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

Vishay General Semiconductor - Diodes Division SMAJ48C-E3/61

Name: SMAJ48C-E3/61
Brand: Vishay General Semiconductor - Diodes Division
SKU: SMAJ48C-E3/61
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMAJ48C-E3/61

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-214AC, SMA

Datasheet:: SMAJ48C-E3/61.pdf

Description:: TVS DIODE 48VWM 85.5VC DO214AC

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Product details

Overview

SMAJ48C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 48 V stand-off voltage (V_WM), 53.3–65.1 V breakdown range (V_BR at 1 mA), 85.5 V maximum clamping voltage (V_C) at 4.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.

For engineers reviewing the SMAJ48C-E3/61 datasheet, SMAJ48C-E3/61 pinout, SMAJ48C-E3/61 application, or SMAJ48C-E3/61 equivalent, key selection criteria include bi-directional clamping capability, low leakage (<1 µA at V_WM), RoHS-compliant matte tin terminations, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 × 5.0 mm copper pads.

Technical Context

This bi-directional TVS diode operates symmetrically in both polarities, with identical electrical characteristics forward and reverse. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle.

The device is rated for -55 °C to +150 °C operating junction temperature, exhibits 120 °C/W typical junction-to-ambient thermal resistance, and meets J-STD-020 MSL Level 1 with peak reflow of 260 °C - confirming suitability for high-reliability industrial and automotive PCB assembly without derating concerns.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	48 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for protected line.
V_BR (min/max)	53.3 V / 65.1 V at 1 mA - Breakdown voltage range ensures reliable turn-on across process variation and temperature.
V_C @ I_PPM	85.5 V at 4.7 A - Clamping voltage limits downstream component stress during 10/1000 µs surge events.
P_PPM	400 W - Peak pulse power handling capacity with standard 10/1000 µs waveform; derates above 78 V to 300 W.
I_PPM	4.7 A - Peak pulse current corresponding to V_C; determines minimum trace width and PCB copper area needed.
I_D @ V_WM	<1 µA - Reverse leakage current at stand-off voltage; critical for low-power sensor and battery-backed circuits.
T_J max.	+150 °C - Maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling.

Pinout & Package

Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking - symmetrical terminal design allows orientation-agnostic placement.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (symmetrical)	Bi-directional transient conduction path	Both terminals function identically; no cathode band - eliminates orientation errors during automated placement.
Case (body)	Non-electrical mechanical interface	DO-214AC molded body provides UL 94 V-0 flammability rating and mechanical robustness for board-level shock/vibration.

Key Features

Feature	Design Value
Bi-directional clamping	Enables single-device protection of AC-coupled or floating signal lines without polarity constraints.
Glass-passivated junction	Ensures long-term stability of V_BR and low leakage under thermal cycling and humidity exposure.
MSL Level 1 rating	Permits unlimited floor life and standard reflow profile (260 °C peak) without baking preconditioning.
RoHS-compliant matte tin leads	Guarantees solderability per J-STD-002 and whisker resistance per JESD201 Class 1A (E3 suffix).
400 W 10/1000 µs pulse rating	Provides proven surge immunity for IEC 61000-4-5 Level 3 (1 kV/2 kV) and ISO 7637-2 Pulse 1/2a/3a compliance.

Applications

Industrial Sensor Interface	Automotive Body Control Module
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from inductive kickback in factory automation PLCs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to limit transients before signal conditioning circuitry. Use Value: Prevents damage to precision op-amps and ADC inputs by limiting excursion to ≤85.5 V during 400 W surges.	Use Scenario: Safeguarding LIN bus transceiver I/O pins against load dump and alternator ripple in door module ECUs. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on bidirectional data line, co-located with connector. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 2a (−100 V/50 ms) while adding <0.5 pF parasitic capacitance.
Telecom Power Input Stage	Consumer USB-C Port Protection
Use Scenario: Shielding 48 V DC input rails in PoE-powered network switches from lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converter, sized for 400 W peak dissipation. Use Value: Absorbs energy without latch-up, enabling system-level compliance with IEC 61000-4-5 (2 Ω/12 Ω coupling).	Use Scenario: Guarding USB-C CC and V_CONN pins against ESD and hot-plug transients in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed adjacent to connector to minimize stub length. Use Value: Limits ESD strikes (IEC 61000-4-2 ±15 kV contact) to <85.5 V within <1 ns, preserving USB 3.2 Gen 2 signal integrity.

Industrial Sensor Interface

Automotive Body Control Module

Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from inductive kickback in factory automation PLCs.

IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed directly at connector entry point to limit transients before signal conditioning circuitry.

Use Value: Prevents damage to precision op-amps and ADC inputs by limiting excursion to ≤85.5 V during 400 W surges.

Use Scenario: Safeguarding LIN bus transceiver I/O pins against load dump and alternator ripple in door module ECUs.

IC Role / Device Role / Timing Role: Primary overvoltage suppression element on bidirectional data line, co-located with connector.

Use Value: Maintains signal integrity under ISO 7637-2 Pulse 2a (−100 V/50 ms) while adding <0.5 pF parasitic capacitance.

Telecom Power Input Stage

Consumer USB-C Port Protection

Use Scenario: Shielding 48 V DC input rails in PoE-powered network switches from lightning-induced surges.

IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converter, sized for 400 W peak dissipation.

