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

Vishay General Semiconductor - Diodes Division SAC15-E3/54

Name: SAC15-E3/54
Brand: Vishay General Semiconductor - Diodes Division
SKU: SAC15-E3/54
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SAC15-E3/54

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SAC15-E3/54.pdf

Description:: TVS DIODE 15VWM 23.6VC DO204AC

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Inventory:4,000

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Product details

Overview

SAC15-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode in DO-15 package, rated for 500 W peak pulse power (10/1000 µs), 15 V standoff voltage (V_WM), and 23.6 V maximum clamping voltage at 5.0 A. It protects sensitive signal lines in industrial sensor interfaces and power supply inputs against ESD and inductive switching transients.

For engineers reviewing the SAC15-E3/54 datasheet, SAC15-E3/54 pinout, SAC15-E3/54 application, or SAC15-E3/54 equivalent, key selection criteria include clamping voltage margin, junction capacitance (50 pF), unidirectional polarity, thermal derating above 25 °C, and DO-15 lead-form compatibility with through-hole PCB layouts.

Technical Context

The SAC15-E3/54 operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its 175 °C maximum junction temperature and 3.0 W steady-state power dissipation support operation in high-ambient industrial environments without forced cooling.

Designed for unidirectional protection only, it exhibits 5.0 µA max reverse leakage at V_WM = 15 V and 20 A peak pulse current (I_PPM) under standardized 10/1000 µs waveform conditions - enabling robust surge immunity per IEC 61000-4-5 Level 3 requirements when properly mounted.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	15 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for safe DC bias on protected line.
V_BR @ 1.0 mA	16.7 V min - Breakdown threshold at test current; ensures reliable turn-on before downstream IC damage thresholds.
V_C @ 5.0 A	23.6 V - Clamped voltage during 5 A transient; defines worst-case overvoltage seen by protected circuitry.
P_PPM	500 W - Peak pulse power handling (10/1000 µs); determines survivability against lightning-induced surges.
C_J @ 0 V	50 pF - Junction capacitance; low enough for <10 Mbps digital signal lines (e.g., RS-485, CAN) without distortion.
T_J max	175 °C - Maximum junction temperature; enables use in sealed enclosures or near heat sources without thermal shutdown.
Polarity	Unidirectional - Requires correct cathode orientation; not suitable for AC line protection without back-to-back pairing.

Pinout & Package

DO-15 (DO-204AC) molded epoxy package with axial leads; matte tin-plated terminals compliant with J-STD-002 solderability and JESD 201 Class 1A whisker resistance. Cathode indicated by color band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Ground-reference terminal	Connected to system ground or low-impedance return path; carries full surge current during clamping.
Cathode	Protected-line terminal	Connected to signal/power line being safeguarded; voltage at this node is clamped to ≤23.6 V during transients.

Key Features

Feature	Design Value
Glass passivated junction	Ensures stable breakdown voltage and long-term reliability under repeated surge stress without parameter drift.
500 W peak pulse power (10/1000 µs)	Supports IEC 61000-4-5 2nd edition surge immunity testing up to 1 kV open-circuit voltage with 2 Ω source impedance.
Low incremental surge resistance	Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving protection margin for sub-20 V logic ICs.
UL 94 V-0 molding compound	Meets flammability safety requirements for enclosed industrial and telecom equipment without additional flame-retardant barriers.
RoHS-compliant E3 suffix	Confirms compliance with EU RoHS Directive 2011/65/EU and JESD 201 Class 1A tin whisker mitigation for high-reliability deployments.

Applications

Industrial Sensor Interface	DC Power Input Protection
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (GPIO, UART) of PLC modules from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-mode TVS diode placed between signal line and chassis ground, conducting only during overvoltage events. Use Value: Limits clamped voltage to 23.6 V, preserving integrity of 24 V-rated op-amps and microcontrollers while surviving >1000 surges per IEC 61000-4-4.	Use Scenario: Safeguarding 12–24 V DC input rails of embedded controllers against load-dump spikes and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuse and downstream LC filtering. Use Value: Absorbs 500 W pulses without degradation, maintaining system uptime in factory automation where power interruptions cause costly downtime.
Automotive Body Control Module	Telecom Line Card Interface
Use Scenario: Shielding LIN bus transceivers and window motor drivers from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Unidirectional TVS on V_BAT-referenced signal paths; used with companion device for bidirectional protection if needed. Use Value: Withstands 175 °C junction temperature, enabling placement near engine bay electronics without thermal derating penalties.	Use Scenario: Guarding Ethernet PHY interface pins (MDI) and auxiliary control lines on DSLAM line cards against lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (50 pF) clamping element placed directly at connector entry point, minimizing stub length. Use Value: Preserves signal integrity up to 100 Mbps while meeting GR-1089-CORE Level 3 surge immunity for central office equipment.

Industrial Sensor Interface

DC Power Input Protection

Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (GPIO, UART) of PLC modules from field-wiring induced transients.

IC Role / Device Role / Timing Role: Standoff-mode TVS diode placed between signal line and chassis ground, conducting only during overvoltage events.

Use Value: Limits clamped voltage to 23.6 V, preserving integrity of 24 V-rated op-amps and microcontrollers while surviving >1000 surges per IEC 61000-4-4.

Use Scenario: Safeguarding 12–24 V DC input rails of embedded controllers against load-dump spikes and relay coil flyback.

IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, coordinated with upstream fuse and downstream LC filtering.

Use Value: Absorbs 500 W pulses without degradation, maintaining system uptime in factory automation where power interruptions cause costly downtime.

