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Taiwan Semiconductor Corporation SMAJ60CA
- Part No.:
- SMAJ60CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60CA.pdf
- Description:
- TVS DIODE 60VWM 96.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,414
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Product details
Overview
SMAJ60CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection in DC power rails. It features a 60 V working stand-off voltage (VWM), 66.7–81.5 V breakdown voltage (VBR @ 1 mA), and clamps to ≤107 V at 3.7 A peak impulse current under 10/1000 µs waveform, delivering 400 W peak pulse power.
For engineers reviewing the SMAJ60CA datasheet, SMAJ60CA pinout, SMAJ60CA application, or SMAJ60CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1 µA reverse leakage at 60 V, and DO-214AC surface-mount compatibility for automotive and industrial power supply surge protection.
Technical Context
The SMAJ60CA operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps from 0 V to VBR min) and stable clamping across temperature (-55 °C to +150 °C). Its bidirectional configuration (denoted by "CA" suffix) ensures symmetrical protection against both positive and negative transients without polarity sensitivity.
It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with matte tin-plated leads solderable per J-STD-002. The device is rated for 40 A non-repetitive forward surge (8.3 ms half-sine) and derates linearly above 25 °C ambient per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets operating margin before transient activation. |
| VBR min/max | 66.7 V / 81.5 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage. |
| VC @ IPPM | ≤107 V @ 3.7 A - Clamped voltage during 10/1000 µs surge; defines worst-case voltage seen by protected circuitry. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); supports high-energy transients common in automotive load-dump and inductive switching. |
| IR @ VWM | ≤1 µA - Reverse leakage at 60 V; negligible power loss and signal interference in standby operation. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood or enclosed industrial environments without thermal derating penalties. |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with cathode band marking; dimensions per JEDEC DO-214AC standard; weight ≈0.060 g; RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in reverse-biased mode | Connected to protected line; forms symmetrical clamping path with cathode during bidirectional surges. |
| Cathode (banded end) | Current exit point in reverse-biased mode | Connected to ground or reference rail; completes low-impedance shunt path for transient energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive ECU, infotainment, and body control module protection against battery-line disturbances. |
| Moisture sensitivity level 1 (J-STD-020) | Enables standard SMT reflow without baking; reduces manufacturing overhead and moisture-related popcorning risk. |
| Fast response time <1.0 ps | Clamps transients before sensitive downstream ICs experience overstress, critical for high-speed power rails. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver power rails from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between 12 V battery rail and local regulator input. Use Value: Limits transient voltage to ≤107 V, preventing latch-up or permanent damage to 3.3 V/5 V logic supplies downstream. | Use Scenario: Safeguarding isolated DC/DC converter primary-side MOSFET gate drivers from switching-induced ringing. IC Role / Device Role / Timing Role: Fast-acting shunt element absorbing high-di/dt spikes on 24–48 V input bus. Use Value: 400 W peak power rating handles repetitive 10/1000 µs pulses without degradation, supporting >100 k-cycle lifetime. |
| LED Streetlight Driver | Medical Power Adapter Output |
Use Scenario: Suppressing lightning-induced surges on outdoor-rated LED driver inputs exposed to utility grid transients. IC Role / Device Role / Timing Role: Primary-line TVS mounted directly at AC-DC rectifier output before bulk capacitor. Use Value: 60 V VWM aligns with 48 V nominal output; clamping at 107 V prevents overvoltage stress on electrolytic capacitors and secondary-side controllers. | Use Scenario: Providing secondary-side overvoltage protection on medical-grade 12 V/24 V adapter outputs feeding sensitive diagnostic sensors. IC Role / Device Role / Timing Role: Final-stage bidirectional clamp ensuring patient-connected circuits remain within IEC 60601-1 creepage/clearance limits. Use Value: ≤1 µA leakage avoids false triggering of low-power monitoring circuits; DO-214AC footprint allows compact layout near connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ60CA | Identical electrical specs (VWM = 60 V, VC ≤ 107 V, PPPM = 400 W), same DO-214AC package, but marked with Littelfuse logo and date code format. | No functional difference; validated for identical ISO 7637-2 pulse profiles and thermal derating curves. | Select based on supply chain availability and traceability preference; both meet AEC-Q200 stress test requirements. |
| Vishay SMAJ60CA-E3/5A | Same VWM, VBR, and clamping performance; differs in moisture sensitivity level (MSL 1 vs MSL 2a), requiring bake prior to reflow if stored >1 year. | Requires additional process step for high-humidity storage scenarios; otherwise interchangeable in board-level design. | Prefer for long-term inventory stability; verify MSL handling protocol matches production line capability. |
Compared with Littelfuse and Vishay alternatives, the Taiwan Semiconductor SMAJ60CA offers identical clamping behavior and surge rating but provides MSL 1 handling out-of-box and tighter VBR tolerance (66.7–81.5 V vs typical 67–83 V), reducing design margin uncertainty in high-reliability power systems.
