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Vishay General Semiconductor - Diodes Division SMBJ17AHE3_B/I
- Part No.:
- SMBJ17AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17AHE3_B/I.pdf
- Description:
- 600W,17V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,092
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Product details
Overview
SMBJ17AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), and clamps transients to ≤27.6 V at 21.7 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed on power rails and signal lines of industrial sensors and automotive ECUs.
For engineers reviewing the SMBJ17AHE3_B/I datasheet, SMBJ17AHE3_B/I pinout, SMBJ17AHE3_B/I application, or SMBJ17AHE3_B/I equivalent, this AEC-Q101 qualified TVS offers verified 600 W peak pulse power, low clamping ratio (VC/VBR ≈ 1.38), and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection in harsh environments.
Technical Context
This unidirectional TVS operates as a fast-acting shunt clamp: when reverse voltage exceeds VWM = 17 V, it avalanches into low-impedance conduction within <1 ps, diverting surge energy away from downstream ICs. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and repeatable breakdown behavior across temperature (-55 °C to +150 °C).
The device delivers 600 W peak pulse power (10/1000 µs) with 21.7 A IPPM, 27.6 V clamping voltage (VC), and 0.090 %/°C VBR temperature coefficient - enabling predictable coordination with upstream fuses and downstream MOSFET gate drivers in 12 V/24 V automotive and industrial power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before clamping begins; sets protection threshold for 12 V nominal systems. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC (Clamping Voltage) | ≤27.6 V at 21.7 A - Maximum voltage seen by protected circuit during 600 W surge; enables safe operation of 3.3 V/5 V logic interfaces. |
| IPPM (Peak Pulse Current) | 21.7 A (10/1000 µs) - Surge current handling capacity; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance with margin. |
| PPPM (Peak Pulse Power) | 600 W - Transient energy dissipation capability; sustains repetitive surges at 0.01 % duty cycle without degradation. |
| TJmax | +150 °C - Maximum junction temperature; supports under-hood automotive placement with standard PCB copper thermal relief. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.21 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode band marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, rated MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference node | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode (banded end) | Protected line input | Connected to line being protected (e.g., 12 V rail, CAN_H); conducts avalanche current to anode when Vreverse > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated ISO 7637-2 pulse 1/2/5a surges without parameter shift or failure. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes stress on downstream components by limiting clamped voltage to just 38 % above breakdown. |
| MSL Level 1 rating | Enables standard SMT reflow without baking; eliminates moisture-related popcorning risk. |
| Glass-passivated junction | Ensures stable leakage (<1 µA at VWM) and long-term reliability in humid or thermally cycled environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of engine control units (ECUs) against load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed directly at ECU power entry point, triggered within picoseconds to limit voltage to ≤27.6 V. Use Value: Prevents damage to MCU power domains and analog front-ends during 120 V/50 ms load dump events. |
Use Scenario: Safeguarding RS-485/RS-232 communication lines in factory automation PLCs exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional clamp on data line (e.g., TX+), referenced to local ground, suppressing ±2 kV ESD per IEC 61000-4-2. Use Value: Maintains signal integrity and prevents latch-up in transceivers while adding <0.5 pF capacitance. |
| Consumer Device DC Input Protection | Telecom Power Interface Protection |
|
Use Scenario: Securing 5 V/9 V USB-C PD adapter outputs against accidental overvoltage and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 17 V) placed after buck converter output, clamping overshoots exceeding 20.9 V. Use Value: Enables fail-safe shutdown of downstream PMICs without requiring additional crowbar circuitry. |
Use Scenario: Protecting PoE (Power over Ethernet) midspan injectors' 48 V DC output ports from lightning-induced surges. IC Role / Device Role / Timing Role: Primary-stage TVS on PSE output, coordinated with gas discharge tube (GDT) for staged surge diversion. Use Value: Limits let-through voltage to <30 V during 10/1000 µs surges, preserving IEEE 802.3af/at compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17AHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1 specs). | Choose SMBJ17AHM3_B/I when halogen-free bill-of-materials is required; otherwise SMBJ17AHE3_B/I suffices. |
| SMAJ17AHE3/A | Same VWM/VBR/VC specs but in smaller SMA (DO-214AC) package; lower IPPM (14.3 A) and PPPM (400 W). | Limited to lower-energy threats (e.g., IEC 61000-4-2 ESD only); unsuitable for ISO 7637-2 load dump. | Select SMAJ17AHE3/A only for space-constrained consumer designs with <400 W surge requirements. |
Compared with SMBJ17AHE3_B/I, the HM3 variant adds halogen-free compliance without performance trade-offs, while the SMAJ17AHE3/A reduces surge capability by 33 % and requires layout revision due to smaller footprint - making SMBJ17AHE3_B/I optimal for automotive-grade 600 W protection.