Automotive Body Control Module

Telecom Line Card Interface

Use Scenario: Shielding LIN bus transceivers and window motor drivers from battery line transients during jump-start or alternator load dump.

IC Role / Device Role / Timing Role: Unidirectional TVS on V_BAT-referenced signal paths; used with companion device for bidirectional protection if needed.

Use Value: Withstands 175 °C junction temperature, enabling placement near engine bay electronics without thermal derating penalties.

Use Scenario: Guarding Ethernet PHY interface pins (MDI) and auxiliary control lines on DSLAM line cards against lightning-induced surges.

IC Role / Device Role / Timing Role: Low-capacitance (50 pF) clamping element placed directly at connector entry point, minimizing stub length.

Use Value: Preserves signal integrity up to 100 Mbps while meeting GR-1089-CORE Level 3 surge immunity for central office equipment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ15A-E3/52	DO-214AA package; 600 W P_PPM; 24.4 V V_C @ 5 A; 100 pF C_J	Higher clamping voltage and capacitance; surface-mount only	Select when board space is constrained and higher surge rating justifies trade-off in signal integrity.
P6KE15A	DO-15 package; 600 W P_PPM; 24.4 V V_C @ 5 A; same 50 pF C_J; non-RoHS base version	No E3 suffix; lacks JESD 201 whisker qualification; identical mechanical fit	Choose only for legacy non-RoHS programs where traceability and whisker resistance are not required.

Compared with SAC15-E3/54, SMBJ15A-E3/52 offers higher surge rating but compromises signal fidelity due to doubled capacitance, while P6KE15A matches footprint and clamping performance but omits RoHS and whisker mitigation - making SAC15-E3/54 optimal for new industrial designs requiring compliance and reliability.

Availability

SAC15-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power input protection, and telecom line card designs requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.

Supply support for SAC15-E3/54 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and application-specific optimization.

The SAC series was developed specifically for cost-sensitive, high-volume transient suppression in industrial and automotive subsystems where DO-15 form factor, 500 W surge capability, and low clamping voltage are critical design constraints.

FAQ

What is the maximum clamping voltage of the SAC15-E3/54 under standard test conditions?

The SAC15-E3/54 has a maximum clamping voltage (V_C) of 23.6 V when subjected to a 5.0 A peak pulse current with a 10/1000 µs waveform. This value is measured at T_A = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring compatibility with 24 V logic and analog components. The SAC15-E3/54 maintains this clamping performance across its full operating temperature range.

Is the SAC15-E3/54 suitable for protecting bidirectional signal lines like RS-485 or CAN bus?

No - the SAC15-E3/54 is a unidirectional TVS diode and cannot protect against negative-going transients on bidirectional lines. For RS-485 or CAN, two SAC15-E3/54 devices must be connected in series opposition (anode-to-anode or cathode-to-cathode), or a dedicated bidirectional TVS such as SMAJ15CA should be selected. Using SAC15-E3/54 alone on such lines leaves the negative half-cycle unprotected.

What is the junction capacitance of the SAC15-E3/54, and how does it affect high-speed signal lines?

The SAC15-E3/54 has a typical junction capacitance of 50 pF at 0 V, which is low enough to avoid significant signal degradation on moderate-speed digital interfaces such as RS-485 (≤10 Mbps) or LIN bus (≤20 kbps). However, it is not recommended for USB 2.0 or HDMI signal lines where sub-2 pF capacitance is required. The 50 pF value is confirmed in the Vishay datasheet Document Number 88379, Table on page 2.

Does the SAC15-E3/54 meet RoHS and lead-free soldering requirements?

Yes - the "E3" suffix in SAC15-E3/54 indicates full compliance with the EU RoHS Directive 2011/65/EU and IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements. Its matte tin-plated leads are qualified per J-STD-002 for solderability and JESD 201 Class 1A for tin whisker resistance, supporting both reflow and wave soldering processes up to 275 °C for 10 seconds.

How does thermal derating impact the steady-state power dissipation of the SAC15-E3/54?

The SAC15-E3/54 is rated for 3.0 W power dissipation at T_L = 75 °C on an infinite heatsink, but this rating decreases linearly above 25 °C ambient per Figure 2 in the Vishay datasheet. At 75 °C ambient, its usable power drops to ~1.5 W. Engineers must apply this derating curve when designing for sealed enclosures or high-temperature environments to prevent thermal runaway or premature failure.

SAC15-E3/54 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: DO-204AC, DO-15, Axial

Series:: TransZorb®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 15V

Voltage - Breakdown (Min):: 16.7V

Voltage - Clamping (Max) @ Ipp:: 23.6V

Current - Peak Pulse (10/1000µs):: 20A

Power - Peak Pulse:: 500W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

SAC15-E3/54 FAQ

1.How can I place an order for SAC15-E3/54 through Aetrix?

Please submit a Request for Quotation (RFQ) for SAC15-E3/54 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 SAC15-E3/54 reliable?

The price and inventory of SAC15-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAC15-E3/54 is usually 5 days.

3.What payment methods are accepted for SAC15-E3/54?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAC15-E3/54 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SAC15-E3/54?

SAC15-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SAC15-E3/54 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 SAC15-E3/54?

For technical support, including SAC15-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAC15-E3/54 requirements.

6.How does Aetrix verify that SAC15-E3/54 is sourced from the original manufacturer or authorized distributors?

All SAC15-E3/54 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 SAC15-E3/54 meets industry standards.

7.What is the process for return or replacement of SAC15-E3/54?

All SAC15-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SAC15-E3/54, 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 SAC15-E3/54 part is unused and in its original packaging.

Return procedure for SAC15-E3/54:

1.Submit a request within 90 days.

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

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