My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ10CAHM3/I
- Part No.:
- SMAJ10CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10CAHM3/I.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,036
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ10CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 10 V standoff voltage (VWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 23.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the SMAJ10CAHM3/I datasheet, SMAJ10CAHM3/I pinout, SMAJ10CAHM3/I application, or SMAJ10CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, low thermal resistance (RθJL = 30 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior for positive and negative transients.
It is rated for repetitive 10/1000 μs surges at 0.01% duty cycle (400 W ≤78 V; 300 W >78 V), with thermal derating above 25 °C ambient per Fig. 2. Junction temperature is limited to 150 °C, and it meets J-STD-020 MSL Level 1 with peak reflow of 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 11.1 V / 12.3 V at IT = 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 17.0 V at 23.5 A - Clamped voltage seen by protected circuit during full-rated 400 W transient; limits stress on downstream components. |
| PPPM | 400 W (10/1000 μs) - Peak surge energy handling capacity; determines survivability against common switching/lightning-induced transients. |
| IFSM | 40 A (8.3 ms half-sine) - Surge current rating for unidirectional devices; not applicable here due to bidirectional configuration. |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal design boundary for PCB pad layout and power cycling. |
| RθJL | 30 °C/W - Junction-to-lead thermal resistance; enables accurate thermal modeling when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve identically as surge current entry/exit points; no cathode band marking required for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - suitable for under-hood and ADAS applications. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern electronics manufacturing without compromising electrical performance or thermal robustness. |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against common ESD, load dump, and inductive switching transients in 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes voltage overshoot during clamping - critical for safeguarding 3.3 V or 5 V logic interfaces and analog sensor front-ends. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus or CAN FD power rails from load-dump transients up to 35 V in vehicle body control modules. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly across supply rail input to clamp spikes before reaching LDOs or microcontrollers. Use Value: Limits rail voltage to ≤17.0 V during 23.5 A surge, preventing latch-up or permanent damage to 5 V tolerant interface ICs. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA or 0–10 V) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across signal pair to suppress EFT bursts and cable-coupled noise. Use Value: Maintains signal integrity by clamping ±17.0 V transients while adding <1 pF junction capacitance at VWM, avoiding bandwidth degradation. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Standoff-limited clamping device positioned after primary polymer PTC, absorbing residual 8 kV HBM surges. Use Value: Responds in <1 ps to clamp fast-rising ESD events while sustaining 400 W peak power - prevents gate oxide rupture in USB switch ICs. |
Use Scenario: Primary surge protection on twisted-pair DSL lines exposed to lightning-induced surges in residential gateway modems. IC Role / Device Role / Timing Role: Bidirectional shunt protector installed line-to-line and line-to-ground to divert common-mode and differential-mode surges. Use Value: Handles repetitive 10/1000 μs surges up to 400 W without degradation, meeting ITU-T K.21 basic protection requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10CAHE3/I | Same electrical specs, but RoHS-compliant without halogen-free certification; uses standard SnPb-free matte tin plating. | Lacks halogen-free material declaration; acceptable for commercial but not automotive or green-certified industrial programs. | Select SMAJ10CAHE3/I only if halogen-free compliance is not mandated by end-product environmental policy. |
| SMBJ10CAHM3/I | Same VWM, VBR, and VC, but SMB (DO-214AA) package - 29% larger footprint and 20% higher RθJA (140 °C/W vs. 120 °C/W). | Better surge energy margin (600 W) at cost of PCB area; suited for high-reliability industrial power supplies where layout space permits. | Choose SMBJ10CAHM3/I when higher peak power handling is prioritized over miniaturization and thermal efficiency. |
Compared with SMAJ10CAHM3/I, SMAJ10CAHE3/I trades halogen-free status for broader commercial availability, while SMBJ10CAHM3/I offers greater surge robustness in a larger package - making SMAJ10CAHM3/I optimal for space-constrained, automotive-qualified designs requiring strict material compliance.
Availability
SMAJ10CAHM3/I is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, consumer USB peripherals, and telecom DSL line cards requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMAJ10CAHM3/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, precision, and application-specific optimization.
The SMAJ series is engineered for high-speed transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability under thermal cycling are critical.
FAQ
What does the 'HM3' suffix indicate in SMAJ10CAHM3/I?
The 'HM3' suffix in SMAJ10CAHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms the device meets automotive reliability standards and environmental regulations, including JESD201 Class 2 whisker resistance and MSL Level 1 reflow capability - essential for use in qualified automotive ECUs and ADAS modules.
Is SMAJ10CAHM3/I unidirectional or bidirectional, and how does that affect circuit placement?
SMAJ10CAHM3/I is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike unidirectional variants (e.g., SMAJ10A), it has no cathode band marking and can be placed in either orientation across a differential line or supply rail - simplifying layout and eliminating orientation errors during automated assembly.
What is the maximum clamping voltage of SMAJ10CAHM3/I, and under what test condition is it specified?
The maximum clamping voltage of SMAJ10CAHM3/I is 17.0 V, measured at a peak pulse current (IPPM) of 23.5 A using the standardized 10/1000 μs double-exponential waveform. This value represents the highest voltage imposed on protected circuitry during a full-rated 400 W transient event, directly informing system-level overvoltage margin analysis.
Can SMAJ10CAHM3/I be used in place of SMAJ10A in an existing design?
No - SMAJ10CAHM3/I is bidirectional while SMAJ10A is unidirectional, so direct substitution requires verification of circuit topology. SMAJ10A includes a cathode band for polarity-sensitive placement and conducts forward current; SMAJ10CAHM3/I has no polarity marking and blocks in both directions until breakdown. Replacing one with the other may cause unintended conduction or failure to clamp correctly.
Does SMAJ10CAHM3/I meet UL recognition requirements for surge protection devices?
Yes - SMAJ10CAHM3/I carries Underwriters Laboratory Recognition under UL 497B (QVGQ2) for protector classification, with file number E136766. This certification validates its suitability for use in safety-critical surge protection circuits in North American markets, including telecom and industrial equipment requiring third-party safety approval.
SMAJ10CAHM3/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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 23.5A
- 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)
SMAJ10CAHM3/I FAQ
1.How can I place an order for SMAJ10CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10CAHM3/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 SMAJ10CAHM3/I reliable?
The price and inventory of SMAJ10CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ10CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10CAHM3/I?
SMAJ10CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10CAHM3/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 SMAJ10CAHM3/I?
For technical support, including SMAJ10CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10CAHM3/I requirements.
6.How does Aetrix verify that SMAJ10CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ10CAHM3/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 SMAJ10CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ10CAHM3/I?
All SMAJ10CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10CAHM3/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 SMAJ10CAHM3/I part is unused and in its original packaging.
Return procedure for SMAJ10CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ10CAHM3/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 …
