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Taiwan Semiconductor Corporation SMAJ60H
- Part No.:
- SMAJ60H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60H.pdf
- Description:
- TVS DIODE 60VWM 107VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,862
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Product details
Overview
SMAJ60H from Taiwan Semiconductor is a unidirectional surface-mount 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), 107 V clamping voltage (VC) at 3.7 A peak impulse current, and 400 W peak pulse power (10/1000 µs waveform), making it suitable for automotive-grade DC/DC converters and industrial SMPS input stages.
For engineers reviewing the SMAJ60H datasheet, SMAJ60H pinout, SMAJ60H application, or SMAJ60H equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1 ps response time, ≤1 µA reverse leakage at VWM, and DO-214AC mechanical compatibility with automated SMT assembly.
Technical Context
The SMAJ60H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient suppression with minimal capacitance. Its clamping behavior is defined by a 10/1000 µs double-exponential pulse waveform, delivering 107 V VC at 3.7 A IPPM while maintaining thermal stability up to TJ = 150 °C.
It supports bidirectional use only when specified with CH or CAH suffix (e.g., SMAJ60CH); the SMAJ60H variant is strictly unidirectional, with polarity marked by cathode band. Its 1 W steady-state power dissipation and 40 A IFSM surge rating enable reliable operation under repetitive line transients and load-dump conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 66.7 V / 81.5 V @ 1 mA - Ensures consistent avalanche turn-on across production lot |
| VC @ IPPM | 107 V @ 3.7 A - Limits downstream voltage stress during 10/1000 µs transients |
| PPPM | 400 W (10/1000 µs) - Withstands automotive load-dump and ISO 7637-2 pulses |
| IR @ VWM | ≤1 µA - Negligible standby power loss in always-on 12 V/24 V systems |
| TJ max | 150 °C - Enables placement near hot components in enclosed power modules |
| Package | DO-214AC (SMA) - Industry-standard SMT footprint, compatible with IPC-7351B land pattern |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band on cathode end; weight ≈ 0.060 g; meets UL 94V-0 and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or low-voltage rail; defines clamping path direction |
| Cathode | High-side transient sink | Connected to protected line (e.g., 60 V input rail); absorbs surge energy into ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements (HTOL, TC, UHAST) |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | <1.0 ps - Clamps transients before sensitive ICs experience overvoltage damage |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) |
| Moisture sensitivity level | MSL Level 1 - No floor life limitation; safe for standard reflow without baking |
Applications
| Automotive DC/DC Converter Input Protection | Industrial SMPS Line Surge Suppression |
|---|---|
Use Scenario: Protecting 60 V-rated buck converter inputs against battery load-dump spikes in commercial vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between input rail and chassis ground to clamp transients above 60 V. Use Value: Limits peak voltage to 107 V during 400 W ISO 7637-2 Pulse 5a events, preventing MOSFET gate oxide failure. | Use Scenario: Safeguarding 48–60 V telecom rectifier outputs from lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across output terminals to shunt transient energy before reaching downstream regulators. Use Value: Delivers 3.7 A peak impulse current handling with ≤1 µA leakage, minimizing standby power loss in 24/7 systems. |
| On-Board Charger (OBC) Auxiliary Supply Protection | LED Driver Power Stage Transient Suppression |
Use Scenario: Shielding 60 V auxiliary supply rails in EV on-board chargers from CAN bus coupling noise and relay bounce. IC Role / Device Role / Timing Role: Unidirectional transient suppressor mounted at OBC control board input, cathode to rail. Use Value: Responds in <1 ps to sub-microsecond transients, preserving MCU and gate driver functionality during switching transitions. | Use Scenario: Protecting constant-current LED driver ICs from inductive kickback during MOSFET switching in high-bay lighting. IC Role / Device Role / Timing Role: TVS placed across driver output to clamp flyback voltage spikes exceeding 60 V. Use Value: Maintains 107 V clamping threshold across temperature range (−55 °C to +150 °C), ensuring consistent protection in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60AH | Lower VBR range (66.7–73.7 V), tighter tolerance; same VWM, VC = 96.8 V @ 4.1 A | Better suited for designs requiring lower clamping voltage and higher surge current margin | Select SMAJ60AH when tighter VBR consistency and reduced VC are prioritized over maximum peak power rating |
| SMBJ60A | Same VWM/VBR specs but in larger DO-214AA (SMB) package; 600 W PPPM rating | Higher power handling enables longer-duration transients; requires larger PCB area | Choose SMBJ60A where space permits and 600 W surge capability is required beyond SMAJ60H's 400 W limit |
Compared with SMAJ60AH and SMBJ60A, the SMAJ60H offers the lowest clamping voltage among A-suffix variants at 107 V, balances cost and footprint in DO-214AC, and delivers verified AEC-Q101 compliance - making it optimal for space-constrained automotive and industrial 60 V rail protection where 400 W pulse rating suffices.