Availability
SMBJ17AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power interfaces, and consumer DC input protection requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ17AHE3_B/I 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 and automotive qualification.
The SMBJ series was engineered for high-energy transient suppression in demanding environments - targeting automotive, industrial, and telecom applications where consistent clamping and long-term stability are non-negotiable.
FAQ
What is the maximum clamping voltage of SMBJ17AHE3_B/I at its rated peak pulse current?
The SMBJ17AHE3_B/I has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPPM) of 21.7 A under the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuits will not experience voltages exceeding 27.6 V during a full 600 W transient event - a critical parameter for ensuring compatibility with 3.3 V and 5 V logic interfaces downstream of SMBJ17AHE3_B/I.
Is SMBJ17AHE3_B/I suitable for automotive applications?
Yes, SMBJ17AHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use in Vishay's ordering nomenclature (HE3 suffix). It meets stringent requirements for temperature cycling (-55 °C to +150 °C), humidity resistance, and surge robustness - validated for engine control units, body control modules, and ADAS sensor power rails. The "HE3" suffix confirms its automotive-grade qualification status, distinguishing it from commercial-only variants.
What does the "B/I" suffix mean in SMBJ17AHE3_B/I?
The "B/I" suffix in SMBJ17AHE3_B/I indicates packaging and reel configuration: "B" denotes the revision level (Revision B per Vishay document 88392), and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 3200 units per reel. This format supports high-volume SMT assembly and is traceable to Vishay's preferred ordering code SMBJ17AHE3_B/I - distinct from the 7-inch reel version (SMBJ17AHE3_B/H) containing 750 units.
How does SMBJ17AHE3_B/I differ from bidirectional TVS diodes like SMBJ17CA?
SMBJ17AHE3_B/I is unidirectional and features a cathode band for polarity-sensitive placement, while SMBJ17CA is bidirectional with no polarity marking and symmetric clamping in both directions. The unidirectional SMBJ17AHE3_B/I provides lower leakage (<1 µA at 17 V) and higher surge current capability in DC-biased applications - ideal for protecting positive power rails. In contrast, SMBJ17CA suits AC-coupled or floating signal lines where voltage polarity reverses.
What is the thermal resistance of SMBJ17AHE3_B/I, and how does it affect PCB layout?
SMBJ17AHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe operation under repetitive surges, PCB layout must provide minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - as specified in Vishay's datasheet Figure 2. Insufficient copper area raises junction temperature, degrading clamping performance and shortening lifetime, especially in enclosed automotive enclosures.
SMBJ17AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ17AHE3_B/I FAQ
1.How can I place an order for SMBJ17AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17AHE3_B/I 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 SMBJ17AHE3_B/I reliable?
The price and inventory of SMBJ17AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ17AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17AHE3_B/I?
SMBJ17AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17AHE3_B/I 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 SMBJ17AHE3_B/I?
For technical support, including SMBJ17AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ17AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ17AHE3_B/I 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 SMBJ17AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ17AHE3_B/I?
All SMBJ17AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17AHE3_B/I, 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 SMBJ17AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ17AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17AHE3_B/I Tags
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