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Vishay General Semiconductor - Diodes Division SAC50-E3/54
- Part No.:
- SAC50-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SAC50-E3/54.pdf
- Description:
- TVS DIODE 50VWM 88VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,804
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Product details
Overview
SAC50-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping fast-rising ESD and surge transients on signal lines. It delivers 500 W peak pulse power (10/1000 μs), clamps at 88.0 V @ 5.8 A, and features 5.0 V working standoff voltage with only 5.0 μA max reverse leakage.
For engineers reviewing the SAC50-E3/54 datasheet, SAC50-E3/54 pinout, SAC50-E3/54 application, or SAC50-E3/54 equivalent, key selection criteria include clamping voltage margin versus protected IC's absolute maximum rating, junction capacitance impact on high-speed signal integrity, thermal derating above 25 °C, and DO-15 lead-form compatibility with legacy PCB footprints.
Technical Context
The SAC50-E3/54 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 55.5 V minimum breakdown voltage (VBR @ 1.0 mA). Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 μs pulses at 0.01% duty cycle.
It is rated for continuous power dissipation of 3.0 W on an infinite heatsink at TL = 75 °C and supports operation across -55 °C to +175 °C junction temperature range. The device uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 50 V - Maximum DC or RMS voltage the device blocks continuously without conduction |
| VBR (min) | 55.5 V @ 1.0 mA - Ensures reliable turn-on before protected circuit exceeds safe voltage limits |
| VC | 88.0 V @ IPP = 5.8 A - Clamped voltage seen by downstream IC during worst-case surge event |
| PPPM | 500 W (10/1000 μs) - Peak transient energy absorption capability without failure |
| Junction Capacitance | 50 pF @ 0 V - Low enough to avoid signal distortion on moderate-speed data lines (e.g., RS-485, CAN) |
| TJ max | +175 °C - Enables use in high-temperature industrial environments without thermal shutdown |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded case with UL 94 V-0 rating; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / surge return path | Connected to ground or low-impedance reference plane to sink transient current |
| Cathode | Protected line connection | Connected to signal line being safeguarded; polarity must match unidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal cycling |
| 500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) when properly routed |
| Low 50 pF junction capacitance | Minimizes signal rise-time degradation on lines up to ~10 Mbps (e.g., industrial CAN FD) |
| Matte tin-plated leads | Guarantees solder wetting per J-STD-002, supporting automated reflow and wave soldering |
Applications
| Industrial Sensor Interface Protection | RS-485 Communication Line Clamp |
|---|---|
Use Scenario: Protecting analog output pins of pressure/temperature sensors exposed to relay-switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and system ground to clamp inductive kickback spikes. Use Value: Limits transient voltage to ≤88.0 V, preventing latch-up or gate oxide damage in downstream op-amps or ADC drivers. | Use Scenario: Safeguarding differential RS-485 transceivers connected to long cable runs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Paired SAC50-E3/54 units (anode-to-cathode) used in bidirectional configuration across A/B lines. Use Value: Provides symmetrical clamping with <50 pF per diode, preserving signal edge fidelity while meeting IEC 61000-4-5 surge immunity requirements. |
| Power Supply Input Surge Suppression | Automotive Body Control Module (BCM) Signal Line Guard |
Use Scenario: Secondary overvoltage protection on 24 V DC input rails feeding microcontrollers after primary DC/DC regulation. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing residual transients that bypass upstream LC filters. Use Value: Withstands 500 W pulses without degradation, maintaining 50 V working voltage margin above nominal 24 V rail. | Use Scenario: Shielding LIN bus or switch inputs in BCMs from load-dump and jump-start events in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional clamping element referenced to chassis ground, triggered only on positive-going transients. Use Value: Survives 175 °C junction temperature during under-hood thermal soak, ensuring reliability across automotive lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ50A-E3/52 | Same VWM (50 V), but SMB package (surface-mount); 600 W PPPM; 65 pF CJ | Requires PCB redesign for SMD footprint; higher capacitance may affect >5 Mbps signals | Select when board space is constrained and reflow assembly is preferred over through-hole |
| P6KE51A | Lower PPPM (600 W), same DO-15 package; VWM = 43.6 V; VC = 70.1 V @ 8.5 A | Clamps lower but offers less margin against 50 V system overvoltage; not RoHS-compliant (Pb-bearing) | Choose for cost-sensitive industrial designs where 43.6 V standoff suffices and lead-free compliance is not required |
Compared with SMBJ50A-E3/52 and P6KE51A, the SAC50-E3/54 provides optimal balance of low capacitance (50 pF), RoHS-compliant DO-15 through-hole compatibility, and precise 50 V standoff-making it ideal for legacy-replacement and signal-integrity-critical applications where leaded assembly remains standard.
