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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Microchip Technology SMAJ9.0CE3/TR13

Name: SMAJ9.0CE3/TR13
Brand: Microchip Technology
SKU: SMAJ9.0CE3/TR13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ9.0CE3/TR13

Manufacturer:: Microchip Technology

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ9.0CE3/TR13.pdf

Description:: TVS DIODE 9VWM 16.9VC DO214AC

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Product details

Overview

SMAJ9.0CE3/TR13 from Microsemi is a surface-mount bidirectional transient voltage suppressor (TVS) designed for ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 9.0 V reverse standoff voltage (V_WM), 10.0 V minimum breakdown voltage (V_BR), 16.9 V maximum clamping voltage (V_C) at 29.5 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform.

For engineers reviewing the SMAJ9.0CE3/TR13 datasheet, SMAJ9.0CE3/TR13 pinout, SMAJ9.0CE3/TR13 application, or SMAJ9.0CE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin plating for lead-free assembly.

Technical Context

This bidirectional TVS operates symmetrically across both polarities, with clamping action triggered when either terminal exceeds ±16.9 V relative to the other under 10/1000 µs surge conditions. Its <100 ps theoretical response time enables effective suppression of fast ESD events per IEC61000-4-2 Level 4 (±15 kV contact).

Designed for mounting on FR4 PCBs with recommended footprint, it delivers 15 °C/W junction-to-lead thermal resistance and supports steady-state dissipation of 1.56 W at 25 °C ambient. The device meets MIL-PRF-19500 screening options (with MX prefix) and avionics-grade temperature cycling (with MA prefix) when specified.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	9.0 V - Maximum continuous reverse working voltage before clamping initiates; sets operating margin for 9 V nominal DC rails.
V_BR min @ I_BR	10.0 V @ 1 mA - Minimum voltage at which avalanche conduction begins; ensures reliable turn-on above system operating voltage.
V_C @ I_PP	16.9 V @ 29.5 A - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream ICs.
P_PP	500 W - Peak pulse power handling capability; sustains transient energy without failure under standardized surge waveforms.
I_PP	29.5 A - Peak surge current supported at V_C; determines survivability against IEC61000-4-5 Class 4 (42 Ω source) surges.
I_D @ V_WM	5 µA - Maximum leakage at 9.0 V; ensures negligible standby power loss and no interference with high-impedance sensing circuits.
Operating Temp	−65 °C to +150 °C - Full industrial and extended automotive temperature range support without derating.

Pinout & Package

Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy body meeting UL94V-0; C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating; cathode band omitted for bidirectional configuration.

Pin/Terminal	Circuit Role	Design Meaning
Anode / Cathode (symmetrical)	Bidirectional surge path	No polarity marking; terminals interchangeable; clamps equally for positive or negative transients relative to common reference.
Case / Body	Thermal conduction path	Directly transfers heat to PCB copper; requires recommended pad layout (min 1.70 × 4.93 mm) for rated 15 °C/W junction-to-lead R_θ.

Key Features

Feature	Design Value
Bidirectional clamping	Enables single-device protection of AC-coupled or floating signal lines without polarity constraints.
IEC61000-4-5 Class 4 compliance	Withstands 42 Ω source impedance surges up to 1 kV (open-circuit) or 30 A (short-circuit) without degradation.
RoHS-compliant "e3" finish	Matte-tin plating qualified per JEDEC J-STD-020B Level 1 moisture sensitivity; no dry pack required.
Fast response time	<5 ns clamping onset for bidirectional mode; limits voltage overshoot during sub-microsecond ESD events.
500 W peak pulse rating	Supports robust protection in 12 V/24 V industrial control, telecom power interfaces, and automotive body electronics.

