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

Taiwan Semiconductor Corporation SMAJ60A

Name: SMAJ60A
Brand: Taiwan Semiconductor Corporation
SKU: SMAJ60A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ60A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ60A.pdf

Description:: TVS DIODE 60VWM 96.8VC DO214AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SMAJ60A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection in DC power rails. It features a 60 V working stand-off voltage (V_WM), 66.7–73.7 V breakdown voltage (V_BR), 96.8 V maximum clamping voltage (V_C) at 4.1 A peak impulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - ideal for protecting SMPS inputs and DC/DC converter outputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.

For engineers reviewing the SMAJ60A datasheet, SMAJ60A pinout, SMAJ60A application, or SMAJ60A equivalent, key selection criteria include its unidirectional polarity, low leakage (<1 µA @ 60 V), fast sub-1 ps response time, RoHS- and halogen-free compliance, and suitability for automated SMT placement in automotive-grade and industrial power systems.

Technical Context

The SMAJ60A operates as a unidirectional avalanche diode with glass-passivated junction, enabling precise voltage clamping during transient events. Its electrical behavior is defined by a tightly controlled V_BR range (66.7–73.7 V @ 1 mA), low dynamic impedance, and guaranteed clamping performance up to 96.8 V at 4.1 A IPPM under standardized 10/1000 µs surge conditions.

It supports operation across -55°C to +150°C junction temperature range, meets JESD201 Class 2 whisker resistance, and is rated for 40 A non-repetitive forward surge (IFSM). The device is not bidirectional - polarity is marked on the cathode band, and reverse leakage remains <1 µA at V_WM = 60 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	60 V - Maximum continuous DC or RMS voltage the device blocks without conduction
V_BR min/max	66.7 V / 73.7 V @ 1 mA - Ensures reliable triggering above normal operating rail while avoiding false trips
V_C @ I_PPM	96.8 V @ 4.1 A - Clamping voltage limits downstream IC stress during 10/1000 µs surges
P_PPM	400 W - Peak pulse power handling capability per standard 10/1000 µs waveform
I_R @ V_WM	<1 µA - Negligible leakage ensures minimal standby power loss in high-impedance circuits
T_J max	+150 °C - Enables use in thermally demanding environments such as under-hood automotive modules
Package	DO-214AC (SMA) - Industry-standard SMT footprint compatible with JEDEC MS-013, 0.060 g weight

Pinout & Package

DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode indicated by a band on the body. Polarity-sensitive; anode and cathode terminals are non-interchangeable in circuit design.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Current entry point in forward bias; connected to protected line's lower-potential side	When used for positive-rail protection, anode ties to ground or return path
Cathode (banded end)	Current exit point in forward bias; connects to protected line's higher-potential side	For 60 V rail protection, cathode connects to +60 V input; clamps transients toward ground

Key Features

Feature	Design Value
Glass-passivated junction	Ensures stable V_BR tolerance and long-term reliability under thermal cycling and humidity
Sub-1 ps response time	Activates before most ICs experience latch-up or gate oxide damage during ESD/EFT events
ISO 7637-2 compliance	Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b)
Moisture sensitivity level 1	Zero bake requirement prior to reflow; compatible with standard J-STD-020 assembly processes
Halogen-free & RoHS	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green electronics manufacturing

Applications

Switching Mode Power Supply (SMPS) Input Protection	On-Board DC/DC Converter Rail Protection
Use Scenario: Protects primary-side rectified input of 48–60 V telecom or industrial SMPS against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping transients within 96.8 V to safeguard bridge rectifier and controller ICs. Use Value: Prevents catastrophic failure of UCC28070 or LM5023 controllers by limiting voltage overshoot below their absolute maximum ratings.	Use Scenario: Shields 5 V or 3.3 V output rails of isolated DC/DC modules in motor drives or PLCs from back-EMF coupling and bus transients. IC Role / Device Role / Timing Role: Mounted at secondary-side output capacitor, absorbing coupled energy from primary-side switching noise and external surges. Use Value: Maintains regulated output stability during 10/1000 µs pulses up to 400 W without derating or thermal shutdown.
Automotive Body Control Module (BCM) Power Input	LED Driver Power Stage Protection
Use Scenario: Secures 12 V or 24 V supply input of BCMs against battery disconnect/load dump per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: First-line defense on main power entry, placed upstream of LDOs and CAN transceivers to limit rail excursion. Use Value: Enables compliance with OEM requirements for >100,000-cycle surge endurance without parameter drift.	Use Scenario: Safeguards constant-current LED driver ICs (e.g., AL8863) from inductive kickback when driving high-power LED strings. IC Role / Device Role / Timing Role: Connected across driver output and return, clamping flyback voltage spikes generated by MOSFET turn-off. Use Value: Eliminates need for snubber networks, reducing BOM count and PCB area while maintaining 96.8 V clamp ceiling.

Switching Mode Power Supply (SMPS) Input Protection

On-Board DC/DC Converter Rail Protection

Use Scenario: Protects primary-side rectified input of 48–60 V telecom or industrial SMPS against load dump and inductive switching spikes.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping transients within 96.8 V to safeguard bridge rectifier and controller ICs.

Use Value: Prevents catastrophic failure of UCC28070 or LM5023 controllers by limiting voltage overshoot below their absolute maximum ratings.

Use Scenario: Shields 5 V or 3.3 V output rails of isolated DC/DC modules in motor drives or PLCs from back-EMF coupling and bus transients.

IC Role / Device Role / Timing Role: Mounted at secondary-side output capacitor, absorbing coupled energy from primary-side switching noise and external surges.

