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Vishay General Semiconductor - Diodes Division SMBJ17AHM3/H
- Part No.:
- SMBJ17AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17AHM3/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
SMBJ17AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 17 V standoff 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, and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ17AHM3/H datasheet, SMBJ17AHM3/H pinout, SMBJ17AHM3/H application, or SMBJ17AHM3/H equivalent, this device is selected for robust overvoltage protection in DC power rails, I/O interfaces, and sensor signal lines where fast response (<1 ps), low clamping ratio, and AEC-Q101 qualification are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging a glass-passivated silicon junction to deliver sub-nanosecond response to transient events. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = 150 °C) support reliable operation under repetitive surge conditions when mounted on standard 0.2" × 0.2" copper pads.
The SMBJ17AHM3/H is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive applications, and rated for 100 A non-repetitive forward surge current (IFSM) - enabling use in 12 V and 24 V vehicle subsystems without derating concerns at ambient temperatures up to 85 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12 V systems. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Tight tolerance ensures predictable turn-on during transients; supports precise overvoltage threshold design. |
| VC (Clamping Voltage) | 27.6 V at 21.7 A - Limits downstream voltage stress during 600 W surge; clamping ratio (VC/VWM) = 1.62 enables effective IC-level protection. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Sustains high-energy transients per IEC 61000-4-5 Level 4 without degradation. |
| IPPM (Peak Pulse Current) | 21.7 A - Validated surge current handling capacity under standardized test conditions; enables direct comparison across TVS families. |
| TJ max. | 150 °C - Enables operation in under-hood automotive environments and industrial enclosures without thermal shutdown. |
| Package | SMB (DO-214AA) - Industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 5.59 mm × 4.06 mm × 2.20 mm (L × W × H); matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms clamping loop with cathode during reverse-biased transient events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V rail or sensor output); marked by band; conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for engine control, ADAS, and body electronics. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (4 kV/2 Ω) without failure; eliminates need for external series impedance in many 12 V designs. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20 MSL level 1 - supports lead-free reflow profiles up to 260 °C peak. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), reducing risk of latch-up in downstream CMOS ICs. |
| Fast response time | Sub-nanosecond junction response enables clamping before transient energy couples into protected circuitry - critical for high-speed sensor interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power input and bulk capacitor; absorbs >95 % of surge energy before it reaches LDOs or microcontrollers. Use Value: Prevents permanent damage to 3.3 V/5 V logic from 120 V/50 ms load dump pulses; validated per ISO 7637-2 Pulse 5a. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Point-of-entry protection on 4–20 mA or 0–10 V signal lines; placed upstream of op-amp input stages. Use Value: Maintains signal integrity below ±0.1 % full-scale error after 8 kV contact ESD (IEC 61000-4-2); avoids recalibration or downtime. |
| Telecom DC Power Input Protection | Consumer USB-C Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC input derived from Ethernet cables. IC Role / Device Role / Timing Role: Primary overvoltage clamp on primary-side DC bus; coordinated with secondary-side TVS for cascaded protection. Use Value: Limits bus voltage to <30 V during 1 kV/500 Ω surge (IEC 61000-4-5), preventing MOSFET gate oxide rupture and controller latch-up. | Use Scenario: Adding transient immunity to USB-C receptacles in portable monitors and docking stations exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line; placed adjacent to connector to minimize trace inductance. Use Value: Clamps 15 kV air discharge (IEC 61000-4-2) to <25 V within 1 ns - preserves USB PD negotiation integrity and prevents port disablement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17AHE3/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; identical electrical specs and SMB package. | Suitable for commercial/industrial use only; not approved for automotive production. | Select when halogen-free content or automotive qualification is not required; lower cost alternative for non-automotive BOMs. |
| SMAJ17A-HM3 | Lower peak pulse power (400 W vs. 600 W); same VWM, VBR, and VC; SMA (DO-214AC) package with smaller footprint (4.57 mm × 2.69 mm). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge. | Choose for space-constrained PCBs where surge threat level is limited to ESD and local switching noise. |
Compared with SMBJ17AHE3/H and SMAJ17A-HM3, the SMBJ17AHM3/H uniquely combines 600 W surge capability, halogen-free construction, and AEC-Q101 qualification - making it the only option among the three qualified for automotive power rail protection requiring long-term reliability under thermal cycling and humidity stress.
Availability
SMBJ17AHM3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom DC input, and consumer USB-C port protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ17AHM3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What is the clamping voltage of SMBJ17AHM3/H at its rated peak pulse current?
The SMBJ17AHM3/H has a maximum clamping voltage (VC) of 27.6 V at 21.7 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 27.6 V during a 600 W transient event. The SMBJ17AHM3/H maintains this clamping performance across its full operating temperature range (−55 °C to +150 °C), ensuring consistent protection in automotive under-hood locations.
Is SMBJ17AHM3/H suitable for automotive applications?
Yes, SMBJ17AHM3/H is AEC-Q101 qualified and specifically designed for automotive use. Its HM3 suffix denotes halogen-free, RoHS-compliant construction and full qualification to AEC-Q101 stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The SMBJ17AHM3/H is deployed in engine control units, body control modules, and ADAS camera power supplies where sustained reliability under thermal and mechanical stress is mandatory.
How does the SMBJ17AHM3/H differ from the SMBJ17A-E3/H variant?
The SMBJ17AHM3/H differs from SMBJ17A-E3/H in three key aspects: it is halogen-free (HM3 vs. E3), qualified to AEC-Q101 (whereas E3 is commercial-grade only), and rated for higher moisture sensitivity level (MSL level 1 at 260 °C peak). Electrically, both share identical VWM, VBR, VC, and PPPM. The SMBJ17AHM3/H is specified for automotive production, while SMBJ17A-E3/H targets cost-sensitive commercial applications without qualification requirements.
What is the thermal resistance of SMBJ17AHM3/H, and how does it affect layout?
The SMBJ17AHM3/H 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. This value assumes minimum recommended pad layout per Vishay's datasheet Figure 6. To maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - the SMBJ17AHM3/H requires at least two 5 mm² thermal pads connected via multiple vias to inner ground planes for high-reliability automotive use.
Can SMBJ17AHM3/H be used in bidirectional protection circuits?
No, SMBJ17AHM3/H is a unidirectional TVS diode and must not be used for bidirectional transient suppression. Its cathode band marking and asymmetric IV curve mean it conducts only during reverse-biased overvoltage events. For bidirectional protection (e.g., AC lines or differential data buses), Vishay specifies parts with "CA" suffix such as SMBJ17CA. Using SMBJ17AHM3/H in place of a bidirectional device leaves the circuit vulnerable to positive-going transients on the anode side, risking catastrophic failure.
SMBJ17AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMBJ17AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17AHM3/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/H reliable?
The price and inventory of SMBJ17AHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMBJ17AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17AHM3/H?
SMBJ17AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17AHM3/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/H?
For technical support, including SMBJ17AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17AHM3/H requirements.
6.How does Aetrix verify that SMBJ17AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ17AHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMBJ17AHM3/H?
All SMBJ17AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17AHM3/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/H part is unused and in its original packaging.
Return procedure for SMBJ17AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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