Availability
SAC50-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication systems, and automotive body control modules requiring stable component supply and long-lifecycle support.
Supply support for SAC50-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 and performance in harsh environments.
The SAC series was developed specifically for robust, low-capacitance transient suppression in signal-line and power-rail applications across industrial, telecom, and automotive sectors-prioritizing clamping precision and thermal resilience.
FAQ
What is the maximum clamping voltage of the SAC50-E3/54 under standard test conditions?
The SAC50-E3/54 has a maximum clamping voltage (VC) of 88.0 V when subjected to a 5.8 A peak pulse current with a 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. Designers must verify that this clamping level remains below the absolute maximum ratings of downstream components. The SAC50-E3/54 maintains this specification across its full operating temperature range.
Is the SAC50-E3/54 suitable for bidirectional transient protection?
No-the SAC50-E3/54 is a unidirectional TVS diode, intended for clamping positive transients relative to ground. For AC or bidirectional signal lines (e.g., RS-485, USB), two SAC50-E3/54 units must be connected in series opposition (anode-to-anode or cathode-to-cathode) to achieve symmetrical clamping. Using a single SAC50-E3/54 on bidirectional lines leaves negative transients unprotected and risks forward conduction damage.
What is the junction capacitance of the SAC50-E3/54, and how does it affect high-speed signal lines?
The SAC50-E3/54 exhibits 50 pF typical junction capacitance at 0 V bias, making it suitable for data lines operating up to ~10 Mbps (e.g., CAN FD, RS-485) without significant edge rounding. At higher frequencies, this capacitance forms a low-pass filter with trace impedance; designers should simulate signal integrity using the exact layout parasitics. The low capacitance directly results from optimized die geometry and glass passivation, distinguishing it from higher-capacitance alternatives like P6KE series.
Does the SAC50-E3/54 meet RoHS and lead-free soldering requirements?
Yes-the "E3" suffix confirms SAC50-E3/54 is RoHS-compliant and manufactured with lead-free terminations. Its matte tin-plated leads meet J-STD-002 for solderability and JESD 22-B102 for intermetallic growth resistance. The device withstands solder dip at 275 °C for up to 10 seconds per JESD 22-B106, supporting both wave and selective soldering processes without degradation of electrical parameters.
How does thermal derating impact the power handling of the SAC50-E3/54 above 25 °C ambient?
The SAC50-E3/54's peak pulse power (500 W) is specified at TA = 25 °C and must be linearly derated above that temperature per Figure 2 in the datasheet. At 75 °C ambient, its continuous power dissipation drops to 3.0 W on an infinite heatsink; for pulse operation, designers must consult the derating curve to determine allowable duty cycle or reduced IPP. Junction temperature must remain ≤175 °C-exceeding this limit risks irreversible parametric shift or catastrophic failure of the SAC50-E3/54.
SAC50-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):
- 50V
- Voltage - Breakdown (Min):
- 55.5V
- Voltage - Clamping (Max) @ Ipp:
- 88V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SAC50-E3/54 FAQ
1.How can I place an order for SAC50-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAC50-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 SAC50-E3/54 reliable?
The price and inventory of SAC50-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 SAC50-E3/54 is usually 5 days.
3.What payment methods are accepted for SAC50-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAC50-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAC50-E3/54?
SAC50-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAC50-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 SAC50-E3/54?
For technical support, including SAC50-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAC50-E3/54 requirements.
6.How does Aetrix verify that SAC50-E3/54 is sourced from the original manufacturer or authorized distributors?
All SAC50-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 SAC50-E3/54 meets industry standards.
7.What is the process for return or replacement of SAC50-E3/54?
All SAC50-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SAC50-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 SAC50-E3/54 part is unused and in its original packaging.
Return procedure for SAC50-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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