Use Value: Maintains regulated output stability during 10/1000 µs pulses up to 400 W without derating or thermal shutdown.

Automotive Body Control Module (BCM) Power Input

LED Driver Power Stage Protection

Use Scenario: Secures 12 V or 24 V supply input of BCMs against battery disconnect/load dump per ISO 7637-2 Pulse 5a.

IC Role / Device Role / Timing Role: First-line defense on main power entry, placed upstream of LDOs and CAN transceivers to limit rail excursion.

Use Value: Enables compliance with OEM requirements for >100,000-cycle surge endurance without parameter drift.

Use Scenario: Safeguards constant-current LED driver ICs (e.g., AL8863) from inductive kickback when driving high-power LED strings.

IC Role / Device Role / Timing Role: Connected across driver output and return, clamping flyback voltage spikes generated by MOSFET turn-off.

Use Value: Eliminates need for snubber networks, reducing BOM count and PCB area while maintaining 96.8 V clamp ceiling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ60	Higher V_C = 107 V @ 3.7 A; wider V_BR range (66.7–81.5 V); slightly lower IPPM	Less stringent clamping - suitable where downstream ICs tolerate >100 V transient excursions	Select SMAJ60 only if system-level testing confirms 107 V clamping does not exceed downstream component V_DS(max) or V_IN(max)
SMBJ60A	Same V_WM/V_BR/V_C specs but in larger DO-214AA (SMB) package; 600 W P_PPM	Higher power handling and thermal mass - preferred for repeated surge exposure or elevated ambient temperatures	Choose SMBJ60A when layout allows larger footprint and system requires >400 W single-pulse margin or extended surge duty cycle

Compared with SMAJ60 and SMBJ60A, the SMAJ60A delivers tighter V_BR tolerance and lower clamping voltage in the smallest DO-214AC footprint - optimizing board space and protection precision for cost-sensitive, high-volume automotive and industrial power designs.

Availability

SMAJ60A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, automotive body control modules, and LED driver power stages requiring stable component supply, full traceability, and consistent parametric performance across production lots.

Supply support for SMAJ60A 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

Taiwan Semiconductor Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.

The SMAJ series is part of TSC's high-reliability transient suppression portfolio, engineered specifically for automotive, industrial, and telecom power systems requiring ISO 7637-2 compliance, AEC-Q200 readiness, and robust SMT manufacturability.

FAQ

What is the polarity configuration of the SMAJ60A?

The SMAJ60A is a unidirectional TVS diode with clearly marked cathode band. In circuit operation, the cathode connects to the protected voltage rail (e.g., +60 V), and the anode connects to ground or return path. This configuration enables clamping only during positive transients - reverse voltage beyond V_WM triggers avalanche conduction. Bidirectional protection requires SMAJ60CA or equivalent.

Does the SMAJ60A meet automotive transient immunity standards?

Yes, the SMAJ60A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for 12 V and 24 V vehicle electrical systems. Its 400 W peak pulse power rating, sub-1 ps response, and verified clamping performance at 96.8 V make it suitable for front-end protection in ECUs, BCMs, and ADAS power modules - provided layout follows recommended trace width and grounding practices per TSC Application Note AN-107.

What is the maximum clamping voltage of the SMAJ60A under surge conditions?

The SMAJ60A has a maximum clamping voltage (V_C) of 96.8 V at 4.1 A peak impulse current (I_PPM) under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across all units and represents the upper limit of voltage seen by downstream components during worst-case transient events - critical for ensuring compatibility with 100 V-rated MOSFETs or 80 V-input PMICs.

Can the SMAJ60A be used in bidirectional signal line protection?

No, the SMAJ60A is strictly unidirectional and unsuitable for AC or bidirectional signal lines. Its electrical characteristics apply only in one direction - reverse conduction occurs above V_BR, but forward conduction is not symmetrical. For bidirectional data line protection (e.g., CAN, RS-485), use SMAJ60CA or SMAJ60A's bidirectional counterpart, which exhibits matched clamping in both polarities and carries 'CA' suffix per TSC ordering nomenclature.

What is the moisture sensitivity level (MSL) and reflow profile for the SMAJ60A?

The SMAJ60A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. It supports standard lead-free reflow profiles with peak temperature ≤260°C, ramp rates per JEDEC J-STD-020, and is qualified for wave and selective soldering. Matte tin plating ensures solderability per J-STD-002, and the DO-214AC package withstands multiple reflow cycles without delamination.

SMAJ60A Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Package/Case:: DO-214AC, SMA

Series:: SMAJ

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 60V

Voltage - Breakdown (Min):: 66.7V

Voltage - Clamping (Max) @ Ipp:: 96.8V

Current - Peak Pulse (10/1000µs):: 4.1A

Power - Peak Pulse:: 400W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

SMAJ60A FAQ

1.How can I place an order for SMAJ60A through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ60A 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 SMAJ60A reliable?

The price and inventory of SMAJ60A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60A is usually 5 days.

3.What payment methods are accepted for SMAJ60A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ60A?

SMAJ60A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ60A 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 SMAJ60A?

For technical support, including SMAJ60A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60A requirements.

6.How does Aetrix verify that SMAJ60A is sourced from the original manufacturer or authorized distributors?

All SMAJ60A 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 SMAJ60A meets industry standards.

7.What is the process for return or replacement of SMAJ60A?

All SMAJ60A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60A, 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 SMAJ60A part is unused and in its original packaging.

Return procedure for SMAJ60A:

1.Submit a request within 90 days.

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

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