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Vishay General Semiconductor - Diodes Division SMA5J8.5-E3/61
- Part No.:
- SMA5J8.5-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5-E3/61.pdf
- Description:
- TVS DIODE 8.5VWM 15.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,379
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Product details
Overview
SMA5J8.5-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor diode in DO-214AC (SMA) package, designed for high-energy surge protection on DC power rails and signal lines. 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 34.7 A peak pulse current (IPPM), and 500 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive ECUs and industrial controllers.
For engineers reviewing the SMA5J8.5-E3/61 datasheet, SMA5J8.5-E3/61 pinout, SMA5J8.5-E3/61 application, or SMA5J8.5-E3/61 equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, RoHS-compliant matte tin leads, AEC-Q101 qualification (via HE3 variant), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to clamp transient overvoltages before downstream components are damaged. Its unidirectional configuration requires cathode-band orientation during PCB layout, and it conducts only in reverse-bias mode above VBR.
The SMA5J8.5-E3/61 is rated for non-repetitive 10/1000 µs surges up to 500 W, derated linearly above 25 °C ambient per Fig. 2, and exhibits 80 °C/W junction-to-ambient thermal resistance when mounted on minimum recommended pad layout - critical for sustained surge duty cycles in enclosed enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal DC rail operation. |
| VBR min/max | 9.44 V / 10.4 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 14.4 V at 34.7 A - clamped voltage during full-rated surge; determines maximum stress imposed on protected IC inputs. |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; defines energy absorption capability per transient event. |
| TJ max | +150 °C - maximum allowable junction temperature; constrains thermal design margin under repeated surge conditions. |
| Package | DO-214AC (SMA) - surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with standard SMT reflow profiles. |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, cathode band marking on one end, compliant with UL 94 V-0 flammability rating and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-band side is cathode) | Connected to system ground or lower-potential node in unidirectional TVS configuration. |
| Cathode | Avalanche clamping terminal (marked with band) | Connected to protected line (e.g., 12 V rail); conducts reverse current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; supports high-volume automated assembly. |
| AEC-Q101 qualification (E3 variant base; HE3 fully qualified) | Validates robustness for automotive under-hood applications including engine control and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input. Use Value: Clamps transients to ≤14.4 V, preventing damage to 16 V-rated LDOs and microcontrollers. | Use Scenario: Shielding analog output pins of pressure sensors in factory automation systems from ESD and cable discharge. IC Role / Device Role / Timing Role: Point-of-entry protection on 4–20 mA loop outputs before signal conditioning circuitry. Use Value: Responds in <1 ns to 8 kV contact ESD (IEC 61000-4-2), limiting induced voltage to safe levels for op-amp inputs. |
| DC-DC Converter Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding buck converter inputs in PoE-powered switches exposed to Ethernet-induced surges. IC Role / Device Role / Timing Role: Primary surge limiter upstream of input filter capacitor and controller IC. Use Value: Absorbs 500 W pulses without degradation, maintaining regulation integrity during lightning-induced surges. | Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in smart home hubs. IC Role / Device Role / Timing Role: Back-to-back TVS not used; this unidirectional device applied only where polarity is fixed (e.g., VBUS to GND). Use Value: Low leakage (<1 µA at 8.5 V) avoids standby current drain while providing 14.4 V clamping during hot-plug transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5AHE3/61 | AEC-Q101 qualified; identical electrical specs; HE3 suffix denotes automotive-grade whisker testing (JESD 201 Class 2). | Required for automotive production; supports extended temperature validation and PPAP documentation. | Select when automotive qualification is mandatory; otherwise SMA5J8.5-E3/61 suffices for commercial/industrial use. |
| SMCJ8.5A-E3/73 | Higher PPPM (1500 W); larger DO-214AB (SMC) package; same VWM/VBR/VC values. | Used where higher single-event energy absorption is needed, e.g., outdoor telecom equipment with longer surge duration. | Choose for >500 W surge requirements; verify PCB space and thermal pad layout compatibility. |
Compared with SMA5J8.5AHE3/61, the SMA5J8.5-E3/61 lacks formal AEC-Q101 certification but shares all electrical and mechanical specs; versus SMCJ8.5A-E3/73, it offers footprint savings and lower cost at the expense of peak power rating - making it optimal for space-constrained 500 W-class protection.
Availability
SMA5J8.5-E3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, DC-DC converter inputs, and consumer USB power rail protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMA5J8.5-E3/61 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, TVS devices, and optoelectronics with emphasis on reliability, power density, and automotive-grade performance.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained SMT designs, targeting automotive, industrial, and computing applications where rapid clamping and consistent surge endurance are critical.
FAQ
What is the polarity configuration of the SMA5J8.5-E3/61?
The SMA5J8.5-E3/61 is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the DO-214AC (SMA) package body; the banded end must be connected toward the protected line (e.g., 12 V rail), while the anode connects to ground. This configuration ensures conduction only during reverse overvoltage events, matching standard DC power rail protection topology.
Does the SMA5J8.5-E3/61 meet AEC-Q101 qualification?
The SMA5J8.5-E3/61 is RoHS-compliant and manufactured to commercial-grade specifications. It is not AEC-Q101 qualified; that status applies to the SMA5J8.5AHE3/61 variant (HE3 suffix). For automotive production, specify the HE3 version - the SMA5J8.5-E3/61 remains suitable for industrial and consumer applications where AEC-Q101 is not mandated.
What is the maximum clamping voltage of the SMA5J8.5-E3/61 under rated surge conditions?
The SMA5J8.5-E3/61 has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPPM) of 34.7 A, tested with a 10/1000 µs waveform. This value represents the highest voltage seen across the device during full-rated surge events and directly determines the protection level afforded to downstream components such as regulators or microcontroller I/O pins.
Can the SMA5J8.5-E3/61 be used in bi-directional protection circuits?
No - the SMA5J8.5-E3/61 is strictly unidirectional and lacks symmetrical breakdown behavior. For bi-directional transient suppression (e.g., AC lines or data buses), select the CA-suffixed variant SMA5J8.5CA or equivalent. Using SMA5J8.5-E3/61 in reverse-biased AC applications risks failure due to forward conduction during negative half-cycles.
What is the thermal resistance specification for the SMA5J8.5-E3/61?
The SMA5J8.5-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on the minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. This value assumes no additional heatsinking and is critical for estimating junction temperature rise during repetitive surge events - especially important in enclosed or high-ambient-temperature environments.
SMA5J8.5-E3/61 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-E3/61 FAQ
1.How can I place an order for SMA5J8.5-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5-E3/61 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-E3/61 reliable?
The price and inventory of SMA5J8.5-E3/61 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-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J8.5-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5-E3/61?
SMA5J8.5-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5-E3/61 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-E3/61?
For technical support, including SMA5J8.5-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5-E3/61 requirements.
6.How does Aetrix verify that SMA5J8.5-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J8.5-E3/61?
All SMA5J8.5-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J8.5-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J8.5-E3/61 Tags
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