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Vishay General Semiconductor - Diodes Division SAC12-E3/54
- Part No.:
- SAC12-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SAC12-E3/54.pdf
- Description:
- TVS DIODE 12VWM 19VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:10,832
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Product details
Overview
SAC12-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping inductive switching transients and ESD events on signal lines. It features 12 V standoff voltage (VWM), 13.3 V minimum breakdown voltage (VBR), 19.0 V maximum clamping voltage at 5.0 A (VC), 500 W peak pulse power (10/1000 μs), and operates from –55 °C to +175 °C - used in sensor interface protection for industrial control systems.
For engineers reviewing the SAC12-E3/54 datasheet, SAC12-E3/54 pinout, SAC12-E3/54 application, or SAC12-E3/54 equivalent, key selection criteria include clamping voltage margin relative to 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 SAC12-E3/54 employs a glass-passivated silicon junction optimized for low incremental surge resistance and sub-nanosecond response to fast-rising transients. Its unidirectional polarity enables targeted suppression of positive-going overvoltage events while maintaining low leakage (<5.0 μA at 12 V) during normal operation.
Rated for 500 W peak pulse power per 10/1000 μs waveform and 3.0 W steady-state dissipation on infinite heatsink, it supports repetitive surge handling only at ≤0.01 % duty cycle. Junction temperature must remain ≤175 °C, with derating applied linearly above TA = 25 °C per Figure 2 of document 88379.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse working voltage before clamping begins; sets upper limit for safe DC bias on protected line |
| VBR (min) | 13.3 V at IT = 1.0 mA - guaranteed avalanche initiation threshold; ensures reliable turn-on before downstream IC damage |
| VC (max) | 19.0 V at IPP = 5.0 A - worst-case clamped voltage seen by load; must stay below protected device's absolute max rating |
| PPPM | 500 W (10/1000 μs) - peak transient energy absorption capability; defines survivability against IEC 61000-4-5 Level 3 surges |
| ID (max) | 5.0 μA at VWM - reverse leakage current; low enough to avoid loading high-impedance sensor outputs or battery-powered circuits |
| TJ max. | +175 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments |
| Package | DO-15 (DO-204AC) - industry-standard axial-leaded package with 0.250" lead spacing; compatible with wave-solder and hand-solder processes |
Pinout & Package
DO-15 (DO-204AC) package: axial-leaded, molded epoxy body with cathode band marking; leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes conduction path during positive transient clamp |
| Cathode | Protected line input | Connected to signal/power line being safeguarded; color band identifies this terminal; reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against lightning-induced surges and inductive kickback in motor drives and relay interfaces |
| Low incremental surge resistance | Minimizes voltage overshoot during high di/dt events, improving clamping precision for sensitive analog inputs |
| Fast response time | Sub-nanosecond turn-on ensures suppression occurs before transient propagates into protected IC input stages |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test and commercial-grade environmental compliance requirements |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting 0–10 V analog output lines from relay coil flyback and ESD in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input, with cathode tied to signal line. Use Value: Clamps transients to ≤19.0 V, preserving ADC input stage integrity without affecting 12-bit measurement accuracy due to <5.0 μA leakage. | Use Scenario: Safeguarding LIN bus slave node inputs against load dump and jump-start induced spikes in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line, operating below 12 V system nominal with fast clamping during 24 V transients. Use Value: Withstands 500 W pulses while maintaining <19.0 V clamping, preventing LIN transceiver latch-up and ensuring protocol-level fault recovery. |
| Consumer Appliance Motor Drive Feedback | Telecom Power Supply Input Stage |
Use Scenario: Shielding hall-effect rotor position feedback signals in BLDC fan controllers from MOSFET switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential hall sensor outputs, minimizing signal distortion at 20 kHz PWM frequencies. Use Value: Junction capacitance not specified but consistent with low-C family design; enables clean edge detection without RC filtering penalties. | Use Scenario: Secondary-side transient suppression on 12 V DC-DC converter outputs feeding baseband processors in small-cell radios. IC Role / Device Role / Timing Role: Final-stage overvoltage clamp after bulk regulation, absorbing residual ripple-induced spikes before LDO input. Use Value: 175 °C max junction temperature allows placement near hot power inductors without thermal derating concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57 | Same VWM (12 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB redesign for SMD footprint; better suited for space-constrained consumer designs | Select when board area is limited and wave-solder compatibility is not required |
| P6KE12A | Same VWM (12 V), same DO-15 package, but higher VC (20.1 V) and lower IPP (27.3 A) | Marginally higher clamping voltage reduces safety margin for 15 V-tolerant ICs | Select only if cost sensitivity outweighs clamping performance; verify VC margin against load IC ratings |
Compared with SMAJ12A-E3/57 and P6KE12A, SAC12-E3/54 delivers superior clamping voltage (19.0 V vs. ≥20.1 V) and higher surge capacity (500 W) in a through-hole DO-15 package - making it optimal for industrial field devices requiring mechanical robustness and thermal resilience.