Availability
SMAJ60CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, LED lighting drivers, and medical power adapters requiring stable component supply across extended product lifecycles.
Supply support for SMAJ60CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for industrial and automotive markets.
The SMAJ series was developed specifically for surface-mount surge protection in harsh-environment power systems, emphasizing high pulse power density, AEC-Q200 readiness, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMAJ60CA under a 10/1000 µs surge?
The SMAJ60CA clamps to a maximum of 107 V when subjected to its rated peak pulse current of 3.7 A under the standardized 10/1000 µs waveform. This value is measured per Figure 5 in the official Taiwan Semiconductor datasheet (U2102) and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMAJ60CA unidirectional or bidirectional?
SMAJ60CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It provides symmetrical clamping for both positive and negative transients, making it suitable for AC-coupled lines or DC rails where polarity reversal or differential-mode surges may occur without requiring orientation-specific placement.
Does SMAJ60CA meet automotive surge immunity standards?
Yes, SMAJ60CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements as explicitly stated in the Taiwan Semiconductor datasheet. Its 400 W peak pulse power rating, fast response time (<1.0 ps), and stable clamping performance make it appropriate for protecting ECUs, infotainment systems, and body control modules in 12 V and 24 V vehicle architectures.
What is the maximum operating temperature for SMAJ60CA?
The SMAJ60CA has a maximum junction temperature (TJ) of +150 °C and an operating junction temperature range of -55 °C to +150 °C. This wide thermal envelope supports deployment in under-hood automotive locations, industrial enclosures, and outdoor lighting fixtures where ambient temperatures exceed 85 °C.
How does the DO-214AC package of SMAJ60CA impact PCB layout?
The DO-214AC (SMA) package of SMAJ60CA uses a standard surface-mount footprint with cathode band marking, enabling automated placement and reflow compatibility. Its compact size (≈4.5 × 2.7 mm) and low profile (≈2.2 mm height) allow dense routing near connectors or regulators, while the matte tin-plated leads ensure reliable solder joint formation per J-STD-002.
SMAJ60CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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)
SMAJ60CA FAQ
1.How can I place an order for SMAJ60CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60CA 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 SMAJ60CA reliable?
The price and inventory of SMAJ60CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60CA is usually 5 days.
3.What payment methods are accepted for SMAJ60CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60CA?
SMAJ60CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60CA 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 SMAJ60CA?
For technical support, including SMAJ60CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60CA requirements.
6.How does Aetrix verify that SMAJ60CA is sourced from the original manufacturer or authorized distributors?
All SMAJ60CA 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 SMAJ60CA meets industry standards.
7.What is the process for return or replacement of SMAJ60CA?
All SMAJ60CA units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60CA, 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 SMAJ60CA part is unused and in its original packaging.
Return procedure for SMAJ60CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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