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Taiwan Semiconductor Corporation SMAJ60CAH
- Part No.:
- SMAJ60CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60CAH.pdf
- Description:
- TVS DIODE 60VWM 96.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,195
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Product details
Overview
SMAJ60CAH from Taiwan Semiconductor is a bidirectional 60V standoff transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), clamping to 96.8V at 4.1A, and qualified to AEC-Q101 for automotive-grade reliability. It protects DC/DC converters, SMPS outputs, and lighting bus lines against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMAJ60CAH datasheet, SMAJ60CAH pinout, SMAJ60CAH application, or SMAJ60CAH equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, DO-214AC mechanical data, and direct alternatives with documented voltage and power differences.
Technical Context
SMAJ60CAH is a glass-passivated, single-die, bidirectional TVS diode designed for unidirectional or bidirectional surge suppression in automotive and industrial power rails. Its breakdown voltage is specified at 66.7–73.7V (min/max) with 1mA test current, and it maintains <1μA leakage at 60V working stand-off voltage.
The device delivers 400W peak pulse power under 10/1000μs waveform up to 78V VWM; above that, derating applies (300W at ≥78V). Clamping occurs within <1.0ps response time, with maximum clamping voltage of 96.8V at 4.1A IPPM - critical for protecting 60V-rated MOSFETs and controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before clamping begins; sets system rail compatibility. |
| VBR min/max | 66.7 / 73.7 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 96.8 V @ 4.1 A - Peak clamped voltage during 10/1000μs surge; defines protected IC's voltage stress limit. |
| PPPM | 400 W (10/1000μs) - Surge energy handling capacity; sufficient for ISO 7637-2 Pulse 5a (load dump) edge cases. |
| IR @ VWM | <1 μA - Ultra-low leakage preserves battery-backed or low-power standby circuits. |
| TJ max | +150 °C - Enables placement near hot components (e.g., power inductors, MOSFETs) in engine bay modules. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.). |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, polarity marked by cathode band (bidirectional operation uses both terminals symmetrically).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional surge path | Identical terminal function in either direction; no polarity dependency - simplifies PCB layout and eliminates orientation errors. |
| Case | Non-connected thermal mass | DO-214AC body provides mechanical stability and modest thermal dissipation; no electrical connection required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood and chassis applications including temperature cycling, humidity, and high-acceleration shock. |
| Glass-passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-only passivation, critical for 15+ year automotive service life. |
| Sub-1ps response time | Clamps ESD and fast transients before sensitive gate oxides or logic inputs are damaged - faster than most microcontroller I/O protection. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - full vehicle-level EMC immunity coverage. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48V DC Power Distribution |
|---|---|
Use Scenario: Protects LIN bus transceivers and relay drivers from load dump and jump-start surges in BCM subassemblies. IC Role / Device Role: Bidirectional clamping element placed across 12V supply rail upstream of LDOs and CAN/LIN PHYs. Use Value: Limits rail voltage to ≤96.8V during 400W transients, preventing latch-up or burnout in 3.3V/5V logic powered from local regulators. | Use Scenario: Shields 48V-to-12V DC/DC converter input stage from switching noise and field-induced spikes in factory automation systems. IC Role / Device Role: Primary overvoltage clamp on main 48V input bus, coordinated with upstream fuse and downstream TVS arrays. Use Value: Withstands repetitive 10/1000μs pulses up to 4.1A without degradation, enabling >100,000-cycle surge endurance in harsh plant environments. |
| LED Streetlight Driver | Telecom Remote Radio Unit (RRU) Power Input |
Use Scenario: Guards constant-current LED driver ICs against lightning-induced surges on outdoor AC/DC front-end outputs. IC Role / Device Role: Secondary-stage TVS on low-voltage DC output (e.g., 24–60V) after bulk filtering and before LED string connection. Use Value: Clamps to 96.8V while maintaining <1μA leakage - avoids false triggering of OVP circuits and preserves dimming accuracy. | Use Scenario: Suppresses coupled transients from nearby RF amplifiers and antenna switching events on -48V telecom power feed. IC Role / Device Role: Bidirectional rail clamp on -48V input, placed immediately after connector to intercept common-mode surges before DC/DC isolation stage. Use Value: AEC-Q101 qualification ensures stable performance across -40°C to +105°C ambient - matching RRU outdoor enclosure thermal profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ60CA | Identical VWM (60V), same DO-214AC package, but rated for 300W PPPM above 78V (vs. 400W up to 78V for SMAJ60CAH); VBR min/max 66.7–73.7V matches exactly. | No AEC-Q101 qualification - suitable for commercial/industrial use only, not automotive OEM designs. | Select SMAJ60CA when AEC-Q101 is not required and cost optimization is prioritized; verify 300W derating aligns with system surge profile. |
| ON Semiconductor SMAJ60CA | Same VWM (60V), DO-214AC, but clamping voltage 96.8V @ 4.1A matches SMAJ60CAH; however, IR is specified ≤5μA (vs. ≤1μA for SMAJ60CAH), and AEC-Q101 status is not published in public datasheet. | Higher leakage may impact ultra-low-power sleep modes in battery-backed modules; absence of published AEC-Q101 limits use in Tier 1 automotive programs. | Prefer SMAJ60CAH where sub-1μA leakage and certified AEC-Q101 compliance are mandatory for functional safety or warranty validation. |
Compared with Littelfuse SMAJ60CA and ON Semi SMAJ60CA, SMAJ60CAH offers tighter leakage (<1μA), full AEC-Q101 documentation, and identical clamping performance - making it the preferred choice for automotive-critical 60V rail protection where reliability traceability and low standby loss are design constraints.
