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Taiwan Semiconductor Corporation SMAJ60AH
- Part No.:
- SMAJ60AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60AH.pdf
- Description:
- TVS DIODE 60VWM 96.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,874
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Product details
Overview
SMAJ60AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 60 V working stand-off voltage (VWM), 66.7–73.7 V breakdown voltage (VBR), 96.8 V maximum clamping voltage (VC) at 4.1 A peak impulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive-grade SMPS, on-board DC/DC converters, and lighting control circuits.
For engineers reviewing the SMAJ60AH datasheet, SMAJ60AH pinout, SMAJ60AH application, or SMAJ60AH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package compatibility with automated placement, low leakage (<1 µA @ 60 V), fast sub-1 ps response time, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive transients.
Technical Context
The SMAJ60AH operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transient surges while maintaining low capacitance and minimal leakage. Its breakdown threshold is tested at 1 mA, and it delivers stable clamping performance across -55°C to +150°C junction temperature range.
It supports single-pulse surge handling up to 400 W (10/1000 µs), derated linearly above 25°C ambient, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements - confirming suitability for reflow-soldered automotive and industrial PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail margin. |
| VBR min/max | 66.7 V / 73.7 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 96.8 V @ 4.1 A - Clamped voltage under 10/1000 µs surge; limits downstream IC stress to <100 V. |
| PPPM | 400 W - Peak pulse power handling; sustains automotive load-dump and ISO 7637-2 Pulse 5a events. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage; avoids parasitic current drain in battery-backed systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or enclosed power modules. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, UL 94V-0 molding compound, 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 60 V rail); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - supports under-hood and powertrain applications. |
| Glass-passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity exposure. |
| Fast response time <1 ps | Clamps ESD and fast transients before sensitive downstream logic or analog circuitry is damaged. |
| ISO 7637-2 compliance | Withstands standardized automotive electrical disturbances including Pulse 1 (inductive switch-off), 2a/2b (battery interruption), and 3a/3b (capacitive coupling). |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives - suitable for environmentally regulated industrial and consumer designs. |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply (SMPS) |
|---|---|
Use Scenario: Protects 60 V intermediate bus in 12 V → 60 V boost converter used for ADAS camera power rails. IC Role / Device Role / Timing Role: Unidirectional TVS placed at input filter stage to clamp load-dump spikes and ISO 7637-2 Pulse 5a surges. Use Value: Limits transient voltage to ≤96.8 V, preventing damage to controller ICs and MOSFET gate drivers rated for 100 V max. |
Use Scenario: Safeguards primary-side rectifier output in telecom-grade 48 V SMPS subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 400 W pulses without degradation, per IEC 61000-4-5 Level 3. Use Value: Maintains <1 µA leakage at 60 V, avoiding efficiency loss in high-efficiency (>94%) power conversion stages. |
| LED Driver Lighting Module | Automotive Body Control Module (BCM) Power Input |
Use Scenario: Shields constant-current LED driver IC from inductive kickback during PWM dimming in commercial streetlight systems. IC Role / Device Role / Timing Role: Fast-clamping TVS placed across driver input capacitor to suppress switching noise and relay bounce transients. Use Value: Sub-1 ps response ensures clamping occurs before driver IC's internal ESD structures are stressed beyond rated limits. |
Use Scenario: Installed at BCM main 12 V supply entry point to handle battery disconnect/reconnect transients and alternator load dump. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional suppressor meeting ISO 7637-2 Pulse 1 (−150 V/2 Ω) and Pulse 2b (+100 V/50 Ω) waveforms. Use Value: Withstands 400 W peak power without parameter shift, ensuring functional safety compliance over full vehicle lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60H | Higher VBR range (66.7–81.5 V); higher clamping voltage (107 V @ 3.7 A) | Less margin between VWM and VC; less suitable for 60 V systems with tight voltage headroom | Select SMAJ60H only if system tolerates >107 V clamping or requires higher surge current rating at same power level. |
| SMBJ60AH | Same VWM/VBR/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM | Requires larger PCB footprint; better thermal dissipation for high-duty-cycle surge environments | Choose SMBJ60AH when board layout allows larger package and sustained surge energy exceeds 400 W capability. |
Compared with SMAJ60H and SMBJ60AH, the SMAJ60AH offers optimal balance of compact DO-214AC footprint, tighter VBR tolerance (±5.3%), lower clamping voltage (96.8 V), and AEC-Q101 validation - making it preferred for space-constrained, automotive-compliant 60 V rail protection.
Availability
SMAJ60AH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switching mode power supplies, and LED driver lighting modules requiring stable component supply, full traceability, and AEC-Q101 assurance.
Supply support for SMAJ60AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park, Taiwan.
The SMAJ series is engineered specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 compliance, low clamping ratio, and robust surge endurance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMAJ60AH and how is it measured?
The SMAJ60AH has a maximum clamping voltage (VC) of 96.8 V, measured at a peak impulse current (IPPM) of 4.1 A using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed per the manufacturer's electrical specifications table and reflects worst-case voltage seen by downstream circuitry during transient events - critical for validating voltage margins of protected ICs and MOSFETs in the SMAJ60AH design.
Is SMAJ60AH suitable for bidirectional transient protection?
No, SMAJ60AH is a unidirectional TVS diode intended for DC rail protection where polarity is fixed. For bidirectional applications (e.g., AC lines or data buses), Taiwan Semiconductor specifies the SMAJ60CH or SMAJ60CAH variants - which feature symmetrical breakdown in both directions. Using SMAJ60AH in reverse-biased AC scenarios risks permanent failure due to forward conduction beyond its 3.5 V VF rating.
Does SMAJ60AH meet automotive qualification standards?
Yes, SMAJ60AH is explicitly AEC-Q101 qualified and certified for automotive use. It complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity tests, and passes JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements - confirming suitability for engine control units, body electronics, and ADAS power domains.
What is the thermal derating behavior of SMAJ60AH above 25°C ambient?
SMAJ60AH's peak pulse power (PPPM) is derated linearly above 25°C ambient temperature per Figure 2 in the official datasheet. At 85°C ambient, its 400 W rating reduces to approximately 260 W; at 125°C, it falls to ~140 W. This derating must be applied when sizing for repeated surges in high-temperature enclosures or under-hood environments to avoid junction overheating and parametric shift.
How does the marking code "RK" relate to SMAJ60AH?
"RK" is the official marking code laser-etched on the SMAJ60AH device body per the manufacturer's ordering information table. It uniquely identifies the SMAJ60AH variant - distinguishing it from SMAJ60H ("RH") and other voltage grades - and confirms correct VBR (66.7–73.7 V), VWM (60 V), and AEC-Q101 qualification status during visual inspection and traceability audits.
SMAJ60AH 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:
- 1
- Bidirectional Channels:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ60AH FAQ
1.How can I place an order for SMAJ60AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60AH 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 SMAJ60AH reliable?
The price and inventory of SMAJ60AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60AH is usually 5 days.
3.What payment methods are accepted for SMAJ60AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60AH?
SMAJ60AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60AH 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 SMAJ60AH?
For technical support, including SMAJ60AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60AH requirements.
6.How does Aetrix verify that SMAJ60AH is sourced from the original manufacturer or authorized distributors?
All SMAJ60AH 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 SMAJ60AH meets industry standards.
7.What is the process for return or replacement of SMAJ60AH?
All SMAJ60AH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60AH, 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 SMAJ60AH part is unused and in its original packaging.
Return procedure for SMAJ60AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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