My Inquiry
My Account
Alpha & Omega Semiconductor Inc. SMDJ170CA
- Part No.:
- SMDJ170CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ170CA.pdf
- Description:
- 1CH 170V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:9,757
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ170CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in DC power lines and signal interfaces. It features 170 V reverse stand-off voltage (VRWM), 275 V maximum clamping voltage (VC) at 11.0 A peak pulse current, and 3000 W peak pulse power dissipation on 10/1000 µs waveform.
For engineers reviewing the SMDJ170CA datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal resistance values, bidirectional clamping behavior, JEDEC-compliant mechanical data, and real-world selection guidance for industrial power supply, telecom interface, and automotive subsystem protection.
Technical Context
The SMDJ170CA operates as a bi-directional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling robust ESD and lightning surge suppression without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (189–209 V @ 1 mA) and low temperature coefficient (0.1% × VBR per °C).
Mounted on 8.0 mm × 8.0 mm copper pads, it achieves 15 °C/W junction-to-lead thermal resistance and supports repetitive surge duty cycles up to 0.01%, with sub-1 ps response time from 0 V to breakdown - critical for protecting sensitive analog front-ends and high-speed communication ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR min/max | 189–209 V @ 1 mA - Confirmed breakdown range ensures predictable turn-on under surge; tight tolerance enables precise system-level coordination. |
| VC @ IPPM | 275 V @ 11.0 A - Clamping voltage during 10/1000 µs surge; limits downstream voltage stress to <275 V under full-rated pulse. |
| PPPM | 3000 W - Peak pulse power handling on standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| TJ max | +150 °C - Maximum junction temperature rating; allows operation in high-ambient industrial environments with appropriate PCB copper area. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when soldered to 8 mm × 8 mm copper pads per JEDEC spec. |
| IR @ VRWM | 2.0 µA - Reverse leakage at rated stand-off voltage; negligible power loss and minimal impact on high-impedance sensing circuits. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating. Cathode identification via color band applies only to unidirectional variants; SMDJ170CA is bi-directional and has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional polarity - either terminal serves as cathode or anode depending on instantaneous voltage polarity; enables single-device protection of AC-coupled or floating lines. |
| Case / Body | Non-electrical mechanical structure | JEDEC-compliant DO-214AB outline with strain relief; requires 8.0 mm × 8.0 mm copper pad per terminal for thermal and mechanical reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Electrical symmetry in both directions - eliminates need for dual-diode configurations or polarity-aware layout in differential or AC signal paths. |
| Glass-passivated junction | Enhanced long-term stability and moisture resistance - meets IPC/JEDEC MSL1 rating with peak reflow at 260 °C. |
| Low profile SMC package | 3.6 mm height - enables compact placement near connectors or IC inputs without interfering with adjacent components or enclosures. |
| Fast response time | <1.0 ps rise to breakdown - protects against nanosecond-scale ESD transients before downstream ICs experience latch-up or gate oxide damage. |
| UL 94V-0 flammability | Self-extinguishing plastic housing - satisfies safety requirements for enclosed industrial and telecom equipment. |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24–48 V DC input rails in programmable logic controllers (PLCs) exposed to inductive switching surges and load dump events. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power domains. Use Value: Limits transient voltage to ≤275 V during 3000 W surges, preventing damage to 36 V-rated input capacitors and 5 V LDO regulators. | Use Scenario: RS-485/RS-422 differential data lines in base station remote radio units subjected to induced lightning surges. IC Role / Device Role / Timing Role: Bi-directional TVS across A/B bus lines and to ground, providing common-mode and differential-mode surge suppression. Use Value: Symmetrical clamping maintains signal integrity during ±209 V transients while adding <1 pF capacitance per line - no data rate degradation at 10 Mbps. |
| Automotive Body Control Module | Renewable Energy Inverter DC Link |
Use Scenario: LIN bus and sensor supply lines in body control modules where battery voltage spikes exceed 16 V during alternator load dump. IC Role / Device Role / Timing Role: Secondary protection stage after primary fuse and LC filter, absorbing residual energy not filtered by passive components. Use Value: Withstands 11.0 A peak pulse at 275 V clamping, meeting ISO 7637-2 Pulse 5a requirements without derating at +125 °C ambient. | Use Scenario: DC link between photovoltaic array and inverter H-bridge, subject to grid-switching transients and capacitor bank discharge events. IC Role / Device Role / Timing Role: High-power crowbar device placed across DC+ and DC− rails to shunt fault energy away from IGBT gate drivers. Use Value: 3000 W peak power rating and 150 °C TJ max enable reliable operation under repeated 10/1000 µs surges in outdoor-rated inverters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC170CA | Same VRWM (170 V), lower PPPM (1500 W), higher VC (290 V @ 10.3 A) | Lower surge capacity suits cost-sensitive consumer-grade power supplies with lower IEC 61000-4-5 test levels | Select SAC170CA only if system-level surge testing does not require full 3000 W capability and board space permits larger footprint. |
| SMCJ170CA | Identical electrical specs and DO-214AB package; manufactured by Vishay with same JEDEC outline and thermal performance | No functional difference - validated drop-in replacement with identical layout, thermal, and protection behavior | SMCJ170CA is suitable for dual-sourcing strategies where second-source qualification is required without redesign. |
Compared with SMDJ170CA, SAC170CA offers reduced surge margin but lower BOM cost, while SMCJ170CA provides identical protection performance with alternate supply chain assurance - enabling flexibility in procurement without compromising clamping accuracy or thermal reliability.
