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Vishay General Semiconductor - Diodes Division SMBG17A-E3/5B
- Part No.:
- SMBG17A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG17A-E3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG17A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 27.6 V at 21.7 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG17A-E3/5B datasheet, SMBG17A-E3/5B pinout, SMBG17A-E3/5B application, or SMBG17A-E3/5B equivalent, this device is selected for high-energy surge suppression in DC power rails, automotive sensor interfaces, and industrial I/O protection where low clamping ratio, fast response (<1 ns), and stable junction temperature up to +150 °C are critical.
Technical Context
The SMBG17A-E3/5B operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transients induced by inductive switching and ESD events. Its 10/1000 µs waveform rating reflects standardized surge immunity testing per ANSI/IEEE C62.35, and its MSL Level 1 moisture sensitivity ensures compatibility with standard reflow profiles up to 260 °C peak.
It exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on 5.0 mm × 5.0 mm copper pads and supports repetitive surge duty cycles up to 0.01 %. The cathode band marking identifies polarity, and its DO-215AA (SMBG) package enables automated placement while maintaining low incremental surge resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V automotive or 15 V industrial systems. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 27.6 V at 21.7 A - Clamped voltage under 600 W surge; delivers 1.62× VWM clamping ratio for effective downstream IC protection. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| IFSM | 100 A - Non-repetitive forward surge current (8.3 ms half-sine); supports high-energy load dump events in automotive power networks. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic modules per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leaded case with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side return path | Completes clamping loop during transient; must be routed with low-inductance trace to minimize voltage overshoot. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 12 V rail or signal line) | Marked by visible band; determines unidirectional polarity-reverse connection disables protection function. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity standards for industrial and automotive equipment without external series impedance. |
| Low clamping voltage (27.6 V @ 21.7 A) | Provides tight voltage limiting to protect 24 V-rated MOSFETs and microcontrollers against destructive overvoltage during load dump or inductive kick. |
| Glass-passivated junction | Ensures long-term stability of breakdown characteristics and resistance to humidity-induced parameter drift in harsh environments. |
| AEC-Q101 qualification | Validates reliability for automotive applications including body control modules, ADAS sensors, and infotainment power supplies. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without baking or special handling, reducing manufacturing cost and yield risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump surges (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping spikes within nanoseconds. Use Value: Limits voltage to ≤27.6 V during 21.7 A surge, preventing damage to LDO regulators and CAN transceivers downstream. | 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 on signal line, grounded at PCB edge to shunt transients before reaching ADC input. Use Value: Sub-1 ns response time and <1 µA leakage at 17 V preserve signal integrity and measurement accuracy in 16-bit sensor systems. |
| DC Motor Drive Flyback Suppression | Telecom Power Supply Input Protection |
Use Scenario: Absorbing inductive kickback from brushed DC motors in robotics and HVAC actuators. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge supply rail to clamp flyback energy. Use Value: 100 A single-pulse surge rating handles repeated commutation spikes without degradation, extending system lifetime. | Use Scenario: Safeguarding AC/DC front-end rectifiers and PFC stages against lightning-induced surges on telecom base station power inputs. IC Role / Device Role / Timing Role: Primary-level TVS on bulk DC bus, coordinated with MOVs for staged clamping. Use Value: 600 W rating and 20 °C/W junction-to-lead thermal resistance enable reliable heat dissipation during multi-event surge sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A-E3/5B | Same VWM (17 V), identical DO-214AA package, but lower PPPM = 600 W (same rating), slightly higher VC = 27.7 V | Functionally interchangeable in most 12–24 V systems; differs only in JEDEC package outline (DO-214AA vs. DO-215AA) | Select SMBJ17A-E3/5B if board layout uses standard SMB footprint and no rework is needed for lead pitch. |
| 1.5SMC17A | Same electrical specs (VWM, VBR, VC, PPPM), but larger SMC (DO-214AB) package with higher thermal mass and RθJA = 60 °C/W | Better suited for high-temperature ambient (>105 °C) or high-duty-cycle surge environments due to superior thermal performance | Choose 1.5SMC17A when thermal derating margins are constrained and PCB space allows larger footprint. |
Compared with SMBJ17A-E3/5B and 1.5SMC17A, the SMBG17A-E3/5B offers identical surge capability in a lower-profile DO-215AA package with tighter lead pitch, enabling higher-density layouts and improved high-frequency transient response due to reduced parasitic inductance.
Availability
SMBG17A-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and DC motor drive circuits requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for SMBG17A-E3/5B 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, precision, and application-specific optimization.
The SMBG series is engineered for high-power transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and telecom systems where robustness and repeatability under surge stress are mandatory.
FAQ
What is the maximum clamping voltage of the SMBG17A-E3/5B under rated surge conditions?
The SMBG17A-E3/5B has a maximum clamping voltage (VC) of 27.6 V at 21.7 A peak pulse current (IPPM) with 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 SMBG17A-E3/5B maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is the SMBG17A-E3/5B suitable for automotive applications?
Yes, the SMBG17A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use in engine control units, body electronics, and ADAS sensor modules. Its glass-passivated junction, MSL Level 1 rating, and validated performance under load dump (ISO 7637-2 Pulse 5a) and ESD (IEC 61000-4-2) make it appropriate for under-hood and cabin environments. The SMBG17A-E3/5B meets all required stress tests including HTGB, HTRB, and temperature cycling.
What is the package type and lead finish of the SMBG17A-E3/5B?
The SMBG17A-E3/5B uses the SMBG (DO-215AA) surface-mount package with gull-wing leads and matte tin plating, compliant with J-STD-002 and JESD 22-B102 solderability standards. The "E3" suffix indicates RoHS-compliant, industrial-grade construction, and the "5B" denotes 13-inch tape-and-reel packaging with 3200 units per reel. The SMBG17A-E3/5B's compact 4.57 mm × 3.94 mm footprint supports high-density PCB layouts.
How does the SMBG17A-E3/5B differ from bidirectional TVS diodes like SMBG17CA?
The SMBG17A-E3/5B is unidirectional and conducts only in reverse bias above VBR, with polarity marked by a cathode band. In contrast, SMBG17CA is bidirectional and symmetrically clamps both positive and negative transients. The SMBG17A-E3/5B offers lower leakage (<1 µA at 17 V) and supports forward surge current (100 A), making it ideal for DC power rail protection. The SMBG17A-E3/5B cannot replace SMBG17CA in AC-coupled or differential signal paths without circuit redesign.
What is the thermal resistance and recommended pad layout for optimal SMBG17A-E3/5B performance?
The SMBG17A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °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 rated 600 W pulse power, use minimum recommended pad dimensions and ensure adequate copper area and via stitching to internal ground planes. The SMBG17A-E3/5B's junction-to-lead resistance (RθJL) is 20 °C/W, supporting efficient heat transfer to PCB traces.
SMBG17A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBG)
SMBG17A-E3/5B FAQ
1.How can I place an order for SMBG17A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG17A-E3/5B 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 SMBG17A-E3/5B reliable?
The price and inventory of SMBG17A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG17A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG17A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG17A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG17A-E3/5B?
SMBG17A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG17A-E3/5B 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 SMBG17A-E3/5B?
For technical support, including SMBG17A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG17A-E3/5B requirements.
6.How does Aetrix verify that SMBG17A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG17A-E3/5B 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 SMBG17A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG17A-E3/5B?
All SMBG17A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG17A-E3/5B, 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 SMBG17A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG17A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG17A-E3/5B Tags
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