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Vishay General Semiconductor - Diodes Division SMA5J8.5-E3/5A
- Part No.:
- SMA5J8.5-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5-E3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
SMA5J8.5-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 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 34.7 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the SMA5J8.5-E3/5A datasheet, SMA5J8.5-E3/5A pinout, SMA5J8.5-E3/5A application, or SMA5J8.5-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, RoHS-compliant matte tin-plated leads, AEC-Q101 qualification status, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional configuration enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device complies with ANSI/IEEE C62.35 for surge testing and meets J-STD-020 MSL Level 1 moisture sensitivity with 260 °C reflow peak. Thermal resistance is 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation under repetitive surge conditions when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets minimum system rail margin for safe standby operation |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - verified breakdown range ensures consistent turn-on across production lots and temperature |
| VC @ IPPM | 14.4 V at 34.7 A - clamping voltage limits downstream IC stress during 10/1000 µs surges per IEC 61000-4-5 |
| PPPM | 500 W - peak pulse power handling capacity defines survivability against lightning-induced or inductive-switching transients |
| TJ max | 150 °C - maximum junction temperature supports operation in under-hood automotive environments and enclosed industrial enclosures |
| Package | DO-214AC (SMA) - surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with standard 75 µm stencil apertures and reflow profiles |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge events only in uni-directional mode |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); initiates avalanche conduction when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualification | Validated for automotive-grade deployment including engine control units, body electronics, and ADAS sensor interfaces |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without baking preconditioning |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events, improving protection margin for 3.3 V/5 V logic interfaces |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of LDO regulators and microcontrollers. Use Value: Limits voltage excursion to ≤14.4 V during 500 W surges, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response shunt protector on 0–5 V or 4–20 mA output lines. Use Value: Responds in <1 ns to clamp transients while maintaining <1 µA leakage at 8.5 V, preserving signal integrity. |
| Consumer Device USB Port Surge Suppression | Telecom Equipment DC Power Rail Protection |
Use Scenario: Safeguarding USB VBUS lines in portable chargers and docking stations against hot-plug spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between connector and USB controller's VBUS pin. Use Value: Withstands ±15 kV contact ESD (IEC 61000-4-2) and clamps to 14.4 V, avoiding brownout or reset of connected peripherals. |
Use Scenario: Guarding -48 V telecom power distribution boards against lightning-induced surges on backplane feeds. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after bulk MOVs to handle residual fast-rising transients. Use Value: Delivers precise 8.5 V standoff and 14.4 V clamping, enabling tighter design margins than generic 12 V TVS devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5AHE3/5A | AEC-Q101 qualified version with identical electrical specs; same DO-214AC package and marking code 5AT | Required for automotive OEM designs requiring full qualification documentation and traceability | Select SMA5J8.5AHE3/5A when AEC-Q101 compliance is mandated; otherwise SMA5J8.5-E3/5A suffices for commercial/industrial use |
| SMCJ8.5A-E3/57T | Higher 1500 W PPPM, larger DO-214AB (SMC) package (7.11 mm × 6.22 mm), same VWM/VC ratings | Suitable where higher surge energy absorption is needed and PCB space allows larger footprint | Choose SMCJ8.5A-E3/57T only if system-level surge testing requires >500 W capability; SMA5J8.5-E3/5A offers optimal power density for space-constrained layouts |
Compared with SMA5J8.5AHE3/5A, the SMA5J8.5-E3/5A omits AEC-Q101 documentation but retains identical electrical performance and packaging; versus SMCJ8.5A-E3/57T, it trades surge capacity for 40% smaller board area and lower thermal mass - critical for high-density automotive modules and portable industrial controllers.
Availability
SMA5J8.5-E3/5A is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial PLC analog I/O protection, and telecom DC distribution systems requiring stable component supply, RoHS compliance, and SMT-ready tape-and-reel delivery.
Supply support for SMA5J8.5-E3/5A 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, power density, and automotive-grade qualification.
The SMA5J series targets high-energy transient suppression in space-constrained applications, combining 500 W surge capability with the compact DO-214AC footprint - engineered for automotive, industrial, and communications equipment needing robust, automated-placement-compatible TVS solutions.
FAQ
What is the polarity configuration of the SMA5J8.5-E3/5A?
The SMA5J8.5-E3/5A is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the DO-214AC package body, and it conducts only when reverse-biased above its breakdown voltage. This configuration blocks forward current flow under normal operation and activates clamping exclusively on overvoltage events at the cathode terminal - essential for protecting DC-powered circuits like automotive ECUs and industrial sensors.
Does the SMA5J8.5-E3/5A meet automotive qualification standards?
The SMA5J8.5-E3/5A is RoHS-compliant and manufactured to Vishay's commercial-grade specifications. While it shares identical electrical and mechanical characteristics with the AEC-Q101-qualified SMA5J8.5AHE3/5A variant, the SMA5J8.5-E3/5A itself is not AEC-Q101 certified. For automotive applications requiring formal qualification, the HE3-suffix version must be selected - the SMA5J8.5-E3/5A remains suitable for non-OEM industrial and consumer designs.
What is the maximum clamping voltage of the SMA5J8.5-E3/5A under surge conditions?
The SMA5J8.5-E3/5A has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 34.7 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the SMA5J8.5-E3/5A compare to SMAJ8.5A in terms of surge capability?
The SMA5J8.5-E3/5A delivers 500 W peak pulse power (PPPM) with a 10/1000 µs waveform, whereas the older SMAJ8.5A is rated for only 400 W. Both share the DO-214AC package and similar VWM/VBR values, but the SMA5J8.5-E3/5A's higher surge rating provides greater margin against severe transients such as ISO 7637-2 Pulse 5a load dump events - making it the preferred choice for next-generation automotive and industrial power protection.
What is the thermal resistance specification for the SMA5J8.5-E3/5A?
The SMA5J8.5-E3/5A exhibits a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W and a junction-to-lead resistance (RθJL) of 25 °C/W, measured under standard JEDEC test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads). These values inform thermal design decisions - for example, sustained 1 W dissipation raises junction temperature by ~80 °C above ambient, necessitating appropriate copper pour or airflow in high-reliability applications.
SMA5J8.5-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5-E3/5A FAQ
1.How can I place an order for SMA5J8.5-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5-E3/5A 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 SMA5J8.5-E3/5A reliable?
The price and inventory of SMA5J8.5-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5-E3/5A?
SMA5J8.5-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5-E3/5A 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 SMA5J8.5-E3/5A?
For technical support, including SMA5J8.5-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5-E3/5A requirements.
6.How does Aetrix verify that SMA5J8.5-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5-E3/5A 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 SMA5J8.5-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5-E3/5A?
All SMA5J8.5-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5-E3/5A, 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 SMA5J8.5-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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