My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ64CA-M3/61
- Part No.:
- SMAJ64CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ64CA-M3/61.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,448
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ64CA-M3/61 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 power and signal lines. It features a 64 V stand-off 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 rating (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMAJ64CA-M3/61 datasheet, SMAJ64CA-M3/61 pinout, SMAJ64CA-M3/61 application, or SMAJ64CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, 150 °C max junction temperature, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports fast energy dissipation during ESD or lightning-induced surges.
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) on standard 0.2" × 0.2" copper pads. It meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes - though SMAJ64CA-M3/61 itself is commercial-grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V or 60 V DC systems. |
| VBR min/max | 71.1 V / 78.6 V at 1 mA - Confirmed breakdown range ensures reliable turn-on within specification across process variation and temperature. |
| VC @ IPPM | 103 V at 3.9 A - Clamping voltage under 10/1000 μs surge; limits downstream voltage stress to ≤103 V during transient events. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak surge power handling capacity determines survivability against IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); relevant for unidirectional variants only - not applicable to SMAJ64CA-M3/61. |
| TJ max | +150 °C - Maximum junction temperature enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with JEDEC MS-013. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional devices; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Acts as cathode in one polarity direction and anode in the other; symmetrical conduction enables AC line protection without orientation constraints. |
| Cathode | Transient current exit point (bidirectional) | Electrically identical to Anode terminal in CA configuration; terminals are interchangeable - no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of differential, AC, or floating nodes (e.g., RS-485, CAN bus, sensor bridges) without polarity-sensitive layout. |
| 400 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/500 A open-circuit voltage/current on 2 Ω source impedance. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage exposure to protected ICs - e.g., clamps to 103 V while breaking down at ~77 V - reducing risk of latch-up or gate oxide damage. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances in electronics manufacturing. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without baking or special handling; eliminates moisture-related popcorning risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs, body control modules, and lighting drivers from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VIN and GND to clamp spikes up to ±100 V before they reach LDOs or microcontrollers. Use Value: Limits voltage excursion to ≤103 V during 400 W surges, preventing brownout resets and permanent damage to 5 V/3.3 V logic supplies. |
Use Scenario: Shielding analog front-ends of pressure, temperature, or position sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Placed differential-mode across sensor output lines (e.g., 0–10 V or 4–20 mA) to suppress EFT bursts and inductive kickback. Use Value: Maintains signal integrity by clamping transients within 1 ns response time, avoiding ADC saturation or false triggering in PLC input modules. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
|
Use Scenario: Safeguarding Ethernet PHYs, PoE injectors, and DSL line drivers against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Used in conjunction with common-mode chokes and gas discharge tubes as part of a multi-stage telecom surge protection circuit. Use Value: Absorbs up to 400 W of differential-mode surge energy per line pair, reducing let-through voltage to <110 V for secondary protection stage coordination. |
Use Scenario: Adding robustness to USB 2.0 Type-A ports on smart displays, set-top boxes, and gaming peripherals exposed to user-handling ESD. IC Role / Device Role / Timing Role: Mounted on VBUS and D+/D− lines to shunt ±15 kV contact ESD (IEC 61000-4-2) away from USB transceivers. Use Value: Achieves <1 μA leakage at 64 V, preserving USB suspend current budget while clamping ESD pulses to <103 V in <1 ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-M3/61 | Unidirectional variant; cathode-marked; 1.0 μA max leakage at VWM; same VBR, VC, and PPPM. | Requires correct polarity placement; suitable only for DC-biased lines like 12 V/24 V supply rails with defined ground reference. | Select SMAJ64A-M3/61 only when protecting single-ended, grounded systems where polarity is fixed and lower leakage is critical. |
| SMBJ64CA-M3/61 | Same electrical specs but in larger SMB (DO-214AA) package; 600 W PPPM; RθJA = 80 °C/W vs. 120 °C/W. | Higher power handling and better thermal performance; requires larger PCB footprint (4.6 × 3.6 mm vs. 4.5 × 2.3 mm). | Choose SMBJ64CA-M3/61 when system-level surge testing exceeds 400 W or ambient temperatures exceed 105 °C with limited airflow. |
Compared with SMAJ64CA-M3/61, SMAJ64A-M3/61 offers polarity-specific clamping for simpler DC rail designs, while SMBJ64CA-M3/61 delivers higher surge robustness at the cost of board space - making SMAJ64CA-M3/61 optimal for compact, bidirectional, mid-power protection in automotive and industrial edge nodes.
