My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J17-E3/5A
- Part No.:
- SMA5J17-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17-E3/5A.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,287
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J17-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on power and signal lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR), 27.6 V clamping voltage at 18.1 A peak pulse current (IPPM), and 500 W peak pulse power (10/1000 µs waveform). It is widely used to protect MOSFETs and ICs in automotive power supplies against load dump and inductive switching transients.
For engineers reviewing the SMA5J17-E3/5A datasheet, SMA5J17-E3/5A pinout, SMA5J17-E3/5A application, or SMA5J17-E3/5A equivalent, key selection criteria include unidirectional polarity, 150 °C max junction temperature, AEC-Q101 qualification, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by overvoltage events exceeding its reverse standoff threshold. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables effective energy diversion during fast transients (response time <1.0 ns).
The device is rated for 500 W peak pulse power under standardized 10/1000 µs waveform conditions, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), supporting reliable operation in compact PCB layouts with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below breakdown. |
| VBR (min/max) | 18.9 V / 20.9 V - Measured at 1.0 mA test current; ensures predictable turn-on within tight tolerance band. |
| VC @ IPPM | 27.6 V - Clamping voltage at 18.1 A peak pulse current; determines maximum voltage seen by protected circuitry. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); defines survivability against common automotive and industrial surges. |
| IPPM | 18.1 A - Peak pulse current corresponding to VC; used to size series impedance and verify clamp margin. |
| TJ max | 150 °C - Maximum junction temperature; sets thermal derating limits for sustained surge duty cycles. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on standard pad layout; informs heatsinking requirements. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional polarity indicated by cathode band marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), compliant with UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts when transient exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable breakdown voltage and low leakage (<1.0 µA) across temperature and lifetime. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns. |
| Low profile DO-214AC package | Enables high-density PCB layouts and supports automated pick-and-place with industry-standard feeders. |
| Matte tin-plated leads | Meets J-STD-002 and JESD 22-B102 solderability standards; JESD 201 Class 1A whisker resistant. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 17 V. Use Value: Limits peak voltage to ≤27.6 V during 500 W surges, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground, leveraging fast response (<1 ns) to suppress sub-microsecond transients. Use Value: Maintains signal integrity with <1.0 µA leakage at 17 V, avoiding DC offset or loading errors in precision measurement paths. |
| DC-DC Converter Input Stage | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding buck converter inputs against back-EMF from relay coils and motor drivers in embedded power modules. IC Role / Device Role / Timing Role: Primary surge shunt on input capacitor node, absorbing repetitive 10/1000 µs transients up to 18.1 A. Use Value: Withstands ≥1000 surges at rated power due to robust silicon junction and low Rsurge, extending system MTBF. | Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs caused by Miller-induced voltage spikes during switching. IC Role / Device Role / Timing Role: Clamp diode tied between gate and source, activated only during overvoltage excursions beyond 17 V. Use Value: Fast clamping (≤1 ns) limits dv/dt stress on gate dielectric, preserving long-term reliability without affecting normal PWM timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J17AHE3/5A | AEC-Q101 qualified version with identical electrical specs; same DO-214AC package and marking code 5BR. | Required for automotive production where component-level qualification is mandated (e.g., Tier 1 BOMs). | Select SMA5J17AHE3/5A when full AEC-Q101 traceability and extended reliability testing are contractually required. |
| SMC5J17A-E3/57T | Same VWM/VC specs but in larger DO-214AB (SMC) package; higher thermal mass (RθJA = 35 °C/W) and 600 W PPPM. | Better suited for high-repetition-rate surges or elevated ambient temperatures (>85 °C) where DO-214AC thermal limits are exceeded. | Choose SMC5J17A-E3/57T when board space allows and thermal performance must exceed 500 W derated operation. |
Compared with SMA5J17-E3/5A, SMA5J17AHE3/5A adds formal AEC-Q101 certification without electrical change, while SMC5J17A-E3/57T trades footprint for higher surge endurance and lower thermal resistance-enabling longer surge hold times or operation in hotter environments.
Availability
SMA5J17-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC-DC converter designs requiring stable component supply, RoHS compliance, and AEC-Q101-aligned quality assurance.
Supply support for SMA5J17-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 is engineered for high-power-density transient suppression in space-constrained applications, targeting automotive, industrial, and telecom systems where fast response, repeatable clamping, and robust surge handling are critical.
FAQ
What is the polarity configuration of the SMA5J17-E3/5A?
The SMA5J17-E3/5A is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-214AC package. When installed correctly-with the banded end toward the protected line-it blocks 17 V in reverse bias and clamps transients above ~18.9 V. This configuration prevents forward conduction during normal operation while enabling rapid avalanche breakdown during overvoltage events. The SMA5J17-E3/5A does not function as a bidirectional device.
Does the SMA5J17-E3/5A meet automotive qualification standards?
The SMA5J17-E3/5A is RoHS-compliant and manufactured to commercial-grade specifications. While it shares the same silicon die and package as the AEC-Q101-qualified SMA5J17AHE3/5A, the -E3/5A suffix denotes commercial grade without formal AEC-Q101 test documentation. For automotive production, specify SMA5J17AHE3/5A. The SMA5J17-E3/5A remains suitable for non-safety-critical automotive prototyping and industrial applications where qualification is not mandated.
What is the maximum clamping voltage of the SMA5J17-E3/5A under surge conditions?
The SMA5J17-E3/5A has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current of 18.1 A using the standard 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet and represents the highest voltage the protected circuit will experience during a full-power transient event. Designers use this parameter to verify that downstream components-such as LDOs, MCUs, or gate drivers-remain within their absolute maximum ratings during surge conditions.
Can the SMA5J17-E3/5A be used in bidirectional signal line protection?
No, the SMA5J17-E3/5A is strictly unidirectional and unsuitable for bidirectional signal line protection. Bidirectional operation requires symmetrical breakdown in both polarities, which is only provided by CA-suffixed variants like SMA5J17CA. Using SMA5J17-E3/5A on AC-coupled or differential lines risks forward conduction during negative half-cycles, potentially damaging the diode or distorting signals. For bidirectional protection, select SMA5J17CA or equivalent dual-diode configurations.
What is the thermal resistance and recommended pad layout for the SMA5J17-E3/5A?
The SMA5J17-E3/5A 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, as specified in the Vishay datasheet. To achieve this rating, use minimum recommended pad dimensions per the DO-214AC outline drawing, avoid excessive solder mask coverage on thermal pads, and ensure adequate internal copper planes for heat spreading. Exceeding 150 °C junction temperature invalidates surge rating guarantees.
SMA5J17-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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SMA5J17-E3/5A FAQ
1.How can I place an order for SMA5J17-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17-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 SMA5J17-E3/5A reliable?
The price and inventory of SMA5J17-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 SMA5J17-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA5J17-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17-E3/5A?
SMA5J17-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17-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 SMA5J17-E3/5A?
For technical support, including SMA5J17-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17-E3/5A requirements.
6.How does Aetrix verify that SMA5J17-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA5J17-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 SMA5J17-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA5J17-E3/5A?
All SMA5J17-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17-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 SMA5J17-E3/5A part is unused and in its original packaging.
Return procedure for SMA5J17-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J17-E3/5A 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 …
