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Vishay General Semiconductor - Diodes Division SMBJ17AHM3_B/H
- Part No.:
- SMBJ17AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17AHM3_B/H.pdf
- Description:
- 600W,17V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,507
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Product details
Overview
SMBJ17AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 27.6 V maximum clamping voltage (VC) at 21.7 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ17AHM3_B/H datasheet, SMBJ17AHM3_B/H pinout, SMBJ17AHM3_B/H application, or SMBJ17AHM3_B/H equivalent, key selection criteria include unidirectional polarity, 1.0 µA max reverse leakage at VWM, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and thermal resistance of 100 °C/W junction-to-ambient - critical for automotive-grade board-level surge protection design.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by overvoltage events exceeding its reverse stand-off voltage (VWM = 17 V). Its silicon avalanche junction responds in <1 ps, limiting transient energy before downstream components experience damaging voltage excursions.
The SMBJ17AHM3_B/H uses a glass-passivated chip junction housed in an SMB (DO-214AA) thermally optimized package with matte tin-plated leads. It is rated for repetitive 600 W surges (10/1000 µs), derated above 25 °C per Fig. 2, and supports operating junction temperatures from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| 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 IPPM = 21.7 A - Peak voltage seen by protected circuit during worst-case 600 W transient; determines stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Surge energy-handling capability under standardized waveform; validates robustness against IEC 61000-4-5 Level 4 threats. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Low leakage preserves system efficiency and prevents false triggers in high-impedance sensing paths. |
| TJ max | +150 °C - Enables operation in under-hood automotive or industrial environments without thermal shutdown. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-biased in normal operation) | Connected to ground or low-side reference; completes clamping path when transient exceeds VBR. |
| Cathode | Reverse-biased terminal during normal operation | Connected to protected line (e.g., 12 V rail or sensor input); carries surge current into ground via anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated clamping performance against severe lightning-induced surges per IEC 61000-4-5, enabling single-device protection without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Qualified for automotive applications including engine control units and ADAS sensors, with validated reliability across temperature cycling, humidity, and mechanical shock. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for EU and global OEM programs; eliminates brominated flame retardants without compromising thermal or electrical performance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (<1 ns rise time), reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements, lowering manufacturing cost and complexity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-supplied ECUs from load-dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between power rail and chassis ground to shunt surge energy away from PMICs and CAN transceivers. Use Value: Limits rail voltage to ≤27.6 V during 21.7 A surge, preventing overvoltage damage to 3.3 V/5 V logic and analog front-ends. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to motor switching noise. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 4–20 mA loop or 0–10 V output line, referenced to local ground. Use Value: Clamps induced spikes to 27.6 V within <1 ps, preserving signal integrity and avoiding ADC saturation or op-amp latch-up. |
| DC-DC Converter Input Protection | USB Port ESD Suppression |
|
Use Scenario: Secondary-side input protection for isolated 24 V → 5 V buck converters in factory automation controllers. IC Role / Device Role / Timing Role: Primary transient suppressor upstream of input capacitor and controller IC, absorbing energy before filtering stage. Use Value: Handles repetitive 600 W surges without degradation, maintaining stable 5 V output during frequent relay coil de-energization events. |
Use Scenario: Board-level ESD protection on USB 2.0 VBUS line in embedded host devices subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Unidirectional TVS tied between VBUS and ground, activated only during overvoltage events above 17 V. Use Value: 1.0 µA leakage avoids parasitic drain on standby power; 27.6 V clamping prevents USB PHY damage while staying below 30 V absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17AHE3_B/H | Same electrical specs but RoHS-compliant commercial grade (E3), not halogen-free; no AEC-Q101 qualification. | Suitable for non-automotive industrial or consumer applications where halogen-free and automotive qualification are not mandated. | Select SMBJ17AHE3_B/H for cost-sensitive commercial designs without automotive compliance requirements. |
| SMAJ17A-HF | Lower 400 W PPPM rating; SMA (DO-214AC) package with smaller 4.5 mm × 2.7 mm footprint and higher RθJA (140 °C/W). | Acceptable for lower-energy transients or space-constrained layouts where thermal margin allows reduced power handling. | Choose SMAJ17A-HF only if board layout restricts SMB footprint and surge threat level is limited to IEC 61000-4-2/4-4. |
Compared with SMBJ17AHM3_B/H, SMBJ17AHE3_B/H offers identical clamping performance without halogen-free or AEC-Q101 assurance, while SMAJ17A-HF trades 33 % lower surge power and inferior thermal performance for 30 % smaller PCB area - making SMBJ17AHM3_B/H optimal for automotive and high-reliability industrial use cases demanding full 600 W capability and qualification traceability.