Availability
SMDJ170CA is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line interface, automotive body control module, and renewable energy inverter DC link applications requiring stable component supply and consistent surge immunity performance.
Supply support for SMDJ170CA 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, IGBTs, and protection devices with focus on efficiency, thermal performance, and reliability.
The SMDJ series is part of AOS's high-power TVS portfolio designed specifically for industrial, telecom, and automotive systems requiring robust 3000 W surge immunity in compact surface-mount packages.
FAQ
What is the breakdown voltage range of the SMDJ170CA?
The SMDJ170CA has a reverse breakdown voltage (VBR) range of 189 V to 209 V measured at 1 mA test current. This specified minimum and maximum ensures predictable clamping onset across manufacturing lots and temperature extremes, supporting coordinated protection schemes with downstream overvoltage detectors or supervisors. The SMDJ170CA's tight VBR tolerance directly enables reliable system-level surge margin allocation.
Is the SMDJ170CA unidirectional or bidirectional?
The SMDJ170CA is a bi-directional TVS diode, indicated by the "CA" suffix per AOS documentation. It exhibits symmetrical avalanche behavior in both polarities, allowing use across floating or AC-coupled lines without regard to orientation. Unlike unidirectional SMDJ170A, the SMDJ170CA does not have a cathode band and functions identically regardless of terminal connection - a key advantage in differential signal protection.
What is the maximum clamping voltage of the SMDJ170CA under surge conditions?
The SMDJ170CA has a maximum clamping voltage (VC) of 275 V at 11.0 A peak pulse current on the standard 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during full-rated surge events. The SMDJ170CA's clamping performance is guaranteed across its operating temperature range and forms the basis for selecting downstream component voltage ratings.
Does the SMDJ170CA meet RoHS and halogen-free requirements?
Yes, the SMDJ170CA is an AOS Green Product compliant with RoHS directives and halogen-free standards, using reduced levels of bromine and chlorine. It carries matte tin lead-free plating and conforms to JEDEC J-STD-020 MSL1 reflow specifications with a maximum peak temperature of 260 °C. The SMDJ170CA's environmental compliance is documented in AOS' Green Policy publication and supported by material declarations.
What thermal derating applies to the SMDJ170CA at elevated ambient temperatures?
The SMDJ170CA's peak pulse power rating follows a linear derating curve starting at 100% at 25 °C ambient, decreasing to approximately 50% at 125 °C ambient per the published Pulse Derating Curve. This behavior is governed by its 75 °C/W junction-to-ambient thermal resistance. For reliable operation above 85 °C, the SMDJ170CA requires adequate PCB copper area (8 mm × 8 mm per terminal) and airflow - critical for sustained surge duty in enclosed industrial enclosures.
SMDJ170CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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):
- 11A
- Power - Peak Pulse:
- 3000W (3kW)
- 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-214AB
SMDJ170CA FAQ
1.How can I place an order for SMDJ170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ170CA 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 SMDJ170CA reliable?
The price and inventory of SMDJ170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ170CA is usually 5 days.
3.What payment methods are accepted for SMDJ170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ170CA?
SMDJ170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ170CA 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 SMDJ170CA?
For technical support, including SMDJ170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ170CA requirements.
6.How does Aetrix verify that SMDJ170CA is sourced from the original manufacturer or authorized distributors?
All SMDJ170CA 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 SMDJ170CA meets industry standards.
7.What is the process for return or replacement of SMDJ170CA?
All SMDJ170CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ170CA, 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 SMDJ170CA part is unused and in its original packaging.
Return procedure for SMDJ170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ170CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
