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Diodes Incorporated SMBJ170A-13-F
- Part No.:
- SMBJ170A-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170A-13-F.pdf
- Description:
- TVS DIODE 170VWM 275VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:5,609
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Product details
Overview
SMBJ170A-13-F from Diodes Incorporated is a unidirectional 600W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal interfaces. It features a 170V reverse standoff voltage (VRWM), 189V minimum breakdown voltage (VBR), 275V maximum clamping voltage (VC) at 2.2A peak pulse current, and SMB surface-mount package. Used in industrial power supplies to protect downstream regulators and controllers from lightning-induced surges.
For engineers reviewing the SMBJ170A-13-F datasheet, SMBJ170A-13-F pinout, SMBJ170A-13-F application, or SMBJ170A-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD ratings, peak pulse current capability under IEC 61000-4-5 waveform compliance, thermal derating above +25°C, and unidirectional polarity alignment with DC rail topology.
Technical Context
This TVS operates as a voltage-clamped shunt device triggered by transient overvoltage exceeding its breakdown threshold. Its glass-passivated silicon junction ensures stable avalanche characteristics and low leakage (<5µA at VRWM) across -55°C to +150°C operating range.
Designed for single-pulse suppression per IEC 61000-4-5 (10/1000µs waveform), it delivers 600W peak pulse power with 4.8W/°C linear derating above +25°C ambient and supports 100A non-repetitive forward surge current (8.3ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single high-energy transients without failure per IEC 61000-4-5 Level 4 testing. |
| Reverse Standoff Voltage | 170V - Maximum continuous DC voltage before significant leakage; sets upper limit for protected circuit operating voltage. |
| Breakdown Voltage | 189V min - Avalanche conduction initiates reliably within ±5% tolerance, ensuring predictable turn-on timing. |
| Clamping Voltage | 275V max @ 2.2A - Limits voltage seen by downstream components during surge, providing safe margin above 240VAC-derived rails. |
| Leakage Current | <5µA @ 170V - Negligible standby power loss and no interference with high-impedance sensing circuits. |
| Package | SMB - Standardized surface-mount outline (5.59mm × 3.94mm × 2.21mm) compatible with automated PCB assembly and IPC-7351B footprints. |
Pinout & Package
Two-terminal unidirectional TVS in SMB package: Cathode (marked band) and Anode. No internal complexity-functions as a polarity-sensitive voltage clamp between these terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path | Connected to system ground or low-side reference; conducts avalanche current during overvoltage events. |
| Anode | Protected line input | Connected to DC supply rail or signal line; clamps voltage rise by shunting excess energy to cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| 600W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV line-to-line, 2kV line-to-ground) without degradation. |
| UL 94V-0 molded case | Prevents flame propagation during catastrophic failure, satisfying industrial safety standards. |
| Lead-free & halogen-free | Complies with RoHS 2 and JEDEC J-STD-020 moisture sensitivity Level 1 for reflow compatibility. |
Applications
| Industrial AC/DC Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protects primary-side rectifier outputs and PFC controller inputs against lightning-induced surges on 230VAC mains-fed supplies. IC Role / Device Role: Unidirectional shunt clamp placed between DC bus (+) and chassis ground. Use Value: Clamps transient spikes to ≤275V, maintaining safe operating margin below 400V-rated electrolytic capacitors and MOSFETs. |
Use Scenario: Shields Ethernet PHY interface circuitry on DSLAM line cards from induced surges on twisted-pair copper lines. IC Role / Device Role: DC-coupled rail clamp on 3.3V or 5V bias rails feeding magnetics and transceivers. Use Value: Sub-5µA leakage avoids loading of high-impedance bias networks while delivering 2.2A clamping current at <275V. |
| Automotive Body Control Module (BCM) Power Rail | Programmable Logic Controller (PLC) Digital I/O Protection |
Use Scenario: Safeguards 12V battery-supplied microcontroller power domains in BCMs exposed to load-dump transients. IC Role / Device Role: Unidirectional TVS on VDD rail upstream of LDO regulators. Use Value: Withstands ISO 7637-2 Pulse 5a (75V/350ms) by clamping to 275V with minimal voltage overshoot. |