Availability
SMBJ17AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and DC-DC converter designs requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMBJ17AHM3_B/H 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 efficiency, and automotive-grade qualification.
The SMBJ series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and long-term stability are essential.
FAQ
What is the clamping voltage of SMBJ17AHM3_B/H at its rated peak pulse current?
The SMBJ17AHM3_B/H has a maximum clamping voltage (VC) of 27.6 V at its specified peak pulse current (IPPM) of 21.7 A, measured using the standardized 10/1000 µs waveform. This value represents the highest voltage the protected circuit will experience during a full 600 W transient event, ensuring compatibility with 3.3 V, 5 V, and 12 V system components. The SMBJ17AHM3_B/H maintains this clamping performance across its qualified operating temperature range.
Is SMBJ17AHM3_B/H suitable for automotive applications?
Yes, SMBJ17AHM3_B/H is AEC-Q101 qualified and designated with the HM3 suffix, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor modules. Its halogen-free, RoHS-compliant construction, MSL Level 1 reflow rating, and guaranteed operation from –55 °C to +150 °C junction temperature meet stringent OEM requirements. The SMBJ17AHM3_B/H is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
How does the HM3 suffix differ from the HE3 suffix in SMBJ17A variants?
The HM3 suffix on SMBJ17AHM3_B/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas the HE3 suffix denotes RoHS-compliance and AEC-Q101 qualification but not halogen-free material content. Both share identical electrical specifications and SMB package dimensions, but HM3 meets additional environmental mandates required by certain Tier 1 automotive suppliers. The SMBJ17AHM3_B/H therefore satisfies stricter sustainability and regulatory requirements than SMBJ17AHE3_B/H.
What is the reverse leakage current specification for SMBJ17AHM3_B/H at its stand-off voltage?
The SMBJ17AHM3_B/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 17 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss in always-on circuits and avoids interference with high-impedance sensor inputs or precision voltage references. The SMBJ17AHM3_B/H maintains leakage below 10 µA up to 80 % of VWM across its full operating temperature range.
Can SMBJ17AHM3_B/H be used in bidirectional transient protection circuits?
No, SMBJ17AHM3_B/H is a unidirectional TVS diode, identifiable by its cathode band marking and specified parameters (e.g., VBR, VC) for reverse-biased operation only. For bidirectional protection, Vishay offers the SMBJ17CA variant, which provides symmetrical clamping in both polarities. Using SMBJ17AHM3_B/H in a bidirectional configuration would result in forward conduction and potential failure during negative transients. Always match polarity to circuit topology - SMBJ17AHM3_B/H is intended for DC rails or signals with defined polarity.
SMBJ17AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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)
SMBJ17AHM3_B/H FAQ
1.How can I place an order for SMBJ17AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17AHM3_B/H 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 SMBJ17AHM3_B/H reliable?
The price and inventory of SMBJ17AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ17AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17AHM3_B/H?
SMBJ17AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17AHM3_B/H 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 SMBJ17AHM3_B/H?
For technical support, including SMBJ17AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ17AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ17AHM3_B/H 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 SMBJ17AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ17AHM3_B/H?
All SMBJ17AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17AHM3_B/H, 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 SMBJ17AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ17AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17AHM3_B/H Tags
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