My Inquiry
My Account
Microchip Technology SMAJ16E3/TR13
- Part No.:
- SMAJ16E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16E3/TR13.pdf
- Description:
- TVS DIODE 16VWM 28.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,697
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ16E3/TR13 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 16 V working peak standoff voltage (VWM), 17.8 V minimum breakdown voltage (VBR), 28.8 V maximum clamping voltage (VC) at 17.6 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supply input stages and Ethernet PHY interfaces.
For engineers reviewing the SMAJ16E3/TR13 datasheet, SMAJ16E3/TR13 pinout, SMAJ16E3/TR13 application, or SMAJ16E3/TR13 equivalent, key selection criteria include clamping performance under IEC61000-4-5 secondary lightning surge (12 Ω source, Class 2), RoHS-compliant matte-tin plating, DO-214AC package compatibility, and unidirectional polarity with cathode band marking.
Technical Context
This TVS operates as a silicon avalanche diode with sub-nanosecond response time (<100 ps theoretical), enabling effective suppression of ESD per IEC61000-4-2 (±8 kV contact), EFT per IEC61000-4-4 (±2 kV), and induced surges. Its unidirectional configuration provides forward conduction capability up to 40 A peak surge current (8.3 ms half-sine) while maintaining low standby leakage (<1 µA at 16 V).
The device is thermally rated for -65°C to +150°C operation, with 15°C/W junction-to-lead thermal resistance when soldered to FR4 PCB using the recommended footprint. Its void-free epoxy case meets UL94V-0 flammability standard and supports reflow soldering at 260°C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12–15 V systems. |
| VBR min @ IBR | 17.8 V @ 1 mA - Minimum avalanche onset voltage; ensures reliable triggering above normal operating transients. |
| VC @ IPP | 28.8 V @ 17.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress below 30 V absolute max ratings. |
| PPP | 500 W - Peak pulse power handling capacity; sustains 17.6 A surge without degradation under standardized waveform. |
| ID @ VWM | <1 µA - Reverse leakage current at 16 V; negligible loading on low-power sensor or logic circuits. |
| tclamp | <100 ps - Theoretical response time; enables protection against fast-rising ESD events before sensitive circuitry reacts. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for thermal dissipation and mechanical robustness. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy case, void-free, UL94V-0 rated; C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating; cathode indicated by band on body; no marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail); avalanche conduction occurs from cathode to anode when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables robust protection against IEC61000-4-5 secondary lightning surges (12 Ω source, Class 2) without derating at 25°C. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; eliminates dry pack requirement and supports lead-free reflow. |
| Unidirectional polarity | Supports forward conduction up to 40 A (8.3 ms half-sine), allowing use in DC power rail protection where reverse blocking is required. |
| Sub-100 ps response time | Clamps ESD events before propagation into CMOS or BiCMOS IC inputs, meeting IEC61000-4-2 ±8 kV contact discharge immunity. |
| Class 2 secondary lightning rating | Validated per IEC61000-4-5 with 12 Ω source impedance up to 1 kV test level-covers industrial control and telecom interface applications. |
Applications
| Industrial Power Input Protection | Ethernet PHY Interface Protection |
|---|---|
Use Scenario: 12 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive-going surges before they reach upstream DC-DC converter ICs. Use Value: Limits clamped voltage to 28.8 V, staying within 30 V absolute maximum rating of common buck controllers (e.g., LM5017), preventing latch-up or gate oxide damage. |
Use Scenario: RJ45 connector side of 10/100BASE-TX Ethernet PHY on industrial gateway board subjected to ESD and cable-induced surges. IC Role / Device Role / Timing Role: TVS connected across differential pair (TD+–TD−) and common-mode (TD+–GND, TD−–GND) to suppress common- and differential-mode transients. Use Value: Sub-100 ps response ensures clamping occurs before PHY receiver input stages (e.g., DP83848) experience overstress, preserving signal integrity and link reliability. |
| Automotive Body Control Module (BCM) | RS-485 Transceiver Protection |
Use Scenario: 12 V battery-supplied microcontroller power rail in BCM exposed to ISO 7637-2 pulse 1 (inductive load dump) and pulse 2a (alternator load dump). IC Role / Device Role / Timing Role: Primary TVS on main VCC rail, positioned upstream of LDO regulators feeding MCU core and peripherals. Use Value: 500 W rating sustains 17.6 A surge current without failure, enabling compliance with automotive transient immunity requirements without additional series impedance. |
