My Inquiry
My Account
Taiwan Semiconductor Corporation SA17CAH
- Part No.:
- SA17CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA17CAH.pdf
- Description:
- TVS DIODE 17VWM 27.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,078
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA17CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 17V working stand-off voltage (VWM), 18.9–23.1V breakdown voltage (VBR), and 30.5V maximum clamping voltage (VC) at 17A peak pulse current - used for ESD and surge protection in automotive lighting and powertrain control modules.
For engineers reviewing the SA17CAH datasheet, SA17CAH pinout, SA17CAH application, or SA17CAH equivalent, this page delivers verified electrical parameters, bidirectional TVS behavior, AEC-Q101 qualification status, DO-15 mechanical data, and real-world protection use cases - all confirmed from Taiwan Semiconductor's official SA Series specification L2105.
Technical Context
The SA17CAH is a silicon avalanche diode designed for bidirectional transient suppression, with symmetrical VBR min/max (18.9–23.1V) and identical clamping performance in both polarities. It operates across –55°C to +175°C junction temperature and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Its low clamping ratio (VC/VBR ≈ 1.3–1.6) and sub-5ns response time ensure fast energy diversion during EFT and lightning-induced surges. The device sustains 70A non-repetitive forward surge current (IFSM) and exhibits <1μA reverse leakage above 10V, enabling low-power system compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines safe operating margin below breakdown. |
| VBR @ IT=1mA | 18.9–23.1 V - Breakdown occurs within this range at 1mA test current; ensures predictable turn-on during transients. |
| VC @ IPPM=17A | 30.5 V - Clamping voltage measured at 17A peak pulse current (10/1000μs); limits downstream voltage stress. |
| PPK | 500 W - Peak pulse power handling per single 10/1000μs surge; supports IEC 61000-4-5 Level 4 compliance. |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood automotive deployment without derating. |
| IR @ VWM | <1 μA - Reverse leakage at 17V stand-off; minimizes quiescent power loss in battery-powered systems. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
DO-204AC (DO-15) axial-leaded package with cathode band marking for unidirectional variants; SA17CAH is bidirectional and has no polarity marking - terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity; no orientation required in PCB layout. |
| Lead 1 / Lead 2 | Surge current path | Full 500W pulse power handled across both leads; requires ≥9.5mm lead length for 3W steady-state dissipation per JEDEC mounting condition. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR (18.9–23.1V) and VC (30.5V) in both directions - eliminates need for polarity-aware placement in AC-coupled or floating signal lines. |
| AEC-Q101 qualification | Validated for automotive under-hood environments including 1000-cycle temperature cycling (–40°C to +125°C) and 1000-hour HTRB at 175°C - supports ASIL-B system integration. |
| Low clamping ratio | VC/VBR ≤ 1.6 - limits protected IC voltage excursion to ≤60% above breakdown, reducing risk of gate oxide damage in MOSFET drivers. |
| Sub-5ns response time | ≤5.0 ns from 0V to VBR - engages before most microsecond-scale EFT bursts (IEC 61000-4-4) propagate into sensitive logic. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - meets automotive OEM material declaration requirements. |
Applications
| Automotive LED Headlamp Driver Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting constant-current LED driver ICs from load-dump transients (ISO 7637-2 Pulse 5a, up to 110V/100ms) and alternator ripple spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp positive and negative excursions before they reach the buck controller and gate drivers. Use Value: With 30.5V clamping at 17A and 175°C rating, SA17CAH prevents latch-up and thermal runaway in LED drivers during cold-cranking events. | Use Scenario: Safeguarding 5V/3.3V regulator inputs in engine control units exposed to ISO 16750-2 supply voltage transients (Pulse 4, ±100V/50ms). IC Role / Device Role / Timing Role: Primary front-end surge suppressor on main 12V rail, positioned ahead of input filter capacitors and LDOs. Use Value: 500W peak power rating and 175°C operation allow sustained suppression without degradation during repeated cranking cycles. |
| Body Control Module (BCM) LIN Bus Interface | Electric Power Steering (EPS) Motor Phase Protection |
Use Scenario: Shielding LIN transceiver pins from ESD (IEC 61000-4-2 ±8kV contact) and coupled noise from adjacent high-current solenoid switching. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector entry point, shunting transients before LIN PHY input stage. Use Value: Sub-5ns response and <1μA leakage preserve signal integrity and sleep-mode current budget in always-on BCM nodes. | Use Scenario: Suppressing inductive kickback (L·di/dt) from 3-phase BLDC motor windings during PWM commutation in EPS systems. IC Role / Device Role / Timing Role: Snubber-connected TVS across each phase-to-ground node, absorbing regenerative energy during freewheeling. Use Value: Symmetrical clamping and 70A IFSM rating enable robust protection against repetitive 100A+ motor current reversals without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA | Same VWM (17V), but lower PPK (400W); DO-214AC (SMA) package; 30.5V VC at 12.3A. | Lower surge rating suits consumer-grade industrial controls; not AEC-Q101 qualified. | Select SMAJ17CA only if automotive qualification is unnecessary and board space permits SMA footprint. |
