My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SAC8.5-E3/54
- Part No.:
- SAC8.5-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SAC8.5-E3/54.pdf
- Description:
- TVS DIODE 8.5VWM 14VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SAC8.5-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor in DO-15 (DO-204AC) package, rated for 500 W peak pulse power (10/1000 μs), 8.5 V stand-off voltage (VWM), and 14.0 V maximum clamping voltage at 5.0 A. It protects sensitive signal lines in sensor units and IC interfaces against inductive switching transients.
For engineers reviewing the SAC8.5-E3/54 datasheet, SAC8.5-E3/54 pinout, SAC8.5-E3/54 application, or SAC8.5-E3/54 equivalent, key selection criteria include clamping voltage at rated IPP, reverse leakage at VWM, junction capacitance, thermal derating above 25 °C, and DO-15 lead-form compatibility with automated insertion.
Technical Context
The SAC8.5-E3/54 employs a glass-passivated silicon junction optimized for fast response to ESD and surge events, with typical junction capacitance of 50 pF at 0 V and <100 ns response time. Its unidirectional polarity-marked by a cathode band-enables asymmetric protection on DC-biased lines without requiring dual-device configurations.
Designed for repetitive surge handling at 0.01 % duty cycle, it delivers stable clamping performance up to 175 °C junction temperature and supports soldering per JESD 22-B106 (275 °C, 10 s). The device operates within -55 °C to +175 °C storage and operating range, with 3.0 W steady-state power dissipation on infinite heatsink at 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for DC bias on protected line |
| VBR @ IT = 1.0 mA | 9.44 V min - Breakdown threshold under standardized test current; ensures reliable turn-on during overvoltage |
| VC @ IPP = 5.0 A | 14.0 V max - Clamped voltage during 5 A transient; determines residual stress on downstream IC inputs |
| ID @ VWM | 50 μA max - Reverse leakage at stand-off voltage; critical for low-power sensor and battery-backed circuits |
| CJ @ 0 V | 50 pF - Junction capacitance at zero bias; limits high-frequency signal distortion on data lines up to ~100 MHz |
| PPPM | 500 W - Peak pulse power handling with 10/1000 μs waveform; defines survivability against IEC 61000-4-5 Level 4 surges |
| TJ max. | +175 °C - Maximum junction temperature; enables use in under-hood automotive or industrial enclosures without forced cooling |
Pinout & Package
Package: DO-15 (DO-204AC), axial-leaded, epoxy-molded, UL 94 V-0 rated. Cathode indicated by color band. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, whisker-tested per JESD 201 Class 1A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional TVS configuration | Connected to circuit ground or lowest potential node; completes conduction path during positive transients |
| Cathode | High-side connection, marked by band | Connected to protected line; conducts when line voltage exceeds VWM + dynamic margin relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable breakdown characteristics and long-term reliability under thermal cycling |
| 500 W peak pulse power (10/1000 μs) | Supports robust protection against lightning-induced surges per IEC 61000-4-5 and ISO 7637-2 Pulse 5a |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision |
| Fast response time (<100 ns) | Activates before most CMOS input structures can be damaged by ESD or EFT events |
| DO-15 mechanical compatibility | Enables drop-in replacement in legacy PCB footprints designed for standard axial TVS diodes |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module Inputs |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between sensor output and ADC input, referenced to system ground. Use Value: Limits clamped voltage to 14.0 V at 5 A, preventing latch-up or gate oxide damage in 12-bit SAR ADC front-ends. | Use Scenario: Safeguarding LIN bus receiver pins in door module ECUs subjected to load dump and jump-start transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS on LIN signal line, cathode tied to LIN bus, anode to chassis ground. Use Value: With 8.5 V VWM, it remains non-conductive during normal 12 V LIN operation while clamping 200 V spikes to ≤14.0 V. |
| Consumer IoT Wireless Module Power Rails | Telecom DSL Line Interface |
Use Scenario: Guarding 3.3 V supply rail of Wi-Fi/BLE SoCs against ESD from USB or button traces in smart home hubs. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated VDD line, downstream of primary bulk capacitor. Use Value: 50 μA max leakage at 8.5 V ensures no measurable impact on battery life in always-on edge devices. | Use Scenario: Bidirectional protection of ADSL line drivers using two SAC8.5-E3/54 devices in series-opposed configuration. IC Role / Device Role / Timing Role: One device handles positive transients, the other negative-both share same DO-15 footprint and thermal profile. Use Value: 50 pF junction capacitance avoids signal attenuation in 1–30 MHz DSL bands, preserving SNR and bit error rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/52 (Vishay) | Same VWM/VC, but SMB package (surface-mount); 600 W PPPM; 65 pF CJ | Requires re-layout for SMD footprint; better suited for high-density PCBs with automated assembly | Select when board space is constrained and thermal coupling to copper pour improves power handling |
| P6KE8.5A (ON Semiconductor) | Same DO-15 package and VWM; 600 W PPPM; 150 pF CJ; higher VC (15.0 V) | Higher capacitance limits use on >10 MHz lines; slightly looser clamping margin | Acceptable where cost sensitivity outweighs RF performance or tighter clamping is not required |
Compared with SAC8.5-E3/54, SMBJ8.5A-E3/52 offers higher surge rating and modern packaging but requires layout change, while P6KE8.5A trades lower cost and pin compatibility for reduced RF performance and relaxed clamping-making SAC8.5-E3/54 optimal for signal integrity-critical 8–12 V DC interfaces.
