My Inquiry
My Account
Taiwan Semiconductor Corporation 1KSMB56AH
- Part No.:
- 1KSMB56AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB56AH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,307
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1KSMB56AH from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 53.2–58.8 V, stand-off voltage 47.8 V, clamping voltage 77.0 V at 13.0 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1KSMB56AH datasheet, 1KSMB56AH pinout, 1KSMB56AH application, or 1KSMB56AH equivalent, this TVS diode delivers precise overvoltage protection for 48 V automotive subsystems, industrial power rails, and DC-DC converter inputs where fast response (<1.0 ps), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and moisture level 1 handling are critical selection criteria.
Technical Context
The 1KSMB56AH operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its minimum breakdown threshold of 53.2 V. It sustains 1000 W peak pulse power under 10/1000 µs waveform and limits transient energy to ≤77.0 V at 13.0 A IPP, enabling robust protection of downstream MOSFETs, controllers, and sensing circuitry.
Its glass-passivated junction ensures stable VBR over temperature and life cycle, while the DO-214AA package provides 20 °C/W junction-to-lead thermal resistance and supports automated SMT placement per J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 53.2 V / 58.8 V - defines reliable conduction onset range under 1 mA test current |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPP | 77.0 V at 13.0 A - clamped voltage during worst-case 10/1000 µs surge, limiting stress on protected IC |
| PPPM | 1000 W - peak pulse power rating determines survivability against ISO 7637-2 Pulse 2b (inductive load dump) |
| TJ max | +175 °C - enables operation in under-hood automotive environments without derating |
| Response time | <1.0 ps - sub-picosecond turn-on ensures suppression before sensitive logic or analog circuits are damaged |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration; matte tin-plated leads, UL 94V-0 molding compound, 0.110 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; establishes reference for clamping action |
| Cathode | Protected line input | Connected to supply rail (e.g., 48 V bus); absorbs surge current into anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units, body modules, and ADAS power domains |
| Glass passivated junction | Ensures long-term VBR stability and low parametric drift across 1000+ thermal cycles |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive flyback), Pulse 2a/2b (load dump), and Pulse 3a/3b (switching transients) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines |
Applications
| Automotive Power Rail Protection | Industrial DC-DC Input Stage |
|---|---|
Use Scenario: 48 V mild-hybrid vehicle battery interface exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of buck controller and gate drivers. Use Value: Limits transient voltage to ≤77.0 V, preventing latch-up or oxide rupture in 65 V-rated power stages. | Use Scenario: 24–48 V industrial PLC power input subjected to relay contact bounce and EFT bursts. IC Role / Device Role / Timing Role: Primary overvoltage guard before input filter and rectifier stage. Use Value: Sub-1 ps response captures fast-edge transients missed by bulk capacitors alone, reducing system-level immunity test failures. |
| LED Driver Surge Suppression | Motor Control Board Transient Guard |
Use Scenario: Constant-current LED driver board in streetlight fixture experiencing lightning-induced coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt induced common-mode spikes. Use Value: 1000 W PPPM rating handles multi-kV coupled surges without degradation, preserving luminous output consistency. | Use Scenario: H-bridge motor driver PCB with inductive back-EMF during rapid direction reversal. IC Role / Device Role / Timing Role: Clamp diode across high-side FET source-drain to absorb inductive kickback. Use Value: Clamping at 77.0 V prevents drain-source avalanche in 80 V MOSFETs, extending FET lifetime and reducing field returns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | VBR min/max = 64.4–71.2 V; VC = 93.6 V at 10.7 A; same DO-214AA package | Higher clamping voltage reduces margin for 65 V-rated components; lower IPP (10.7 A vs. 13.0 A) | Select SMBJ58A only if system design tolerates ≥93.6 V transient excursion and uses higher-voltage FETs |
| P6SMB56A | VBR min/max = 53.2–58.8 V (identical); VC = 77.0 V at 13.0 A (identical); same DO-214AA footprint | No functional difference; RoHS/halogen-free status and AEC-Q101 qualification must be verified per lot | P6SMB56A is a direct functional alternative but requires validation of automotive qualification and moisture sensitivity level |
Compared with SMBJ58A and P6SMB56A, the 1KSMB56AH offers identical electrical clamping performance to P6SMB56A while guaranteeing AEC-Q101 qualification and J-STD-020 Level 1 handling-critical for zero-defect automotive production and extended-temperature industrial deployments.
Availability
1KSMB56AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drives, LED lighting systems, and DC-DC converter inputs requiring stable component supply with full traceability and lifecycle support.
Supply support for 1KSMB56AH 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 1KSMBxxAH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in harsh-environment 12 V–48 V automotive and industrial power systems.
FAQ
What is the polarity configuration of the 1KSMB56AH?
The 1KSMB56AH is a unidirectional TVS diode with cathode band marking. It conducts only during reverse overvoltage events-forward bias behaves like a standard silicon diode with VF ≈ 3.5 V at 50 A. This configuration is ideal for protecting positive-rail systems where ground-referenced clamping is required, and it is not interchangeable with bidirectional variants such as 1KSMB56CAH without circuit redesign.
Does the 1KSMB56AH meet ISO 7637-2 Pulse 2b requirements?
Yes, the 1KSMB56AH meets ISO 7637-2 Pulse 2b (load dump) requirements due to its 1000 W peak pulse power rating and 77.0 V clamping voltage at 13.0 A. Its ability to sustain 10/1000 µs surges without degradation-validated per AEC-Q101 stress testing-ensures compliance in 12 V and 48 V automotive networks where load dump transients exceed 60 V.
What is the maximum steady-state power dissipation for the 1KSMB56AH?
The 1KSMB56AH has a steady-state power dissipation (PD) of 5 W at TA = 25 °C. This rating applies only to continuous DC or low-frequency reverse leakage conditions-not transient suppression. In normal operation, leakage at 47.8 V is ≤1 µA, resulting in negligible static power; the 5 W limit becomes relevant only during sustained overvoltage faults exceeding VWM.
Is the 1KSMB56AH suitable for use in lead-free reflow processes?
Yes, the 1KSMB56AH is fully compatible with lead-free reflow profiles. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the DO-214AA package is rated for peak reflow temperatures up to 260 °C per J-STD-020 Level 1 moisture sensitivity-no pre-bake is required, supporting high-yield automated assembly in modern SMT lines.
How does the 1KSMB56AH compare to the 1KSMB56CAH variant?
The 1KSMB56CAH is the bidirectional version of the same platform, with symmetrical breakdown in both polarities (VBR = 53.2–58.8 V in either direction) and no cathode band marking. The 1KSMB56AH is unidirectional only and must not be substituted for AC-coupled or dual-rail protection without verifying polarity alignment and clamping symmetry-using 1KSMB56AH in place of 1KSMB56CAH risks failure during positive transients.
1KSMB56AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- 1KSMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 13A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB56AH FAQ
1.How can I place an order for 1KSMB56AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB56AH 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 1KSMB56AH reliable?
The price and inventory of 1KSMB56AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB56AH is usually 5 days.
3.What payment methods are accepted for 1KSMB56AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB56AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB56AH?
1KSMB56AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB56AH 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 1KSMB56AH?
For technical support, including 1KSMB56AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB56AH requirements.
6.How does Aetrix verify that 1KSMB56AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB56AH 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 1KSMB56AH meets industry standards.
7.What is the process for return or replacement of 1KSMB56AH?
All 1KSMB56AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB56AH, 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 1KSMB56AH part is unused and in its original packaging.
Return procedure for 1KSMB56AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB56AH 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…