Applications

Industrial PLC I/O Protection	Automotive Body Control Module
Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers from induced switching transients and load dump coupling. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±1 kV surges within 5 ns. Use Value: Prevents latch-up or gate oxide damage in optocoupler input stages while maintaining ≤5 µA leakage at 24 V nominal.	Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs in door module ECUs exposed to battery line transients. IC Role / Device Role / Timing Role: Standoff-rated clamping device absorbing ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V) without forward conduction. Use Value: Enables direct placement at connector entry point with DO-214AC footprint compatibility and −65 °C to +150 °C operation.
Telecom Power Interface	Medical Sensor Signal Line
Use Scenario: Secondary surge protection on −48 V DC telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Bidirectional shunt element limiting voltage excursions to ≤16.9 V during IEC61000-4-5 combination wave surges. Use Value: Coordinates with upstream GDT or MOV to achieve staged clamping, reducing stress on downstream DC/DC converters.	Use Scenario: ESD hardening of analog front-end inputs (e.g., ECG electrode amplifiers) where low capacitance and minimal leakage are critical. IC Role / Device Role / Timing Role: Low-leakage (5 µA) bidirectional clamp placed before instrumentation amplifier inputs to prevent CMOS gate damage. Use Value: Delivers <5 ns response without adding signal-path capacitance that would degrade bandwidth or noise performance.

Industrial PLC I/O Protection

Automotive Body Control Module

Use Scenario: Protecting 24 V DC digital input channels in programmable logic controllers from induced switching transients and load dump coupling.

IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±1 kV surges within 5 ns.

Use Value: Prevents latch-up or gate oxide damage in optocoupler input stages while maintaining ≤5 µA leakage at 24 V nominal.

Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs in door module ECUs exposed to battery line transients.

IC Role / Device Role / Timing Role: Standoff-rated clamping device absorbing ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V) without forward conduction.

Use Value: Enables direct placement at connector entry point with DO-214AC footprint compatibility and −65 °C to +150 °C operation.

Telecom Power Interface

Medical Sensor Signal Line

Use Scenario: Secondary surge protection on −48 V DC telecom power feeds entering base station equipment cabinets.

IC Role / Device Role / Timing Role: Bidirectional shunt element limiting voltage excursions to ≤16.9 V during IEC61000-4-5 combination wave surges.

Use Value: Coordinates with upstream GDT or MOV to achieve staged clamping, reducing stress on downstream DC/DC converters.

Use Scenario: ESD hardening of analog front-end inputs (e.g., ECG electrode amplifiers) where low capacitance and minimal leakage are critical.

IC Role / Device Role / Timing Role: Low-leakage (5 µA) bidirectional clamp placed before instrumentation amplifier inputs to prevent CMOS gate damage.

Use Value: Delivers <5 ns response without adding signal-path capacitance that would degrade bandwidth or noise performance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Littelfuse SMAJ9.0CA	Identical V_WM, V_BR, V_C, and P_PP; same DO-214AC package; matte-tin plating per J-STD-020B Level 1.	No avionics-grade screening option (MA/MX prefixes unavailable); limited legacy MIL-PRF-19500 traceability.	Select when standard commercial reliability suffices and Microsemi's extended screening options are not required.
Vishay SMAJ9.0A-E3/5A	Unidirectional variant; 9.0 V V_WM, 10.0 V V_BR, 15.4 V V_C @ 32.6 A; same RoHS-compliant finish and thermal specs.	Requires explicit polarity assignment; unsuitable for AC or floating nodes; lower clamping voltage benefits unidirectional DC rails.	Choose only for fixed-polarity 9 V supply lines where tighter clamping margin justifies added layout constraint.

Compared with SMAJ9.0CE3/TR13, Littelfuse SMAJ9.0CA offers identical electrical and mechanical specs but lacks Microsemi's avionics screening path, while Vishay SMAJ9.0A-E3/5A trades bidirectionality for 1.5 V lower clamping-making it viable only where polarity is strictly controlled and lower V_C is prioritized over design flexibility.

Availability

SMAJ9.0CE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power interface designs requiring stable component supply, RoHS compliance, and IEC61000-4-5 Class 4 surge immunity.