Use Scenario: Protects 24V digital input channels on PLC backplanes from field-wiring ESD and inductive kickback. IC Role / Device Role: Point-of-entry clamp on each optocoupler input channel. Use Value: 170V VRWM allows full utilization of 24V nominal rail headroom while suppressing >1kV fast transients. |
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-13-F | Bi-directional version; symmetrical clamping for AC-coupled or floating signal lines. | Required where bidirectional transients occur (e.g., RS-485, CAN bus), not suitable for DC rail protection. | Select only if protecting balanced differential pairs or AC signals; avoid for unidirectional DC rails due to doubled leakage at VRWM. |
| SMCJ170A | Same electrical specs but SMC package (7.11mm × 6.22mm); 1500W peak power rating. | Used when higher surge energy handling is needed, e.g., outdoor telecom enclosures or solar charge controllers. | Choose when board space permits larger footprint and system-level testing requires >600W margin; SMBJ170A-13-F preferred for space-constrained designs. |
Compared with SMBJ170CA-13-F and SMCJ170A, SMBJ170A-13-F provides optimal balance of compact SMB footprint, precise unidirectional clamping, and verified 600W IEC 61000-4-5 compliance-making it ideal for cost-sensitive, space-limited DC power rail protection where polarity is fixed.
Availability
SMBJ170A-13-F is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and PLC digital I/O circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ170A-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 and manufacturing operations across Asia and the Americas.
SMBJ series TVS diodes are part of Diodes' circuit protection product line, engineered specifically for robust, standardized overvoltage suppression in industrial, automotive, and communications infrastructure applications.
FAQ
What is the maximum clamping voltage of SMBJ170A-13-F and under what test condition?
The maximum clamping voltage is 275V, measured at a peak pulse current (IPP) of 2.2A using the 10/1000µs double-exponential waveform defined in IEC 61000-4-5. This value guarantees worst-case voltage limiting during standardized surge events and is validated per Diodes' DS19002 Rev. 20–2 test methodology.
Is SMBJ170A-13-F suitable for protecting AC-coupled signal lines?
No-SMBJ170A-13-F is unidirectional and must be installed with correct polarity (cathode to ground). For AC or bidirectional signal lines like RS-485 or CAN, use the bi-directional variant SMBJ170CA-13-F, which clamps symmetrically above and below ground reference.
How does temperature affect the clamping performance of SMBJ170A-13-F?
Clamping voltage increases slightly with junction temperature, but the device maintains specified VC limits up to +150°C. Derating begins above +25°C ambient: peak pulse power decreases linearly at 4.8W/°C, and steady-state power drops to 5.0W at +75°C lead temperature per Fig. 6 in DS19002.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for SMBJ170A-13-F?
SMBJ170A-13-F has MSL Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ≤30°C/60% RH without baking. It is fully compatible with standard Pb-free reflow profiles (peak 260°C, 30 seconds max above 217°C), per Diodes' qualified process documentation.
SMBJ170A-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:
- 1
- Bidirectional Channels:
- -
- 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
SMBJ170A-13-F FAQ
1.How can I place an order for SMBJ170A-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170A-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 SMBJ170A-13-F reliable?
The price and inventory of SMBJ170A-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 SMBJ170A-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ170A-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170A-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170A-13-F?
SMBJ170A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170A-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 SMBJ170A-13-F?
For technical support, including SMBJ170A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170A-13-F requirements.
6.How does Aetrix verify that SMBJ170A-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ170A-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 SMBJ170A-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ170A-13-F?
All SMBJ170A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170A-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 SMBJ170A-13-F part is unused and in its original packaging.
Return procedure for SMBJ170A-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170A-13-F Tags
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