Use Value: Absorbs energy without latch-up, enabling system-level compliance with IEC 61000-4-5 (2 Ω/12 Ω coupling).

Use Scenario: Guarding USB-C CC and V_CONN pins against ESD and hot-plug transients in portable docking stations.

IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed adjacent to connector to minimize stub length.

Use Value: Limits ESD strikes (IEC 61000-4-2 ±15 kV contact) to <85.5 V within <1 ns, preserving USB 3.2 Gen 2 signal integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ48CA-E3/61	Same electrical specs and DO-214AC package; CA suffix denotes same bi-directional construction as C suffix per Vishay documentation.	No functional difference - CA and C are interchangeable per Vishay's ordering note and device marking table.	Select SMAJ48CA-E3/61 only if legacy BOM references CA; SMAJ48C-E3/61 is functionally identical and currently stocked.
SMBJ48C-E3/52	Higher 600 W P_PPM, larger DO-214AA (SMB) package (4.6 × 3.6 mm vs. 4.5 × 2.7 mm), 87.1 V V_C at 5.8 A.	Better suited for higher-energy threats (e.g., IEC 61000-4-5 Level 4); requires PCB layout change due to larger footprint and different pad geometry.	Choose SMBJ48C-E3/52 when surge energy exceeds 400 W margin; otherwise SMAJ48C-E3/61 offers optimal size/power balance.

Compared with SMAJ48CA-E3/61, the SMAJ48C-E3/61 offers identical protection performance in the same package with no layout or qualification impact; versus SMBJ48C-E3/52, it trades 200 W pulse power headroom for 30% smaller board area and lower thermal mass - ideal for space-constrained industrial sensors and USB peripherals.

Availability

SMAJ48C-E3/61 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power input stages requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for SMAJ48C-E3/61 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in rectifiers, diodes, MOSFETs, and protection devices with emphasis on reliability, efficiency, and AEC-Q qualified solutions.

The SMAJ series is engineered specifically for surface-mount transient suppression in harsh environments - balancing high pulse power, low clamping, and robust packaging for industrial, automotive, and telecom infrastructure.

FAQ

What is the polarity configuration of SMAJ48C-E3/61?

The SMAJ48C-E3/61 is a bi-directional TVS diode with symmetrical terminals and no cathode marking - both ends function identically under positive or negative transients. This eliminates orientation dependency during pick-and-place, simplifying manufacturing and reducing assembly errors compared to uni-directional variants like SMAJ48A-E3/61.

Does SMAJ48C-E3/61 meet automotive qualification standards?

The SMAJ48C-E3/61 carries the E3 suffix indicating RoHS compliance and JESD201 Class 1A whisker resistance, but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101, specify the HE3-suffixed variant (e.g., SMAJ48CHE3/61), which undergoes extended reliability testing including temperature cycling and HTRB per AEC Q101-004.

What is the recommended PCB pad layout for SMAJ48C-E3/61?

Vishay specifies a 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pad area per terminal for SMAJ48C-E3/61 to achieve rated 400 W pulse power. Smaller pads reduce thermal dissipation and cause premature failure under repeated surges; use thermal reliefs only on non-current-carrying traces, and avoid solder mask defined pads to ensure full copper contact.

How does SMAJ48C-E3/61 compare to SMAJ48A-E3/61?

SMAJ48C-E3/61 is bi-directional with symmetrical clamping in both polarities, while SMAJ48A-E3/61 is uni-directional and requires correct cathode orientation. The "A" suffix indicates tighter V_BR tolerance (53.3–58.9 V vs. 53.3–65.1 V), but SMAJ48C-E3/61 is mandatory for AC or floating-line protection where polarity is undefined.

Is SMAJ48C-E3/61 compatible with lead-free reflow processes?

Yes - SMAJ48C-E3/61 is rated for lead-free reflow with a maximum peak temperature of 260 °C (per J-STD-020 MSL Level 1), and its matte tin-plated leads comply with J-STD-002 solderability requirements. No pre-baking is required, and the device withstands standard 250–260 °C profiles with 60–90 s above 220 °C without degradation.

SMAJ48C-E3/61 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-214AC, SMA

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 48V

Voltage - Breakdown (Min):: 53.3V

Voltage - Clamping (Max) @ Ipp:: 85.5V

Current - Peak Pulse (10/1000µs):: 4.7A

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)

SMAJ48C-E3/61 FAQ

1.How can I place an order for SMAJ48C-E3/61 through Aetrix?

Please submit a Request for Quotation (RFQ) for SMAJ48C-E3/61 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 SMAJ48C-E3/61 reliable?

The price and inventory of SMAJ48C-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48C-E3/61 is usually 5 days.

3.What payment methods are accepted for SMAJ48C-E3/61?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48C-E3/61 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMAJ48C-E3/61?

SMAJ48C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMAJ48C-E3/61 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 SMAJ48C-E3/61?

For technical support, including SMAJ48C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48C-E3/61 requirements.

6.How does Aetrix verify that SMAJ48C-E3/61 is sourced from the original manufacturer or authorized distributors?

All SMAJ48C-E3/61 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 SMAJ48C-E3/61 meets industry standards.

7.What is the process for return or replacement of SMAJ48C-E3/61?

All SMAJ48C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48C-E3/61, 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 SMAJ48C-E3/61 part is unused and in its original packaging.

Return procedure for SMAJ48C-E3/61:

1.Submit a request within 90 days.

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

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