Use Scenario: Half-duplex RS-485 bus node (e.g., MAX1487) in factory automation system subject to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS (e.g., SMAJ16CA) not applicable here; SMAJ16E3/TR13 used on VCC supply line to protect transceiver power pins from coupled surges. Use Value: Low 1 µA leakage avoids loading 3.3 V or 5 V bias networks; clamping at 28.8 V prevents overvoltage shutdown of transceiver internal regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A | Same VWM, VBR, VC, and PPP; non-RoHS tin-lead plating; no "e3" suffix. | Lacks RoHS compliance; unsuitable for lead-free manufacturing or EU market deployment. | Select SMAJ16A only for legacy through-hole or mixed-technology assemblies where RoHS exemption applies. |
| SMBJ16A | Same electrical specs but SMB (DO-214AA) package; 30% smaller footprint; 600 W PPP rating. | Higher power density but reduced thermal mass; requires tighter layout control for heat dissipation. | Choose SMBJ16A when board space is constrained and thermal management via copper pour is feasible. |
Compared with SMAJ16A and SMBJ16A, SMAJ16E3/TR13 uniquely combines RoHS compliance, DO-214AC thermal robustness, and tape-and-reel packaging (TR13 = 13-inch reel, 2500 units), making it optimal for high-volume automated SMT production targeting industrial and automotive markets.
Availability
SMAJ16E3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, Ethernet PHY interface protection, and RS-485 transceiver supply line protection requiring stable component supply and full RoHS compliance.
Supply support for SMAJ16E3/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 applications.
The SMAJ series was engineered for ruggedized surface-mount transient suppression in harsh environments-emphasizing fast response, repeatable clamping, and thermal resilience in compact DO-214AC packages.
FAQ
What is the clamping voltage of SMAJ16E3/TR13 under a 10/1000 µs surge?
The SMAJ16E3/TR13 has a maximum clamping voltage (VC) of 28.8 V at 17.6 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 2 in the Microsemi datasheet MSC0270A and defines the upper voltage limit imposed on protected circuitry during surge events-critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMAJ16E3/TR13 RoHS compliant and what does the "e3" suffix indicate?
Yes, SMAJ16E3/TR13 is RoHS compliant. The "e3" suffix denotes annealed matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating the need for dry packing and supporting lead-free reflow soldering at 260°C for 10 seconds. This makes SMAJ16E3/TR13 suitable for environmentally regulated markets and modern SMT assembly lines.
What is the standoff voltage and how does it relate to system design for SMAJ16E3/TR13?
The SMAJ16E3/TR13 has a reverse standoff voltage (VWM) of 16 V, meaning it remains non-conductive up to this DC or peak AC voltage. In practice, this allows use on nominal 12 V or 15 V rails where transient margins must exceed steady-state operation-ensuring no leakage or false triggering during normal operation while still responding promptly to overvoltage events exceeding 17.8 V (VBR min).
Can SMAJ16E3/TR13 be used for bidirectional protection?
No, SMAJ16E3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number. It conducts only in reverse (cathode-to-anode) during overvoltage events and blocks forward current up to 3.5 V. For bidirectional protection-such as across AC signal lines or differential buses-SMAJ16CA or SMAJ16CE3/TR13 would be required instead.
What standards does SMAJ16E3/TR13 meet for surge immunity testing?
SMAJ16E3/TR13 is validated for IEC61000-4-2 (ESD ±8 kV contact), IEC61000-4-4 (EFT ±2 kV), and IEC61000-4-5 secondary lightning protection with 12 Ω source impedance (Class 2). These certifications are explicitly stated in the Microsemi datasheet MSC0270A and confirm suitability for industrial, telecom, and automotive interface protection where standardized surge immunity is mandated.
SMAJ16E3/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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 17.6A
- 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)
SMAJ16E3/TR13 FAQ
1.How can I place an order for SMAJ16E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16E3/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 SMAJ16E3/TR13 reliable?
The price and inventory of SMAJ16E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ16E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16E3/TR13?
SMAJ16E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16E3/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 SMAJ16E3/TR13?
For technical support, including SMAJ16E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16E3/TR13 requirements.
6.How does Aetrix verify that SMAJ16E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ16E3/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 SMAJ16E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ16E3/TR13?
All SMAJ16E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16E3/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 SMAJ16E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ16E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ16E3/TR13 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