Availability
SMAJ64CA-M3/61 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom data line surge suppression requiring stable component supply, halogen-free compliance, and MSL Level 1 reflow readiness.
Supply support for SMAJ64CA-M3/61 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and AEC-Q qualification.
The SMAJ series was developed for high-reliability transient suppression in space-constrained surface-mount applications across automotive, industrial, and communications infrastructure - balancing clamping performance, thermal robustness, and manufacturability.
FAQ
What is the clamping voltage of SMAJ64CA-M3/61 under a 10/1000 μs surge?
The SMAJ64CA-M3/61 has a maximum clamping voltage (VC) of 103 V at 3.9 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ64CA-M3/61 maintains this clamping performance across its specified operating temperature range and is validated with 0.2" × 0.2" copper pads per JEDEC test conditions.
Is SMAJ64CA-M3/61 suitable for automotive applications?
SMAJ64CA-M3/61 is qualified for commercial-grade automotive use but is not AEC-Q101 certified in this specific M3/61 configuration. For AEC-Q101 compliance, Vishay offers the SMAJ64CAHM3_X variant (e.g., SMAJ64CAHM3_A). The SMAJ64CA-M3/61 retains the same electrical characteristics - including 64 V VWM, 103 V VC, and 150 °C TJ max - and is widely deployed in non-safety-critical automotive subsystems such as infotainment power rails and body electronics where full qualification is not mandated.
Does SMAJ64CA-M3/61 have polarity markings on the package?
No, SMAJ64CA-M3/61 does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMAJ64A-M3/61), which use a cathode band to indicate terminal orientation, the CA suffix indicates symmetrical construction - meaning both terminals function identically regardless of applied voltage polarity. This eliminates orientation errors during automated placement and simplifies layout for AC or floating signal paths.
What is the leakage current specification for SMAJ64CA-M3/61 at its stand-off voltage?
At the 64 V stand-off voltage (VWM), SMAJ64CA-M3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, per Vishay's Electrical Characteristics table. This low leakage preserves power budget in always-on systems and avoids false triggering in high-impedance sensor interfaces. Leakage remains below 5 μA up to 125 °C, ensuring stable performance across extended industrial temperature ranges.
How does the SMA (DO-214AC) package of SMAJ64CA-M3/61 compare thermally to SMB (DO-214AA)?
The SMA (DO-214AC) package used in SMAJ64CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W on standard 0.2" × 0.2" copper pads, whereas the larger SMB (DO-214AA) package achieves ~80 °C/W. This means SMAJ64CA-M3/61 reaches higher junction temperatures under identical power dissipation - limiting its usable duty cycle in high-repetition surge environments. Engineers selecting SMAJ64CA-M3/61 should verify thermal margins using Vishay's Fig. 2 derating curves and confirm pad layout adherence to recommended dimensions.
SMAJ64CA-M3/61 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ64CA-M3/61 FAQ
1.How can I place an order for SMAJ64CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ64CA-M3/61 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 SMAJ64CA-M3/61 reliable?
The price and inventory of SMAJ64CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ64CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ64CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ64CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ64CA-M3/61?
SMAJ64CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ64CA-M3/61 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 SMAJ64CA-M3/61?
For technical support, including SMAJ64CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ64CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ64CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ64CA-M3/61 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 SMAJ64CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ64CA-M3/61?
All SMAJ64CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ64CA-M3/61, 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 SMAJ64CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ64CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ64CA-M3/61 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 …
