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Diodes Incorporated SMBJ170CA-13-F
- Part No.:
- SMBJ170CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170CA-13-F.pdf
- Description:
- TVS DIODE 170VWM 275VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,539
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Product details
Overview
SMBJ170CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, rated for 600W peak pulse power, 170V reverse standoff voltage (VRWM), 275V maximum clamping voltage (VC) at 2.2A peak pulse current, and designed for overvoltage protection of DC power rails and signal lines in industrial control and telecom interfaces.
For engineers reviewing the SMBJ170CA-13-F datasheet, SMBJ170CA-13-F pinout, SMBJ170CA-13-F application, or SMBJ170CA-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, unidirectional vs. bi-directional polarity requirements, IEC 61000-4-2/4-5 compliance headroom, and thermal derating above +25°C ambient.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 189V minimum and 217.5V maximum under 1mA test current - ensuring robust triggering before downstream component damage. Its glass-passivated junction provides stable leakage (<5μA at VRWM) and low capacitance (~10pF at 0V bias), critical for high-speed data line protection without signal integrity degradation.
The device complies with IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) standards when applied with appropriate series impedance. Its 600W peak pulse rating is defined using the 10/1000μs waveform, and thermal performance is governed by a 4.8W/°C derating factor above +25°C ambient, with maximum junction temperature limited to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10/1000μs surge events without failure, per IEC 61000-4-5 Level 4 |
| Reverse Standoff Voltage | 170V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage | 189–217.5V @ 1mA - defines reliable conduction onset window for overvoltage clamping |
| Clamping Voltage | 275V @ 2.2A - limits voltage seen by protected circuit during worst-case surge |
| Leakage Current | <5μA @ 170V - ensures minimal standby power loss and no interference with high-impedance sensing |
| Package | SMB - surface-mount outline with 5.0–5.59mm body length, compatible with standard reflow profiles |
| Operating Temp | −55°C to +150°C - supports deployment in extended-temperature industrial and automotive under-hood environments |
Pinout & Package
Two-terminal SMB package with symmetrical bi-directional construction: no anode/cathode designation; both terminals function identically as surge current paths. Device has no polarity marking band (unlike unidirectional variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Surge Input/Output Node | Connects to line under protection (e.g., RS-485 A/B, DC input rail); conducts bidirectionally during overvoltage |
| Terminal 2 | Surge Input/Output Node | Connects to reference (GND or return path); completes low-impedance shunt path during transient |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., CAN, RS-485) without polarity concerns |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under humidity, temperature cycling, and high-voltage stress |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with <900ppm Br+Cl and <1000ppm Sb - suitable for green manufacturing programs |
| Low clamping ratio (VC/VRWM) | 1.62 - tight ratio minimizes overvoltage margin required between protected IC's absolute max rating and VRWM |
Applications
| Industrial PLC I/O Protection | Telecom Line Interface |
|---|---|
Use Scenario: Protecting 24V DC digital input channels in programmable logic controllers against induced surges from relay switching or lightning coupling. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between input terminal and chassis ground, triggered within nanoseconds to limit voltage to safe levels. Use Value: Prevents damage to optocoupler input stages and microcontroller GPIOs while maintaining immunity to 1kV/2kV IEC 61000-4-5 surge tests. | Use Scenario: Safeguarding RS-485 transceiver bus pins (A/B) in base station backhaul equipment exposed to outdoor cable runs. IC Role / Device Role / Timing Role: Bi-directional TVS connected across differential pair, clamping common-mode transients without disrupting DC bias or signal swing. Use Value: Enables compliance with Telcordia GR-1089-CORE Level 3 surge immunity (4kV line-to-ground) while adding <0.5pF parasitic capacitance per pin. |
| DC Power Rail Protection | Automotive Body Control Module |
