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Vishay General Semiconductor - Diodes Division SMBJ170CAHE3_A/I
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- Part No.:
- SMBJ170CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHE3_A/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
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Product details
Overview
SMBJ170CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤275 V at 2.2 A peak surge current - used in industrial motor drives and telecom power supplies for IEC 61000-4-5 surge protection.
For engineers reviewing the SMBJ170CAHE3_A/I datasheet, SMBJ170CAHE3_A/I pinout, SMBJ170CAHE3_A/I application, or SMBJ170CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transient events.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design (0.2" × 0.2") to sustain 5.0 W steady-state dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin for 170 V DC bus protection. |
| VBR min/max | 189 V / 209 V at 1 mA - guaranteed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤275 V at 2.2 A - clamping voltage limits downstream IC stress during 10/1000 µs surges per IEC 61000-4-5. |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform enables robust lightning/surge immunity. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - high junction temperature rating supports operation in enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with cathode/anode symmetry enabling either orientation in circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; bidirectional conduction allows placement across AC lines or ungrounded differential pairs without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and infotainment power rails. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 2.2 A without degradation - meets IEC 61000-4-5 Level 4 (4 kV) when properly mounted. |
| UL 497B recognized | QVGQ2 certification confirms suitability as primary protector in telecom and industrial data line applications per safety standard. |
| MSL Level 1 | Zero floor life limitation and 260 °C peak reflow compatibility enable standard SMT processing without dry pack or baking. |
| Glass passivated junction | Stable VBR tolerance and low leakage over lifetime - critical for long-term field reliability in harsh environments. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus inputs against inductive switching spikes and lightning-induced surges in variable-frequency drives. IC Role / Device Role / Timing Role: Primary transient clamp placed across input rectifier output or DC link capacitor. Use Value: Limits transient voltage to ≤275 V, preventing MOSFET avalanche failure and extending electrolytic capacitor life. |
Use Scenario: Surge suppression on -48 V telecom power distribution boards exposed to lightning coupling via long feeder lines. IC Role / Device Role / Timing Role: Bidirectional shunt protector on secondary-side DC output before point-of-load regulators. Use Value: Maintains system uptime by absorbing 4 kV IEC 61000-4-5 surges without latch-up or parametric shift. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Input protection for LIN/CAN transceivers and microcontroller I/O pins in BCMs subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on 12 V supply rail and communication lines. Use Value: AEC-Q101 qualification ensures survival through 1000+ thermal cycles and 1000 h HTRB testing. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers) against ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp on differential sensor inputs. Use Value: <1.0 µA leakage preserves measurement accuracy while clamping ±275 V transients in <1 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free materials are mandated by OEM environmental policy. | Direct material substitution when halogen-free compliance is required without redesign. |
| SMCJ170CAHE3_A/I | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Higher power handling and better thermal performance; requires larger PCB area and different land pattern. | Choose when surge energy exceeds 600 W or ambient temperature exceeds 85 °C with limited copper area. |
Compared with SMBJ170CAHE3_A/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ170CAHE3_A/I provides higher surge capacity and thermal headroom at the cost of increased board space and layout change.
Availability
SMBJ170CAHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ170CAHE3_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 application-specific performance.
The SMBJ series targets board-level transient protection in automotive, industrial, and telecom systems, with design focus on high-power density, AEC-Q101 compliance, and UL recognition for safety-critical deployments.
FAQ
What does the "CA" suffix indicate in SMBJ170CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ170CAHE3_A/I conducts and clamps symmetrically in both forward and reverse directions. This enables use across AC signals, floating buses, or differential lines without polarity constraints, unlike unidirectional variants (e.g., SMBJ170AHE3_A/I) which require correct cathode orientation.
Is SMBJ170CAHE3_A/I suitable for automotive applications?
Yes, SMBJ170CAHE3_A/I is AEC-Q101 qualified and rated for -55 °C to +150 °C operation, making it suitable for automotive body control modules, infotainment power rails, and LIN/CAN interface protection. Its glass-passivated junction and MSL Level 1 reflow compatibility further support automotive manufacturing requirements.
What is the clamping voltage of SMBJ170CAHE3_A/I under surge conditions?
SMBJ170CAHE3_A/I clamps to a maximum of 275 V at its rated peak pulse current of 2.2 A (10/1000 µs waveform). This value is guaranteed per datasheet Table 1 and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the HE3 suffix differ from E3 or M3 in SMBJ170CAHE3_A/I?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, whereas "E3" is RoHS-compliant commercial grade only, and "M3" adds halogen-free compliance. SMBJ170CAHE3_A/I thus meets both environmental and automotive reliability standards without trade-offs in electrical performance.
Can SMBJ170CAHE3_A/I be used in place of a unidirectional TVS like SMBJ170AHE3_A/I?
No - SMBJ170CAHE3_A/I is bidirectional and lacks polarity marking, while SMBJ170AHE3_A/I is unidirectional with cathode band identification. Substitution requires circuit review: bidirectional use is mandatory for AC or floating nodes; unidirectional is required for DC rails where reverse conduction must be blocked.
SMBJ170CAHE3_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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170CAHE3_A/I FAQ
1.How can I place an order for SMBJ170CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHE3_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 SMBJ170CAHE3_A/I reliable?
The price and inventory of SMBJ170CAHE3_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 SMBJ170CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHE3_A/I?
SMBJ170CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHE3_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 SMBJ170CAHE3_A/I?
For technical support, including SMBJ170CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ170CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHE3_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 SMBJ170CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHE3_A/I?
All SMBJ170CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHE3_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 SMBJ170CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ170CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHE3_A/I Tags
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Diodes Incorporated
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