My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J17CAHM3_A/I
- Part No.:
- SMB8J17CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,758
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J17CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 17 V standoff voltage (VWM), 27.6 V clamping voltage (VC) at 29.0 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J17CAHM3_A/I datasheet, SMB8J17CAHM3_A/I pinout, SMB8J17CAHM3_A/I application, or SMB8J17CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.62), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown junction to divert surge energy away from downstream ICs. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints, and its glass-passivated chip ensures stable breakdown characteristics across temperature.
The SMB8J17CAHM3_A/I delivers consistent clamping performance under repetitive surges up to TJ = 150 °C, with thermal resistance RθJL = 20 °C/W enabling effective heat transfer to PCB copper pads. Its 1.0 µA max reverse leakage at VWM supports low-power sensor biasing integrity in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 18.9 V / 20.9 V at IT = 1 mA - precise breakdown threshold ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 27.6 V at 29.0 A - clamping voltage limits stress on downstream components during 10/1000 µs surge. |
| PPPM | 800 W - peak pulse power handling capacity per single transient event under standard waveform. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage preserves battery life and signal integrity in low-current sensor paths. |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive and industrial ambient conditions. |
| MSL Level | Level 1 (260 °C peak reflow) - compatible with standard SMT assembly without dry-pack requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking - symmetrical terminals suitable for AC line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional operation eliminates orientation concerns during placement. |
| Case (cathode band absent) | Thermal and mechanical interface | No cathode band marking confirms bidirectional configuration; thermal path relies on soldered pad area (0.2" × 0.2") for RθJA = 72 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment power rails. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and supports lead-free reflow without compromising reliability. |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes voltage overshoot during surge, protecting 3.3 V and 5 V logic interfaces without additional buffering. |
| MSL Level 1 rating | Enables direct use from reel without baking, reducing manufacturing overhead in high-volume SMT lines. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: With 27.6 V clamping and AEC-Q101 qualification, SMB8J17CAHM3_A/I prevents latch-up and gate oxide damage in 12 V automotive domains. |
Use Scenario: Safeguarding PLC digital input modules against inductive kickback from solenoids, relays, and motor drivers. IC Role / Device Role / Timing Role: Standoff-clamp protector on 24 V DC input lines, absorbing 800 W surges without degradation over >10,000 cycles. Use Value: 1.0 µA leakage at 17 V VWM avoids false triggering in high-impedance optocoupler input circuits. |
| USB Type-C Port Protection | RS-485 Transceiver Protection |
Use Scenario: Guarding USB 2.0 D+/D− lines against ESD and cable discharge events in portable automotive accessories. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ not specified but typical <100 pF per Vishay SMB series) placed adjacent to connector. Use Value: Symmetrical clamping ensures equal protection for both data lines without skew or polarity dependency. |
Use Scenario: Shielding RS-485 transceivers (e.g., SN65HVD230) from lightning-induced surges on long industrial fieldbus runs. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of common-mode choke and transceiver, rated for ±15 kV contact ESD per IEC 61000-4-2. Use Value: 800 W PPPM handles multi-kA induced surges while maintaining signal integrity via fast 10/1000 µs response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J17CAHE3_A/I | Same electrical specs, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Lacks halogen-free validation; acceptable for commercial/industrial, not automotive Tier-1 if HM3 required. | Select when halogen-free compliance is not mandated by end-customer specification. |
| SMAJ17CA | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA). | Insufficient for 800 W surge events; limited to lower-energy interfaces like UART or I²C. | Choose only for space-constrained designs where surge energy is confirmed ≤400 W. |
Compared with SMB8J17CAHM3_A/I, the HE3 variant trades halogen-free status for broader commercial availability, while the SMAJ17CA sacrifices power handling for board space - making SMB8J17CAHM3_A/I the optimal choice for AEC-Q101–mandated, high-energy automotive and industrial protection.
Availability
SMB8J17CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB Type-C accessory protection, and RS-485 fieldbus systems requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB8J17CAHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The SMB8JxxCA family targets high-reliability transient suppression in automotive and industrial environments, engineered specifically for AEC-Q101 compliance, robust surge handling, and seamless SMT integration.
FAQ
What is the clamping voltage of SMB8J17CAHM3_A/I at its rated peak pulse current?
The SMB8J17CAHM3_A/I has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 29.0 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream 3.3 V or 5 V ICs remain within safe operating limits during surge events. The SMB8J17CAHM3_A/I achieves this with a clamping ratio of 1.62 (VC/VWM), confirming efficient transient suppression.
Is SMB8J17CAHM3_A/I suitable for automotive applications?
Yes, SMB8J17CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting Tier-1 automotive requirements for under-hood and cabin electronics. It is explicitly rated for operation from –55 °C to +150 °C junction temperature and validated for repetitive surge endurance in engine control units and ADAS sensor modules. The SMB8J17CAHM3_A/I datasheet confirms compliance per JESD22-A108 and J-STD-020 MSL Level 1.
What does the "HM3" suffix mean in SMB8J17CAHM3_A/I?
The "HM3" suffix in SMB8J17CAHM3_A/I denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard (www.vishay.com/doc?99912), with whisker resistance certified to JESD201 Class 2. It distinguishes the part from E3 (RoHS only) and HE3 (AEC-Q101 + RoHS) variants. The "_A/I" indicates packaging: "A" = revision code, "I" = 13-inch tape-and-reel (3200 units/reel). This makes SMB8J17CAHM3_A/I appropriate for high-reliability automotive production.
How does SMB8J17CAHM3_A/I differ from unidirectional SMB10J17A?
SMB8J17CAHM3_A/I is bidirectional with symmetric clamping for AC or differential lines, while SMB10J17A is unidirectional and requires correct polarity orientation. SMB8J17CAHM3_A/I offers 800 W PPPM and 29.0 A IPPM, whereas SMB10J17A provides 1000 W PPPM and 36.2 A IPPM - reflecting higher surge capacity for DC-biased applications. Both share the same SMB package and 17 V VWM, but SMB8J17CAHM3_A/I's bidirectionality and AEC-Q101/HM3 make it preferred for automotive sensor pairs and communication buses.
What is the thermal resistance of SMB8J17CAHM3_A/I, and how does it affect layout?
SMB8J17CAHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation under repeated surges, PCB layout must provide minimum pad dimensions matching Vishay's recommended mounting footprint (0.086" × 0.220"), and avoid thermal isolation. This ensures SMB8J17CAHM3_A/I sustains its 150 °C max junction temperature rating without derating.
SMB8J17CAHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 29A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J17CAHM3_A/I FAQ
1.How can I place an order for SMB8J17CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHM3_A/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 SMB8J17CAHM3_A/I reliable?
The price and inventory of SMB8J17CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J17CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHM3_A/I?
SMB8J17CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHM3_A/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 SMB8J17CAHM3_A/I?
For technical support, including SMB8J17CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J17CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHM3_A/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 SMB8J17CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHM3_A/I?
All SMB8J17CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHM3_A/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 SMB8J17CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J17CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