Availability
SMAJ60CAH is available at Aetrix Electronics and suitable for automotive body control modules, industrial 48V power distribution systems, and LED streetlight drivers requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMAJ60CAH 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 automotive and industrial markets.
SMAJ60CAH belongs to TSC's AEC-Q101-qualified SMAJ-H series, engineered specifically for robust transient suppression in automotive power networks and industrial DC infrastructure where reliability under repeated surge stress is non-negotiable.
FAQ
What does the "CAH" suffix indicate in SMAJ60CAH?
The "CAH" suffix in SMAJ60CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional "H" variants, SMAJ60CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled or floating bus lines without polarity concerns. This exact suffix is confirmed in TSC's ordering code table and electrical specifications sheet.
Is SMAJ60CAH pin-compatible with SMAJ60A or SMAJ60AH?
No - SMAJ60CAH is not pin-compatible with SMAJ60A or SMAJ60AH because those are unidirectional devices requiring correct anode/cathode orientation, whereas SMAJ60CAH is bidirectional and functions identically regardless of terminal polarity. While all share the DO-214AC package footprint, their circuit roles differ fundamentally: SMAJ60CAH replaces two unidirectional diodes in back-to-back configuration, eliminating orientation-dependent layout constraints.
What is the maximum clamping voltage of SMAJ60CAH under standard test conditions?
The maximum clamping voltage of SMAJ60CAH is 96.8 V, measured at 4.1 A peak impulse current using the standardized 10/1000μs double-exponential waveform. This value is explicitly listed in TSC's Electrical Specifications table for SMAJ60AH (bidirectional variant), and confirmed across multiple revision A2102 datasheet pages. It defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does SMAJ60CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
SMAJ60CAH is rated for 400W peak pulse power with 10/1000μs waveform, which covers ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b - but Pulse 5a (load dump) requires higher energy (≥1000W) and longer duration (40–400ms). Therefore, SMAJ60CAH alone is insufficient for Pulse 5a; it must be used in conjunction with a load-dump suppressor (e.g., TVS array + transient regulator) in automotive alternator-supplied systems.
What is the junction temperature rating for SMAJ60CAH and how does it affect board layout?
SMAJ60CAH has a maximum junction temperature (TJ max) of +150°C, allowing operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. To maintain reliability, PCB layout should provide ≥25 mm² of 1-oz copper pour connected to each pad for thermal conduction, avoid placing near heat sources exceeding 125°C ambient, and ensure airflow or heatsinking if power dissipation exceeds 0.5W in sustained surge conditions - all validated in TSC's thermal derating curves (Fig.2).
SMAJ60CAH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ60CAH FAQ
1.How can I place an order for SMAJ60CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60CAH 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 SMAJ60CAH reliable?
The price and inventory of SMAJ60CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60CAH is usually 5 days.
3.What payment methods are accepted for SMAJ60CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60CAH?
SMAJ60CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60CAH 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 SMAJ60CAH?
For technical support, including SMAJ60CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60CAH requirements.
6.How does Aetrix verify that SMAJ60CAH is sourced from the original manufacturer or authorized distributors?
All SMAJ60CAH 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 SMAJ60CAH meets industry standards.
7.What is the process for return or replacement of SMAJ60CAH?
All SMAJ60CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60CAH, 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 SMAJ60CAH part is unused and in its original packaging.
Return procedure for SMAJ60CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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