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Vishay General Semiconductor - Diodes Division SMAJ170C-E3/61
- Part No.:
- SMAJ170C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ170C-E3/61.pdf
- Description:
- TVS DIODE 170VWM 304VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,659
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Product details
Overview
SMAJ170C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on signal or power lines. It features a 170 V stand-off voltage (VWM), 304 A peak pulse current (IPPM) with 10/1000 µs waveform, 300 W peak pulse power rating above 78 V, and clamps to ≤304 V at IPPM. It is used for ESD and surge protection in industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMAJ170C-E3/61 datasheet, SMAJ170C-E3/61 pinout, SMAJ170C-E3/61 application, or SMAJ170C-E3/61 equivalent, key selection criteria include bi-directional clamping capability, low leakage (<1 µA at 170 V), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified as 189–231 V at 1 mA test current and clamping voltage (VC) of 304 V at 304 A peak pulse current. Its thermal resistance is 120 °C/W junction-to-ambient and 30 °C/W junction-to-lead, enabling reliable operation up to 150 °C junction temperature.
The device meets J-STD-020 MSL Level 1, supports solder reflow up to 260 °C, and exhibits <1 µA reverse leakage at rated stand-off voltage. Its 10/1000 µs surge rating is derated linearly above 25 °C ambient per Figure 2, and it delivers stable clamping performance without polarity marking-consistent with bi-directional SMAJ-C/CA series construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 170 V nominal systems. |
| VBR (min/max) | 189 V / 231 V at 1 mA - Ensures consistent avalanche initiation across production lots; guarantees clamping starts no later than 231 V. |
| VC @ IPPM | 304 V at 304 A - Clamped voltage during worst-case 10/1000 µs surge; limits downstream IC stress to ≤304 V. |
| IPPM | 304 A - Peak surge current handling capacity under standardized 10/1000 µs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| PPPM | 300 W - Peak pulse power dissipation above 78 V; sufficient for repetitive surge events at low duty cycle (0.01 %). |
| ID @ VWM | <1 µA - Ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance circuits. |
| TJ max | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No functional distinction between terminals; either end connects to protected line or ground-enables flexible layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, sensor bridges) without external polarity management. |
| 300 W peak pulse power (≥78 V) | Supports sustained surge immunity in industrial power rails and automotive battery-line interfaces where higher VWM is required. |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking; simplifies manufacturing logistics for high-volume SMT assembly. |
| RoHS-compliant & JESD201 Class 1A whisker tested | Ensures long-term reliability in lead-free assembly and eliminates tin whisker risk in mission-critical automotive and industrial applications. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, inductive switching), improving protection margin for sensitive analog front-ends. |
Applications
| Industrial Sensor Interfaces | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops, 0–10 V sensors) from inductive kickback and ESD in factory automation PLCs. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input or isolation amplifier. Use Value: Limits transient voltage to ≤304 V while maintaining <1 µA leakage-preserving measurement accuracy and preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding LIN bus transceivers and door module microcontrollers against load dump and jump-start surges in 12 V vehicle networks. IC Role / Device Role / Timing Role: Primary TVS on LIN data line and VBAT-fed power rail, mounted adjacent to connector entry points. Use Value: Withstands 304 A pulses without degradation and clamps within 1 ns-meeting ISO 16750-2 pulse 5a requirements for automotive electronics. |
| Telecom Line Interface Cards | Power Supply Input Stages |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs (e.g., TX+/−, RX+/−), coordinated with primary GDT or MOV stages. Use Value: Adds precise low-clamping layer after coarse suppression; 304 V clamping prevents damage to 100BASE-TX transformers rated for ≤350 V isolation. |
Use Scenario: Front-end surge protection for AC/DC adapters and DC/DC converters in medical and industrial equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk input capacitor or bridge rectifier output to absorb line-to-line and line-to-ground transients. Use Value: 300 W rating allows repeated surge absorption without thermal runaway; DO-214AC footprint integrates seamlessly into compact power supply layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170CA-E3/61 | Identical electrical specs and DO-214AC package; CA suffix denotes same bi-directional functionality as C suffix per Vishay documentation. | No functional difference; CA and C variants are interchangeable in all bi-directional use cases per datasheet Table 1 footnote. | Select SMAJ170CA-E3/61 only if legacy BOM or distributor inventory mandates CA suffix; electrically identical to SMAJ170C-E3/61. |
| SMBJ170C-E3/52 | Same VWM (170 V) and VC (304 V), but SMB package (DO-214AA) offers 600 W PPPM vs. 300 W-higher surge capacity due to larger thermal mass. | Preferred where higher surge energy (e.g., IEC 61000-4-5 Level 5) or improved thermal dissipation is required; requires PCB pad redesign. | Choose SMBJ170C-E3/52 when system-level surge testing exceeds 300 W capability; not drop-in compatible due to larger footprint and different thermal pad layout. |
Compared with SMAJ170C-E3/61, SMAJ170CA-E3/61 offers identical protection performance with no design change, while SMBJ170C-E3/52 provides higher surge robustness at the cost of board space and layout revision-making SMAJ170C-E3/61 optimal for cost- and space-constrained 300 W-class applications.
