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Microchip Technology SMAJ13E3/TR13
- Part No.:
- SMAJ13E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13E3/TR13.pdf
- Description:
- TVS DIODE 13VWM 23.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,445
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Product details
Overview
SMAJ13E3/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 13 V standoff voltage (VWM), 14.4 V minimum breakdown voltage (VBR), and 23.8 V maximum clamping voltage (VC) at 21.0 A peak pulse current - deployed for ESD/EFT protection in DC power rails and signal lines of industrial control modules.
For engineers reviewing the SMAJ13E3/TR13 datasheet, SMAJ13E3/TR13 pinout, SMAJ13E3/TR13 application, or SMAJ13E3/TR13 equivalent, key selection criteria include verified clamping performance under IEC61000-4-2/4-4, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR13 = 7-inch reel, 750 pcs), and compatibility with standard FR4 PCB footprints per JEDEC MS-013.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp: when reverse voltage exceeds VBR (14.4 V min @ 1 mA), it avalanches to limit transient energy within <100 ps response time, clamping to ≤23.8 V at 21.0 A. Its thermal resistance is 15 °C/W junction-to-lead, enabling reliable dissipation on standard 1 oz Cu FR4 layouts.
The device complies with IEC61000-4-2 Level 4 (±15 kV contact), IEC61000-4-4 (40 A/m EFT), and secondary lightning per IEC61000-4-5 (42 Ω source, Class 4 up to 12 V VWM). It is not bidirectional - no "C" or "CA" suffix - and features cathode band marking with void-free UL94V-0 epoxy body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; sets DC rail compatibility for 12 V systems. |
| VBR min @ IBR | 14.4 V @ 1 mA - Confirmed avalanche initiation threshold; ensures robust margin above VWM. |
| VC @ IPP | 23.8 V @ 21.0 A - Clamped voltage during 10/1000 µs surge; defines protected IC's maximum stress level. |
| PPP | 500 W - Peak pulse power rating at 25 °C; validated per Figure 1 for 10/1000 µs waveform. |
| IPP | 21.0 A - Corresponding peak current at VC; used to size series impedance for targeted surge energy absorption. |
| ID @ VWM | 1 µA - Reverse leakage at 13 V; negligible loading on low-power sensor or logic supply rails. |
| TJ range | –65 °C to +150 °C - Full operational and storage temperature range; supports automotive under-hood and industrial ambient use. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free UL94V-0 epoxy body with C-bend (modified J-bend) matte-tin plated leads. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or lowest potential node; completes shunt path during transient. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or RS-485 bus); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per MIL-STD-750 Method 2026; eliminates lead content while maintaining solderability at 260 °C for 10 s. |
| Tape-and-reel packaging | TR13 = EIA-481-1-A compliant 12 mm tape, 750 pcs per 7-inch reel; optimized for automated SMT placement. |
| IEC61000-4-5 Class 4 compliance | Validated for secondary lightning surges with 42 Ω source impedance up to 12 V VWM; SMAJ13E3/TR13 meets Class 4 requirements per specification table. |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B; enables immediate reflow without baking preconditioning. |
| Thermal resistance | 15 °C/W junction-to-lead; enables stable 5 W steady-state dissipation at 75 °C lead temperature on recommended footprint. |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input channels in programmable logic controllers exposed to inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between channel and ground to clamp transients before they reach input buffer ICs. Use Value: Limits voltage to ≤23.8 V during 21 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs downstream. |
Use Scenario: 12 V power rail feeding microcontroller, CAN transceiver, and sensor interfaces in BCM units subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V distribution net, upstream of LDO regulators and PMICs. Use Value: Withstands 500 W surges per IEC61000-4-5 and maintains <1 µA leakage, avoiding battery drain in always-on vehicle modules. |
| RS-485 Communication Port | DC Power Supply Input Stage |
Use Scenario: Differential data lines (A/B) of industrial RS-485 transceivers connected to long cables susceptible to ESD and induced RF. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, providing asymmetric clamping. Use Value: Sub-100 ps response ensures clamping before transceiver input stages are overstressed; 23.8 V clamp preserves common-mode range integrity. |
Use Scenario: Input stage of 12 V wall adapter or DC-DC converter front-end, where AC-line transients couple into low-voltage DC output. IC Role / Device Role / Timing Role: First-line shunt protector between DC input and bulk capacitor, diverting surge energy to ground before filtering stage. Use Value: 500 W rating handles repetitive switching transients; 15 °C/W thermal resistance supports sustained operation at 75 °C board temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Same VWM, VBR, VC, and PPP, but lacks "e3" RoHS plating and "TR13" tape-and-reel packaging; uses SnPb terminations. | Not suitable for RoHS-compliant production or automated SMT lines requiring lead-free assembly. | Select SMAJ13A only for legacy repair, non-RoHS prototyping, or environments where SnPb soldering remains approved. |
| SMBJ13A | Same electrical specs but in larger DO-214AA (SMB) package; 600 W PPP rating; higher thermal mass and 12 °C/W junction-to-lead resistance. | Better thermal handling for high-duty-cycle surges; requires larger PCB footprint and different pad layout. | Choose SMBJ13A when board space allows and enhanced thermal endurance is prioritized over miniaturization. |
Compared with SMAJ13A and SMBJ13A, SMAJ13E3/TR13 uniquely combines RoHS compliance, standardized 7-inch tape-and-reel delivery, and DO-214AC footprint - making it optimal for volume SMT manufacturing of compact industrial and automotive electronics where regulatory and assembly constraints are binding.
