My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J8.5AHE3/5A
- Part No.:
- SMA5J8.5AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J8.5AHE3/5A.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,174
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J8.5AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on 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 10 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMA5J8.5AHE3/5A datasheet, SMA5J8.5AHE3/5A pinout, SMA5J8.5AHE3/5A application, or SMA5J8.5AHE3/5A equivalent, key selection criteria include verified unidirectional polarity, AEC-Q101 qualification (HE3 suffix), 150 °C max junction temperature, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector with glass-passivated silicon junction and low incremental surge resistance. Its response time is sub-nanosecond, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes on 12 V and 24 V automotive subsystems.
The device is rated for non-repetitive 10 A peak pulse current (IPPM) at 10/1000 µs, derated above 25 °C per Fig. 2, and exhibits 80 °C/W junction-to-ambient thermal resistance when mounted per recommended pad layout. Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before clamping begins; sets safe DC rail margin for 12 V systems. |
| VBR (min/max) | 9.44 V / 10.4 V at 1 mA - ensures reliable turn-on within defined tolerance; critical for predictable clamping threshold. |
| VC @ IPPM | 14.4 V at 10 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - peak pulse power handling capability; defines survivability against standardized surge waveforms. |
| IFSM | 40 A - 8.3 ms half-sine forward surge rating; supports robustness against accidental reverse-bias faults or miswiring. |
| TJ max | 150 °C - maximum junction temperature; enables operation in under-hood automotive environments with thermal margin. |
| Package | SMA (DO-214AC) - surface-mount package with 5.28 mm × 4.50 mm footprint; compatible with J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case meeting UL 94 V-0; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node in unidirectional configuration; carries surge current to ground during clamping. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); reverse voltage triggers avalanche breakdown when VWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives; improves field failure rate in humid environments. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients; ensures tighter clamping window than standard Zener-based protectors. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement in high-volume SMT lines. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 suffix adds halogen-free molding compound - meets EU ELV and OEM sustainability mandates. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 14.4 V. Use Value: Prevents latch-up or permanent damage to downstream PMICs and microcontrollers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on 4–20 mA or 0–10 V signal paths to absorb ESD and cable-coupled noise. Use Value: Maintains signal integrity below 15 V clamping level while adding <1 nF parasitic capacitance to avoid bandwidth degradation. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home hubs and gateways. IC Role / Device Role / Timing Role: Standoff-rated TVS across regulated 5 V or 12 V outputs to block cross-regulator coupling surges. Use Value: Delivers 500 W surge immunity without derating at ambient up to 85 °C - validated per IEC 61000-4-5 Level 4. |
Use Scenario: DC power feed protection in PoE-powered base stations and remote radio units. IC Role / Device Role / Timing Role: Unidirectional clamping device on +48 V DC input to limit transients induced by lightning or grid switching. Use Value: Withstands repeated 10/1000 µs surges up to 10 A while maintaining VC ≤ 14.4 V - ensures uninterrupted operation of RF front-end ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J8.5A-E3/5A | No AEC-Q101 qualification; commercial-grade only; same electrical specs and package. | Suitable for consumer or industrial non-automotive use where automotive reliability not mandated. | Select when cost sensitivity outweighs automotive qualification requirements. |
| SMC5J8.5AHE3/5A | Same VWM, VBR, VC, but in larger SMC (DO-214AB) package; higher IPPM (20 A vs. 10 A) and PPPM (1500 W). | Better suited for higher-energy surge environments (e.g., heavy-duty vehicle chassis rails) requiring greater margin. | Choose when board space allows larger footprint and system-level surge testing exceeds 500 W requirements. |
Compared with SMA5J8.5AHE3/5A, the E3/5A variant lacks AEC-Q101 validation but offers identical clamping performance at lower cost, while the SMC5J8.5AHE3/5A delivers triple the pulse power in a larger package - enabling design scalability without changing circuit topology.
Availability
SMA5J8.5AHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC feeder lines requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for SMA5J8.5AHE3/5A 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, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained automotive and industrial applications, delivering 500 W pulse capability in the compact SMA package with AEC-Q101 validation.
FAQ
What is the clamping voltage of the SMA5J8.5AHE3/5A at its rated peak pulse current?
The SMA5J8.5AHE3/5A 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 under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J8.5AHE3/5A maintains this clamping performance across its full operating temperature range when mounted per Vishay's recommended pad layout.
Is the SMA5J8.5AHE3/5A suitable for automotive applications?
Yes, the SMA5J8.5AHE3/5A is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive reliability standards. The SMA5J8.5AHE3/5A is explicitly intended for under-hood and body electronics where 12 V rail protection against load dump and ISO 7637-2 transients is required.
What does the "/5A" suffix indicate in SMA5J8.5AHE3/5A?
The "/5A" suffix denotes the packaging format: 7500 units per 13-inch diameter plastic tape and reel. This contrasts with "/61", which indicates 1800 units per 7-inch reel. Both formats use the same SMA5J8.5AHE3 device - the suffix affects only logistics and SMT machine feed configuration, not electrical or mechanical characteristics of the SMA5J8.5AHE3/5A itself.
How does the SMA5J8.5AHE3/5A differ from bidirectional TVS diodes like SMA5J8.5CA?
The SMA5J8.5AHE3/5A is unidirectional and features polarity marking (cathode band), whereas SMA5J8.5CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMA5J8.5AHE3/5A is used on DC lines where polarity is fixed, offering slightly tighter VBR tolerance and lower leakage. Bidirectional versions are reserved for AC or floating signal lines.
What is the thermal resistance of the SMA5J8.5AHE3/5A, and how does it affect layout?
The SMA5J8.5AHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surge conditions, PCB layout must replicate this minimum copper area. Reducing pad size increases RθJA, risking thermal runaway during sustained transient activity - a critical consideration for the SMA5J8.5AHE3/5A in high-duty-cycle applications.
SMA5J8.5AHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J8.5AHE3/5A FAQ
1.How can I place an order for SMA5J8.5AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J8.5AHE3/5A 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 SMA5J8.5AHE3/5A reliable?
The price and inventory of SMA5J8.5AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J8.5AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J8.5AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J8.5AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J8.5AHE3/5A?
SMA5J8.5AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J8.5AHE3/5A 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 SMA5J8.5AHE3/5A?
For technical support, including SMA5J8.5AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J8.5AHE3/5A requirements.
6.How does Aetrix verify that SMA5J8.5AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J8.5AHE3/5A 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 SMA5J8.5AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J8.5AHE3/5A?
All SMA5J8.5AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J8.5AHE3/5A, 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 SMA5J8.5AHE3/5A part is unused and in its original packaging.
Return procedure for SMA5J8.5AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J8.5AHE3/5A 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 …
