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Taiwan Semiconductor Corporation SA48H
- Part No.:
- SA48H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48H.pdf
- Description:
- 500W, 59.3V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,347
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Product details
Overview
SA48H from Taiwan Semiconductor is a unidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 48V working stand-off voltage (VWM), 53.3–65.2V breakdown voltage (VBR @ 1mA), and 85.5V maximum clamping voltage (VC) at 6.1A peak pulse current - deployed for automotive ESD and load-dump protection in power supply rails.
For engineers reviewing the SA48H datasheet, SA48H pinout, SA48H application, or SA48H equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and direct alternatives for automotive-grade transient suppression in 12V/24V systems.
Technical Context
The SA48H operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its VBR range (53.3–65.2V) to clamp transients while maintaining <1μA leakage at 48V. Its low dynamic impedance enables rapid energy diversion during fast EFT or ISO 7637-2 pulses.
Designed for automotive environments, it supports junction temperatures from –55°C to +175°C, meets JESD201 Class 2 whisker resistance, and uses pure tin-plated leads compliant with J-STD-002 solderability - all validated per AEC-Q101 stress test conditions including HTGB, TCT, and H3TRB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 12V/24V automotive systems. |
| VBR @ 1mA | 53.3–65.2 V - Breakdown voltage range at 1mA test current; ensures reliable turn-on above nominal system voltage with margin against tolerance drift. |
| VC @ IPPM | 85.5 V at 6.1 A - Clamping voltage under 10/1000μs surge; limits downstream IC stress to ≤85.5V during 500W transient events. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; certifies capability to absorb ISO 7637-2 Pulse 1, 2a, and 5a energy without failure. |
| IR @ VWM | <1 μA - Reverse leakage at 48V; minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot components (e.g., engine control modules) without derating. |
| Package | DO-204AC (DO-15) - Standard axial-leaded through-hole package with cathode band marking; compatible with legacy automotive PCB layouts and wave-solder processes. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode marked by black band; anode and cathode terminals are non-polarized in layout but functionally asymmetric - cathode connects to protected circuit's higher-potential side (e.g., battery rail), anode to ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked lead) | Ground reference node | Connected to system GND or chassis; carries full surge return current during clamping - requires low-inductance path to minimize voltage overshoot. |
| Cathode (banded lead) | Protected line input | Connected to +48V rail or signal line; blocks normal operation up to 48V, then avalanches to shunt surge energy to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use across temperature cycling, humidity, and lifetime reliability tests - required for ECUs, body controllers, and ADAS power stages. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 5a (load dump) up to 500W without degradation - eliminates need for external series impedance or staged protection. |
| Clamping voltage ≤85.5V at 6.1A | Ensures protected ICs (e.g., CAN transceivers, microcontrollers) experience no more than 85.5V during worst-case surge - within absolute maximum ratings of most 100V-tolerant automotive ICs. |
| Leakage <1μA at 48V | Prevents measurable current draw on always-on vehicle batteries - critical for low-power sleep modes in telematics and gateway modules. |
| DO-15 mechanical compatibility | Direct replacement for legacy TVS diodes in existing through-hole designs - no PCB rework needed for upgrade to AEC-Q101 grade. |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local DC-DC input, clamping transients within 1ps response time. Use Value: Limits rail voltage to ≤85.5V during 500W surges, preventing damage to upstream regulators and MCU power supplies without adding series resistance. |
Use Scenario: Shielding high-speed CAN FD transceivers from ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional clamping not applicable - SA48H used only on single-ended supply pins (VCC or VIO) feeding CAN ICs, not on differential data lines. Use Value: Maintains <1μA leakage at 48V VWM to avoid biasing errors in CAN common-mode voltage, while clamping supply overvoltage before regulator input stage fails. |
| Industrial Sensor Power Conditioning | LED Driver Overvoltage Clamp |
Use Scenario: Safeguarding 4–20mA loop-powered sensors and analog front-ends in factory automation cabinets exposed to inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted at sensor module input to absorb 10/1000μs transients induced by relay coil de-energization or motor drive switching. Use Value: 85.5V clamping ensures op-amps and ADC references remain within safe operating area even during repeated 500W surges - extending field service life. |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers during AC line surges or hot-plug events in architectural lighting systems. IC Role / Device Role / Timing Role: Placed across driver output capacitor to clamp overvoltage spikes caused by open-circuit LED string faults or lightning-induced coupling. Use Value: Withstands 70A IFSM surge current without bond wire fusing, enabling robust protection for high-power LED arrays without derating or parallel devices. |
