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Vishay General Semiconductor - Diodes Division SA8.5CHE3/54
- Part No.:
- SA8.5CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.5CHE3/54.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,885
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Product details
Overview
SA8.5CHE3/54 from Vishay General Semiconductor is a bi-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for clamping voltage transients on signal or power lines. It features 500 W peak pulse power (10/1000 μs), 8.5 V stand-off voltage (VWM), 14.4 V maximum clamping voltage (VC) at 10 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA8.5CHE3/54 datasheet, SA8.5CHE3/54 pinout, SA8.5CHE3/54 application, or SA8.5CHE3/54 equivalent, this part serves as a robust, RoHS-compliant, high-reliability TVS for protecting sensitive ICs, MOSFETs, and sensor signal lines against inductive switching surges and ESD events in automotive and industrial environments.
Technical Context
The SA8.5CHE3/54 operates as a bi-directional avalanche diode with symmetrical breakdown characteristics - minimum VBR = 9.44 V and maximum VBR = 10.4 V at 1.0 mA test current. Its clamping performance is validated under 10/1000 μs waveform, delivering 14.4 V clamping at 10 A peak pulse current (IPPM), with low incremental surge resistance ensuring effective transient suppression.
It supports operating junction temperatures from –55 °C to +175 °C, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability rating via its molded epoxy DO-204AC case. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 9.44 V / 10.4 V at 1.0 mA - Confirmed bi-directional avalanche threshold; ensures symmetric protection in AC-coupled or floating lines. |
| VC @ IPPM | 14.4 V at 10 A - Clamping voltage under 10/1000 μs surge; limits downstream voltage stress to safe levels for 3.3 V or 5 V logic interfaces. |
| PPPM | 500 W - Peak pulse power handling capability; sustains repetitive 0.01% duty cycle transients without degradation. |
| IPPM | 10 A - Peak pulse current capacity per 10/1000 μs waveform; directly determines protected line's surge immunity level. |
| TJ max | +175 °C - Maximum junction temperature; enables reliable operation in under-hood automotive or high-ambient industrial environments. |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
Pinout & Package
Package: DO-204AC (DO-15), molded epoxy case with matte tin-plated axial leads. Bi-directional construction means no polarity marking; both terminals are electrically identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | Either terminal may serve as anode or cathode; enables placement in AC or floating circuits without orientation constraints. |
| Lead 1 | Current path input/output | Conducts surge current bidirectionally; lead length (0.375") impacts thermal dissipation and PCB trace inductance during transient events. |
| Lead 2 | Current path input/output | Matches Lead 1 electrically and thermally; symmetry ensures balanced clamping in differential or ungrounded signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, low-leakage (<1.0 μA at VWM) performance over lifetime and temperature extremes. |
| 500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge immunity without derating in standard PCB layouts. |
| AEC-Q101 qualification (HE3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-failure field reliability. |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosed enclosures - critical for compliance in automotive and industrial safety certifications. |
| RoHS-compliant & JESD 201 Class 2 whisker resistant | Ensures long-term solder joint integrity in high-vibration environments and eliminates hazardous substance risks in global supply chains. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed across differential signal pair or supply rail to limit transient excursions within IC absolute maximum ratings. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while preserving <1 μA leakage at 8.5 V nominal supply - preventing false triggers or bias shift. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between input line and ground to shunt >10 A surge currents away from optocoupler input stages. Use Value: Clamps to ≤14.4 V within nanoseconds, keeping optocoupler LED forward voltage below destructive threshold and enabling >100,000-cycle surge endurance. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for USB-C PD and fast-charging devices exposed to lightning-induced surges on DC output lines. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5–20 V output rails to absorb residual transients escaping primary-side MOVs and Y-capacitors. Use Value: Delivers precise 8.5 V standoff with 14.4 V clamping - compatible with USB PD 3.0 voltage negotiation windows and avoids false overvoltage shutdowns. |
