My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ15CAHE3_A/H
- Part No.:
- SMAJ15CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CAHE3_A/H.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,871
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ15CAHE3_A/H 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 and power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 16.4 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 SMAJ15CAHE3_A/H datasheet, SMAJ15CAHE3_A/H pinout, SMAJ15CAHE3_A/H application, or SMAJ15CAHE3_A/H equivalent, key selection criteria include bidirectional surge suppression capability, AEC-Q101 qualification for automotive use, low clamping ratio (VC/VWM = 1.63), and compatibility with automated SMT placement on PCBs with standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction enables fast response time (<1.0 ns) and stable performance under repetitive transient stress.
The SMAJ15CAHE3_A/H delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation in ambient temperatures from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 16.7–18.5 V at 1 mA - Confirmed minimum/maximum breakdown range; ensures consistent turn-on across production lots. |
| VC (Clamping Voltage) | 24.4 V at IPPM = 16.4 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines safe voltage headroom for downstream components. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - Surge energy handling capacity per single transient event under standardized waveform. |
| ID (Max Reverse Leakage) | 1.0 μA at VWM - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating enabling use in under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability requirements. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts equally in either direction when V > VBR - eliminates orientation concerns during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 400 W peak pulse power (10/1000 μs) | Handles common lightning-induced and inductive-switching surges in automotive CAN/LIN and industrial I/O interfaces. |
| AEC-Q101 qualified (HE3 suffix) | Meets automotive reliability requirements for engine control units, body electronics, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage stress on protected ICs compared to alternatives with higher ratios (e.g., >1.8). |
| MSL Level 1 (JEDEC J-STD-020) | Allows unlimited floor life and reflow at peak temperature up to 260 °C - compatible with standard lead-free assembly processes. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage clamping TVS placed directly at connector interface to shunt transients before reaching ADC front-end or signal conditioner. Use Value: Prevents latch-up or permanent damage to precision op-amps and SAR ADCs by limiting input voltage to ≤24.4 V during 10/1000 μs surges. |
Use Scenario: Safeguarding digital input channels on programmable logic controller (PLC) modules connected to 24 V DC field wiring. IC Role / Device Role / Timing Role: Bidirectional transient suppressor installed across input terminals to absorb inductive kickback from solenoid/relay coils. Use Value: Eliminates need for separate unidirectional devices per line; maintains signal integrity during repeated switching cycles with <1 ns response. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Secondary-level surge protection for USB 2.0 data lines (D+/D−) in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF at VWM) placed after primary ESD array to handle higher-energy transients. Use Value: Clamps ±15 kV contact ESD events per IEC 61000-4-2 while preserving signal rise/fall times due to minimal parasitic capacitance. |
Use Scenario: Protecting RS-485 transceiver inputs in base station remote radio units subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge clamp on differential bus lines, mounted adjacent to connector to minimize trace inductance. Use Value: Withstands 400 W 10/1000 μs surges per line pair while maintaining common-mode rejection via matched bidirectional clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA-M3 | Halogen-free, RoHS-compliant, commercial-grade variant - lacks AEC-Q101 qualification. | Suitable for non-automotive industrial or consumer applications where automotive reliability testing is not required. | Select when cost sensitivity outweighs automotive qualification needs and halogen-free compliance is mandated. |
| SMBJ15CAHE3_A/H | Same electrical specs but in larger SMB (DO-214AA) package - higher thermal mass and 600 W PPPM rating. | Better suited for high-repetition-rate surge environments or designs requiring enhanced thermal dissipation without layout change. | Choose when board space allows larger footprint and system-level surge testing exceeds 400 W single-event limits. |
Compared with SMAJ15CA-M3 and SMBJ15CAHE3_A/H, the SMAJ15CAHE3_A/H uniquely balances AEC-Q101 qualification, compact SMA footprint, and verified 400 W surge capability - making it optimal for space-constrained automotive ECUs and industrial edge controllers requiring certified reliability.
Availability
SMAJ15CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface designs requiring stable component supply with guaranteed AEC-Q101 compliance and full traceability.
Supply support for SMAJ15CAHE3_A/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where voltage spikes threaten signal integrity and component longevity.
FAQ
What is the clamping voltage of SMAJ15CAHE3_A/H at its rated peak pulse current?
The SMAJ15CAHE3_A/H has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 16.4 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures predictable overvoltage limiting for protected circuits. The clamping performance is validated across the full operating temperature range of –55 °C to +150 °C.
Is SMAJ15CAHE3_A/H suitable for automotive applications?
Yes, SMAJ15CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88390. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD validation - making it appropriate for engine control units, body control modules, and ADAS sensor interfaces where automotive-grade reliability is mandatory.
How does the bidirectional design of SMAJ15CAHE3_A/H affect PCB layout?
The bidirectional design of SMAJ15CAHE3_A/H eliminates polarity marking and orientation dependency - both terminals are functionally identical. This simplifies PCB layout by removing the need for silkscreen polarity indicators or directional placement checks during automated assembly. Layout best practice remains mounting on 0.2" × 0.2" copper pads per terminal to maintain specified thermal and surge performance.
What is the maximum reverse leakage current for SMAJ15CAHE3_A/H at its stand-off voltage?
The SMAJ15CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 15 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage supports high-impedance analog sensing paths and battery-powered systems where quiescent current must be minimized without compromising transient suppression capability.
Does SMAJ15CAHE3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ15CAHE3_A/H meets MSL Level 1 per JEDEC J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows indefinite floor life and compatibility with standard lead-free soldering profiles without dry-pack or baking requirements - streamlining manufacturing for high-volume SMT lines.
SMAJ15CAHE3_A/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ15CAHE3_A/H FAQ
1.How can I place an order for SMAJ15CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CAHE3_A/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 SMAJ15CAHE3_A/H reliable?
The price and inventory of SMAJ15CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ15CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CAHE3_A/H?
SMAJ15CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CAHE3_A/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 SMAJ15CAHE3_A/H?
For technical support, including SMAJ15CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ15CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ15CAHE3_A/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 SMAJ15CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ15CAHE3_A/H?
All SMAJ15CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CAHE3_A/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 SMAJ15CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ15CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CAHE3_A/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 …
