My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J18AHE3/61
- Part No.:
- SMA5J18AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J18AHE3/61.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,791
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J18AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 29.2 V clamping voltage at 17.1 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power rails.
For engineers reviewing the SMA5J18AHE3/61 datasheet, SMA5J18AHE3/61 pinout, SMA5J18AHE3/61 application, or SMA5J18AHE3/61 equivalent, key selection criteria include clamping performance under 17.1 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche behavior and low incremental surge resistance. Its response time is sub-nanosecond, enabling effective suppression of fast transients from inductive switching or ESD events.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR min/max | 20.0 V / 22.1 V at 1 mA - verified avalanche onset range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 29.2 V at 17.1 A - clamped voltage seen by protected circuit during full-rated 500 W surge; critical for downstream IC survivability. |
| PPPM | 500 W - peak pulse power handling with 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 80 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; determines derating above 25 °C ambient. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with UL 94 V-0 flammability rating. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line ground or low-side return path. | Provides low-impedance path to ground during reverse surge; must be routed with minimal inductance to maintain clamping efficacy. |
| Cathode | Current exit terminal in forward bias; marked with black band; connects to protected line input or supply rail. | Defines polarity-sensitive connection - reversal causes catastrophic failure under normal operating voltage. |
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 infotainment modules. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and lifetime - critical for safety-critical systems. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V/5 V logic and MOSFET gate drivers. |
| MSL Level 1 compliance | Enables single-reflow assembly without moisture sensitivity concerns - eliminates bake requirements and streamlines SMT production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V battery-fed microcontroller power input in body control module exposed to load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing up to 500 W surge energy while limiting rail voltage to ≤29.2 V. Use Value: Prevents MCU brownout or latch-up during 120 V/50 ms transients; AEC-Q101 qualification ensures field reliability over 15-year vehicle life. |
Use Scenario: Analog output line (0–10 V) from pressure sensor in PLC I/O module subjected to cable-induced EFT bursts. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed at connector entry point to shunt transient energy before reaching ADC front-end. Use Value: Limits induced spike to <30 V, preserving 12-bit measurement integrity and avoiding op-amp saturation or damage. |
| DC-DC Converter Input Stage | Telecom PoE Data Line Surge Guard |
Use Scenario: 24 V input to isolated buck converter in factory automation drive receiving switching noise from adjacent VFDs. IC Role / Device Role / Timing Role: Primary overvoltage protector upstream of input filter capacitor and controller IC. Use Value: Clamps repetitive 40 A surges (IFSM = 40 A) without degradation; RθJL = 25 °C/W enables thermal coupling to heatsink pad. |
Use Scenario: Ethernet data pair (10/100BASE-T) carrying PoE+ (IEEE 802.3at) in outdoor security camera node. IC Role / Device Role / Timing Role: Unidirectional TVS on each data line referenced to local ground, coordinated with common-mode choke. Use Value: Withstands 10/1000 µs surges up to 500 W while maintaining <1 pF junction capacitance at VWM - no signal integrity impact at 100 MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J18A-E3/61 | Commercial-grade version; not AEC-Q101 qualified; identical electrical specs and package. | Lacks automotive qualification; suitable for consumer, telecom, and non-safety industrial use only. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SMC5J18AHE3/61 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package; higher IFSM (100 A vs. 40 A); RθJA = 40 °C/W. | Better thermal performance and surge endurance; requires larger PCB footprint and different pad layout. | Choose for high-reliability 24 V systems needing >40 A surge margin or extended thermal headroom. |
Compared with SMA5J18AHE3/61, the E3/61 variant trades automotive qualification for lower cost in non-automotive settings, while the SMC5J18AHE3/61 offers superior thermal and surge capability at the expense of board space - both require explicit validation of mechanical fit and layout compatibility.
Availability
SMA5J18AHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC power rail protection requiring stable component supply across multi-year production cycles.
Supply support for SMA5J18AHE3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMA5J series is engineered for high-power-density transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping are mandatory.
FAQ
What is the clamping voltage of the SMA5J18AHE3/61 under full-rated surge conditions?
The SMA5J18AHE3/61 clamps to 29.2 V at its peak pulse current of 17.1 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024. The clamping voltage directly determines the maximum stress imposed on downstream components during surge events, making it a critical parameter for system-level protection design using the SMA5J18AHE3/61.
Is the SMA5J18AHE3/61 qualified for automotive applications?
Yes, the SMA5J18AHE3/61 is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number and confirmed in the Vishay datasheet. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its suitability for under-hood and cabin electronics. Engineers specifying the SMA5J18AHE3/61 for automotive designs can rely on its documented qualification status without additional screening.
What is the maximum operating temperature for the SMA5J18AHE3/61?
The SMA5J18AHE3/61 has a maximum junction temperature (TJ max) of +150 °C, with an operating junction and storage temperature range of -55 °C to +150 °C. This rating is specified in the Vishay datasheet and enables deployment in demanding environments such as engine control units and industrial motor drives. Thermal design must account for RθJA = 80 °C/W when mounted on 0.2" × 0.2" copper pads to ensure the SMA5J18AHE3/61 remains within this limit.
How does the SMA5J18AHE3/61 differ from the SMA5J18A-E3/61?
The SMA5J18AHE3/61 and SMA5J18A-E3/61 share identical electrical characteristics (VWM = 18 V, VBR = 20.0–22.1 V, VC = 29.2 V) and SMA (DO-214AC) package, but differ in qualification: HE3 denotes AEC-Q101 qualification, while E3 is commercial grade only. The SMA5J18AHE3/61 is intended for automotive and high-reliability industrial use, whereas the SMA5J18A-E3/61 serves cost-sensitive non-automotive applications - a distinction critical when selecting the correct variant of SMA5J18AHE3/61.
What is the surge current rating of the SMA5J18AHE3/61?
The SMA5J18AHE3/61 has a peak pulse current (IPPM) rating of 17.1 A with a 10/1000 µs waveform and a non-repetitive forward surge current (IFSM) rating of 40 A for 8.3 ms half-sine wave. These values are measured under standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and define the device's ability to absorb transient energy without failure. Designers must verify layout and thermal path to sustain these ratings in actual SMA5J18AHE3/61 implementations.
SMA5J18AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 17.1A
- 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)
SMA5J18AHE3/61 FAQ
1.How can I place an order for SMA5J18AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J18AHE3/61 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 SMA5J18AHE3/61 reliable?
The price and inventory of SMA5J18AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J18AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J18AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J18AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J18AHE3/61?
SMA5J18AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J18AHE3/61 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 SMA5J18AHE3/61?
For technical support, including SMA5J18AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J18AHE3/61 requirements.
6.How does Aetrix verify that SMA5J18AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J18AHE3/61 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 SMA5J18AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J18AHE3/61?
All SMA5J18AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J18AHE3/61, 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 SMA5J18AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J18AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J18AHE3/61 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 …
