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Vishay General Semiconductor - Diodes Division SMBJ17AHM3_A/H
- Part No.:
- SMBJ17AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17AHM3_A/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,401
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Product details
Overview
SMBJ17AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in 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, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive control modules.
For engineers reviewing the SMBJ17AHM3_A/H datasheet, SMBJ17AHM3_A/H pinout, SMBJ17AHM3_A/H application, or SMBJ17AHM3_A/H equivalent, this page delivers verified electrical specs, thermal derating behavior, clamping performance under surge conditions, AEC-Q101 qualification status, and direct alternatives for circuit protection design-in.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, responding within <1 ps to transient overvoltages and limiting reverse voltage across protected components. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at 17 V), while the SMB package supports automated SMT placement and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
The device is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive applications, and rated for continuous operation from –55 °C to +150 °C junction temperature. Thermal resistance is 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable power dissipation up to 5.0 W at 50 °C ambient when mounted on recommended 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on during transients without premature leakage. |
| VC (Clamping Voltage) | 27.6 V at 21.7 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables robust 12 V rail protection. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when properly mounted. |
| IPPM (Peak Pulse Current) | 21.7 A - Maximum non-repetitive surge current capability; determines minimum trace width and PCB copper area required. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Leakage (ID) | ≤1.0 µA at 17 V - Minimizes standby power loss and avoids false triggering in low-current sensor bias networks. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-band marked end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms return path during clamping event. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 12 V supply rail or CAN_H); absorbs positive-going surges toward ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance - suitable for engine control units and ADAS power rails. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when paired with appropriate series impedance, protecting downstream DC-DC converters. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs - critical for 24 V systems where headroom above nominal rail is limited. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports green manufacturing and export compliance. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces production overhead in high-volume SMT lines. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 16750-2) and alternator ripple-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping positive surges above 17 V. Use Value: Limits peak voltage to ≤27.6 V during 21.7 A transients, preventing damage to LDOs and microcontrollers without adding series resistance. |
Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors from ESD (IEC 61000-4-2 ±8 kV contact) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line (e.g., 4–20 mA loop or RS-485 bus), grounded at system earth. Use Value: Sub-1 µA leakage preserves sensor offset accuracy; fast response prevents latch-up in precision op-amps. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches from lightning-induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter, sized for 600 W pulse handling. Use Value: Withstands repetitive 10/1000 µs surges at 0.01% duty cycle - extends field lifetime in outdoor telecom cabinets. |
Use Scenario: Adding secondary-level surge immunity to USB Type-A power pins in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, cathode to VBUS, anode to ground. Use Value: 27.6 V clamping prevents overvoltage on USB PD controllers while maintaining <1 µA quiescent leakage for battery-backed designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17AHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3); no AEC-Q101 qualification. | Restricted to commercial-grade industrial and consumer applications; not approved for automotive under-hood use. | Select when halogen-free requirement or AEC-Q101 validation is not mandated; lower cost alternative for non-automotive BOMs. |
| SMAJ17A-HF | Same VWM/VC ratings but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 or load dump. | Choose only for space-constrained consumer PCBs with verified low-surge environments; avoid in automotive or industrial power entry. |
Compared with SMBJ17AHM3_A/H, the SMBJ17AHE3_A/H offers identical clamping performance without halogen-free or automotive qualification, while the SMAJ17A-HF sacrifices 33% peak power handling and thermal robustness for reduced board area - making SMBJ17AHM3_A/H the optimal choice for AEC-Q101-compliant, high-energy surge protection.
Availability
SMBJ17AHM3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ17AHM3_A/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 optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ17AHM3_A/H at its rated peak pulse current?
The SMBJ17AHM3_A/H has a maximum clamping voltage (VC) of 27.6 V at 21.7 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC and ensures predictable overvoltage limiting for protected circuits. The SMBJ17AHM3_A/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C), with minimal drift due to its low temperature coefficient of VBR (0.090 %/°C).
Is SMBJ17AHM3_A/H qualified for automotive applications?
Yes, SMBJ17AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure (HM3 suffix with "H" revision and automotive-grade marking). It undergoes stress testing for temperature cycling, highly accelerated life testing (HALT), and surge endurance per AEC-Q101 Rev D. This makes SMBJ17AHM3_A/H suitable for under-hood and chassis-mounted automotive modules where reliability under thermal and electrical stress is critical.
What is the difference between SMBJ17AHM3_A/H and SMBJ17AHE3_A/H?
The SMBJ17AHM3_A/H and SMBJ17AHE3_A/H share identical electrical parameters (VWM, VBR, VC, PPPM) and package (SMB), but differ in material compliance and qualification: HM3 denotes halogen-free + RoHS + AEC-Q101, while E3 denotes RoHS-only (non-halogen-free) and commercial-grade only. SMBJ17AHM3_A/H is approved for automotive use; SMBJ17AHE3_A/H is not. Both use the same "A/H" tape-and-reel packaging format.
Does SMBJ17AHM3_A/H have polarity marking, and how is it identified?
Yes, SMBJ17AHM3_A/H is unidirectional and features a visible cathode band on the SMB (DO-214AA) package body - located at the cathode end. Per Vishay's mechanical drawings, the band aligns with the cathode terminal, which must be connected to the line being protected (e.g., 12 V rail), while the anode connects to ground. No marking appears on bidirectional variants, but SMBJ17AHM3_A/H always includes the band as a polarity indicator.
What is the thermal resistance and power derating behavior of SMBJ17AHM3_A/H?
SMBJ17AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads. Its power dissipation derates linearly above 25 °C ambient: at 50 °C, maximum continuous power drops to 5.0 W; at 100 °C, it falls to ~2.5 W. Derating curves are provided in Figure 2 of Vishay document 88392, confirming usable operation up to +150 °C junction temperature.
SMBJ17AHM3_A/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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ17AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17AHM3_A/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_A/H reliable?
The price and inventory of SMBJ17AHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ17AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17AHM3_A/H?
SMBJ17AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17AHM3_A/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_A/H?
For technical support, including SMBJ17AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ17AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ17AHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ17AHM3_A/H?
All SMBJ17AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17AHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ17AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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