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Vishay General Semiconductor - Diodes Division SMAJ150CAHE3_A/H
- Part No.:
- SMAJ150CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CAHE3_A/H.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,760
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Product details
Overview
SMAJ150CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 150 V standoff voltage (VWM), 167–185 V breakdown voltage (VBR) at 1 mA, 243 V maximum clamping voltage (VC) at 1.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - suitable for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive and industrial systems.
For engineers reviewing the SMAJ150CAHE3_A/H datasheet, SMAJ150CAHE3_A/H pinout, SMAJ150CAHE3_A/H application, or SMAJ150CAHE3_A/H equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast sub-nanosecond response time, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge protection in harsh environments.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the SMA package enables automated SMT placement and meets UL 94 V-0 flammability requirements.
The device is rated for 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). It supports operating junction temperatures from –55 °C to +150 °C and withstands 40 A non-repetitive forward surge current (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 150 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 167–185 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 243 V at IPPM = 1.2 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - Surge energy handling capability under standardized 10/1000 μs waveform; defines transient immunity level. |
| IFSM (Surge Current) | 40 A (8.3 ms half-sine) - Single-event forward surge rating; validates robustness against inrush or load-dump events in automotive applications. |
| TJmax | +150 °C - Maximum allowable junction temperature; enables operation in under-hood or industrial ambient conditions. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve as interchangeable surge conduction paths; no cathode band - enables bidirectional clamping without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - supports under-hood and ADAS module deployment. |
| 400 W peak pulse power (10/1000 μs) | Provides industry-standard surge immunity per IEC 61000-4-5 Level 4 (4 kV) when properly laid out - reduces need for additional protection stages. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients - protects 150 V-rated components with tight safety margins. |
| MSL Level 1, LF peak 260 °C | Enables single-pass lead-free reflow without baking or special handling - simplifies manufacturing for high-volume PCB assembly. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 μA) over lifetime - critical for low-power sensor interfaces and battery-backed systems. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 12 V/24 V power rails in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±100 V transients without polarity dependence. Use Value: Prevents latch-up or destruction of PMICs and microcontrollers during ISO 7637-2 pulse 5a/b events. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) in factory automation sensors from EFT and surge coupling. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting transient voltage to <243 V within nanoseconds. Use Value: Maintains signal integrity and avoids false triggering in PLC input stages exposed to motor drive noise. |
| Telecom Interface Ports | Consumer Device USB/Display Interfaces |
|
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary line-side TVS suppressing common-mode transients up to 300 W. Use Value: Eliminates need for gas discharge tubes or multi-stage protection - reduces BOM count and board space. |
Use Scenario: Protecting HDMI or USB 2.0 data lanes in smart TVs and set-top boxes from human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional clamp minimizing signal distortion. Use Value: Preserves signal rise/fall times while meeting IEC 61000-4-2 Level 4 (±8 kV contact) compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150CA-M3 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in protection performance; selected where halogen-free material compliance is mandated. | Choose SMAJ150CA-M3 if environmental compliance requires halogen-free packaging - same layout and reliability. |
| SMBJ150CAHE3_A/H | Same VWM/VBR/VC, but SMB (DO-214AA) package - 20 % larger footprint, higher thermal mass (RθJA = 85 °C/W). | Better power dissipation in high-duty-cycle surge environments; less suitable for ultra-dense layouts. | Choose SMBJ150CAHE3_A/H only when board space allows and thermal derating demands lower RθJA. |
Compared with SMAJ150CAHE3_A/H, the SMAJ150CA-M3 offers identical protection with halogen-free materials, while SMBJ150CAHE3_A/H trades compactness for improved thermal performance - selection depends strictly on footprint constraints and material compliance requirements, not functional equivalence.
Availability
SMAJ150CAHE3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor protection, telecom interface hardening, and consumer display interface safeguarding requiring stable component supply across production lifecycles.
Supply support for SMAJ150CAHE3_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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for board-level transient suppression in harsh environments - emphasizing AEC-Q101 qualification, stable clamping, and SMT manufacturability for mission-critical electronics.
FAQ
What is the clamping voltage of SMAJ150CAHE3_A/H at its rated peak pulse current?
The SMAJ150CAHE3_A/H has a maximum clamping voltage (VC) of 243 V at 1.2 A peak pulse current (IPPM) under the 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs rated for ≤250 V remain within safe operating limits. The SMAJ150CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMAJ150CAHE3_A/H suitable for automotive applications?
Yes, SMAJ150CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101 qualified construction. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS sensor modules. The SMAJ150CAHE3_A/H is validated for operation from –55 °C to +150 °C junction temperature.
What does the "CA" suffix mean in SMAJ150CAHE3_A/H?
The "CA" suffix in SMAJ150CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMAJ150A), the SMAJ150CAHE3_A/H has no cathode marking and functions identically in either polarity, enabling simplified layout and eliminating orientation errors during automated placement.
How does SMAJ150CAHE3_A/H differ from SMAJ150AHE3_A/H?
SMAJ150CAHE3_A/H is bidirectional with symmetrical clamping in both polarities, while SMAJ150AHE3_A/H is unidirectional - featuring a cathode band and conducting only in reverse bias. The unidirectional version exhibits forward voltage drop (~3.5 V at 25 A) and is unsuitable for AC or bipolar signal protection. For applications requiring protection on AC-coupled lines or differential buses, SMAJ150CAHE3_A/H is mandatory - SMAJ150AHE3_A/H cannot substitute without circuit redesign.
What is the maximum operating temperature for SMAJ150CAHE3_A/H?
The SMAJ150CAHE3_A/H has a maximum junction temperature (TJmax) of +150 °C and an operating storage temperature range of –55 °C to +150 °C. This rating enables reliable deployment in under-hood automotive environments, industrial motor drives, and outdoor telecom equipment. Thermal design must account for RθJA = 120 °C/W and ensure PCB copper pad area (minimum 0.2" × 0.2") to maintain safe junction temperatures during repetitive surge events.
SMAJ150CAHE3_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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 1.2A
- Power - Peak Pulse:
- 300W
- 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)
SMAJ150CAHE3_A/H FAQ
1.How can I place an order for SMAJ150CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CAHE3_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 SMAJ150CAHE3_A/H reliable?
The price and inventory of SMAJ150CAHE3_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 SMAJ150CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ150CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CAHE3_A/H?
SMAJ150CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CAHE3_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 SMAJ150CAHE3_A/H?
For technical support, including SMAJ150CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ150CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ150CAHE3_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 SMAJ150CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ150CAHE3_A/H?
All SMAJ150CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CAHE3_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 SMAJ150CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ150CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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