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Vishay General Semiconductor - Diodes Division SMBJ170CAHM3_B/H
- Part No.:
- SMBJ170CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CAHM3_B/H.pdf
- Description:
- 600W,170V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,439
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Product details
Overview
SMBJ170CAHM3_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 stand-off voltage (VWM), 209–231 V breakdown range (VBR), 600 W peak pulse power (10/1000 µs), 2.2 A maximum clamping current (IPPM), and 275 V maximum clamping voltage (VC) - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ170CAHM3_B/H datasheet, SMBJ170CAHM3_B/H pinout, SMBJ170CAHM3_B/H application, or SMBJ170CAHM3_B/H equivalent, this page delivers verified electrical specs, bidirectional TVS behavior, thermal derating curves, AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design per Vishay's 0.2" × 0.2" (5.0 mm × 5.0 mm) recommendation.
The SMBJ170CAHM3_B/H meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports repetitive surge duty cycle ≤0.01%, and exhibits a temperature coefficient of VBR of +0.108 %/°C - critical for high-temperature industrial environments where clamping voltage drift must remain predictable across -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/max) | 209 V / 231 V at 1.0 mA test current - guaranteed avalanche onset range; ensures consistent turn-on under ESD/lightning surges |
| VC @ IPPM | 275 V at 2.2 A (10/1000 µs) - peak clamped voltage seen by protected circuit; limits stress on downstream ICs or MOSFETs |
| PPPM | 600 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV) |
| IPPM | 2.2 A - maximum non-repetitive surge current; derived from 10/1000 µs waveform; determines minimum trace width and fuse coordination |
| TJ max. | +150 °C - maximum junction temperature; sets upper limit for ambient + power dissipation design in sealed enclosures |
| Leakage (ID) | ≤1.0 µA at VWM - ultra-low reverse leakage preserves signal integrity and battery life in always-on sensor nodes |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002/JESD22-B102. Bidirectional construction means no cathode/anode marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; voltage clamping occurs across either polarity - eliminates orientation errors during automated placement |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN bus) without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV open-circuit / 2 kA short-circuit without degradation |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for under-hood ECUs |
| MSL Level 1 rating | Allows unlimited floor life and standard 260 °C reflow profile without baking - simplifies SMT manufacturing flow |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD >15 kV), improving protection margin for sensitive analog front-ends |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting 4–20 mA current loop transmitters from inductive switching spikes and lightning-induced surges on field wiring. IC Role / Device Role / Timing Role: Bidirectional TVS placed across loop terminals to clamp ±1 kV transients before they reach precision DACs or op-amps. Use Value: Prevents latch-up or permanent damage to analog signal conditioning ICs while maintaining <1 µA leakage to preserve loop accuracy. |
Use Scenario: Shielding Ethernet PHY or xDSL line drivers from induced surges on twisted-pair telephone lines exposed to outdoor environments. IC Role / Device Role / Timing Role: Placed differential-mode across tip/ring pairs to suppress common-mode surges without distorting 1–100 MHz signal integrity. Use Value: Limits clamped voltage to ≤275 V while adding <1 pF junction capacitance - avoids signal attenuation or jitter in high-speed data links. |
| Automotive Body Control Module | Power Supply Input Stage |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 Pulse 5a/b events in vehicle door modules. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to shunt surge energy before it propagates into 3.3 V/5 V logic domains. Use Value: AEC-Q101 qualification ensures operation over -40 °C to +125 °C ambient with no parametric shift after 1000 surge cycles. |
Use Scenario: Front-end protection for 24 V DC input rails feeding industrial PLCs or PoE-powered devices subject to accidental AC mains contact. IC Role / Device Role / Timing Role: Paired with a series fuse and MOV to absorb initial surge energy and prevent catastrophic failure of downstream regulators. Use Value: 275 V clamping voltage provides ≥30 V margin above 24 V nominal rail, enabling reliable hold-off during sustained overvoltage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CAHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-halogen-free); lacks JESD201 Class 2 whisker rating | Suitable for non-automotive industrial use where halogen-free compliance is not mandated by end-equipment standards | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is unnecessary |
| SMAJ170CAHM3 | Lower 400 W PPPM, same VWM/VC; SMA (DO-214AC) package with smaller footprint and higher thermal resistance (150 °C/W) | Acceptable for lower-energy surge environments (e.g., consumer USB ports) but insufficient for IEC 61000-4-5 Level 4 | Choose only if board space is constrained and surge threat level is limited to ESD or low-energy switching noise |
Compared with SMBJ170CAHM3_B/H, the HE3 variant trades halogen-free construction for lower cost in non-automotive settings, while the SMAJ170CAHM3 sacrifices 33% pulse power and thermal performance for compactness - neither offers drop-in replacement due to differing power ratings and package thermal profiles.