Availability
SAC8.5-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive body control module inputs, and consumer IoT wireless module power rails requiring stable component supply across multi-year production cycles.
Supply support for SAC8.5-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 application-specific optimization.
The SAC series is engineered for high-reliability transient suppression in harsh environments-designed to meet stringent automotive, industrial, and telecom surge immunity standards while maintaining low leakage and tight clamping.
FAQ
What is the maximum clamping voltage of the SAC8.5-E3/54 at its rated peak pulse current?
The SAC8.5-E3/54 has a maximum clamping voltage (VC) of 14.0 V when subjected to a 5.0 A peak pulse current (IPP) with a 10/1000 μs waveform. This value is measured per the conditions specified in the Vishay datasheet Document Number 88379 and defines the upper voltage limit imposed on the protected circuit during transient events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings.
Does the SAC8.5-E3/54 meet RoHS requirements?
Yes, the SAC8.5-E3/54 is RoHS-compliant and commercial grade, as indicated by the "E3" suffix in its part number. It conforms to the material restrictions defined in Directive 2011/65/EU and meets Vishay's material categorization standard per document 99912. The matte tin-plated leads and UL 94 V-0 molded epoxy housing further support environmental compliance and process compatibility.
Can SAC8.5-E3/54 be used for bidirectional transient protection?
No, SAC8.5-E3/54 is a unidirectional TVS diode and must be used with a second unit in series-opposed polarity for full AC or bidirectional protection. Its electrical specification table explicitly lists "Unidirectional" polarity, and the cathode band marking confirms single-direction conduction. For true bidirectional behavior, two SAC8.5-E3/54 devices are required-one anode-to-line, one cathode-to-line-or a dedicated bidirectional part like SMAJ8.5CA should be selected.
What is the junction capacitance of SAC8.5-E3/54 and how does it affect high-speed signal lines?
The SAC8.5-E3/54 has a maximum junction capacitance of 50 pF at 0 V, as specified in the Electrical Characteristics table. This low capacitance minimizes loading on signal paths, enabling safe use on data lines operating up to approximately 100 MHz without significant rise-time degradation or signal reflection. It is particularly suitable for protecting UART, I²C, and analog sensor outputs where bandwidth preservation is essential.
How does the thermal derating of SAC8.5-E3/54 work above 25 °C ambient?
The SAC8.5-E3/54 follows a linear derating curve above 25 °C ambient temperature, as shown in Figure 2 of the datasheet. Its 3.0 W steady-state power dissipation drops to zero at +175 °C junction temperature. For example, at 75 °C ambient with infinite heatsink, it retains full 3.0 W rating; at 125 °C ambient, allowable power reduces to ~1.5 W. Designers must calculate junction temperature using θJA or θJL values and ensure TJ stays within -55 °C to +175 °C limits during sustained operation.
SAC8.5-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
SAC8.5-E3/54 FAQ
1.How can I place an order for SAC8.5-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAC8.5-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 SAC8.5-E3/54 reliable?
The price and inventory of SAC8.5-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 SAC8.5-E3/54 is usually 5 days.
3.What payment methods are accepted for SAC8.5-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAC8.5-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAC8.5-E3/54?
SAC8.5-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAC8.5-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 SAC8.5-E3/54?
For technical support, including SAC8.5-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAC8.5-E3/54 requirements.
6.How does Aetrix verify that SAC8.5-E3/54 is sourced from the original manufacturer or authorized distributors?
All SAC8.5-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 SAC8.5-E3/54 meets industry standards.
7.What is the process for return or replacement of SAC8.5-E3/54?
All SAC8.5-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SAC8.5-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 SAC8.5-E3/54 part is unused and in its original packaging.
Return procedure for SAC8.5-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SAC8.5-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
