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Vishay General Semiconductor - Diodes Division SA8.5AHE3/54
- Part No.:
- SA8.5AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA8.5AHE3/54.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,657
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Product details
Overview
SA8.5AHE3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor diode in DO-15 package, designed for circuit protection against ESD and inductive switching transients. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V clamping voltage (VC) at 10 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA8.5AHE3/54 datasheet, SA8.5AHE3/54 pinout, SA8.5AHE3/54 application, or SA8.5AHE3/54 equivalent, key selection criteria include unidirectional polarity, DO-15 mechanical compatibility, 175 °C max junction temperature, low incremental surge resistance, and compliance with JESD 22-B102 solderability standards.
Technical Context
The SA8.5AHE3/54 operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and stable clamping under repetitive 10/1000 µs surge conditions. Its unidirectional configuration enables cathode-referenced protection on DC power rails and signal lines where polarity is fixed.
Designed for high-reliability environments, it supports 70 A non-repetitive forward surge current (IFSM), maintains ≤1.0 µA reverse leakage at VWM, and exhibits +8 mV/°C breakdown voltage temperature coefficient - enabling predictable thermal drift in automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - defines guaranteed avalanche onset range for design margining |
| VC @ IPPM | 14.4 V at 10 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 500 W - peak transient energy absorption capability per single pulse |
| IFSM | 70 A - surge current handling for 10 ms half-sine waveform, critical for load-dump immunity |
| TJ max. | +175 °C - enables operation in engine control units and powertrain modules |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy-molded case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band; lead length ≥25.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line's lower-potential side (e.g., GND or return path) |
| Cathode | Current exit point in forward bias; clamping node in reverse bias | Connected to protected line's higher-potential side (e.g., VCC or signal source); color-banded end |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures long-term reliability and stable VBR over temperature and life cycles |
| 500 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges without degradation |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| AEC-Q101 qualified | Validated for automotive-grade deployment including temperature cycling, HTRB, and UHAST |
| Solder dip 275 °C max. for 10 s | Compatible with standard wave and reflow solder processes without delamination |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp spikes up to ±120 V. Use Value: Limits voltage seen by MCU and CAN transceivers to ≤14.4 V during 10 A surge, preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC I/O modules. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS on signal line to ground, preserving millivolt-level accuracy. Use Value: Clamps ESD events (IEC 61000-4-2 ±8 kV contact) without affecting 0–5 V sensor output linearity or offset. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side DC input protection in wall adapters powering USB-C PD controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing switching noise and lightning-induced surges on 5–9 V rails. Use Value: Maintains 8.5 V nominal operation while clamping 10/1000 µs transients to 14.4 V, avoiding brownout resets. | Use Scenario: Front-end protection of Ethernet PHY interfaces exposed to induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Unidirectional clamping device on biased MDI lines referenced to local ground plane. Use Value: Provides <1 ns response and 500 W pulse handling to meet GR-1089-CORE Level 3 telecom surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A | Same VWM (8.5 V) and VC (14.4 V), but SMA package (surface-mount, smaller footprint) | Requires PCB redesign for SMT vs. through-hole DO-15; lower IFSM (50 A vs. 70 A) | Select SMAJ8.5A only when board space is constrained and surge current demand ≤50 A |
| P6SMB8.5A | Identical electrical specs (VWM, VBR, VC, PPPM), same DO-15 package, but commercial-grade (not AEC-Q101) | Lacks automotive qualification; unsuitable for Tier-1 vehicle systems requiring AEC-Q101 traceability | Choose P6SMB8.5A for cost-sensitive industrial or consumer designs without automotive compliance needs |
Compared with SMAJ8.5A and P6SMB8.5A, the SA8.5AHE3/54 uniquely combines AEC-Q101 qualification, 70 A IFSM, and DO-15 through-hole robustness - making it the preferred choice for automotive power distribution and high-reliability industrial control applications where mechanical retention and surge margin are critical.
Availability
SA8.5AHE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom line card designs requiring stable component supply, full AEC-Q101 traceability, and DO-15 mechanical compatibility.
Supply support for SA8.5AHE3/54 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 and automotive-grade performance.
The SAxxA series is part of Vishay's TransZORB® TVS family, engineered specifically for robust transient suppression in harsh environments - targeting automotive power systems, industrial automation, and infrastructure equipment.
FAQ
What is the polarity configuration of the SA8.5AHE3/54?
The SA8.5AHE3/54 is a unidirectional transient voltage suppressor diode. Its cathode is marked with a color band on the DO-15 package body, and it conducts in forward bias like a standard diode while clamping reverse transients above its breakdown voltage. This configuration is intended for DC rail protection where polarity is fixed, unlike bidirectional variants that suppress both positive and negative surges.
Does the SA8.5AHE3/54 meet automotive qualification standards?
Yes, the SA8.5AHE3/54 is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88378, Revision 27-Sep-2021). The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction, including validation for temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress testing (UHAST).
What is the maximum clamping voltage of the SA8.5AHE3/54 under surge conditions?
The SA8.5AHE3/54 has a maximum clamping voltage (VC) of 14.4 V at 10 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions and ensures downstream components see no more than 14.4 V during transient events - critical for protecting 3.3 V or 5 V logic interfaces and analog sensors.
Can the SA8.5AHE3/54 be used in bidirectional signal line protection?
No, the SA8.5AHE3/54 is strictly unidirectional and must not be used on AC-coupled or bipolar signal lines. For bidirectional protection, Vishay offers the SA8.5CA variant (with CA suffix), which provides symmetrical clamping for both polarities. Using SA8.5AHE3/54 on bidirectional lines risks forward conduction during negative half-cycles and failure to suppress negative transients.
What is the reverse leakage current specification for the SA8.5AHE3/54 at rated stand-off voltage?
At its 8.5 V stand-off voltage (VWM) and TA = 25 °C, the SA8.5AHE3/54 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage preserves signal integrity in high-impedance sensor circuits and minimizes standby power loss in battery-powered systems.
SA8.5AHE3/54 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:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 34.7A
- 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)
SA8.5AHE3/54 FAQ
1.How can I place an order for SA8.5AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA8.5AHE3/54 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 SA8.5AHE3/54 reliable?
The price and inventory of SA8.5AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA8.5AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA8.5AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA8.5AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA8.5AHE3/54?
SA8.5AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA8.5AHE3/54 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 SA8.5AHE3/54?
For technical support, including SA8.5AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA8.5AHE3/54 requirements.
6.How does Aetrix verify that SA8.5AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA8.5AHE3/54 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 SA8.5AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA8.5AHE3/54?
All SA8.5AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA8.5AHE3/54, 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 SA8.5AHE3/54 part is unused and in its original packaging.
Return procedure for SA8.5AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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