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Vishay General Semiconductor - Diodes Division SMBJ170CAHE3_B/H
- Part No.:
- SMBJ170CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHE3_B/H.pdf
- Description:
- 600W,170V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
SMBJ170CAHE3_B/H 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 standoff voltage (VWM), 189–209 V breakdown range (VBR at 1 mA), 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ170CAHE3_B/H datasheet, SMBJ170CAHE3_B/H pinout, SMBJ170CAHE3_B/H application, or SMBJ170CAHE3_B/H equivalent, this part serves as a RoHS-compliant, AEC-Q101 qualified TVS for bidirectional overvoltage protection in automotive power supplies, industrial PLC inputs, and telecom line interface stages where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with no cathode/anode distinction - enabling use in AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the 20 °C/W junction-to-lead thermal resistance supports reliable surge dissipation under repeated transient events.
The device meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), has matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and delivers consistent clamping performance across -55 °C to +150 °C operating junction temperature range - validated for automotive-grade reliability per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 120/240 VAC-derived rails or 150 VDC bus protection. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM | 275 V at 2.2 A - Measured clamping voltage under 10/1000 µs surge; limits downstream component stress to ≤275 V during 600 W transient absorption. |
| PPPM | 600 W - Peak pulse power handling capability; sustains single 10/1000 µs transients up to 600 W without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| IPPM | 2.2 A - Peak pulse current corresponding to VC; defines maximum surge current the device safely diverts while maintaining specified clamping. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments without derating. |
| Package | SMB (DO-214AA) - Standardized 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), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal functions identically; no polarity dependency - simplifies PCB layout for AC or floating nodes. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; bidirectional symmetry eliminates need for orientation verification during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability under thermal cycling and humidity exposure. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil de-energization or motor commutation without failure or parameter shift. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during clamping - critical for protecting 200 V-rated MOSFETs and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; reduces manufacturing cost and avoids moisture-induced popcorn failures. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for industrial and telecom equipment enclosures. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rail to clamp positive and negative transients before they reach DC/DC converters and microcontrollers. Use Value: Limits voltage excursions to ≤275 V during 600 W surges, preserving 36 V-input buck regulators and AEC-Q100 MCU power domains. |
Use Scenario: Shielding analog sensor outputs (e.g., RTD, thermocouple amplifiers) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS connected between signal line and ground to shunt sub-100 ns ESD pulses away from precision op-amps and ADC front-ends. Use Value: Sub-1 ns response time and <1.0 µA leakage at 170 V ensure minimal signal distortion and no DC offset drift in µV-level measurements. |
| Telecom Line Interface Protection | PLC Digital Input Protection |
|
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs connected to outdoor cabling exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed differential-mode across data pair (A/B) and common-mode to ground to suppress both modes of coupling. Use Value: Symmetrical VBR and matched clamping enable balanced protection without skewing differential signaling integrity. |
Use Scenario: Securing 24 V digital input channels in programmable logic controllers against field-wiring faults and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: TVS placed across input terminal and COM rail to absorb 100 A surge currents from 24 V DC coils switching off. Use Value: 2.2 A IPPM rating and 275 V VC prevent latch-up in optocoupler input stages while maintaining >170 V steady-state noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA-E3/52 | Same electrical specs and SMB package, but commercial-grade (non-AEC-Q101); RoHS-compliant, MSL Level 1. | Lacks automotive qualification; suitable for industrial/commercial systems without AEC-Q101 requirement. | Select when cost sensitivity outweighs automotive reliability validation needs. |
| SMCJ170CAHE3_A/H | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating and higher IPPM (4.3 A). | Better suited for higher-energy transients; requires larger PCB area and different pad layout. | Choose when system-level surge testing exceeds 600 W or when design margin demands higher pulse robustness. |
Compared with SMBJ170CAHE3_B/H, the E3/52 variant offers identical protection performance at lower cost but excludes automotive qualification, while the SMCJ170CAHE3_A/H provides 2.5× higher surge capacity in a physically larger package - enabling trade-offs between board space, reliability tier, and transient energy level.
Availability
SMBJ170CAHE3_B/H is available at Aetrix Electronics and suitable for automotive power supply protection, industrial sensor interface protection, and PLC digital input protection requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ170CAHE3_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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - combining low clamping, fast response, and qualified robustness in compact surface-mount packages.
FAQ
What does the "CA" suffix indicate in SMBJ170CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ170CAHE3_B/H conducts and clamps symmetrically for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ170A), it has no cathode band marking and is ideal for AC-coupled lines, differential data buses, or floating power rails where polarity reversal may occur.
Is SMBJ170CAHE3_B/H suitable for ISO 7637-2 load dump protection?
SMBJ170CAHE3_B/H is not rated for full ISO 7637-2 Pulse 5a (load dump), which requires clamping at ≥300 V and handling ≥1000 W pulses. Its 600 W PPPM and 275 V VC make it appropriate for lower-energy transients like ISO 7637-2 Pulses 1, 2a, 3a/b, and ESD per IEC 61000-4-2 - but load dump requires higher-power devices such as 5.0SMDJ170CA or automotive-grade polymer hybrids.
How does the HE3 suffix affect SMBJ170CAHE3_B/H compliance status?
"HE3" indicates RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade E3 or halogen-free HM3 variants. The "B/H" denotes packaging: 7″ tape-and-reel, 750 units per reel, with "B" referencing the reel type and "H" the packaging code per Vishay's ordering matrix. This ensures full automotive supply chain traceability and process control.
What is the thermal resistance from junction to ambient for SMBJ170CAHE3_B/H?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ170CAHE3_B/H is 100 °C/W when mounted on minimum recommended pad layout (0.2″ × 0.2″ copper). However, its junction-to-lead resistance (RθJL) is 20 °C/W - making thermal performance highly dependent on PCB copper area and via count; for sustained surge duty, direct thermal coupling to internal ground planes is strongly advised.
Can SMBJ170CAHE3_B/H replace SMBJ150CAHE3_B/H in an existing design?
SMBJ170CAHE3_B/H can replace SMBJ150CAHE3_B/H only if the protected circuit's maximum operating voltage is ≥170 V and transient energy remains within 600 W. Its higher VWM increases noise immunity but raises clamping voltage (275 V vs. 243 V), potentially exceeding downstream component ratings. Verify VC margin and surge current profile before substitution.
SMBJ170CAHE3_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:
- -
- 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:
- 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)
SMBJ170CAHE3_B/H FAQ
1.How can I place an order for SMBJ170CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHE3_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 SMBJ170CAHE3_B/H reliable?
The price and inventory of SMBJ170CAHE3_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 SMBJ170CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHE3_B/H?
SMBJ170CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHE3_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 SMBJ170CAHE3_B/H?
For technical support, including SMBJ170CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ170CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHE3_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 SMBJ170CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHE3_B/H?
All SMBJ170CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHE3_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 SMBJ170CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ170CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHE3_B/H Tags
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