| P6SMB17CA | Same VWM (17V) and PPK (600W); DO-214AA (SMB) package; 27.6V VC at 21.2A; AEC-Q101 option available (P6SMB17CAHE3). | Higher surge capacity and lower clamping voltage benefit high-reliability ADAS power domains. | Choose P6SMB17CAHE3 when higher peak current margin (>17A) and tighter clamping (<30.5V) are required in AEC-Q101 designs. |
Compared with SMAJ17CA and P6SMB17CAHE3, SA17CAH offers the optimal balance of AEC-Q101 compliance, DO-15 through-hole robustness, and precise 30.5V clamping at 17A - making it preferred for cost-sensitive, high-vibration automotive modules where leaded mounting enhances mechanical retention.
Availability
SA17CAH is available at Aetrix Electronics and suitable for automotive lighting systems, engine control units, body control modules, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for SA17CAH 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, MOSFETs, and power management devices since 1979.
The SA Series was developed specifically for automotive-grade transient suppression, emphasizing AEC-Q101 qualification, high-temperature stability, and repeatable clamping performance in harsh under-hood environments.
FAQ
What does the "H" suffix in SA17CAH signify?
The "H" suffix in SA17CAH indicates full AEC-Q101 qualification per Rev D standards, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8kV). This distinguishes SA17CAH from non-H variants like SA17CA, which lack automotive reliability validation. SA17CAH is certified for use in safety-critical vehicle subsystems where long-term parametric stability is mandatory.
Is SA17CAH unidirectional or bidirectional, and how is polarity identified?
SA17CAH is a bidirectional TVS diode - its breakdown and clamping characteristics are identical in both polarities, with no cathode band or polarity marking on the DO-15 package. Unlike unidirectional SA17A variants, SA17CAH has symmetrical VBR (18.9–23.1V) and VC (30.5V) specifications in either direction, enabling flexible placement across AC signals or floating buses without orientation constraints.
What is the maximum clamping voltage of SA17CAH under standardized surge conditions?
The maximum clamping voltage of SA17CAH is 30.5 V, measured at 17 A peak pulse current using the 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (–55°C to +175°C) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Can SA17CAH replace SA17A in an existing design?
No - SA17CAH cannot directly replace SA17A because SA17A is unidirectional (cathode-banded, asymmetric conduction), while SA17CAH is bidirectional (no polarity, symmetrical clamping). Swapping them risks improper transient suppression on DC-biased lines. SA17CAH is only suitable where bidirectional protection is explicitly required, such as across LIN bus lines or AC-coupled sensor interfaces.
What packaging options are available for SA17CAH?
SA17CAH is supplied in 3,500-piece tape-and-reel format (EIA-481 compliant) for automated SMT assembly, with lead finish specified as pure tin per J-STD-002. The DO-204AC (DO-15) package uses UL 94V-0 molding compound and meets JESD201 Class 2 whisker resistance - confirming suitability for reflow and wave soldering in automotive production lines.
SA17CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- SA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 19A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA17CAH FAQ
1.How can I place an order for SA17CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA17CAH 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 SA17CAH reliable?
The price and inventory of SA17CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA17CAH is usually 5 days.
3.What payment methods are accepted for SA17CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA17CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA17CAH?
SA17CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA17CAH 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 SA17CAH?
For technical support, including SA17CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA17CAH requirements.
6.How does Aetrix verify that SA17CAH is sourced from the original manufacturer or authorized distributors?
All SA17CAH 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 SA17CAH meets industry standards.
7.What is the process for return or replacement of SA17CAH?
All SA17CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA17CAH, 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 SA17CAH part is unused and in its original packaging.
Return procedure for SA17CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA17CAH 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