Availability
SAC12-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power supplies, and appliance motor control systems requiring stable component supply and long-lifecycle support.
Supply support for SAC12-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, and protection devices with emphasis on reliability, ruggedness, and application-specific optimization.
The SAC series is engineered for high-energy transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where failure tolerance and thermal endurance are critical.
FAQ
What is the maximum clamping voltage of SAC12-E3/54 at 5.0 A peak pulse current?
The SAC12-E3/54 has a maximum clamping voltage (VC) of 19.0 V when subjected to a 5.0 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 3 in Vishay document 88379 and defines the upper voltage limit imposed on the protected circuit during surge events. Maintaining VC below the absolute maximum rating of downstream components is essential for reliable protection - the SAC12-E3/54 achieves this with margin for 15 V-rated ICs.
Does SAC12-E3/54 support bidirectional transient suppression?
No, SAC12-E3/54 is a unidirectional TVS diode, meaning it clamps only positive-going transients relative to its cathode terminal. For AC line or bidirectional signal protection, two SAC12-E3/54 units must be connected in series opposition (anode-to-anode or cathode-to-cathode), as shown in Figure 4 of the SAC5.0–SAC50 datasheet. Using a single SAC12-E3/54 for bidirectional threats leaves negative excursions unprotected.
What is the reverse leakage current specification for SAC12-E3/54 at its working voltage?
The SAC12-E3/54 exhibits a maximum reverse leakage current (ID) of 5.0 μA when biased at its 12 V standoff voltage (VWM) and tested at 25 °C. This low leakage ensures minimal loading of high-impedance sensor outputs or battery-backed circuits. Leakage increases with temperature and voltage - actual values at elevated ambient should be verified using the derating curves in document 88379.
Can SAC12-E3/54 be used in automotive under-hood applications?
Yes, SAC12-E3/54 is rated for junction temperatures up to +175 °C and is constructed with UL 94 V-0 compliant epoxy, making it suitable for under-hood automotive environments when thermally managed. Its DO-15 package supports standard lead-forming and wave-solder processes common in automotive module assembly. However, full qualification per AEC-Q101 requires verification by the end customer - SAC12-E3/54 is commercial-grade, not automotive-qualified out-of-box.
What does the "E3/54" suffix indicate in SAC12-E3/54?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction meeting JESD 201 Class 1A whisker testing, while "/54" specifies the preferred packaging option: 13-inch diameter paper tape and reel, with 4000 units per reel and 0.432 g unit weight. This format ensures compatibility with automated pick-and-place and wave-solder processes. The base part number SAC12 remains unchanged across packaging variants.
SAC12-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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19V
- Current - Peak Pulse (10/1000µs):
- 25A
- 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)
SAC12-E3/54 FAQ
1.How can I place an order for SAC12-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAC12-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 SAC12-E3/54 reliable?
The price and inventory of SAC12-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 SAC12-E3/54 is usually 5 days.
3.What payment methods are accepted for SAC12-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAC12-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAC12-E3/54?
SAC12-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAC12-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 SAC12-E3/54?
For technical support, including SAC12-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAC12-E3/54 requirements.
6.How does Aetrix verify that SAC12-E3/54 is sourced from the original manufacturer or authorized distributors?
All SAC12-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 SAC12-E3/54 meets industry standards.
7.What is the process for return or replacement of SAC12-E3/54?
All SAC12-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SAC12-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 SAC12-E3/54 part is unused and in its original packaging.
Return procedure for SAC12-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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