My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ9.0CAHM3/H
- Part No.:
- SMAJ9.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ9.0CAHM3/H.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,549
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ9.0CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features a 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, 15.4 V maximum clamping voltage (VC) at 26.0 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ9.0CAHM3/H datasheet, SMAJ9.0CAHM3/H pinout, SMAJ9.0CAHM3/H application, or SMAJ9.0CAHM3/H equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per Vishay HM3 suffix - critical for automotive-grade reliability and automated SMT assembly.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 9.0 V), but triggers into low-impedance conduction when transients exceed VBR, diverting surge energy to ground. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the bidirectional architecture eliminates polarity concerns in AC-coupled or differential signal paths.
The SMAJ9.0CAHM3/H is rated for 400 W peak pulse power (10/1000 μs) up to 78 V, derating to 300 W above that threshold; its thermal resistance (RθJA = 120 °C/W) and junction temperature range (−55 °C to +150 °C) support operation in harsh environments without active cooling - validated per JESD22-B102 solderability and J-STD-020 MSL Level 1 reflow profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 10.0 V / 11.1 V at 1 mA - guaranteed breakdown window defining turn-on threshold tolerance |
| VC @ IPPM | 15.4 V at 26.0 A - clamping voltage during full-rated surge, limiting downstream IC stress |
| PPPM | 400 W (10/1000 μs) - surge energy handling capacity compatible with IEC 61000-4-5 Level 4 |
| ID @ VWM | 5.0 μA - ultra-low leakage preserves signal integrity in high-impedance sensor circuits |
| TJ max. | +150 °C - enables deployment in under-hood automotive or industrial control cabinet environments |
| Package | SMA (DO-214AC) - surface-mount footprint with 5.0 mm × 5.0 mm copper pad thermal relief per JEDEC spec |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional configuration - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | AC-side connection point | Equal clamping behavior in both directions; connects to protected line (e.g., CAN_H or RS-485 A) |
| Cathode (Terminal 2) | AC-side connection point | Electrically identical to Terminal 1 in bidirectional mode; connects to same protected line or complementary line (e.g., CAN_L or RS-485 B) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without baking or special handling prior to assembly |
| 400 W peak pulse power | Withstands repeated 10/1000 μs surges per IEC 61000-4-5, enabling single-device protection for Class B/C interfaces |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage exposure to downstream logic - critical for 3.3 V or 5 V MCU I/O pins |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver I/O pins from load dump and ISO 7637-2 pulses in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between signal line and chassis ground, responding within <1 ns to transients exceeding 10 V. Use Value: Prevents latch-up or gate oxide damage in transceivers by limiting peak voltage to 15.4 V during 26 A surge events. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs against EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) suppressing common-mode transients while preserving signal integrity up to 10 Mbps. Use Value: Maintains bus uptime by absorbing 400 W surges without degradation - verified over 1000+ surge cycles per IEC 61000-4-4. |
| Consumer USB Port Protection | Smart Meter Power Line Communication |
|
Use Scenario: Clamping induced surges on USB 2.0 D+/D− lines caused by hot-plug ESD or nearby relay switching. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS (CJ ≈ 200 pF at 0 V) placed directly at connector, minimizing stub length. Use Value: Limits ESD voltage to <16 V during ±15 kV contact discharge (IEC 61000-4-2), preventing PHY corruption without signal attenuation. |
Use Scenario: Protecting PLC modem front-end circuitry from high-voltage transients coupled onto 230 V AC power lines in smart grid meters. IC Role / Device Role / Timing Role: Primary-stage surge limiter across line-to-line or line-to-neutral, coordinated with MOV and gas discharge tube stages. Use Value: Provides fast-response clamping (vs. slower MOVs) to prevent pre-triggering of secondary protection, extending system lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ9.0CAHE3/H | RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker resistance certification | Suitable for commercial-grade industrial controls where halogen-free requirement is absent | Select when cost sensitivity outweighs automotive or green-material mandates |
| SMBJ9.0CAHM3 | Same electrical specs but SMB (DO-214AA) package - 25 % larger footprint and 10 % higher RθJA (135 °C/W) | Better suited for lower-power applications or where board space permits larger thermal pad area | Choose when PCB layout allows SMB footprint and thermal margin exceeds 120 °C/W requirement |
Compared with SMAJ9.0CAHM3/H, the HE3/H variant trades halogen-free compliance for lower unit cost, while SMBJ9.0CAHM3 offers identical protection performance at the expense of reduced power density and thermal efficiency - making SMAJ9.0CAHM3/H optimal for space-constrained, AEC-Q101–mandated automotive designs.
Availability
SMAJ9.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication interface hardening, and smart meter surge resilience requiring stable component supply across multi-year production cycles.
Supply support for SMAJ9.0CAHM3/H 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 validation.
The SMAJ series targets board-level transient protection in automotive, industrial, and telecom systems - engineered for fast clamping, AEC-Q101 compliance, and seamless integration into automated SMT lines.
FAQ
What does the "HM3" suffix indicate in SMAJ9.0CAHM3/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance certification. SMAJ9.0CAHM3/H meets IPC-1752A material declarations and supports lead-free reflow up to 260 °C without preconditioning - essential for automotive Tier 1 suppliers and green-electronics initiatives. This distinguishes SMAJ9.0CAHM3/H from E3-suffixed variants.
Is SMAJ9.0CAHM3/H unidirectional or bidirectional?
SMAJ9.0CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" designation in its part number and absence of cathode band marking. It provides symmetrical clamping in both polarities - ideal for AC-coupled interfaces like RS-485, CAN, or audio lines - unlike unidirectional "A" variants which require correct polarity orientation during placement.
Does SMAJ9.0CAHM3/H meet AEC-Q101 qualification?
Yes, SMAJ9.0CAHM3/H is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet revision 09-Jan-2024 (Document Number: 88390). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - validating its use in automotive powertrain, chassis, and body electronics where reliability is mission-critical.
What is the maximum clamping voltage for SMAJ9.0CAHM3/H at rated surge current?
The maximum clamping voltage (VC) for SMAJ9.0CAHM3/H is 15.4 V at 26.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - ensuring compatibility with 3.3 V and 5 V logic families.
Can SMAJ9.0CAHM3/H be used in place of SMAJ9.0A in a design?
No - SMAJ9.0CAHM3/H is bidirectional while SMAJ9.0A is unidirectional; substituting them requires verifying circuit polarity and clamping symmetry. SMAJ9.0A has a cathode band and conducts only in reverse bias, whereas SMAJ9.0CAHM3/H clamps equally in both directions. Using SMAJ9.0CAHM3/H in a unidirectional layout may cause unintended conduction or elevated leakage.
SMAJ9.0CAHM3/H 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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)
SMAJ9.0CAHM3/H FAQ
1.How can I place an order for SMAJ9.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ9.0CAHM3/H 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 SMAJ9.0CAHM3/H reliable?
The price and inventory of SMAJ9.0CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ9.0CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ9.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ9.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ9.0CAHM3/H?
SMAJ9.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ9.0CAHM3/H 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 SMAJ9.0CAHM3/H?
For technical support, including SMAJ9.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ9.0CAHM3/H requirements.
6.How does Aetrix verify that SMAJ9.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ9.0CAHM3/H 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 SMAJ9.0CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ9.0CAHM3/H?
All SMAJ9.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ9.0CAHM3/H, 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 SMAJ9.0CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ9.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ9.0CAHM3/H 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 …