Availability
SMAJ60H is available at Aetrix Electronics and suitable for automotive ECU design, industrial SMPS development, and LED driver production requiring stable component supply and full traceability.
Supply support for SMAJ60H 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, serving global automotive, industrial, and consumer markets since 1979.
The SMAJ series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh-environment 12 V/24 V/48 V/60 V automotive and industrial power systems.
FAQ
What is the clamping voltage of SMAJ60H and how is it measured?
The SMAJ60H has a maximum clamping voltage (VC) of 107 V, measured at 3.7 A peak impulse current (IPPM) using a standardized 10/1000 µs double-exponential transient waveform. This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and reflects the actual voltage seen by downstream circuitry during surge events. The SMAJ60H datasheet specifies this parameter under "ELECTRICAL SPECIFICATIONS" Table for part number SMAJ60H.
Is SMAJ60H unidirectional or bidirectional, and how is polarity identified?
The SMAJ60H is a unidirectional TVS diode, intended for protection of positive-polarity DC lines only. Polarity is marked by a cathode band on the package body - the banded end is the cathode and must be connected to the protected line (e.g., 60 V rail), while the anode connects to ground. Bidirectional variants require CH or CAH suffixes (e.g., SMAJ60CH), which are distinct part numbers with different marking codes and electrical symmetry.
Does SMAJ60H meet automotive qualification standards?
Yes, SMAJ60H is AEC-Q101 qualified and explicitly certified for automotive applications. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, and its construction - including glass-passivated junction, MSL Level 1 moisture resistance, and JESD201 Class 2 whisker resistance - satisfies automotive reliability and manufacturability mandates. The SMAJ60H product page and datasheet Version A2102 confirm this qualification status.
What is the maximum steady-state power dissipation for SMAJ60H?
The SMAJ60H has a maximum steady-state power dissipation (PD) of 1 W at TA = 25 °C, derated linearly above that ambient temperature per the Pulse Derating Curve (Fig.2). This rating applies to continuous DC reverse bias conditions and is distinct from its 400 W peak pulse power (PPPM) capability. Engineers must ensure thermal design accounts for PD in high-temperature environments, especially when reverse leakage current increases near VWM.
Can SMAJ60H be used in place of SMAJ60AH?
No - SMAJ60H and SMAJ60AH are not interchangeable without circuit review. While both share VWM = 60 V, SMAJ60AH has a lower VBR range (66.7–73.7 V vs. 66.7–81.5 V) and lower clamping voltage (96.8 V vs. 107 V). Substituting SMAJ60H for SMAJ60AH may result in earlier clamping and higher stress on upstream components. Always verify layout, thermal margin, and transient response with the exact SMAJ60H datasheet parameters before replacement.
SMAJ60H 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:
- 107V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
SMAJ60H FAQ
1.How can I place an order for SMAJ60H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60H 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 SMAJ60H reliable?
The price and inventory of SMAJ60H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60H is usually 5 days.
3.What payment methods are accepted for SMAJ60H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60H?
SMAJ60H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60H 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 SMAJ60H?
For technical support, including SMAJ60H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60H requirements.
6.How does Aetrix verify that SMAJ60H is sourced from the original manufacturer or authorized distributors?
All SMAJ60H 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 SMAJ60H meets industry standards.
7.What is the process for return or replacement of SMAJ60H?
All SMAJ60H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60H, 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 SMAJ60H part is unused and in its original packaging.
Return procedure for SMAJ60H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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