Use Scenario: Protection of Ethernet PHY interface pins (e.g., RJ45 magnetics secondary side) against ESD (IEC 61000-4-2 ±8 kV contact) and surge (IEC 61000-4-5) in VoIP gateways and network switches. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS placed across differential pairs to suppress common-mode transients without distorting 100BASE-TX signal integrity. Use Value: Symmetric clamping ensures equal response on both lines, minimizing skew and maintaining <1 pF parasitic capacitance impact - verified per IEEE 802.3 timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ8.5CA | Same DO-214AC package, identical VWM/VC specs, but rated for 400 W PPPM (vs. 500 W); slightly higher leakage (5 μA). | Lower peak power margin reduces margin for repeated surge events in high-durability industrial systems. | Select when footprint compatibility with SMA package is required and 400 W suffices for IEC 61000-4-5 Level 2 compliance. |
| ON Semiconductor 1.5SMC8.5CA | DO-214AB package, same electrical specs, but higher thermal resistance (RθJA = 60 °C/W vs. ~50 °C/W for DO-15); not AEC-Q101 qualified. | Lacks automotive qualification and has reduced thermal headroom in confined PCB areas. | Prefer for cost-sensitive consumer applications where AEC-Q101 is unnecessary and board space allows larger SMC outline. |
Compared with SMAJ8.5CA and 1.5SMC8.5CA, SA8.5CHE3/54 delivers superior 500 W surge handling, lower thermal resistance due to DO-204AC geometry, and certified AEC-Q101 reliability - making it the optimal choice for automotive and mission-critical industrial designs demanding proven field longevity.
Availability
SA8.5CHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O conditioning, and telecom line interface hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for SA8.5CHE3/54 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, efficiency, and application-specific optimization.
The SAxxxC series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure tolerance and long-term stability are non-negotiable design requirements.
FAQ
What is the polarity configuration of SA8.5CHE3/54?
The SA8.5CHE3/54 is a bi-directional TVS diode with symmetrical avalanche characteristics - neither terminal is marked, and either lead may serve as anode or cathode. This enables direct placement across AC-coupled signals, differential pairs, or ungrounded power rails without orientation concerns, unlike uni-directional variants such as SA8.5A.
Does SA8.5CHE3/54 meet automotive qualification standards?
Yes, the HE3 suffix on SA8.5CHE3/54 explicitly denotes AEC-Q101 qualification, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. This certification validates its use in automotive powertrain, chassis, and infotainment modules where zero-field-failure reliability is mandated.
What is the maximum clamping voltage of SA8.5CHE3/54 under surge conditions?
The SA8.5CHE3/54 clamps to a maximum of 14.4 V at 10 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and guarantees downstream circuit protection even during worst-case transient events.
How does the DO-204AC package of SA8.5CHE3/54 affect thermal performance?
The DO-204AC (DO-15) package of SA8.5CHE3/54 provides lower thermal resistance than surface-mount alternatives like DO-214AB - enabling more efficient heat dissipation during repetitive surges. Its axial lead form also simplifies through-hole mounting in high-vibration automotive harnesses and industrial backplanes.
Is SA8.5CHE3/54 compatible with lead-free reflow and wave soldering processes?
Yes, SA8.5CHE3/54 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, supporting both lead-free wave soldering (up to 275 °C for 10 s) and reflow profiles. The HE3 suffix further confirms JESD 201 Class 2 whisker resistance, ensuring solder joint integrity after thermal cycling.
SA8.5CHE3/54 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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 15.9V
- Current - Peak Pulse (10/1000µs):
- 31.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA8.5CHE3/54 FAQ
1.How can I place an order for SA8.5CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.5CHE3/54 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 SA8.5CHE3/54 reliable?
The price and inventory of SA8.5CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.5CHE3/54 is usually 5 days.
3.What payment methods are accepted for SA8.5CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.5CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.5CHE3/54?
SA8.5CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.5CHE3/54 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 SA8.5CHE3/54?
For technical support, including SA8.5CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.5CHE3/54 requirements.
6.How does Aetrix verify that SA8.5CHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA8.5CHE3/54 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 SA8.5CHE3/54 meets industry standards.
7.What is the process for return or replacement of SA8.5CHE3/54?
All SA8.5CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.5CHE3/54, 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 SA8.5CHE3/54 part is unused and in its original packaging.
Return procedure for SA8.5CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA8.5CHE3/54 Tags
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