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Vishay General Semiconductor - Diodes Division SMAJ64CAHE3/5A
- Part No.:
- SMAJ64CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CAHE3/5A.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,321
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Product details
Overview
SMAJ64CAHE3/5A 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 64 V standoff voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 3.9 A peak pulse current, and 400 W peak pulse power (10/1000 μs waveform). It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines against ESD and inductive switching transients in automotive and industrial systems.
For engineers reviewing the SMAJ64CAHE3/5A datasheet, SMAJ64CAHE3/5A pinout, SMAJ64CAHE3/5A application, or SMAJ64CAHE3/5A equivalent, key selection criteria include bidirectional clamping behavior, 103 V clamping voltage at rated surge current, AEC-Q101 qualification status, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, delivering identical clamping performance regardless of transient polarity-critical for protecting AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ns), while the low incremental surge resistance enables effective energy diversion during 8.3 ms surges up to 40 A (IFSM).
The device is rated for continuous operation from –55 °C to +150 °C junction temperature, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable performance under sustained power dissipation of 3.3 W on infinite heatsink at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 103 V at 3.9 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream components. |
| PPPM | 400 W - Peak pulse power handling (10/1000 μs); supports high-energy transients common in automotive load-dump events. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against short-duration overcurrents. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-ambient industrial settings. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.93 mm footprint; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and polarity-unmarked terminals (bidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; accepts reverse surge current during negative transients. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical PN junction; accepts reverse surge current during positive transients; no band marking per bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per AEC specification. |
| 400 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation when mounted on 5.0 mm × 5.0 mm copper pads. |
| Glass passivated junction | Ensures stable leakage current (<1.0 μA at 64 V) and long-term parameter stability under thermal and humidity stress. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH; supports standard SMT assembly without baking or dry-pack requirements. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 suffix adds halogen-free molding compound for stringent environmental compliance programs. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail and ground, absorbing >400 W surge energy within nanoseconds. Use Value: Limits rail voltage to ≤103 V during 3.9 A surge, preventing latch-up or permanent damage to downstream LDOs and microcontrollers. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) and digital I/O (CAN, LIN) in PLC analog input modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) shunt protector placed at connector entry point, clamping both polarities of induced lightning or EFT noise. Use Value: Maintains signal integrity by clamping transients before they reach precision op-amps or ADC front-ends, with <1.0 μA leakage preserving measurement accuracy. |
| Consumer Device USB Port Protection | Telecom Equipment DC Power Input |
Use Scenario: Shielding USB 2.0 data lines and VBUS supply in portable chargers and docking stations from ESD (IEC 61000-4-2 ±15 kV contact) and hot-plug overshoot. IC Role / Device Role / Timing Role: Fast-response (sub-ns) bidirectional TVS placed adjacent to USB connector, providing dual-rail protection without polarity sensitivity. Use Value: Clamps ESD events to <103 V within 1 ns, preventing gate oxide rupture in USB transceivers and maintaining USB-IF compliance. | Use Scenario: Protecting primary DC input (e.g., 48 V telecom power) of remote radio units and base station controllers against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage shunt protector in multi-stage architecture, diverting bulk surge energy before downstream MOVs or GDTs. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, enabling reliable operation in harsh outdoor environments without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA-E3/5A | Same electrical specs and package; commercial-grade (non-AEC-Q101), RoHS-compliant only. | Lacks automotive qualification; suitable for consumer/industrial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification requirements and full temperature range validation is not needed. |
| SMAJ64CAHM3/5A | Identical ratings and AEC-Q101 qualification; halogen-free molding compound instead of standard RoHS-compliant compound. | Required for strict environmental compliance programs (e.g., EU Green Procurement, Apple MRSL) mandating halogen-free materials. | Choose when halogen-free certification is contractually required and full AEC-Q101 validation must be retained. |
Compared with SMAJ64CAHE3/5A, the E3/5A variant offers identical protection performance at lower cost but lacks automotive qualification, while the HM3/5A variant adds halogen-free compliance without sacrificing AEC-Q101 or electrical behavior-enabling precise material-level alignment with sustainability mandates.
Availability
SMAJ64CAHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, consumer USB power delivery systems, and telecom DC input protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ64CAHE3/5A 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 specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure, combining rugged packaging, AEC-Q101 validation, and tightly controlled clamping parameters to ensure system-level EMC robustness.
FAQ
What is the clamping voltage of SMAJ64CAHE3/5A at its rated peak pulse current?
The SMAJ64CAHE3/5A has a maximum clamping voltage (VC) of 103 V at its rated peak pulse current (IPPM) of 3.9 A, measured using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ64CAHE3/5A maintains this clamping performance consistently due to its glass-passivated junction and low dynamic impedance.
Is SMAJ64CAHE3/5A suitable for automotive applications?
Yes, SMAJ64CAHE3/5A is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS sensors. Its qualification covers temperature cycling, high-temperature reverse bias, and mechanical shock testing per AEC standards. The HE3 suffix confirms RoHS compliance and automotive qualification, making SMAJ64CAHE3/5A appropriate for under-hood and cabin applications where reliability under thermal and vibration stress is mandatory.
How does the bidirectional configuration of SMAJ64CAHE3/5A affect its circuit implementation?
The bidirectional configuration of SMAJ64CAHE3/5A means it functions identically for both positive and negative transients, eliminating polarity concerns during layout and enabling direct placement across any two nodes requiring symmetrical overvoltage protection-such as differential signal pairs or AC-coupled power rails. Unlike unidirectional TVS diodes, SMAJ64CAHE3/5A has no cathode marking and requires no orientation verification during SMT assembly, reducing manufacturing error risk and simplifying board design for balanced protection schemes.
What is the thermal resistance of SMAJ64CAHE3/5A, and how does it impact PCB layout?
SMAJ64CAHE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values assume mounting on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under continuous 3.3 W power dissipation, designers must provide adequate copper area and avoid excessive trace length between device terminals and thermal planes. The SMAJ64CAHE3/5A's low RθJL also supports efficient heat transfer to solder joints and internal PCB layers.
Does SMAJ64CAHE3/5A meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ64CAHE3/5A meets J-STD-020 MSL Level 1, meaning it has unlimited floor life at ≤30 °C and ≤60 % relative humidity and can withstand standard lead-free reflow profiles (peak temperature up to 260 °C) without preconditioning or baking. This eliminates handling constraints in high-volume SMT lines and ensures consistent solder joint integrity. The device's matte tin plating also complies with J-STD-002 and JESD 22-B102 for solderability and whisker resistance.
SMAJ64CAHE3/5A 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SMAJ64CAHE3/5A FAQ
1.How can I place an order for SMAJ64CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CAHE3/5A 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 SMAJ64CAHE3/5A reliable?
The price and inventory of SMAJ64CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ64CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ64CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CAHE3/5A?
SMAJ64CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CAHE3/5A 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 SMAJ64CAHE3/5A?
For technical support, including SMAJ64CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ64CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ64CAHE3/5A 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 SMAJ64CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ64CAHE3/5A?
All SMAJ64CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CAHE3/5A, 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 SMAJ64CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ64CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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