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Vishay General Semiconductor - Diodes Division SMBJ170CA-M3/52
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- Part No.:
- SMBJ170CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CA-M3/52.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,222
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Product details
Overview
SMBJ170CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ170CA-M3/52 datasheet, SMBJ170CA-M3/52 pinout, SMBJ170CA-M3/52 application, or SMBJ170CA-M3/52 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), JEDEC MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per Vishay Document 88392 (Rev. 09-Jan-2024).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 10/1000 µs surge rating reflects real-world lightning and inductive-switching transients.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance from junction-to-ambient (100 °C/W) and junction-to-lead (20 °C/W) defined under standard PCB pad layout (0.2" × 0.2" copper). It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 189 V / 209 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 275 V at 2.2 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability under standardized 10/1000 µs waveform; validates surge robustness. |
| RθJA | 100 °C/W - Thermal resistance defining junction temperature rise per watt dissipated; critical for derating above 25 °C ambient. |
| TJ max. | +150 °C - Maximum allowable junction temperature; sets upper limit for thermal design and reliability margin. |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard SMT reflow without dry-pack requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path during positive or negative surges; connects to protected line or ground reference. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-series devices; forms dual-clamping junction with no functional polarity distinction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 600 W peak pulse power (10/1000 µs) | Validates immunity to IEC 61000-4-5 Level 3/4 surges and industrial load-switching transients. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping, reducing stress on protected ICs and MOSFETs. |
| MSL Level 1, 260 °C reflow compatible | Eliminates moisture sensitivity concerns and enables direct placement into high-volume SMT lines. |
| UL 497B recognized (QVGQ2) | Confirms compliance for telecom and industrial surge protection applications requiring safety certification. |
Applications
| Industrial Motor Drives | Telecom Line Interface |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from relay coils and motor windings. IC Role / Device Role: Bidirectional TVS placed across isolated signal inputs and low-side switch nodes. Use Value: Limits transient voltage to ≤275 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces and isolated amplifiers. |
Use Scenario: Surge suppression on RJ45 Ethernet PHY lines and analog telephone interface circuits exposed to lightning-induced surges. IC Role / Device Role: Primary front-end protection element between connector and PHY IC or line transformer. Use Value: Withstands 600 W pulses while maintaining <1.0 µA leakage at 170 V, preserving signal integrity in high-impedance receive paths. |
| Power Supply Input Rails | Automotive Body Control Modules |
|
Use Scenario: Secondary overvoltage clamp on 24 V DC input rails after primary fuse and common-mode choke. IC Role / Device Role: Fast-acting shunt protector triggered by load dump or alternator ripple spikes. Use Value: Clamps 10/1000 µs transients within 1 ns response time, limiting rail excursion to 275 V and protecting downstream DC/DC controllers. |
Use Scenario: ESD and surge protection on LIN bus lines and sensor supply outputs in non-AEC-Q101 variant modules. IC Role / Device Role: Bidirectional suppressor bridging LIN data line to chassis ground or local VBAT. Use Value: Halogen-free M3 construction meets automotive material compliance requirements while delivering 275 V clamping at 2.2 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free; uses standard matte tin plating. | No difference in clamping or surge rating; suitable where halogen-free requirement is not mandated. | Select when cost-sensitive commercial designs prioritize RoHS over halogen-free compliance. |
| SAC170CA | Same VWM/VBR/VC ratings but in smaller SOD-123FL package; lower PPPM (400 W) and higher RθJA (150 °C/W). | Limited to lower-energy transients; requires tighter thermal management due to reduced power handling. | Choose only for space-constrained layouts where 400 W surge capacity suffices and thermal derating is feasible. |
Compared with SMBJ170CA-M3/52, the E3 variant offers identical protection performance at lower material cost, while the SAC170CA trades package size for reduced surge robustness and thermal margin - making the M3/52 optimal for industrial-grade 600 W surge immunity with halogen-free compliance.
Availability
SMBJ170CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, and 24 V power supply input rails requiring stable component supply, long-term lifecycle support, and halogen-free manufacturing compliance.
Supply support for SMBJ170CA-M3/52 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, precision, and application-specific optimization.
The SMBJ series was developed for high-reliability surface-mount transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ170CA-M3/52 and how is it measured?
The SMBJ170CA-M3/52 has a maximum clamping voltage (VC) of 275 V, measured at a peak pulse current (IPPM) of 2.2 A using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage imposed on the protected circuit during a surge event and is confirmed per Vishay Document 88392, Table on page 2. The SMBJ170CA-M3/52 maintains this clamping performance bidirectionally.
Is SMBJ170CA-M3/52 suitable for automotive applications?
The SMBJ170CA-M3/52 is halogen-free and RoHS-compliant but not AEC-Q101 qualified. For automotive use, Vishay offers the HM3_X variant (e.g., SMBJ170CAHM3_B/H); the SMBJ170CA-M3/52 is appropriate for non-safety-critical body electronics or industrial systems where AEC-Q101 is not mandated. Always verify qualification status via the full ordering code before deployment in automotive ECUs.
How does the bidirectional configuration of SMBJ170CA-M3/52 affect its circuit placement?
The SMBJ170CA-M3/52 has no polarity marking and functions identically in either orientation, enabling direct placement across floating or AC-coupled nodes such as differential signal pairs, transformer secondaries, or ungrounded sensor outputs. Unlike unidirectional TVS diodes, it eliminates orientation errors during automated assembly and simplifies layout for symmetric protection schemes - a key advantage confirmed in Vishay's "DEVICES FOR BIDIRECTION APPLICATIONS" section.
What is the thermal resistance of SMBJ170CA-M3/52 and how does it impact derating?
The SMBJ170CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value directly determines power derating: at 75 °C ambient, maximum allowable continuous power drops to ~2.5 W (per Fig. 2 in Document 88392). Accurate thermal modeling using this RθJA is essential for reliability in sustained surge environments.
Does SMBJ170CA-M3/52 meet UL safety certification?
Yes - the SMBJ170CA-M3/52 is Underwriters Laboratories (UL) recognized under standard UL 497B for protectors, with file number E136766. This certification applies to both unidirectional and bidirectional variants and confirms suitability for use in telecom, industrial, and consumer equipment requiring third-party safety validation. The UL mark is referenced in Vishay Document 88392, footnote (+) on page 2.
SMBJ170CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ170CA-M3/52 FAQ
1.How can I place an order for SMBJ170CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CA-M3/52 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 SMBJ170CA-M3/52 reliable?
The price and inventory of SMBJ170CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ170CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CA-M3/52?
SMBJ170CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CA-M3/52 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 SMBJ170CA-M3/52?
For technical support, including SMBJ170CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ170CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ170CA-M3/52 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 SMBJ170CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ170CA-M3/52?
All SMBJ170CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CA-M3/52, 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 SMBJ170CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ170CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CA-M3/52 Tags
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