Availability
SMBJ170CAHM3_B/H is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and 24 V DC power supply input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ170CAHM3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial automation, and telecom infrastructure where robustness, AEC-Q101 compliance, and precise clamping are mandatory.
FAQ
What is the clamping voltage of SMBJ170CAHM3_B/H at its rated peak pulse current?
The SMBJ170CAHM3_B/H has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current of 2.2 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience more than 275 V during surge events - critical for ensuring compatibility with 300 V-rated downstream components. The SMBJ170CAHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMBJ170CAHM3_B/H suitable for automotive applications?
Yes, SMBJ170CAHM3_B/H is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and surge endurance specifically for automotive electronic systems. Its halogen-free, RoHS-compliant construction and JESD201 Class 2 whisker resistance make it appropriate for under-hood and body control module deployments. The SMBJ170CAHM3_B/H is explicitly designated for automotive use in Vishay's ordering nomenclature (HM3 suffix).
How does the bidirectional configuration of SMBJ170CAHM3_B/H affect PCB layout?
The bidirectional nature of SMBJ170CAHM3_B/H eliminates polarity marking - both terminals are functionally identical, so no orientation check is needed during placement. This simplifies automated assembly and reduces risk of misorientation-related failures. Layout requires symmetric 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to maintain specified thermal resistance (RθJA = 100 °C/W) and ensure reliable 600 W surge handling. The SMBJ170CAHM3_B/H does not require ground reference routing asymmetry.
What is the maximum reverse leakage current for SMBJ170CAHM3_B/H at its stand-off voltage?
The SMBJ170CAHM3_B/H specifies a maximum reverse leakage current (ID) of 1.0 µA at its 170 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents signal distortion in high-impedance sensor interfaces. Leakage remains below 5 µA even at 125 °C junction temperature, supporting reliable operation in thermally demanding industrial enclosures.
Does SMBJ170CAHM3_B/H meet moisture sensitivity level requirements for lead-free reflow?
Yes, SMBJ170CAHM3_B/H is rated MSL Level 1 per J-STD-020, permitting unlimited floor life and compatibility with standard lead-free reflow profiles peaking at 260 °C. This eliminates the need for dry-packaging or baking prior to assembly - streamlining manufacturing for high-volume SMT lines. The SMBJ170CAHM3_B/H achieves this via optimized molding compound and terminal plating that resist popcorning and intermetallic growth during thermal cycling.
SMBJ170CAHM3_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)
SMBJ170CAHM3_B/H FAQ
1.How can I place an order for SMBJ170CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CAHM3_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 SMBJ170CAHM3_B/H reliable?
The price and inventory of SMBJ170CAHM3_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 SMBJ170CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ170CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CAHM3_B/H?
SMBJ170CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CAHM3_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 SMBJ170CAHM3_B/H?
For technical support, including SMBJ170CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ170CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170CAHM3_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 SMBJ170CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ170CAHM3_B/H?
All SMBJ170CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CAHM3_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 SMBJ170CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ170CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CAHM3_B/H Tags
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