Availability
SMAJ170C-E3/61 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom line interface cards requiring stable component supply and RoHS-compliant surge protection.
Supply support for SMAJ170C-E3/61 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments-including automotive, industrial, and telecom-delivering consistent clamping with low leakage and robust surge handling in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ170C-E3/61 at its rated peak pulse current?
The SMAJ170C-E3/61 clamps to a maximum of 304 V when subjected to its rated peak pulse current of 304 A under the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation per Vishay Document 88390, ensuring predictable overvoltage limiting for downstream circuitry.
Is SMAJ170C-E3/61 unidirectional or bidirectional, and how is polarity identified?
SMAJ170C-E3/61 is a bi-directional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. As stated in the datasheet, bi-directional types like SMAJ170C-E3/61 have no polarity marking-there is no cathode band or terminal distinction, enabling orientation-agnostic PCB placement.
Does SMAJ170C-E3/61 meet automotive qualification standards?
SMAJ170C-E3/61 is commercial-grade (E3 suffix) and not AEC-Q101 qualified; for automotive applications, Vishay specifies the HE3-suffix variant (e.g., SMAJ170CHE3/61). The SMAJ170C-E3/61 remains suitable for non-safety-critical automotive subsystems where full qualification is not mandated.
What is the maximum reverse leakage current for SMAJ170C-E3/61 at its stand-off voltage?
At its 170 V stand-off voltage (VWM) and 25 °C ambient temperature, SMAJ170C-E3/61 exhibits a maximum reverse leakage current (ID) of 1 µA. This ultra-low leakage preserves signal integrity in high-impedance sensor and communication circuits without introducing measurable offset or loading.
Can SMAJ170C-E3/61 be used in place of SMAJ170A-E3/61?
No-SMAJ170C-E3/61 is bi-directional, whereas SMAJ170A-E3/61 is uni-directional with a cathode band marking. Substituting them would compromise protection on AC or floating lines; the "A" suffix indicates uni-directional operation, and mixing suffixes risks incorrect clamping behavior and potential device failure.
SMAJ170C-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 304V
- Current - Peak Pulse (10/1000µs):
- 990mA
- Power - Peak Pulse:
- 300W
- 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-214AC (SMA)
SMAJ170C-E3/61 FAQ
1.How can I place an order for SMAJ170C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ170C-E3/61 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 SMAJ170C-E3/61 reliable?
The price and inventory of SMAJ170C-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ170C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ170C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ170C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ170C-E3/61?
SMAJ170C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ170C-E3/61 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 SMAJ170C-E3/61?
For technical support, including SMAJ170C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ170C-E3/61 requirements.
6.How does Aetrix verify that SMAJ170C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ170C-E3/61 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 SMAJ170C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ170C-E3/61?
All SMAJ170C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ170C-E3/61, 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 SMAJ170C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ170C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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