Supply support for SMAJ9.0CE3/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The SMAJ series was developed specifically for surface-mount transient suppression in harsh environments, emphasizing robust surge handling, wide temperature operation, and qualification-ready packaging for mission-critical systems.

FAQ

What does the "CE3/TR13" suffix indicate in SMAJ9.0CE3/TR13?

The "C" denotes bidirectional configuration, "E3" specifies RoHS-compliant matte-tin plating per J-STD-020B Level 1, and "TR13" indicates tape-and-reel packaging on a 13-inch reel (2500 units). This full suffix confirms the device is a bidirectional, lead-free, production-ready variant of the SMAJ9.0 platform, and SMAJ9.0CE3/TR13 meets all stated electrical and thermal specifications in the Microsemi MSC0270A datasheet.

Is SMAJ9.0CE3/TR13 suitable for protecting RS-485 communication lines?

Yes-SMAJ9.0CE3/TR13 is appropriate for RS-485 differential pair protection due to its bidirectional symmetry, 16.9 V clamping voltage, and low 5 µA leakage at 9 V. When placed line-to-ground on both A and B lines, it suppresses common-mode surges per IEC61000-4-5 without distorting signal integrity; SMAJ9.0CE3/TR13's DO-214AC footprint allows compact placement near connectors.

How does SMAJ9.0CE3/TR13 perform under repeated surge stress?

SMAJ9.0CE3/TR13 supports an impulse repetition rate of 0.01% duty factor and maintains specification compliance after multiple 10/1000 µs surges at rated IPP. For avionics use, the MA-prefix variant undergoes 10× temperature cycling (−55 °C to +125 °C), 3× surge testing, and 24-hour HTRB validation-SMAJ9.0CE3/TR13 itself is qualified for industrial endurance per the base datasheet.

Can SMAJ9.0CE3/TR13 replace SMAJ9.0A in a design?

No-SMAJ9.0CE3/TR13 is bidirectional while SMAJ9.0A is unidirectional; substituting them without circuit review risks improper clamping on reverse-polarity transients. SMAJ9.0CE3/TR13 clamps at ±16.9 V, whereas SMAJ9.0A clamps only at +15.4 V (forward) and conducts freely in reverse. Layout and system-level polarity assumptions must be verified before interchange.

What PCB layout practices maximize thermal performance for SMAJ9.0CE3/TR13?

Use the recommended DO-214AC pad layout (min 1.70 × 4.93 mm per pad) on 1 oz Cu FR4, connect both pads to internal ground planes via ≥4 thermal vias each, and avoid solder mask over thermal pads. This achieves the rated 15 °C/W junction-to-lead thermal resistance; SMAJ9.0CE3/TR13's 1.56 W steady-state dissipation at 25 °C ambient depends directly on this implementation.

SMAJ9.0CE3/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:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 9V

Voltage - Breakdown (Min):: 10V

Voltage - Clamping (Max) @ Ipp:: 16.9V

Current - Peak Pulse (10/1000µs):: 29.5A

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)

SMAJ9.0CE3/TR13 FAQ

1.How can I place an order for SMAJ9.0CE3/TR13 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ9.0CE3/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 SMAJ9.0CE3/TR13 reliable?

The price and inventory of SMAJ9.0CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0CE3/TR13 is usually 5 days.

3.What payment methods are accepted for SMAJ9.0CE3/TR13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CE3/TR13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ9.0CE3/TR13?

SMAJ9.0CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ9.0CE3/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 SMAJ9.0CE3/TR13?

For technical support, including SMAJ9.0CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CE3/TR13 requirements.

6.How does Aetrix verify that SMAJ9.0CE3/TR13 is sourced from the original manufacturer or authorized distributors?

All SMAJ9.0CE3/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 SMAJ9.0CE3/TR13 meets industry standards.

7.What is the process for return or replacement of SMAJ9.0CE3/TR13?

All SMAJ9.0CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CE3/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 SMAJ9.0CE3/TR13 part is unused and in its original packaging.

Return procedure for SMAJ9.0CE3/TR13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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