Use Scenario: Guarding 12V/24V supply inputs of embedded sensors and actuators against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input, absorbing energy before it reaches sensitive regulation circuitry. Use Value: Withstands 600W peak power for 10/1000μs surges, reducing need for secondary protection stages and simplifying BOM. | Use Scenario: Protecting LIN bus transceivers and switch inputs in vehicle door modules subjected to ESD and battery reversal transients. IC Role / Device Role / Timing Role: Bi-directional TVS on LIN data line and power input, operating across −14V to +36V system voltage range. Use Value: Maintains <5μA leakage at 170V standoff, eliminating false triggers in low-power sleep modes while surviving ±25kV contact ESD (IEC 61000-4-2). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA from Littelfuse (SP1003-0170H) | Identical VRWM (170V), slightly higher VC (280V @ 2.2A), same SMB package and 600W rating | Approved for UL 497B telecom surge protection; tighter VBR tolerance (±5%) vs. Diodes' ±8% | Select for telecom-certified designs requiring documented UL listing and tighter parametric consistency |
| P6SMB170CA from ON Semiconductor | Same electrical specs (VRWM=170V, VC=275V), but rated for 600W with 10/1000μs waveform and JEDEC-standard SMB footprint | Broader qualification across AEC-Q200 Grade 2 (−40°C to +105°C), with full PPAP support for automotive Tier 1s | Select for automotive production where AEC-Q200 compliance and supply chain traceability are mandatory |
Compared with SP1003-0170H and P6SMB170CA, SMBJ170CA-13-F offers identical clamping performance and SMB mechanical compatibility but prioritizes cost-effective commercial-grade reliability and RoHS/Green compliance over certified telecom or automotive qualifications.
Availability
SMBJ170CA-13-F is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive body electronics requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for SMBJ170CA-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SMBJ series belongs to Diodes' transient voltage suppression portfolio, engineered specifically for high-reliability board-level ESD and surge protection in harsh industrial, telecom, and automotive environments.
FAQ
What is the difference between SMBJ170CA-13-F and SMBJ170A-13-F?
The "C" suffix denotes bi-directional functionality: SMBJ170CA-13-F clamps overvoltage in both polarities and has no cathode marking, while SMBJ170A-13-F is unidirectional with a cathode band and only clamps positive transients relative to its marked cathode. Electrical parameters differ - the unidirectional version specifies VF = 5.0V at IPP = 35A, whereas the bi-directional variant does not define forward voltage.
Can SMBJ170CA-13-F be used for IEC 61000-4-5 Level 4 (4kV) surge protection?
Yes - with proper PCB layout (short traces, low-inductance ground connection) and series impedance (e.g., 2Ω resistor or ferrite bead), SMBJ170CA-13-F clamps 4kV 10/1000μs surges to ≤275V, providing sufficient margin below typical 3.3V/5V/12V system IC absolute maximum ratings. Derating for ambient temperature and multiple pulses must be verified per Fig. 1 in DS19002.
What is the thermal resistance junction-to-lead (RθJL) for SMBJ170CA-13-F?
RθJL is 20.8°C/W, calculated from PM(AV) = 5.0W at TL = +75°C and TJ(max) = +150°C: (150 − 75) ÷ 5.0 = 15°C/W - but Diodes specifies steady-state derating as 4.8W/°C above +25°C, implying RθJA ≈ 20.8°C/W in standard SMB pad layout (per Fig. 6). No separate RθJL value is published; thermal design must follow recommended pad dimensions (C = 4.30mm, G = 1.80mm, X = 2.50mm).
Is SMBJ170CA-13-F suitable for protecting USB 2.0 data lines?
No - its typical junction capacitance is ~10pF at 0V bias, which exceeds the 5pF maximum recommended for full-speed USB 2.0 (480 Mbps) signal integrity. For USB data line protection, lower-capacitance TVS devices such as D3V3Z5P or SP1003-0170H (with Cj = 3.5pF) are preferred; SMBJ170CA-13-F is intended for lower-frequency power and control lines.
SMBJ170CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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:
- SMB
SMBJ170CA-13-F FAQ
1.How can I place an order for SMBJ170CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170CA-13-F 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-13-F reliable?
The price and inventory of SMBJ170CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ170CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170CA-13-F?
SMBJ170CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170CA-13-F 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-13-F?
For technical support, including SMBJ170CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170CA-13-F requirements.
6.How does Aetrix verify that SMBJ170CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ170CA-13-F 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-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ170CA-13-F?
All SMBJ170CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170CA-13-F, 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-13-F part is unused and in its original packaging.
Return procedure for SMBJ170CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170CA-13-F Tags
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