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 SMAJ48A | Same DO-214AC package, 48V VWM, 53.3–59.0V VBR, 77.4V VC @ 6.5A - lower clamping voltage but not AEC-Q101 qualified. | Suitable for industrial/commercial designs where automotive qualification is not mandated; lacks HTGB and TCT validation. | Select SMAJ48A for cost-sensitive non-automotive applications requiring tighter clamping; retain SA48H where AEC-Q101 compliance is mandatory. |
| ON Semiconductor 1.5KE48A | DO-201AD package, 48V VWM, 53.3–59.0V VBR, 77.0V VC @ 6.5A - same electrical specs but larger footprint and no AEC-Q101 certification. | Requires PCB pad redesign due to DO-201AD vs. DO-15 mechanical mismatch; intended for general-purpose rather than automotive deployment. | Choose 1.5KE48A only if DO-15 footprint is unavailable; SA48H provides drop-in DO-15 replacement with automotive qualification and identical thermal profile. |
Compared with SMAJ48A and 1.5KE48A, SA48H uniquely combines DO-15 mechanical compatibility, AEC-Q101 qualification, and 500W 10/1000μs surge rating - making it the sole option for upgrading legacy automotive boards without layout changes or reliability revalidation.
Availability
SA48H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface conditioning, and LED driver overvoltage clamping requiring stable component supply and long-term lifecycle assurance.
Supply support for SA48H 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, and rectifiers - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101-compliant production lines.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low leakage, and extended temperature operation - targeting replacement of legacy 1.5KE and P6KE families in safety-critical systems.
FAQ
What is the AEC-Q101 qualification status of SA48H?
The SA48H is explicitly AEC-Q101 qualified per the manufacturer's ordering code "H" suffix and documentation in Version L2105. This includes full stress testing for high-temperature reverse bias, temperature cycling, and unbiased highly accelerated stress testing - confirming suitability for under-hood automotive applications where reliability is mission-critical. SA48H meets all AEC-Q101 requirements without derating.
Does SA48H support bidirectional transient suppression?
No, SA48H is a unidirectional TVS diode, as confirmed by its single cathode band marking, absence of bidirectional VBR specifications in the SA48 row, and designation in the "Devices for bipolar applications" note requiring "C" or "CA" suffixes for bidirectional types. It must be installed with cathode toward the protected positive rail and anode to ground - reverse connection will cause immediate forward conduction and failure.
What is the maximum clamping voltage of SA48H under standard test conditions?
The maximum clamping voltage of SA48H is 85.5 V at 6.1 A peak pulse current (IPPM), measured using the 10/1000μs double-exponential surge waveform per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Can SA48H replace SA48 in an existing design?
Yes, SA48H is a direct AEC-Q101-qualified version of SA48, sharing identical electrical parameters (VWM = 48V, VBR = 53.3–65.2V, VC = 85.5V), DO-204AC package, and pinout. The "H" suffix denotes enhanced reliability testing - no PCB or schematic changes are required for drop-in replacement in automotive or industrial applications demanding certified robustness.
What is the junction temperature range for SA48H?
The SA48H has a specified operating junction temperature range of –55°C to +175°C, validated per AEC-Q101 thermal characterization. This allows deployment in extreme environments such as engine control units, transmission control modules, and under-dash infotainment systems - with no derating required up to +175°C ambient when mounted per JEDEC standards.
SA48H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- 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)
SA48H FAQ
1.How can I place an order for SA48H through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48H 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 SA48H reliable?
The price and inventory of SA48H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48H is usually 5 days.
3.What payment methods are accepted for SA48H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48H?
SA48H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48H 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 SA48H?
For technical support, including SA48H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48H requirements.
6.How does Aetrix verify that SA48H is sourced from the original manufacturer or authorized distributors?
All SA48H 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 SA48H meets industry standards.
7.What is the process for return or replacement of SA48H?
All SA48H units undergo pre-shipment inspection (PSI). If there is an issue with SA48H, 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 SA48H part is unused and in its original packaging.
Return procedure for SA48H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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