My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J17CAHM3/I
- Part No.:
- SMA5J17CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J17CAHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,162
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J17CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR), 500 W peak pulse power (10/1000 μs), clamping voltage of 27.6 V at 18.1 A, and operates from −55 °C to +150 °C. It is used to protect automotive sensor interfaces and industrial I/O lines against ESD and load dump transients.
For engineers reviewing the SMA5J17CAHM3/I datasheet, SMA5J17CAHM3/I pinout, SMA5J17CAHM3/I application, or SMA5J17CAHM3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 80 °C/W), junction capacitance behavior, and real-world design implications for PCB layout and clamping margin calculation.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its symmetrical clamping characteristic ensures identical protection in both polarities, with no polarity marking required on the SMA package.
Rated for 500 W peak pulse power under 10/1000 μs waveform and derated above 25 °C per Fig. 2, it supports robust operation up to 150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and is halogen-free and RoHS-compliant per HM3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets upper limit for protected line DC bias. |
| VBR (min/max) | 18.9 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; defines onset of clamping action. |
| VC @ IPPM | 27.6 V - Clamped voltage at 18.1 A peak pulse current; determines maximum stress imposed on downstream ICs. |
| PPPM | 500 W - Peak pulse power handling capability under standard 10/1000 μs waveform; defines surge energy absorption capacity. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance on minimum pad layout; informs heatsinking requirements for repeated surges. |
| TJ max. | +150 °C - Maximum allowable junction temperature; constrains ambient operating range and duty cycle in high-temp environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), cathode band absent per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping enables placement without orientation concern on AC or floating lines. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; copper pad layout per datasheet Fig. 4 required for rated RθJA. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity constraints. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC specification. |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates; eliminates brominated flame retardants while maintaining UL 94 V-0 rating. |
| Low RθJL = 25 °C/W | Supports efficient heat transfer to PCB copper pads, enabling sustained surge handling in compact industrial control modules. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensor outputs exposed to inductive switching noise and battery load dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning amplifier. Use Value: Withstands 500 W surges while limiting clamped voltage to 27.6 V, ensuring downstream op-amps remain below absolute maximum ratings during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding PLC analog input channels (4–20 mA) against field-wiring induced transients in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal line between terminal block and ADC front-end, operating in parallel with series current-limiting resistor. Use Value: Fast response (<1 ns) and symmetric clamping prevent latch-up in precision instrumentation amplifiers during repetitive 1 kV/μs fast-rising transients. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY magnetics secondary side from ESD and lightning-induced surges in PoE-powered access points. IC Role / Device Role / Timing Role: Secondary-side TVS across differential pair (MDI-X) to suppress common-mode transients coupled through transformer parasitics. Use Value: 27.6 V clamping voltage maintains margin below PHY IC's 30 V absolute maximum rating, even under worst-case 10/1000 μs surge conditions. |
Use Scenario: Input-stage surge suppression on 5 V USB-C power delivery circuits subjected to human-body-model ESD and AC-line coupling. IC Role / Device Role / Timing Role: First-line transient absorber placed after fuse and before primary-side controller IC on DC input rail. Use Value: 17 V VWM allows reliable operation across full 4.5–5.5 V USB PD tolerance window while clamping 8 kV contact ESD to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ17CA | Same VWM (17 V), identical SMA package, but rated for 400 W PPPM and higher VC (29.2 V at 17.1 A). | Lower power handling reduces margin in high-energy automotive load dump scenarios; suitable for consumer-grade ESD-only protection. | Select when cost sensitivity outweighs need for full 500 W surge margin and AEC-Q101 validation is not required. |
| ON Semiconductor SMA5J17CA | Identical electrical specs and AEC-Q101 qualification, but M3 suffix denotes halogen-free compliance only-lacks HM3's dual halogen-free + AEC-Q101 combined coding. | No functional difference in circuit performance; distinction lies solely in material compliance documentation and traceability for Tier 1 automotive procurement. | Choose SMA5J17CAHM3/I when full HM3 certification (halogen-free + AEC-Q101) is mandated by OEM sourcing requirements. |
Compared with SMAJ17CA and SMA5J17CA, the SMA5J17CAHM3/I delivers verified 500 W surge capability, lower clamping voltage, and consolidated HM3 compliance-making it optimal for safety-critical automotive and industrial designs requiring auditable material and reliability credentials.
Availability
SMA5J17CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom infrastructure equipment requiring stable component supply with guaranteed AEC-Q101 qualification and halogen-free compliance.
Supply support for SMA5J17CAHM3/I 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, MOSFETs, and protection devices with emphasis on high-reliability, high-power-density solutions.
The SMA5J series is engineered specifically for high-energy transient suppression in automotive, industrial, and telecom applications where compact size, AEC-Q101 validation, and consistent clamping performance are critical.
FAQ
What does the "HM3" suffix mean in SMA5J17CAHM3/I?
The HM3 suffix in SMA5J17CAHM3/I indicates halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It distinguishes this variant from commercial-grade M3 (halogen-free only) or E3 (RoHS only) versions, confirming compliance with automotive reliability standards and environmental regulations simultaneously.
Is SMA5J17CAHM3/I unidirectional or bidirectional?
SMA5J17CAHM3/I is a bidirectional transient voltage suppressor, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping in both polarities, requires no polarity marking on the SMA package, and is suitable for AC signal lines, differential buses, and floating power rails.
What is the clamping voltage of SMA5J17CAHM3/I at its rated peak pulse current?
The clamping voltage (VC) of SMA5J17CAHM3/I is 27.6 V at its peak pulse current (IPPM) of 18.1 A, measured under the standard 10/1000 μs waveform. This value defines the maximum voltage imposed on protected circuitry during a full-rated surge event.
Does SMA5J17CAHM3/I require special PCB layout considerations?
Yes - SMA5J17CAHM3/I must be mounted on the minimum recommended copper pad layout (0.2" × 0.2" per terminal) to achieve its specified RθJA of 80 °C/W and sustain 500 W peak pulse power. Reduced pad area increases thermal resistance and risks junction overheating during repeated surges.
How does SMA5J17CAHM3/I differ from SMA5J17A variants?
SMA5J17CAHM3/I is bidirectional (CA) and AEC-Q101 qualified (HM3), whereas SMA5J17A is unidirectional (A) and commercially rated. The CA version clamps equally in both directions and includes automotive-grade reliability testing; SMA5J17A has a cathode band and supports only forward-biased surge paths.
SMA5J17CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 18.1A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J17CAHM3/I FAQ
1.How can I place an order for SMA5J17CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J17CAHM3/I 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 SMA5J17CAHM3/I reliable?
The price and inventory of SMA5J17CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J17CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J17CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J17CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J17CAHM3/I?
SMA5J17CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J17CAHM3/I 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 SMA5J17CAHM3/I?
For technical support, including SMA5J17CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J17CAHM3/I requirements.
6.How does Aetrix verify that SMA5J17CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J17CAHM3/I 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 SMA5J17CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J17CAHM3/I?
All SMA5J17CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J17CAHM3/I, 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 SMA5J17CAHM3/I part is unused and in its original packaging.
Return procedure for SMA5J17CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J17CAHM3/I 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
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…