Availability
SMAJ13E3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, RS-485 communication ports, and DC power supply input stages requiring stable component supply across multi-year production cycles.
Supply support for SMAJ13E3/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 clamping performance in the industry-standard DO-214AC footprint.
FAQ
What is the clamping voltage of SMAJ13E3/TR13 at its rated peak pulse current?
The SMAJ13E3/TR13 has a maximum clamping voltage (VC) of 23.8 V at 21.0 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Microsemi's MSC0270A datasheet, ensuring protected downstream circuitry sees no more than 23.8 V during surge events. The SMAJ13E3/TR13 achieves this with sub-100 ps response time in unidirectional mode.
Is SMAJ13E3/TR13 RoHS compliant and what does the "e3" suffix indicate?
Yes, SMAJ13E3/TR13 is RoHS compliant: the "e3" suffix denotes matte-tin plating per MIL-STD-750 Method 2026, eliminating lead content while maintaining full solderability at 260 °C for 10 seconds. This compliance is verified in Microsemi's official documentation and confirmed by third-party material declarations. The SMAJ13E3/TR13 meets EU RoHS Directive 2011/65/EU requirements for restricted substances.
What package type and footprint does SMAJ13E3/TR13 use?
SMAJ13E3/TR13 uses the DO-214AC (SMA) surface-mount package with C-bend leads, matching JEDEC MS-013 outline dimensions (though slightly oversized per note 1 on page 5). Its recommended PCB pad layout follows Microsemi's documented footprint: 1.70–2.26 mm length (A), 3.99–4.50 mm width (B), and 2.57–2.79 mm height (C). The SMAJ13E3/TR13 is not compatible with DO-214AA (SMB) or DO-214AB (SMC) footprints.
Does SMAJ13E3/TR13 meet IEC61000-4-5 for lightning surge protection?
Yes, SMAJ13E3/TR13 is rated for secondary lightning protection per IEC61000-4-5 with 42 Ω source impedance up to Class 4 (VWM ≤ 12 V). While its VWM is 13 V, it remains applicable in Class 4 designs where margin and layout controls ensure effective energy diversion. The SMAJ13E3/TR13 also fully complies with IEC61000-4-2 (ESD ±15 kV contact) and IEC61000-4-4 (EFT 40 A/m) standards as specified in the datasheet.
What is the maximum steady-state power dissipation for SMAJ13E3/TR13 on a standard PCB?
SMAJ13E3/TR13 dissipates up to 1.56 W continuously at 25 °C ambient temperature when mounted on a standard FR4 board with 1 oz copper and Microsemi's recommended footprint. At 75 °C lead temperature (TL), its steady-state rating rises to 5 W - enabled by its 15 °C/W junction-to-lead thermal resistance. These values are measured and published in the "Maximum Ratings" section of the SMAJ5.0–170CA, e3 datasheet (MSC0270A, Rev L).
SMAJ13E3/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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 23.8V
- Current - Peak Pulse (10/1000µs):
- 21A
- 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)
SMAJ13E3/TR13 FAQ
1.How can I place an order for SMAJ13E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13E3/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 SMAJ13E3/TR13 reliable?
The price and inventory of SMAJ13E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ13E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13E3/TR13?
SMAJ13E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13E3/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 SMAJ13E3/TR13?
For technical support, including SMAJ13E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13E3/TR13 requirements.
6.How does Aetrix verify that SMAJ13E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ13E3/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 SMAJ13E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ13E3/TR13?
All SMAJ13E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13E3/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 SMAJ13E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ13E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13E3/TR13 Tags
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