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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3/H
- Part No.:
- SMBJ170CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,403
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Product details
Overview
SMBJ170CAHM3/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 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 - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ170CAHM3/H datasheet, SMBJ170CAHM3/H pinout, SMBJ170CAHM3/H application, or SMBJ170CAHM3/H equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for bidirectional overvoltage protection where low clamping ratio, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (189–209 V), ID ≤1.0 µA at VWM, and VC ≤275 V at IPPM = 2.2 A. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance under repetitive transient stress.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), requiring PCB copper pad area ≥0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal for rated PPPM derating. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 189 V / 209 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during transients |
| VC @ IPPM | ≤275 V at 2.2 A (10/1000 µs) - clamped voltage seen by protected circuit; determines downstream component stress level |
| PPPM | 600 W - peak transient energy absorption capability; enables robust protection against IEC 61000-4-5 Level 4 surges |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off; minimizes standby power loss in high-impedance circuits |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood or enclosed industrial environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Completes low-impedance surge shunt path during either polarity excursion; connects to GND or reference plane |
| Cathode | Transient return path (bidirectional) | Functionally identical to Anode in CA devices; forms symmetrical clamping node between protected line and reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 up to 4 kV open-circuit voltage |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity handling or baking |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero defect reliability |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20E environmental compliance requirements |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs from ESD and inductive switching spikes in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or supply rail to clamp transients before they reach IC inputs. Use Value: Limits clamped voltage to ≤275 V, preserving integrity of 3.3 V/5 V interface ICs rated for ≤36 V absolute maximum ratings. |
Use Scenario: Shielding Ethernet PHY front-end and DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary surge suppression element located at connector entry point, upstream of common-mode chokes and data transformers. Use Value: Absorbs 600 W transient energy while maintaining <1.0 µA leakage at 170 V, avoiding DC bias shift in high-impedance line receivers. |
| Automotive Body Control Module | Power Supply Input Stage |
|
Use Scenario: Safeguarding LIN bus nodes and LED driver control lines in door modules and lighting ECUs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS on low-voltage control rails, coordinated with primary fuses and upstream TVS arrays. Use Value: AEC-Q101 qualification ensures operation at TJ = +150 °C and survival through 1000 thermal cycles, matching vehicle lifetime requirements. |
Use Scenario: Clamping input surges on 24 V DC industrial power supplies feeding PLC I/O cards and motor controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after input fuse but before bulk capacitance and DC-DC converter input stage. Use Value: 170 V VWM allows use on 24 V systems with 100 % tolerance margins and 20 % ripple, preventing false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHE3/H | Same electrical specs, RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification | Suitable for commercial/industrial use only; not approved for automotive under-hood deployment | Select when halogen-free content is not mandated and automotive qualification is unnecessary |
| SMAJ170CAHM3 | Lower PPPM (400 W), same VWM/VBR/VC; SMA package (smaller footprint, higher RθJA) | Acceptable for lower-energy transients or space-constrained layouts where thermal margin permits | Choose when board area is critical and surge threat level is limited to IEC 61000-4-2/4-4, not full 4-5 |
Compared with SMBJ170CAHM3/H, the HE3 variant trades halogen-free content and automotive qualification for cost reduction, while the SMAJ170CAHM3 sacrifices 33 % pulse power and thermal performance for 30 % smaller PCB footprint - making SMBJ170CAHM3/H optimal for high-reliability, high-energy surge environments.
Availability
SMBJ170CAHM3/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ170CAHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMBJ series delivers high-power, surface-mount TVS protection optimized for industrial, automotive, and telecom systems demanding precise clamping, low leakage, and AEC-Q101 validation - with HM3 variants targeting halogen-free, automotive-qualified designs.
FAQ
What does the "CA" suffix indicate in SMBJ170CAHM3/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ170CAHM3/H provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, it has no cathode band marking and exhibits identical VBR and VC characteristics in either polarity - essential for protecting AC-coupled or floating signal paths where polarity reversal may occur.
Is SMBJ170CAHM3/H compatible with lead-free reflow soldering processes?
Yes, SMBJ170CAHM3/H meets MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, fully compatible with standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for reliable wetting and intermetallic formation, eliminating need for pre-baking or special handling prior to SMT assembly.
How does the HM3 suffix differ from the HE3 suffix in Vishay SMBJ devices?
The HM3 suffix in SMBJ170CAHM3/H indicates halogen-free, RoHS-compliant construction plus AEC-Q101 qualification, whereas HE3 denotes RoHS compliance without halogen-free content or automotive qualification. Both share identical electrical parameters, but HM3 is certified for automotive under-hood use, including thermal cycling and humidity testing per AEC standards - a distinction critical for Tier 1 automotive BOMs.
What is the maximum clamping voltage SMBJ170CAHM3/H achieves during a 10/1000 µs surge?
SMBJ170CAHM3/H clamps to a maximum of 275 V when subjected to its rated peak pulse current of 2.2 A (10/1000 µs waveform). This value is measured under standardized test conditions with 0.2" × 0.2" copper pads per terminal and represents the worst-case voltage imposed on downstream circuitry - enabling accurate margin analysis against IC absolute maximum ratings.
Can SMBJ170CAHM3/H be used in place of a unidirectional SMBJ170A variant?
No - SMBJ170CAHM3/H is strictly bidirectional and cannot replace unidirectional SMBJ170A in DC-biased applications like power rail protection, where forward conduction must be blocked. Attempting substitution risks forward conduction during normal operation due to absence of polarity marking and symmetrical IV curve. Use only where bidirectional clamping is explicitly required and circuit topology supports it.
SMBJ170CAHM3/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:
- -
- 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)
SMBJ170CAHM3/H FAQ
1.How can I place an order for SMBJ170CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3/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 SMBJ170CAHM3/H reliable?
The price and inventory of SMBJ170CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3/H?
SMBJ170CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3/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 SMBJ170CAHM3/H?
For technical support, including SMBJ170CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3/H requirements.
6.How does Aetrix verify that SMBJ170CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3/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 SMBJ170CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3/H?
All SMBJ170CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3/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 SMBJ170CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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