medical device exposed to accidental hot-plug ESD events. IC Role / Device Role / Timing Role: Single-point TVS between VBUS and GND, absorbing ±8 kV contact discharge per IEC61000-4-2 before reaching USB switch or power delivery controller. Use Value: 1 µA leakage at 5 V ensures no measurable impact on USB suspend current budget (<500 µA), maintaining compliance with USB 2.0 specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-E3/5A (Vishay) | Identical VWM (6.5 V), VBR min (7.22 V), VC (12.3 V), and PPP (500 W); same DO-214AC package and RoHS "E3" marking. | No functional difference; validated for identical IEC standards and thermal derating curves. | Select when dual-sourcing is required or Vishay-specific logistics apply; full form-fit-function replacement. |
| 1.5SMC6.5A (ON Semiconductor) | Same VWM, VBR, and VC, but rated for 1500 W peak pulse power (10/1000 µs) and uses larger DO-214AB (SMC) package (7.11 × 6.22 mm vs. SMAJ's 4.57 × 2.79 mm). | Higher surge margin suits high-energy industrial motor drives; larger footprint requires PCB redesign. | Choose only if system-level surge testing exceeds 500 W or existing layout accommodates SMC outline. |
Compared with SMAJ6.5E3/TR13, SMAJ6.5A-E3/5A offers identical electrical and mechanical performance for drop-in qualification, while 1.5SMC6.5A provides higher surge headroom at the cost of board space and thermal interface redesign.
Availability
SMAJ6.5E3/TR13 is available at Aetrix Electronics and suitable for industrial PLC power inputs, automotive BCM supply rails, RS-485 data line protection, and USB host VBUS line protection requiring stable component supply across extended production cycles.
Supply support for SMAJ6.5E3/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 space-constrained, high-surge environments-emphasizing fast response, repeatable clamping, and robust thermal performance in DO-214AC packages.
FAQ
What is the clamping voltage of SMAJ6.5E3/TR13 under a 40.7 A surge?
The SMAJ6.5E3/TR13 exhibits a maximum clamping voltage (VC) of 12.3 V when subjected to a 40.7 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions defined in the Microsemi datasheet and represents the worst-case overvoltage imposed on protected circuitry during a 500 W transient event. The SMAJ6.5E3/TR13 maintains this clamping performance across its full operating temperature range.
Is SMAJ6.5E3/TR13 unidirectional or bidirectional?
SMAJ6.5E3/TR13 is a unidirectional transient voltage suppressor, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only when the cathode is biased positively relative to the anode-making it suitable for DC rail protection where polarity is fixed. Bidirectional variants (e.g., SMAJ6.5CAE3/TR13) would be required for AC or floating signal line applications.
Does SMAJ6.5E3/TR13 meet IEC61000-4-5 Class 4 requirements?
Yes, SMAJ6.5E3/TR13 is certified for IEC61000-4-5 secondary lightning protection with a 12 Ω source impedance at Class 4 level (up to 12 A surge current). This classification is explicitly stated in the Microsemi datasheet for all SMAJ5.0–SMAJ12A unidirectional parts. The SMAJ6.5E3/TR13 achieves this through its 500 W peak pulse power rating and low clamping voltage under standardized surge waveforms.
What does the "TR13" suffix indicate in SMAJ6.5E3/TR13?
The "TR13" suffix denotes tape-and-reel packaging on a 13-inch reel containing 2500 units, compliant with EIA-481-1-A standards. This format enables automated pick-and-place assembly in high-volume SMT manufacturing. The SMAJ6.5E3/TR13 also carries the "e3" designation confirming RoHS-compliant matte-tin plating and Level 1 moisture sensitivity-eliminating bake requirements prior to reflow.
What is the maximum steady-state power dissipation of SMAJ6.5E3/TR13 on FR4 PCB?
When mounted on a standard FR4 printed circuit board with 1 oz copper and the recommended footprint, SMAJ6.5E3/TR13 dissipates up to 1.56 W continuously at ambient temperature (TA = 25 °C), or 5 W at lead temperature (TL = 75 °C). These ratings derive from its thermal resistance of 80 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), respectively-critical for thermal design validation in enclosed industrial enclosures.
SMAJ6.5E3/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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 40.7A
- 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)
SMAJ6.5E3/TR13 FAQ
1.How can I place an order for SMAJ6.5E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5E3/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 SMAJ6.5E3/TR13 reliable?
The price and inventory of SMAJ6.5E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ6.5E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5E3/TR13?
SMAJ6.5E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5E3/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 SMAJ6.5E3/TR13?
For technical support, including SMAJ6.5E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5E3/TR13 requirements.
6.How does Aetrix verify that SMAJ6.5E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5E3/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 SMAJ6.5E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ6.5E3/TR13?
All SMAJ6.5E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5E3/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 SMAJ6.5E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ6.5E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5E3/TR13 Tags
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