My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ17CAHM3_A/I
- Part No.:
- SMAJ17CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17CAHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,160
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ17CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 17 V standoff voltage (VWM), 19.9 V minimum breakdown voltage (VBR), 27.6 V maximum clamping voltage (VC) at 14.5 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ17CAHM3_A/I datasheet, SMAJ17CAHM3_A/I pinout, SMAJ17CAHM3_A/I application, or SMAJ17CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and inductive switching spikes.
The SMAJ17CAHM3_A/I is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W up to 78 V; derated to 300 W above), with operating junction temperature range from –55 °C to +150 °C and MSL Level 1 moisture sensitivity per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min) | 19.9 V at 1 mA - guaranteed breakdown initiation point; ensures reliable turn-on during overvoltage events |
| VC (max) | 27.6 V at IPPM = 14.5 A - peak clamped voltage seen by protected circuit; determines stress on downstream components |
| PPPM | 400 W (10/1000 μs) - transient energy absorption capacity; supports robust protection against IEC 61000-4-5 surge events |
| ID (max) | 1.0 μA at VWM - ultra-low reverse leakage; minimizes standby power loss and avoids false triggering |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with standard reflow profiles |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration with no polarity marking; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Bidirectional terminal pair | No functional distinction between terminals; either side connects to protected line, other to ground or reference rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and body electronics |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for global OEM supply chains without compromising thermal or electrical performance |
| 400 W peak pulse power (≤78 V) | Supports single-event surge immunity up to IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) with appropriate PCB layout |
| Low RθJA = 120 °C/W | Enables thermal management on standard FR-4 with minimal copper area; reduces need for oversized heatsinking in space-constrained modules |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk during assembly |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤27.6 V, preventing damage to 3.3 V/5 V microcontrollers and CAN transceivers downstream. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 1 V) shunt protector on 0–5 V or 4–20 mA signal paths. Use Value: Sub-1 ns response preserves signal integrity while clamping ±15 kV contact ESD per IEC 61000-4-2. |
| Consumer USB Port Surge Suppression | Telecom DSL Line Interface Protection |
Use Scenario: Safeguarding USB 2.0 data lines (D+/D−) and VBUS against hot-plug surges and nearby lightning-induced coupling. IC Role / Device Role / Timing Role: Dual-channel bidirectional TVS array replacement using discrete SMAJ17CAHM3_A/I per line. Use Value: 27.6 V clamping prevents latch-up in USB PHY ICs while maintaining signal rise/fall times via low junction capacitance. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers exposed to induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary shunt suppressor across line-to-line and line-to-ground interfaces. Use Value: 400 W rating handles repeated 10/1000 μs surges per ITU-T K.20/K.21; bidirectional symmetry matches AC-coupled telecom signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CAHE3_A/I | Same electrical specs, but RoHS-compliant without halogen-free certification; not AEC-Q101 qualified | Limited to commercial-grade automotive infotainment or non-safety-critical industrial use | Select when halogen-free requirement is waived and AEC-Q101 is unnecessary |
| SMBJ17CAHM3_A/I | Same VWM/VBR/VC ratings, but SMB (DO-214AA) package - 20% larger footprint, lower RθJA (90 °C/W) | Better thermal performance for higher-duty-cycle surge environments; requires PCB redesign | Choose when sustained surge repetition or elevated ambient temperatures demand improved heat dissipation |
Compared with SMAJ17CAHE3_A/I, the SMAJ17CAHM3_A/I adds halogen-free compliance and AEC-Q101 qualification for harsher automotive deployments; versus SMBJ17CAHM3_A/I, it trades thermal margin for board space savings in compact modules where 120 °C/W RθJA suffices.
Availability
SMAJ17CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB interfaces, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ17CAHM3_A/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 reliability, efficiency, and application-specific optimization.
The SMAJ series targets cost-effective, high-reliability transient suppression in space-constrained surface-mount designs - engineered for automotive, industrial, and communications systems where robustness and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ17CAHM3_A/I at its rated peak pulse current?
The SMAJ17CAHM3_A/I has a maximum clamping voltage (VC) of 27.6 V at its specified peak pulse current (IPPM) of 14.5 A, measured with a 10/1000 μs waveform. This value ensures protected circuits experience no more than 27.6 V during transient events, making SMAJ17CAHM3_A/I suitable for safeguarding 3.3 V and 5 V logic interfaces without overstressing downstream components.
Is SMAJ17CAHM3_A/I qualified for automotive applications?
Yes, SMAJ17CAHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and documented in Vishay's ordering information table. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, confirming suitability for automotive powertrain, chassis, and body electronics where reliability under thermal and electrical stress is critical - a key differentiator of SMAJ17CAHM3_A/I over commercial-grade variants.
How does the HM3 suffix affect the environmental compliance of SMAJ17CAHM3_A/I?
The HM3 suffix denotes that SMAJ17CAHM3_A/I is both RoHS-compliant and halogen-free, meeting stringent environmental standards required by major automotive OEMs and EU directives. Unlike E3-suffixed parts, SMAJ17CAHM3_A/I contains no brominated flame retardants or chlorine-based compounds, ensuring safer end-of-life disposal and reduced corrosivity in humid operating environments - a verified specification confirmed in Vishay's mechanical data section.
What is the thermal resistance of SMAJ17CAHM3_A/I, and how does it impact PCB layout?
SMAJ17CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value implies that under 3.3 W steady-state dissipation, junction temperature rises ~400 °C above ambient - but since SMAJ17CAHM3_A/I is intended for transient (not continuous) operation, the critical design consideration is ensuring adequate copper area to handle short-duration 400 W pulses without localized overheating or pad delamination.
Can SMAJ17CAHM3_A/I be used in bidirectional AC signal protection?
Yes, SMAJ17CAHM3_A/I is explicitly designed for bidirectional applications, as confirmed by the "CA" suffix and electrical characteristics applying equally in both directions. Its symmetrical breakdown behavior (VBR min = 19.9 V, VBR max = 22.1 V) and absence of polarity marking make it ideal for protecting AC-coupled lines such as telecom DSL pairs, audio differential signals, or RS-485 buses - a core functional attribute of SMAJ17CAHM3_A/I validated across Vishay's primary characteristics table.
SMAJ17CAHM3_A/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:
- Active
- 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):
- 14.5A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ17CAHM3_A/I FAQ
1.How can I place an order for SMAJ17CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17CAHM3_A/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 SMAJ17CAHM3_A/I reliable?
The price and inventory of SMAJ17CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ17CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17CAHM3_A/I?
SMAJ17CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17CAHM3_A/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 SMAJ17CAHM3_A/I?
For technical support, including SMAJ17CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ17CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ17CAHM3_A/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 SMAJ17CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ17CAHM3_A/I?
All SMAJ17CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17CAHM3_A/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 SMAJ17CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ17CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17CAHM3_A/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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
